JMS, Vol. 50, No. 1, 2014
GEOMECHANICS
COMPUTER SIMULATION OF EFFECTIVE VISCOSITY
OF FLUID–PROPPANT MIXTURE USED IN HYDRAULIC FRACTURING
V. A. Kuzkin, A. M. Krivtsov, and A. M. Linkov
The paper presents results of numerical experiments performed to evaluate the effective viscosity of a fluid–proppant mixture, used in hydraulic fracturing. The results, obtained by two complimenting methods (the particle dynamics and the smoothed particle hydrodynamics), coincide to the accuracy of standard deviation. They provide an analytical equation for the dependence of effective viscosity on the proppant concentration, needed for numerical simulation of the hydraulic fracture propagation.
Proppant transport, hydraulic fracture, effective properties, viscosity, suspension, particle dynamics, smoothed particle hydrodynamics
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4. Alekseenko, O.P. and Vaisman, A.M., Certain Aspects of a Two-Dimensional Pon the Hydraylic Fracturing of an Elastic Medium, Journal of Mining Science, 1999, vol 35, no. 3, pp. 269–275.
5. Savitski, A.A. and Detournay, E., Propagation of a Fluid-Driven Penny-Shaped Fracture in an Impermeable Rock: Asymptotic Solutions, Int. J. Solids Structures, 2002, vol. 39.
6. Adachi, J., Siebrits, E., et al., Computer Simulation of Hydraulic Fractures, Int. J. Rock Mech. Mining Sci., 2007, vol. 44.
7. Peirce, A. and Detournay, E., An Implicit Level Set Method for Modeling Hydraulically Driven Fractures, Comput. Methods Appl. Mech. Engng., 2008, vol. 197.
8. Garagash, D.I., Detournay, E., Adachi, J.I., Multiscale Tip Asymptotics in Hydraulic Fracture with Leak-Off, J. Fluid Mech., 2011, vol. 669.
9. Linkov, A.M., On Efficient Simulation of Hydraulic Fracturing in Terms of Particle Velocity, Int. J. Engineering Sci., 2012, vol. 52.
10. Lecampion, B., Peirce, A., Detournay, E., Zhang, X., Chen, Z., Bunger, A., Detournay, C., Napier, J., Abbas, S., Garagash, D., and Cundall, P., The Impact of the Near-Tip Logic on the Accuracy and Convergence Rate of Hydraulic Fracture Simulators Compared to Reference Solutions, Effective and Sustainable Hydraulic Fracturing, Andrew, J.M., Bunger, P., Jerey, R. (Eds.), Rijeka, Croatia, 2013.
11. Linkov, A.M., Analytical Solution of Hydralic Fractur Problem for a Non-Newtonian Fluid, Journal of Mining Science, 2013, vol. 49, no. 1, pp. 8–18.
12. Einstein, A., Eine neue Bestimmung der Molekuldimensionen, Ann. Phys., 1906, vol. 19.
13. Brady, J.F., The Einstein Viscosity Correction in n Dimensions, Int. J. Mult. Flow, 1983, vol. 10.
14. Mooney, M., The Viscosity of a Concentrated Suspension of Spherical Particles, J. Colloid Sci.,
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17. Dorr, A., Sadiki, A., and Mehdizadeh, A., A Discrete Model for the Apparent Viscosity of Polydisperse Suspensions Including Maximum Packing Fraction, J. Rheol., 2013, vol. 57.
18. Mueller, S., Llewellin, E.W., et al., The Rheology of Suspensions of Solid Particles, Proc. R. Soc. A, 2010, vol. 466.
19. Foss, D.R. and Brady, J.F., Structure, Diffusion and Rheology of Brownian Suspensions by Stokesian Dynamics Simulations, J. Fluid. Mech., 2000, vol. 407.
20. Martys, N.S., Study of a Dissipative Particle Dynamics Based Approach for Modeling Suspensions, J. Rheol., 2005, vol. 49.
21. Martys, N.S., George, W.L., et al., A Smoothed Particle Hydrodynamics-Based Fluid Model with a Spatially Dependent Viscosity: Application to Flow of a Suspension with a Non-Newtonian Fluid Matrix, Rheol. Acta, 2010, vol. 49.
22. Wang, Y., Keblinski, P., et al., Viscosity Calculation of a Nanoparticle Suspension Confined in Nanochannels, Phys. Rev. E, 2012, vol. 86.
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25. Krivtsov, A.M., Deformirovanie i razrushenie tverdykh tel s microstructuroi (Deformation and Failure of Microstructure Solids), Moscow: Fizmatlit, 2007.
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GEOMECHANICAL ASSESSMENT OF MINING CONDITIONS
AT THE KHINGANSK MANGANESE ORE BODY
I. Yu. Rasskazov, B. G. Saksin, M. I. Potapchuk, and V. I. Usikov
The article reports the geomechanical assessment of rockburst-hazardous Khingansk manganese ore body (Poperechny extraction site) at the early stage of development. The researchers accomplished geodynamic zoning of the ore body, analyzed mining-and-geological and mine-technical conditions, and estimated parameters of physico-mechanical properties of host rocks and ore. Using numerical modeling, the stress state of the ore body and rock mass at various mining stages is assessed, and the bottom part of the Khingansk ore body is considered rockburst-hazardous.
Mining-and-geological conditions, geodynamic zoning, rocks, physico-mechanical properties, stress–strain state, mathematical modeling, mining method, pillars, rockburst hazard
REFERENCES
1. Petukhov, I.M., Egorov, P.V., and Vinokur, B.Sh., Predotvrashchenie gornykh udarov na rudnikakh (Rockburst Prevention in Mines), Moscow: Nedra, 1984.
2. Bich, Ya.A. and Muratov, N.A., Profilaktika gornykh udarov (Rockburst Preventive Measures), Vladivostok: Dal’nevost. Univer., 1990.
3. Mel’nikov, N.N., Kozyrev, A.A., Savchenko, S.N., et al., Prediction and Prevention of Rock Bursts, Tectonic Shocks, and Technogenic Earthquakes from Positions of Nonlinear Geomechanics, Journal of Mining Science, 2001, vol. 37, issue 4, pp. 354–366.
4. Rasskazov, I.Yu., Kontrol’ i upravlenie gornym davleniem na rudnikakh Dal’nevostochnogo regiona (Ground Pressure Monitoring and Control in the Far East Mines), Moscow: Gornaya kniga, 2008.
5. Didenko, A.N., Kaplun, V.B., Malyshev, Yu.F., et al., Glubinnoe stroenie i metallogeniya Vostochnoi Azii Deep Structure and Metallogeny in the East Asia), Vladivostok: Dal’nauka, 2010.
6. Kulish, L.I., Metamorficheskie margantsevye kompleksy Dal’nego Vostoka (Metamorphic Manganese Formation in the Far East), Khabarovsk: DVIMS, 1974.
7. Arkhipov, G.I., Dal’nevostochnaya chernaya metallurgiya: Zhelezorudnosyr’evaya baza i vozmozhnosti razvitiya (The Far East Iron Metallurgy: Iron Ore Raw Material Resource Base and the Development Opportunities), Khabarovsk: IGD DVO RAN, 2005.
8. Batugina, I.M. and Petukhov, I.M., Geodinamicheskoe raionirovanie mestorozhdenii pri proektirovanii i ekspluatatsii rudnikov (Geodynamic Zoning of Deposits in Mine Planning and Operation), Moscow: Nedra, 1988.
9. Usikov, V.I., Dynamics and Structure of Tectonic Flows. Analysis of 3D Relief Models, Proc. 7th Kosygin’s Lectures: Tectonics, Magmatism and Geodynamics of the East Asia, Khabarovsk: Kosygin’s ITiG, 2011.
10. Rasskazov, I.Yu., Kursakin, G.A., Berman, B.I., et al., Dynamic Events due to Ground Pressure Impact at the Khingansk Deposit, Gorny Zh., 1992, no. 3.
11. Rasskazov, I.Yu., Numerical Modeling of the Modern Tectonic Stress Field at the Intersection of the Central Asia and Pacific Belts, Tikhookean. Geolog., 2006, vol. 25, no. 5.
12. Zoteev, O.V., Numerical Modeling of the Stress–Strain State of Rocks, Izv. vuzov, Gorny Zh., 2003, no. 5.
13. Rasskazov, I.Yu., Kursakin, G.A., Potapchuk, M.I., Miroshnikov, V.I., Freidin, A.M., and Osadchy, S.P., Geomechanical Assessment of Deep-Level Mining Conditions in the Yuzhnoe Complex Ore Deposit, Journal of Mining Science, 2012, vo. 48, no. 5, pp. 874–881.
STRESS–STRAIN STATE OF ENCLOSING ROCK MASS AROUND
AN ARBITRARY CROSS-SECTION EXCAVATION BY MEASUREMENT
OF DISPLACEMENTS OF THE EXCAVATION WALLS
A. I. Chanyshev and I. M. Abdulin
The stress–strain state in rocks around an excavation is assessed by the values of stresses “at infinity”, i.e., it is required to know stress distribution in an intact rock mass. The authors propose a new method of the stress–strain state assessment for an arbitrary cross-section excavation based on direct measurement of displacements of the excavation walls, using the Kolosov–Muskhelishvili formulas. Under analysis are the excavations shaped as circular and elliptical cylinders.
Stresses, strains, displacements, displacement measurement, Kolosov–Muskhelishvili potentials
REFERENCES
1. Shvab, À.À., Non-Classical Elastoplastic Problem, Izv. ÀN SSSR, Mekh. Tverd. Tela, 1988, no. 1.
2. Chanyshev, À.I., To the Problem of Deformable Medium Failure. Part I: Basic Equations, Journal of Mining Science, 2001, no. 3, pp. 273–288.
3. Chanyshev, À.I. and Abdulin, I.M., Characteristics and the Relations on Them at the Stage of Post-Limit Deformation in Rocks, Journal of Mining Science, 2008, no. 5, pp. 451–463.
4. Chanyshev, À.I., A Method to Determine a Body’s Thermal State, Journal of Mining Science, 2012,
no. 4, pp. 660–668.
5. Mirenkov, V.Å., Relation between Stresses and Shifts at the Periphery of a Working, Journal of Mining Science, 1978, no. 3, pp. 251–254.
6. Mirenkov, V.Å., Solution of Elastoplastic Problems, Journal of Mining Science, 1979, no. 3, pp. 225–227.
7. Muskhelishvili, N.N., Nekotorye osnovnye zadachi matematicheskoi teorii uprugosti (Some Basic Problems of Mathematical Theory of Elasticity), Moscow: Nauka, 1966.
8. Rabotnov, Yu.N., Mekhanika deformiruemogo tverdogo tela: ucheb. posobie dlya mekhmat. i fiz. spets. universitetov (Mechanics of Deformable Solid Body: Educational Aid for Mechanical-Mathematical and Physical Specialties at Universities), Moscow: Nauka, 1988.
9. Savin, G.N., Raspredelenie napryazheniy okolo otverstiy (Distribution of Stresses around Holes), Kiev: Naukova dumka, 1968.
GPR DETECTION OF INHOMOGENEITIES IN CONCRETE LINING
OF UNDERGROUND TUNNELS
V. D. Baryshnikov, A. P. Khmelin, and E. V. Denisova
The authors present the results of underground excavation lining examination aimed at detecting inhomogeneities in the lining (reinforcement metal, voids, weakening) and recommend on selecting the lining sites to be optimal for measurement hole drilling based on field observations.
Excavation, concrete lining, georadar method, radargram, inhomogeneity
REFERENCES
1. Shkuratnik, V.L. and Nikolenko, P.V., Metody opredeleniya napryazhenno-deformiruemogo sostoyaniya massiva gornykh prodo: nauchno-obrazovatel’nyi kurs (Methods of Stress–Strain State Assessment in Rock Masses: Education and Research Courses), Moscow: MGGU, 2012.
2. Zoteev, O.V., Geomekhanika: ucheb. pposobie dlya studentov vuzov (Geomechanics: Academician Educational Aid), Ekaterinburg: UGGU, IGD UrO RAN, 2003.
3. Rukovodstvo po primeneniyu metoda razgruzki kerna s tsentral’noi skvazhinoi dlya opredeleniya napryazhenii v massive osadochnykh gornykh porod (Application Guide on Destressing of Drill Core with a Central Hole for Stress Assessment in Sedimentary Rock Mass), Novosibirsk: IGD SO AN SSSR, 1969.
4. Kurlenya, M.V., Baryshnikov, V.D., Bobrov, G.F., Popov, S.N., and Fedorenkom V. K., USSR Authors’s Certificate no. 877005, Byull. Izobret., 1981, no. 40.
5. Baryshnikov, V.D., Kurlenya, M.V., Popov, S.N., et al., Method of In Situ Determination of Elastic Properties of Rocks in the Method of Parallel Holes, Journal of Mining Science, 1982, vol. 18,
no. 1, pp. 69–71.
6. Finkel’shtein, M.I., Mendel’son, V.A., and Kutev, V.A., Radiolokatsiya sloistykh zemnykh pokrovov (Radio Location of Layered Earth Covers), Moscow: Sov. radio, 1977.
7. Dolukhanov, M.P., Rasprostranenie radiovoln (Radio Wave Propagation), Moscow: Gos. izd. vopr. svyazi radio, 1960.
8. Vladov, V.M. and Starovoitov, A.V., Vvedenie v georadiolokatsiyu: ucheb. posobie (Introduction to Geo Radiolocation: Educational Aid), Moscow: MGU, 2004.
9. Grinev, A/.Yu. (Ed.), Voprosy pripoverkhnostnoi radiolokatsii (Subsurface Radiolocation Issues), Moscow: Radiotekhnika, 2005.
10. SIR-300, http://www.geophysical.com/Documentation/Brochures/GSSI-SIR-3000Brochure.pdf.
11. Metodicheskie rekomendatsii po primenenyu georadarov pri obsledovanii dorozhnykh konstruktsii (Instructional Guidelines on Georadar Inspection of Road Structures), Moscow: Rosavtodor, 2004.
12. Polozhenie o poryadke proizvodstva rabot po geofizicheskomu obsledovaniyu ob’ektov ulichno-dorozhnoi seti goroda Moskvy (Regulation on Geophysical Inspection of Street-and-Road System Objects in the City of Moscow), approved by the Government of Moscow as of July 24, 2004.
ZONAL DISINTEGRATION OF ROCK MASS
AROUND AN UNDERGROUND EXCAVATION
V. E. Mirenkov
In focus is the problem of mathematical modeling of zonal disintegration of rocks around a deep-level excavation. In the framework of the elastic model of isotropic material, the author analyzes the two-dimensional case on stress field in rocks around a circular cross-section excavation. The acting compressive stresses at infinity depend on the depth of the excavation occurrence. The shear stress analysis has shown that in rocks around the excavation, the increased shear stress circle zone appears at the distance from the excavation center. The increased stresses come before the rock mass disintegration and create conditions for next destruction circles. The author dwells on probable influence of initial hydrostatic stress on the disintegration law. In modeling, the zonal disintegration circles appear at larger distance from the excavation center than in the experiment, due to the idealization of the classical problem formulations in rock mechanics.
Zonal disintegration, excavation, stresses, analytical solution, destruction, elasticity
REFERENCES
1. Shemyakin, E.I., Kurlenya, Ì.V., Oparin, V.N., Reva, V.N., and Rozenbaum, Ì. À., USSR Discovery
no. 400. The Phenomenon of Zonal Disintegration of Rock Mass around Underground Excavations, Bull. Izobret., 1992, no. 1.
2. Mirenkov, V.Å., On Probable Failure of an Undercut Rock Mass, Journal of Mining Science, 2009,
no. 2, pp. 105–111.
3. Oparin, V.N, Tapsiev, À.P., Rozenbaum, Ì.À., et al., Zonal’naya dezintegratsiya gornykh porod i ustoychivost’ podzemnykh vyrabotok (Zonal Disintegration of Rock Mass and the Stability of Underground Excavations), Novosibirsk: SO RAN, 2008.
4. Guzev, Ì.À. and Makarov, V.V., Deformirovanie i razrushenie sil’noszhatykh gornykh porod vokrug vyrabotok (Deformation and Failure of Highly Compressed Rock Mass around Excavations), Vladivostok: Dal’nauka, 2007.
5. Muskhelishvili N. I., Nekotorye osnovnye zadachi matematicheskoi teorii uprugosti (Some Basic Problems of Mathematical Theory of Elasticity), Moscow: Nauka, 1967.
SHOCK WAVE IN. A. COAL BED UNDER NONUNIFORM DESORPTION
A. V. Fedorov
The processes of free and absorbed coal gas filtration and diffusion are described using the earlier offered mathematical model in the form of the set of nonhomogenous parabolic equations. Movement of such medium is considered in the form of a progressive (shock) wave, i.e., the self-similar approximation. It is proved that the problem reduces to the plane boundary value problem of the quality theory of the regular differential equations. The effect of the gas sorption relaxation time on the shock wave structure is quantitatively estimated.
Multi-phase media, nonequilibrium filtration
REFERENCES
1. Krichevsky, R.M., Nature of Gas Emission with Coal Oubursts, Byull. MakNII, 1948, no. 18.
2. Khristianovich, S.A., Gas Pressure Distribution near a Shifting Free Surface in Coal, Izv. AN SSSR, Otd. Tekh. Nauk, 1953, no. 12.
3. Khristianovich, S.A., Outburst Wave, Izv. AN SSSR, Otd. Tekh. Nauk, 1953, no. 12.
4. Nikol’sky, A.A., Outburst Waves in Gassy Rocks, Dokl. AN SSSR, 1953, vol. 88, no. 4.
5. Nikol’sky, A.A., Crashing Waves in Gassy Coal, Dokl. AN SSSR, 1954, vol. 96, no. 1.
6. Kuznetsov, S.V. and Krigman, R.N., Prirodnaya pronitsaemost’ ugol’nykh plastiv i metody ee opredeleniya (Natural Permeability of Coal and Estimation Methods), Moscow: Nauka, 1978.
7. Vorozhtsov, E.V., Fedorov, A.V., and Fomin, V.M., Gas and Coal Mixture Flow in Mines, Considering Desorption, Aeromekhanika: sb. statei (Aeromechanics: Collected Works), Moscow: Nauka, 1976.
8. Fedorov, A.V., Compression Shock Waves in Gas Filtration in Coal, Upravlenie ventilyatsiei i gazodinamicheskimi yavleniyami: sb. nacuh. trudov (Ventilation and gas-Dynamic Phenomena Control: Collection of Scientific Papers), Novosibirsk: IGD SO AN SSSR, 1977.
9. Fedorov, A.V., Contribution to the Theory of Nonisothermal Nonequilibrium Filtration of Gas in Coal Seams, Soviet Mining, 1977, vol. 13, no. 2, pp. 182–190.
10. Fedorov, A.V., Analysis of Equations of Coal and Gas Outburst, Chisl. Met. Mekh. Splosh. Sred., 1980,
vol. 11, no. 4.
11. Fedorov, A.V., Fomin, V.M., and Okhunov, M.Kh., Determination of the Thickness of the Khristianovich Crushing Wave with Consideration of Nonequilibrium Nonisothermal Desorption, Journal of Mining Science, 1981, vol. 17, no. 1, pp. 54–60.
12. Fedorov, A.V. and Fedorchenko, I.A., Mathematical Model of Methane Flow in Coal Beds, Journal of Mining Science, 2009, vol. 45, no. 1, pp. 9–21.
LOCALIZATION OF DEFORMATION
AND PROGNOSTIBILITY OF ROCK FAILURE
L. B. Zuev, S. A. Barannikova, M. V. Nadezhkin,
and V. V. Gorbatenko
The general regular patterns in focalization of deformation at pre-failure stage in rocks under compression are found and analyzed (sylvinite, marble sandstone). Applicability of speckle-photography methods in problems on rock deformation and failure is proved. The authors define the self-sustained behavior of the focalized plastic deformation in rocks under compression, due to effect of various plastic micromechanisms. The self-sustained structures in rock specimens under compression propagate at a rate of ~ 10–5 ÷ 10–4 m/s (0.3–3 km/yr), which is close to slow motions induced in the earth crust by an earthquake or a rockburst. The ratio of the experimental and calculated failure times is correlated with the coordinates of the failure points in the test rock specimens.
Deformation, failure, rocks, focalization, self-sustained structures
REFERENCES
1. Stacey, F., Physics of the Earth, Wiley, 1969.
2. Ferhugen, J, Terner, F., Weiss, L., et al., The Earth. An Introduction to General Geology, New York: Holt–Rinehart–Winston, 1970.
3. Oparin, V.N., Tapsiev, A.P., Rozenbaum, M.A. et al., Zonal’naya dezintegratsiya gornykh porod i ustoichivost’ podzemnykh vyrabotok (Zonal Disintegration of Rocks and Stability of Underground Excavations), Novosibirsk: SO RAN, 2008.
4. Gol’din, S.V., Seismicheskie volny v anizotropnykh sredakh (Seismic Waves in Anisotropic Media), Novosibirsk: SO RAN, 2008.
5. Zuev, L.B., Danilov, V.I., and Barannikova, S.A., Fizika makrolokalizatsii plasticheskogo techeniya (Physics of Macrolocalization of Plastic Flow), Novosibirsk: Nauka, 2008.
6. Zuev, L.B., Danilov, V.I., Barannikova, S.A., and Gorbatenko, V.V., Autowave Model of Localized Plastic Flow of Solids, Phys. Wave Phenom., 2009, vol. 17, no. 1.
7. Zuev, L.B., Autowave Mechanics of Plastic Flow in Solids, Phys. Wave Phenom., 2012, vol. 20, no. 3.
8. Gamburtsev, A.G., Modern Geodynamics and Accidents, Vestn. RAN, 1995, vol. 65, no. 7.
9. Kurlenya, M.V., Adushkin, V.V., Garnov, V.V., Oparin, V.N., Revuzhenko, A.F., and Spivak, A.A., Sign-Alternating Rock Response to the Dynamic Attack, Dokl. RAN, 1992, vol. 323, no. 2.
10. Vvedenskaya, A.V., Issledovanie napryazhenii i razryvov v ochagakh zemletryasenii pri pomoshchi teorii dislokatsii (Analysis of Stresses and Fractures in Earthquake Sources Using the Dislocation Theory), Moscow: Nauka, 1969.
11. Sobolev, G.A. and Demin, V.M., Mekhanoelektricheskie yavlenya v Zemle (Mechanical-Electrical Phenomena in Earth), Moscow: Nauka, 1980.
12. Vettegren’, V.I., Kuksenko, V.S. and Shcherbakov, I.A., Dynamics of Microcracks and Time Dependence of Deformation of Heterogeneous Body (Granite) Surface under Impact, Fiz. Tverd. Tela, 2012, vol. 54, no. 7.
13. Pelleg, J., Mechanical Properties of Materials, Dordrecht: Springer, 2013.
14. Zuev, L.B, Gorbatenko, V.V., and Pavlichev, K.V., Elaboration of Speckle Photography Techniques for Plastic Flow Analyses, Measur. Sci. Technol., 2010, vol. 21, no. 5.
15. Barannikova, S.A., Nadezhkin, M.V., Zuev, L.B., and Zhigalkin, V.M., Nonuniformity of Sylvinite Deformation under Compression, Letters to ZhTF, 2010, vol. 36, no. 11.
16. Zuev, L.B., Barannikova, S.A., Zhigalkin, V.M., and Nadezhkin, M.V., Observation of “Slow Motions” in Rocks in Lab, Prikl. Mekh. Tekh. Fiz., 2012, vol. 53, no. 3.
17. Gol’din, S.V., Dilatancy, repacking and Earthquakes, Fiz. Zemli, 2004, no. 10.
18. Kurlenya, M.V., Oparin, V.N., and Vostrikov, V.I., Pendulum-Type Waves. Part I: State of the Problem and Measuring Instrument and Computer Complexes, Journal of Mining Science, 1996, vol. 32,
no. 3, pp. 159–163.
19. Oparin, V.N. and Simonov, B.F., Non-Linear Deformation Wave Processes in Vibrational Oil Geotechnologies, Journal of Mining Science, 2010, vol. 46, no. 2, pp. 95–112.
20. Kurlenya, M.V., Oparin, V.N., and Vostrikov, V.I., Generation of Elastic Wave Packets in Block Media by Impulse Excitation. Pendulum Type Waves, Dokl. RAN, 1993, vol. 333, no. 4.
21. Vikulin, A.V., New Type of Elastic Rotation Waves in Geomedum and the Vortex Geodynamics, Geodinam. Tektonofiz., 2010, vol. 1, no. 2.
22. Oparin, V.N., Tanaino, A.S., and Yushkin, V.F., Discrete Properties of Entities of a Geomedium and Their Canonical Representation, Journal of Mining Science, 2007, vol. 43, no. 3, pp. 221–236.
23. Chanyshev, A.I., To the Problem of Deformable Medium Failure. Parts I and II, Journal of Mining Science, 2001, vol. 37, nos. 3 and 4, pp. 273–288 and pp. 392–400.
24. Danilov, V.I. and Zuev, L.B., Macrolocalization of Plastic Strain and Stadiality of Plastic Flow in Polycrystal Metals and Alloys, Usp. Fiz. Metall., 2009, vol. 9, no. 4.
INFLUENCE OF VERTICAL FRACTURE ON THE STRESS–STRAIN STATE
OF THE FLAT SHEET EDGE AREA UNDER MINING
V. A. Trofimov
Under consideration is the stress–strain state in the edge area of a bed when mine faces approach a vertical fracture. The author illustrates the stress–strain state analysis using the previously derived analytical solution for a single pillar situated symmetrically in a mined-out void. Comparison of the analytical and numerical results shows their admissible precision.
Fracture, edge bed area, complex potential method, numerical methods, boundary element method, displacement discontinuity method
REFERENCES
1. Reva, V.N., Barkovsky, V.M., and Belousov, A.P., Study of the Stability of Development and Preparatory Workings in Zones of tectonic Dislocations in Mines of the Norilsk Mining and Metallurgical Works, Journal of Mining Science, 1984, vol. 20, no. 3, pp. 183–188.
2. Gadzhiev, M.M. and Panas’yan, L.L., Results of the Complex Structure Rock Mass Stress–Strain State Assessment Using the Computational Method, Napryazhenno-deformirovannoe sostoyanie i ustoichovost’ skal’nykh sklonov i bortov kar’erov (Stress–Strain State and Stability of Hard Rock Slopes and Pitwalls), Frunze: Ilim, 1979.
3. Varderesyan, T.L., Influence of the Fault Width on the Stress State in Rocks Surrounding a Stope, Napryazhenno-deformirovannoe sostoyanie i ustoichovost’ skal’nykh sklonov i bortov kar’erov (Stress–Strain State and Stability of Hard Rock Slopes and Pitwalls), Frunze: Ilim, 1979.
4. Veksler, Yu.A., Zhdankin, N.A., and Kolokolov, S.B., Stresses and Strains in Rocks in the Vicinity of a Production Face Located in the Zone of Geological Fault, Gornoe davlenie v
kapital’nykh i podgotovitel’nmykh vyrabotkakh (Rock Pressure in Permanent and Temporary Roadway), Novosibirsk, 1981.
5. Egorov, P.V., Red’kin, V.A., Kalugin, V.V., and Pashchenko, A.V., Influence of Faulting on Rockbursting, Gorny Zh., 1983, no. 5.
6. Trubetskoy, K.N., Bronnikov, D.M., Kuznetsov, S.V., and Trofimov, V.A., Mine-Shock Mechanism and Loads on the Dividing Columns for Workings in Plate Strata, Journal of Mining Science, 1995, vol. 31, no. 5, pp. 321–332.
7. Kuznetsov, S.V. and Trofimov, V.A., Method of Estimation of Roof Rock Lamination in a Long Stope, Proc. Conf. Geodynamics and Stress State of the Earth’s Interior, Novosibirsk :IGD SO RAN, 2009.
8. Kuznetsov, S.V. and Trofimov, V.A., Long Stope Roof Stability, Proc. 2nd Int. Conf. Underground Accidents: Models, Forecasting, Prevention, Dnepropetrovsk: NGU, 2011.
9. Trofimov, V.A., Numerical Modeling of Interaction between a Fault and Stopes in the Course of Mining, Fizicheskie osnovy prognozirovaniya razrusheniya gornykh porod (Physical Bases for Forecasting Rock Failure), Frunze: Ilim, 1985.
10. Gradshetain, I.S. and Ryszhik, I.M., Tablitsy integralov, sum, ryadov i proizvedenii (Tables of Integrals, Sums, Sequences and Products), Moscow: Gosizdat. Fiz.-Mat. Lit., 1963.
11. Kuznetsov, S.V., General Relationships and Characteristic Features of Stress Redistribution in
a Rock Mass during Development of a Worked-Out Space, Journal of Mining Science, 1988, vol. 24,
no. 6, pp. 501–513.
12. Kuznetsov, S.V. and Trofimov, V.A., Stress–Strain State of the Stratum Edge Area, Erzhanov’s Lectures-3, Aktobe, 2010.
METHANE RELEASE IN DRAINAGE HOLES AHEAD OF COAL FACE
V. S. Brigida and N. N. Zinchenko
The authors have revealed features of local minimum methane concentration in drainage holes and causes of the methane concentration zonality. The offered hypothesis on methane release in wells accounts for zonal disintegration of rock mass around an excavation.
Drainage holes, zonal disintegration of rocks, methane concentration
REFERENCES
1. Ukrainian State Standard 10.1.00174088.001.-2004, Kiev: Mintopenergo Ukr., 2005.
2. Ukrainian State Standard-P 10.1.00185790.014: 2009, Kiev: Minugleprom. Ukr., 2010.
3. Best Practice Guidance for Effective Methane Drainage and Use in Coal Mines, UNECE Energy Series, 2010, no. 31.
4. Bredle, E., Effect of Methane Capture on Coal Extraction Performance, Gluckauf, 1974, no. 9.
5. Koppe, U. And Stegmans, W., Gas Capture Improvement by Task-Specific Casing Structure Strengthening, Gluckauf, 1977, no. 22.
6. Hoak, G., Gas Combating Analysis Results, Gluckauf, 1979, no. 4.
7. Creedy, D. and Garner, K., Handbook on the Effective Design and Management of Firedamp Drainage for UK Coal Mines, Contract Research Report no. 326, Newcastle-under-Lyme, Staffordshire, 2001.
8. Black, D. and Aziz, N., Actions to Improve Coal Seam Gas Drainage Performance, Proc. 11th Underground Coal Operators’ Conf., Wollongong: University of Wollongong & the Australasian Institute of Mining and Metallurgy, 2011.
9. Driban, V.A., Irreversible Strain Zone Formation around Mine Workings, Probl. Gorsk. Tisk., (Ground Control in Mining), 2010, no. 18.
10. Kostenko, V.K., Zinchenko, N.N., and Brigada, V.S., Analysis of Drainage Hole Failure during xatrcation Pillar Mining, Proc. Reg. Conf. Environmental Challenges of the Fuel and Energy Industry, Donetsk: DonNTU, 2010.
11. Nazimko, V.V., Bryukhanov, P.A., and Demchenko, A.I., Connection between Gas Drainage Hole Deformation and Aerodynamic Parameters, Sposob. Strdstv. Sozd. Bezopasn. Zdorov. Usl. Trud. Ug. Shakht., 2010, no.2.
12. Alekseev, A.D., Zaidenvarg, V.E., and Sinolitsky, V.V., New Ideas on Phase State of Coalbed Methane, Proc. 24th Int. Conf. Safety in Mining Industry, Donetsk, 1991.
13. Andreev, M.M., Formation of a Family of Aerodynamically Connected Fractures in Rock Mass, Razrab. Mest. Polezn. Iskop., 1988, issue 81.
14. Shemyakin, EE.I., Kurlenya, M.V., Oparin, V.N., Reva, V.N., Glushikhin, F.P., and Rozenbaum, M.A., USSR Discovery no. 400, Byull. Izobret., 1992, no. 1.
15. Kostenko, V.K., Zinchenko, N.N., Boky, A.B., and Brigada, V.S., Relationship of Methane Rarefaction and Concentration in Drainage Pipes, Vist. Donetsk. Girn. Inst., 2010, issue 1.
CHANGE IN THE PITWALL STABILITY WITH DEPTH
A. G. Bagdasar’yan and V. N. Sytenkov
It is known that under certain conditions, the structural geology, seismic, design and technology factors do not inhibit increase in the inclination of the limit pitwalls in deep open pit mines. The evaluation of the limit pitwall stability is made by the pitwall stability index, considered in ideal case. In practice, , which flattens pitwalls, expands the open pit mine limits on the surface and expands stripping. Therefore V. N. Sytenkov has proposed to construct a convex pitwall with the depth-wise decreasing stability index. It is assumed that when an open pit mine reaches its design depth and depletes its design reserves, the open pit mine stability coefficient cannot exceed 1. The article shows that this approach has both economical and physical preconditions.
Rock mechanics, disrupture structure, inhomogeneous medium, pitwall stability
REFERENCES
1. Rodionov, V.N., Sizov, I.A., and Tsvetkov, V.M., Osnovy geomekhaniki (Fundamentals of Geomechanics), Moscow: Nauka, 1986.
2. Bagdasar’yan, A.G., Lukishov, B.G., Rodionov, V.N., and Fedyanin, A.S., Detection of Features of a Rupture Structure in Walls of an Open Pit in Terms of the Muruntau Open Pit, Journal of Mining Science, 2008, vol. 44, no. 1, pp. 73–81.
3. Rodionov, V.N., Sizov, I.A., and Bagdasar’yan, A.G., Structure of Failure of Rock Mass, Izv. AN SSSR, Fiz. Zemli, 1989, no. 12.
4. Bagdasar’an, A.G., Fedyanin, A.S., and Shemetov, P.A., Estimate of the Formation Time and Other Parameters of the Disruption Structure in Open Pit Walls in Terms of Muruntau Open Pit, Journal of Mining Science, 2009, vol. 45, no. 2, pp. 146–151.
MINING THERMOPHYSICS
ANALYTICAL SOLUTIONS OF SOME HEAT TRANSFER PROBLEMS
IN MINING PRACTICE
N. N. Smirnova, N. V. Nikolaeva, V. N. Brichkin, and V. B. Kuskov
The article reviews analytical methods of studying heat transfer processes running in the conditions of resource-saving underground coal processing, heat drying in processing facilities and in the course of heat accumulation and emission in caved rocks. The author considers problems with boundary conditions formulated at the moving boundary of the heat transfer domain.
Drying, heat conduction, temperature, heterogeneous medium, heat loss
REFERENCES
1. Dyad’kin, Yu.D., Gendler, S.G., and Smirnova, N.N., Geotermal’naya teplofizika (Geothermal Thermophysics), Saint-Petersburg: Nauka, 1993.
2. Nigmatulin, R.I., Osnovy mekhaniki geterogennykh sred (Basics of the Mechanics of Heterogeneous Media), Moscow: Nauka, 1978.
3. Rubinshtein, L.I., Temperturnye polya v neftyanykh plastakh (Temperature Fields in Oil Strata), Moscow: Nedra, 1972.
4. Egorov, A.G. and Salamatin, A.N., Average Description of Transfer Processes during Filtration in Jointy and Porous Media, Teplofiz. Vysok. Temper., 1984, vol. 22, no. 5.
5. Smirnova, N.N., Solution of Equations on Heat Transfer during Filtration by the Method of Reduction to the Equivalent Heat Conduction Equation, Fizicheskaya gidrodinamika i teploobmen (Physical Hydrodynamics and Heat Transfer), Novosibirsk: ITF SO AN SSSR, 1978.
6. Smirnova, N.N., Nestatsionarnyi teploobmen pri fil’tratsii v geterogennykh sredakh (Unsteady-State Heat Transfer during Filtration in Heterogeneous Media), Novosibirsk: ITF SO AN SSSR, 1990.
7. Smirnova, N.N., Basis and Development if the Method to Solve Problems on the Filtration Heat Transfer, Gorn. Inform.-Analit. Byull., 2005, no. 1.
8. Gringarten, A.C., Watherspoon, P.A., and Ohnichi, Y., Theory of Heat Extraction from Fractured Hot Dry Rock, J. Geophys. Res., 1975, no. 8.
9. Carslaw, H.S. and Jaeger, J.C., Conduction of Heat in Solids, Oxford University Press, 1959.
10. Nustov, V.S. and Saifulaev, B.N., The Method of Equivalent Equation in the Heat of Mass and Heat Transfer, Inzh.-Fiz. Zh., 1988, vol. 54, no. 5.
11. Dyad’kin, Yu.D., Smirnova, N.N., and Solov’ev, V.B., USSR Author’s Certificate no. 1155758, Byull. Izobret., 1985, no. 18.
12. Dyad’kin, Yu.D., Smirnova, N.N., Solov’ev, V.B., and Popova, T.V., RF patent no. 2012791, Byull. Izobret., 1994, no. 9.
13. Blinderman, M.S., Kazak, V.N., and Kapralov, V.K., Heat Capture and the Use of Combined
Heat of a Combined-Cycle Plant, Molodye uchenye—KATEKu (Young Scientists—to KATEK), Krasnoyarsk: Sibir, 1988.
14. Bogdanov, O.S. (Ed.), Spravochnik po obogashcheniyu rud: Spetsial’nye i vspomogatel’nye protsessy, ispytanya obogatimosti, kontrol’ i avtomatika (Ore Beneficiation Manual: Special and Secondary Processes, Preparability Testing, Control and Automation), Moscow: Nedra, 1983.
15. Grishin, D.M., Matematicheskoe modelirovanie nekotorykh nestatsionarnykh aerotermokhimicheskikh yavlenii (Mathematical Modeling of Some Unsteady-State Aero-Thermo-Chemical Events), Tomsk:
TGU, 1973.
16. Smirnova, N.N. and Solov’ev, V.B., Heat and Mass Transfer during Combustion in a
Hydrofracture, Fizicheskie protsessy gornogo proizvodstva: Inzhenerno-fizicheskie usloviya gidrorazryva gornykh porod (Physical Processes in Mining: Engineering-Physical Conditions of Hydrofracturing), Leningrad: LGI, 1987.
17. Smirnova, N.N. and Solov’ev, V.B., Estimation of Heat Loss in Gasification Channel, Fiz. Prots. Gorn. Proizv., 1982, issue 12.
SCIENCE OF MINING MACHINES
SELECTION PROCEDURE FOR HYDRAULIC IMPACT SYSTEM PARAMETERS
L. V. Gorodilov, D. V. Vagin, and O. A. Pashina
The developed procedure to select parameters of positive-displacement hydropercussion systems has two stages. The first stage is the picking of the key parameters; the second stage is the engineering design of the system, adjustment of the selected parameters using the multivariate optimization procedure and the improvement of the system performance.
Percussion system, limit cycle, optimized parameters, selection criteria
REFERENCES
1. Gorodilov, L.V., Analysis of the Dynamics of Two-Way Hydropercussion Systems. Part I: Basic Properties, Journal of Mining Science, 2012, vol. 48, no. 3, pp. 487–496.
2. Gorodilov, L.V., Analysis of the Dynamics of Two-Way Hydropercussion Systems. Part II: Influence
of the Design Factors and Their Interaction with Rocks, Journal of Mining Science, 2013, vol. 49, no. 3, pp. 465–474.
3. Gorodilov, L.V. and Pashina, O.A., Calculating Parameters of Self-Oscillating Hydraulic Percussion Systems Using Similarity Criteria, Proc. Int. Sci. Conf. Fundamental Problems of the Industrial Geo-Environment, Novosibirsk: IGD SO RAN, 2010, vol. 3.
4. Mamontov, M.A., Teoriya analogichnosti (Theory of Analogy), Moscow: Mashinostroenie, 1966.
5. Berdnikov, V.V., Prikladnaya teoriya gidravlicheskikh tsepei (Applied Theory of Hydraulic Circuits), Moscow: Mashinostroenie, 1977.
6. Zhilinskas, A. and Shaltyanis, V., Poisk optimuma (Search for an Optimum), Moscow: Nauka, 1989.
7. Gorodilov, L.V. and Vagin, D.V., Optimization Program for Parameters of Hydraulic Percussion Systems, Proc. Int. Sci. Conf. Fundamental Problems of the Industrial Geo-Environment, Novosibirsk: IGD SO RAN, 2009, vol. 2.
SELECTION OF EFFICIENT PARAMETERS AND OPERATION MODES FOR THE VALVE-SYNCHRONIZER OF THE TWO-SIDE SEALING DEVICE
Yu. M. Lekontsev, P. V. Sazhin, O. A. Temiryaeva, and S. Yu. Ushakov
Based on the mine investigations of directional hydraulic fracturing using the two-side sealing device, aimed at weakening of a dirty band in a coal bed, the researchers have refined the valve synchronizer and eliminated detected vibration defects. The article presents the laboratory analysis of the KS-1 valve synchronizer operation and validates its efficient performance parameters.
Directional hydraulic fracturing, two-side sealing device, valve synchronizer KS-1
REFERENCES
1. Lekontsev, Yu.M., Sazhin, P.V., and Ushakov, S.Yu., Interval Hydraulic Fracturing to Weaken Dirt Bands in Coal, Journal of Mining Science, 2012, vol. 48, no. 3, pp. 525–532.
2. Lekontsev, Yu.M., Sazhin, P.V., and Ushakov, S.Yu., Weakening a Dirt Band in Coal by the Interval Hydraulic Fracturing in the Romanovskaya Mine, Ugol’, 2012, no. 1.
3. Lekontsev, Yu.M., Sazhin, P.V., and Antonyuk, A.I., Practical Application of the Interval Hydraulic Fracturing for Dirt Band Weakening in Coal in the Romanovskaya Mine, Proc. 13th Int. Conf. Natural Resources and Brainpower of Siberia, Kemerovo, 2010.
4. Lekontsev, Yu.M., Sazhin, P.V., Temiryaeva, O.A., and Khoreshok, A.A., Two-Side Sealer Operation, Journal of Mining Science, 2013, vol. 49, no. 5, pp. 757–762.
5. Kondakov, L.A., Nikitin, G.A., Prokof’ev, V.N., Skritsky, V.Ya., and Sosonkin, V.L., Mashinostroitel’nyi gidroprivod (Engineering Hydraulics), Moscow: Mashinostroenie, 1978.
6. Bashta, T.M., Rudnev, S.S., Nekrasov, B.B., Baibakov, O.V., and Kirillovsky, Yu.L., Gidravlika, gidromashiny i gidroprivody (Hydraulics, Hydraulic Machines and Hydraulic Drives), Moscow: Mahinostroenie, 1982.
7. Siov, B.N., Istechenie zhidkosti cherez nasadki v sredy s protivodavleniem (Fluid Flow through Nozzles in the Media with Backpressure), Moscow: Mashinostroenie, 1968.
EXCITATION OF POLYHARMONIC VIBRATIONS IN SINGLE-BODY VIBRATION MACHINE WITH INERTIA DRIVE AND ELASTIC CLUTCH
S. L. Bukin, V. P. Kondrakhin, V. N. Belovodsky, and V. N. Khomenko
The authors analyze excitability of polyharmonic vibrations in a single-body vibration machine. The developed mathematical model of the vibration system accounts for an elastic component element included in the design of the unbalance vibration exciter drive. The operating limits, frequency content and effect of the main design factors on the flow data of the vibration machine are examined. It is found that superharmonic vibration greatly contributes to the polyharmonic spectrum at certain frequencies, depending on the stiffness of the elastic component element of the clutch connecting the vibration exciter and the rotary drive.
Vibration machine, unbalance vibration exciter, transmission, elastic clutch, spectrum, superharmonic vibrations
REFERENCES
1. Bukin, S.L., Maslov, S.G., Lyuty, A.P., and Reznichenko, G.L., Intensification of Process Circuits of Vibration Machines by Implementation of Biharmonic Operating Modes, Zbag. Koris. Kopal.: Nauk.-Tekhn. Zb., 2009, issues 36, 37.
2 Shevchenko, G.A., Shevchenko, V.G., and Kadyrov, A.R., Ploy-Frequency Screens for Fine Granular Materials, Zbag. Koris. Kopal.: Nauk.-Tekhn. Zb., 2009, issues 36–38.
3. Goncharevich, I.F., Enhancing Capacity and profitability of Industrial Nanotechnologies. Available at: http://www.slaviza.ru/mashinostroenie/
4. Ragul’skis (Ed.), Prakticheskoe ispol’zovanie nelineinykh efektov v vibratsionnykh mashinakh (Common Use of Nonlinear Effects in Vibration Machines), Saint-Petersburg: Politekhnika, 1992.
5. Levendel, E.E., Vibratsii v tekhnike. Tom 4: Vibratsionny protsessy i mashiny (Vibrations in Engineering. Volume 4: Vibration Processes and Machines), Moscow: Mashinostroenie, 1981.
6. Bykhovsky, I.I., Osnovy teorii vibratsionnoi tekhniki (Fundamentals of the Vibration Equipment Theory), Moscow: Mashinostroenie, 1968.
7. Goncharevich, I.F. and Dokukin, A.V., Dinamika gornykh mashin s uprugimi svyazyami (Dynamics of Mining Machines with Elastic Connections), Moscow: Nedra, 1975.
8. Sipailov, G.A., Kononenko, E.V., and Khor’kov, K.A., Elektricheskie mashiny: spetsial’nyi kurs (Electrical Machines: Special Course), Moscow: Vyssh. shk., 1987.
MINERAL MINING TECHNOLOGY
APPRAISAL AND EXPLOITATION OF MINING AND DRESSING WASTE
AT DREDGE SITES
V. I. Snetkov and B. L. Tal’gamer
The article gives analytical review of the mining and dressing waste situation and the experience gained in the waste exploration and reprocessing in Russia. The authors offer a new procedural approach to the appraisal and calculation of the mining and dressing waste accumulations with intent of their re-processing. The approach has been tested under conditions of diamond-containing mining and dressing waste sites.
Gold, diamonds, placer, gold sand, dredge, mining and dressing waste accumulations, exploration, re-processing
REFERENCES
1. Wan-Wan-E, A.P., Resursnaya baza prirodno-tekhnogennykh zolotorossypnykh mestorozhdenii (Reserves in the Natural Gold Placers and Placer Mining Waste), Moscow: MGU, 2010.
2. Mamaev, Yu.A., Litvintsev, V.S., and Ponomarchuk, G.P., Tekhnogennye rossypi blagorodnykh metallov Dal’nevostochnogo regiona Rossii i ikh ratsional’moe osvoenie (Noble Metal Mining Waste in the Far East of Russia and Its Rational Exploitation), Moscow: MGGU, 2010.
3. Oveshnikov, Y.M. and Bol’shakov, A.I., Some Results of Studies into Completeness of Dredging in Placers, Razrabotka rossypnykh mestorozhdenii (Placer Mining), Moscow: MGRI, 1987.
4. Mamaev, Yu.A., Wan-Wan-E, A.P., Sorokin, A.P., Litvintsev, V.S., and Pulyaevsky, A.M., Problemy ratsional’nogo osvoeniya zolotorossypnykh mestorozhdenii Dal’nego Vostoka (geologiya, dobych, pererabotka) (Problems of Rational Exploitation of Gold Placers in the Far East (Geology, Extraction, Processing)), Vladivostok: Dal’nauka, 2002.
5. Belov, S.V., Gold Mine Waste Accumulations: State-of-the-Art and Prospects, Zolotodob. Prom.,
2011, no. 4.
6. Kovlekov, I.I., Tekhnogennoe zoloto Yakutii (Gold in Mine Waste in Yakutia), Moscow: MGGU, 2002.
7. Yaroshenko, O.N., Possible Trends of Technology of Gold Extraction from Placer Mining Waste, Kolyma, 2003, no. 3.
8. Vasil’eva, E.A. and Patsev, I.I., Planning Gold Extraction from Dredge Dumps, Issledovaniya po problemam geodezii i kartografii (Studies into the Problems of Geodesy and Cartography), Irkutsk:
IGU IP, 1973.
9. Wan-Wan-E, A.P., Analytical Evaluation Procedure for Reserves of the Gold Placer Mining Waste in the Far East, Proc. Int. Conf. Problems of Gold Mine Waste Development, Magadan, 2010.
10. Wan-Wan-E, A.P., Expected Gold Reserves in Mine Waste in the Khabarovsk Region, Gonr. Inform.-Analit. Byull., 2009, no. 12.
11. Mamaev, Yu.A., Sheveleva, E.A., Litvintsev, V.S., and Ponomarchuk, G.P., Procedure of Expert Appraisal of the Reserves in Mine Waste by Indirect Indecators, Kolyma, 1995, nos. 11 and 12.
12. Tal’gamer, B.L., Chemezov, V.V., Neretin, A.V., and Dement’ev, S.A., Estimate of Diamond Loss in Placer Dredging, Problemy razvitiya mineral’noi bazy Vostochnoi Sibiri: sb. nauch. tr. (Problems of Mineral Base Development in East Siberia: Collection of Scientific Papers), Irkutsk: IrGTU, 2003.
13. Vilesov, G.I. and Medovshchikova, N.A., Geometrization and Appraisal of Gold Reserves in Dredge Dumps, Gony Zh., 1958, no. 1.
14. Snetkov, V.I., Cluster-Wise Distribution of Diamonds in a Placer—The Main Cause of Mining Loss, Gorn. Inform.-Analit. Byull., 2005, no. 8.
15. Snetkov, V.I., Tal’gamer, B.L., and Dement’ev, S.A., Analysis of Causes of Systematic Mismatch
in the Data on Diamond Reserves in Placers by Exploration and Mining Outcomes, Marksheider. Vestn., 2005, no. 3.
GEOMECHANICAL ASSESSMENT OF COMBINATION GEOTECHNOLOGY
FOR THICK FLAT-DIPPING ORE BODIES
A. A. Neverov
The developed technology for thick and very thick flat-dipping ore body mining combines a number of mining methods using various ground control techniques. The regular patterns of stress distribution in the geotechnology elements are found. Analysis of rock mass stability yields the safe application range for the proposed geotechnology.
Mining method, process layouts, rock mass, stress–strain state, longwall undercutting, temporal pillars, ore overhang, roof, stabiluty, mine safety
REFERENCES
1. Borschch-Komponiets, V.I. and Makarov, A.B., Gornoe davlenie pri otrabotke moshchnykh pologikh rudnykh zalezhei (Rock Pressure in Mining Thick Gently-Dipping Ore Bodies), Moscow: Nedra, 1986.
2. Bronnikov, D.N., Zamesov, N.F., and Bogdanov G. I., Razrabotka rud na bol’shilh glubinakh (Deep Level Ore Mining), Moscow: Nedra, 1982.
3. Freidin, A.M., Neverov, A.A., Neverov, A.S., and Filippov, P.A., Sovremennye sposoby razrabotki rudnykh zalehei s obrusheniem na bol’shikh grubinakh (Modernd Deep Level Ore Mining Methods with Caving), Novosibirsk: SO RAN, 2008.
4. Neverov, A.A., Geomechanical Substantiation of Modified Room-Work in Flat Thick Deposits with Ore Drawing under Overhang, Journal of Mining Science, 2012, vol. 48, n. 6, pp. 1016–1024.
5. Zienkiewicz, O.C., The Finite Element Method in Engineering Science, McGraw Hill, 1971.
6. Nazarova, L.A., Fredin, AA.M., and Neverov, A.A., Chamber Mining with Roof Caving at the Nikolaevsk Mine, Journal of Mining Science, 2005, vol. 41, no. 4, pp. 342–349.
7. Neverov, S.A. and Neverov, A.A., Geomechanical Assessment of Ore Drawpoint Stability in Mining with Caving, Journal of Mining Science, 2013, vol. 49, no. 2, 265–272.
8. Neverov, S.A., Types of the Orebodies on the Basis of the Occurrence Depth and the Stress State.
Part II: Orebody Tectonotypes and Geomedium Models, Journal of Mining Science, 2012, vol. 48,
no. 3, pp. 421–428.
9. Litvinsky G. G., Analiticheskaya teoriya prochnosti gornykh porod i massivov (Analytical Theory of Strength of Rocks and Rock Masses), Donetsk: Nord-Press, 2008.
10. Boltengagen, I.L., Koren’kov, E.N., Popov, S.N., and Freidin, A.M., Geomechanica Substantiation of the Parameters of a Continuous Chamber System of Mining with Caving of the Roof Rock, Journal of Mining Science, 1997, vol. 33, no. 1, 55–63.
11. Kazikaev, D.M., Geomekhanika podzemnoi razrabotki rud: uchebnik dlya vuzov (Geomechanics of Underground Ore Mining: College Textbook), Moscow: MGU, 2005.
MINE AEROGASDYNAMICS
ASSESSMENT OF EMERGENCIES IN RETURN AIR SYSTEM DESIGN
B. P. Kazakov, A. V. Shalimov, and N. A. Trushkova
The upside potential of an underground mine ventilation by return air systems is analyzed in the article. It is shown that subsidiary air supply depends on the ratio of the pressure head of a recirculating draught producer to the mine depression at the recirculating draught producer site. By calculation of the actual example, the authors prove that air leaks can cause emergencies due to drastic reduction of fresh air supply in working areas.
Depression, recirculation, vent cross cut, critical concentration, aerodynamic resistance, head characteristic, underground mines
REFERENCES
1. Krasnoshtein, À. Å., Kazakov, B.P., and Shalimov, À.V., Modeling Non-Stationary Gas Admixture Flow in Excavations under Recirculating Airing, Journal of Mining Science, 2006, no. 1, pp. 85–90.
2. Levin, L.Yu. and Kruglov, Yu.V., Study on the Recirculating Method of Ventilation in Potash Mines and Its Economical Efficiency, Gorn. Inform.-Analit. Bull., 2008, no. 10.
3. Edinye pravila bezopasnosti pri razrabotke rudnykh, nerudnykh i rossypnykh mestorozhdeniy poleznykh iskopaemykh podzemnym sposobom (Unified Safety Regulations for the Development of Ore, Barren, and Placer mineral Deposits by the Underground Mining Method), PB 03–553–03, Ìoscow: Gosgortekhnadzor Rossii, 2003.
4. Kazakov, B.P. and Shalimov, À.V., Characteristics of Air Induction Process Modelling based on Energy Conservation Laws and the Quantity of Excavation Movement, Izv. Vuzov, Gorny Zh., 2006, no. 2.
5. Kazakov, B.P., Shalimov, À.V., and Kiryakov, À.S., Energy-Saving Mine Ventilation, Journal of Mining Science, 2013, no. 3, pp. 475–481.
6. Protasenya, I.V., Beresnev, S.P., Kruglov, Yu.V., Grishin, Å.L., and Kiryakov, À.S., The Unified Information Analysis System AeroSet for the Design and Calculation of Ventilation in Potash Mines, Gorny Zh., 2010, no. 8.
7. Krasnoshtein, À. Å., Kazakov, B.P., and Shalimov, À.V., Modeling Complex Air–Gas–Heat Dynamic Processes in a Mine, Journal of Mining Science, 2008, no. 6.
8. The development of the system of multiple use of outgoing air streams and other nonconventional energy sources for the upgrading of ventilation and climatic parameters in Belarsukali Mine-4: the report on the research work, Perm; Soligorsk, 2002–2004.
9. The research of the ventilation system in Belarsukali Mine-4 with the development of recommendations and engineering solutions aimed at heat and electric energy saving: the report on the research work, Perm; Soligorsk, 2004–2005.
GEOINFORMATION SCIENCE
CLOUD TECHNOLOGIES IN MINING GEOINFORMATION SCIENCE
I. V. Bychkov, V. N. Oparin, and V. P. Potapov
The article discusses a new approach to implementation of the geoinformation environment for the mining geoinformation science problem solution using cloud technologies. In focus are the types of the cloud service as applied to the distributed geomonitoring networking for the wider range problem handling in mining. The authors describe specific structures of software support of the offered approach and exemplify problem solution in various spheres of mining geoinformation science.
Mining geoinformation science problems, cloud technologies, monitoring systems, geomechanical–geodynamic safety, ecology, seismic events
REFERENCES
1. Trubetskoy, Ê.N., The Development of Mining Sciences and Problems of Training of Engineering Skills in the Area of Resource Development, Marksheid. Nedropol’z., 2009, no. 6.
2. Oparin, V.N., Potapov, V.P., Popov, S.Å., Zamaraev, R.Yu., and Kharlampenkov, I.Å., Development of Distributed Gis Capacities to Monitor Migration of Seismic Events, Journal of Mining Science, 2010, no. 6, 666–671.
3. Potapov, V.P., Oparin, V.N., Logov, À.B., Zamaraev, R.Yu., and Popov, S.Å., Regional Geomechanical–Geodynamic Control Geoinformation System with Entropy Analysis of Seismic Events (in Terms of Kuzbass), Journal of Mining Science, 2013, no. 3, pp. 482–488.
4. Destruktsiya zemnoy kory i protsessy samoorganizatsii v oblastyakh sil’nogo tekhnogennogo vozdeystviya (The Earth’s Crust Destruction and Self-Organization Processes in the Area of Severe Technogenic Impact), Novosibirsk: SO RAN, 2012.
5. Potapov, V.P., Matematicheskoe i informatsionnoe modelirovanie geosistem ugol’nykh predpriyatiy (Mathematical and Information Modeling of Coal-Mine Venture Geosystems), Novosibirsk: SO RAN, 1999.
6. Oparin, V.N., Bagaev, S.N., Malovichko, À.À., et al., Metody i sistemy seysmodeformatsionnogo monitoringa tekhnogennykh zemletryaseniy i gornykh udarov (Methods and Systems of Seismodeformational Monitoring of Induced Earthquakes and Rock Bursts), vol. 1, Novosibirsk: SO RAN, 2009.
7. Oparin, V.N., Bagaev, S.N., Malovichko, À.À., et al., Metody i sistemy seysmodeformatsionnogo monitoringa tekhnogennykh zemletryaseniy i gornykh udarov (Methods and Systems of Seismodeformational Monitoring of Induced Earthquakes and Rock Bursts), vol. 2, Novosibirsk: SO RAN, 2010.
8. OnLine Maps with API and WebService. Ed prof. Michael Peterson, Springer, New York, Heidelberg, 2012.
9. April J. Wells, Grid Applications System Design, Aerbach Publications, New York, 2008.
10. Fayez, Gebali, Algorithm and Parallel Computing, A John Willey &Sons, Inc., Publition, New Jersy, 2011.
11. Massino Cafaro, Giovanni Alliso (Eds). Grids, Clouds and Virtualization, Springer, London, New York, 2011.
12. Raymond Yee. Pro Web 2.0 Mashups: Remixing data and Web service, Ed. Matthew Moodie, Springer–Verlag, New–York, 2008.
13. Adushkin, V.V. and Oparin, V.N., From the Alternating–Sign Explosion Response of Rocks to the Pendulum Waves in Stressed Geomedia. Part I., Journal of Mining Science, 2012, no. 2, pp. 203–222.
14. Adushkin, V.V. and Oparin, V.N., From the Alternating–Sign Explosion Response of Rocks to the Pendulum Waves in Stressed Geomedia. Part II, Journal of Mining Science, 2013, no. 2, pp. 175–209.
15. Oparin, V.N., Sashurin, À.D., Kulakov, G.I., et al., Sovremennaya geodinamika massiva gornykh porod verkhney chasti litosfery: istoki, parametry, vozdeystvie na ob’ekty nedropol’zovaniya (Present-Day Geodynamics of Rock Mass of the Upper Part of Rock Sphere: Origins, Parameters, Affect on Objects of Subsoil Management), Novosibirsk: SO RAN, 2008.
16. Oparin, V.N., Methodological Foundations of Developing Multilayered Monitoring Systems of Geomechanical–Geodynamic Safety for Mining Regions in Tectonically Active Areas, Proceedings of 6th Int. Conf.: Problems and Ways of Innovation Development of Mining Industry, Almaty, 2013.
17. Kurlenya, Ì.V., Oparin, V.N., and Vostrikov, V.I., The Formation of Elastic Wave Trains while Impulsive Excitation of Block Media. Waves of Pendular Type U?, Dokl. Akad. Nauk, 1993, vol. 333, no. 4.
18. Kurlenya, Ì.V. and Oparin, V.N., Problems of Nonlinear Geomechanics. Part II, Journal of Mining Science, 2000, no. 4, pp. 305–326.
19. Aleksandrova, N.I., Lektsii po teme Mayatnikovye volny v ramkakh kursa Nelineynaya geomekhanika (Lectures on the Topic Pendulum Waves within the Course Nonlinear Geomechanics), Novosibirsk: IGD SO RAN, 2012.
20. Sadovsky, V.M., Sadovskaya, Î.V., and Varygina, Ì.P., Mathematical Modeling of Pendulum Waves Using High-Capacity Calculations, Proceedings of 2nd Russian–Chinese Conf. Nonlinear Geomechanical–Geodynamical Processes in Deep Mining, Novosibirsk: IGD SO RAN, 2012.
21. Oparin, V.N., Annin, B.D., Chugui, Yu.V., et al., Metody i izmeritel’nye pribory dlya modelirovaniya i naturnykh issledovaniy nelineynykh deformatsionno-volnovykh protsessov v blochnykh massivakh porod (Methods and Measuring Devices for Modeling and Field Observation of Nonlinear Strain Wave Processes in Block Rock Mass), Novosibirsk: SO RAN, 2007.
22. Kurlenya, Ì.V., Oparin, V.N., and Eremenko, À. À., Mine Seismological Information Scanning Method, Dokl. Akad. Nauk, 1993, vol. 333, no. 6.
23. Oparin, V.N., Usol’tseva, Î.Ì., Semenov, V.N., and Tsoi, P.À., Evolution of Stress–Strain State in Structured Rock Specimens under Uniaxial Loading, Journal of Mining Science, 2013, no. 5, pp. 677–690.
MINING ECOLOGY
SATELLITE MONITORING OF VEGETATION MANTLE RESPONSE TO THE SORSK COPPER–MOLYBDENUM DEPOSIT IMPACT
G. V. Kalabin, V. I. Gorny, and S. G. Kritsuk
The timely character of the digital space data utilization for regional and local day-to-day assessment of the environmental situation in the area of surface / underground mines and processing plants is proved. The natural environment situation is analyzed in terms of the Sorsky copper–molybdenum opencast mine (Republic of Khakasia, Russia).
Mining industry, industrial impact, vegetation, satellite, vegetation index, response
REFERENCES
1. Kalabin, G.V., Standardization of General Layouts of Open Pit Mines and Evaluation of Their Ecological Properties, Marksheider. Nedropol’z., 2012, no. 3.
2. Pokalov, V.T., Geologicheskie osnovy poiskov i otsenki endogennykh mestorozhdenii molibdena (Geological Basis of Search and Appraisal of Endogenous Molybdenum Deposits), Moscow: Nedra, 1983.
3. www.sorsk-adm.ru
4. Prirodnye resursy i ekologiya Rossii. Federal’nyi atlas (Natural Resources and Ecology of Russia. Federal Atlas), Moscow: NIA Prirod. Resurs., 2002.
5. Glazovskaya, M.A., Problems and Methods of Evaluating Ecology Stability of Soil and Soil Cover Relative to Industrial Impact, Pochvoved., 1999, no. 1.
6. Azarova, S.V., Mine Waste and the Integrated Evaluation of Their Environmental Hazard (In Terms of Republic of Khakasia), Theses of Dr. Geology and Mineralogy Dissertation, Tomsk, 2005.
7. Kapustina, Yu. And Butenko, A., Industy-Generation Formation in Soil and Spray Dust in the Area of Sorsk Copper–Molybdenum Deposit, Proc. 17th Student Conf. Ecology in Russia and the Adjacent Territory, Novosibirsk, 2012.
8. Gosudarstvenny doklad o sostoyanii okruzhayushchei sredy Respubliki Khakasiya v 2010 godu (Governmental Report on the Environment Condition in Republic of Khakasia in 2010), Abakan, 2011.
9. Beletsky, S. (Ed.), Malaya gornaya entsiklopediya (Small Mining Encyclopedia), Moscow:
Donbass, 2004.
10. http://ladsweb.nascom.nasa.gov/data/
11. http://www.cgiar-csi.org/data/elevation/item/45-srtm-90m-digital-elevation-database-v41
12. http://terranorte.iki.rssi.ru/onlinegis/html/viewer.php?q=1
13. Kalabin, G.V., Quantitative Assessment Procedure for Environmental Conditions in the Mining and Processing Industry Areas, Journal of Mining Science, 2012, vol. 48, no. 2, pp. 382–389.
MINERAL DRESSING
MECHANISMS OF NONSULFIDE MINERAL FLOTATION WITH OLEINIC ACID
V. A. Chanturia and S. A. Kondrat’ev, and E. D. Shepeta
By the analysis of oleinic acid flotation of fluorite and hematite, it is inconsistent to use thermodynamic approach to explain the flotation effect by the chemical adsorption of the reagent only. The authors propose a hypothesis that collecting ability of a flotation reagent relates with the activity of its physical adsorption at the air–liquid interface. The hypothesis is supported with the data on flotation of rutile, zircon and fluorite. Capability of surface pressure of film generated by molecules or ion–molecule associates as the criterion of collecting ability of a flotation agent is defined.
Flotation, oxyhydryl reagent, physical adsorption and chemical adsorption, surface pressure, collecting ability
REFERENCES
1. Kakovsky, I.A., Anion Collectors in Flotation, Rol’ gazov i reagentov v protsessakh flotastii (Role of Gases and Reagents in Flotation), Moscow: AN SSSR, 1950.
2. Abramov, A.A. and Magazanik, D.V., Mechanisms of Flotation and Depression of Fluorite, Tsvet. Metally, 2000, no. 9.
3. Bogdanov, O.S., Maksimov, I.I., Podenk, A.K., and Yanis, N.A., Teoriya i tekhnologiya flotatsii rud (Theory and Technology of Ore Flotation), Moscow: Nedra, 1980.
4. Grebnev, A.N. and Stefanovskaya, L.K., Interconnection of Physical Structure and Physicochemical and Flotation Properties of Alkyl Sulfates, Sovremennoe sostoyanie i zadachi selectivnoi flotatsii rud (State-of-the-Art and Goals of Selective Ore Flotation), Moscow: Nauka, 1967.
5. Sorokin, M.M., Flotatsionnye metody obogashcheniya. Khimicheskie osnovy flotastii (Flotation Methods of Beneficiation. Chemical Basis of Flotation), Moscow: MISiS Publisher, 2011.
6. Kulkarni, R.D. and Somasundaran, P., Kinetics of Oleate Adsorption at the Liquid/Air Interface and Its Role in Hematite Flotation, Symposium Series, AIChE, 1975, vol. 71, no. 150.
7. Kulkarni, R.D. and Somasundaran, P., Flotation Chemistry of Hematite/Oleat System, Colloids and Surfaces, 1980, vol. 1, nos. 3 and 4.
8. Abramov, A.A., Teoreticheskie osnovy optimizatsii selektivnoi flotatsii sul’fidnykh rud (Theoretical Basis of Optimizing Selective Ore Flotation), Moscow: Nedra, 1978.
9. Kondrat’ev, S.A., Estimate of Flotation Activity of Collecting Reagents, Obog. Rud, 2010, no. 4.
10. Chanturia, V.A. and Shafeev, R.Sh., Khimiya poverkhnostnykh yavlenii pri flotatsii (Chemistry of the Surface Phenomena in Flotation), Moscow: Nedra, 1977.
11. Plaksin, I.N., Shafeev, R.Sh., and Chanturia, V.A., Vliyanie geterogennosti poverkhnosti mineralov na vzaimodeistvie s flotastionnymi reagentami (Effect of the Mineral Surface Heterogeneity on the Mineral Interaction with the Flotation Reagents), Moscow: Nauka, 1965.
12. Hosten, C., Micro-Floatability of Rutile and Zircon with Soap and Amine Type Collectors, Physicochemical Problems of Mineral Processing, 2001, vol. 35.
13. Marinakis, K.I. and Shergold, H.L., The Mechanism of Fatty Acid Adsorption in the Presence of Fluorite, Calcite and Barite, International Journal of Mineral Processing, 1985, vol. 14, issue 3.
14. Fat’yanov, A.V., Nikitina, L.G., and Glotova, E.V., Tekhnologiya obogashcheniya fluoritovykh rud (Processing Technology for Fluorite Ore), Novosibirsk: Nauka, 2006.
15. Abramov, A.A., Requirements for the Assortment and Creation of Collecting Reagents. Part II: Requirements for he Physicochemical Properties of a Selective Collector, Tsvet. Metally, 2012, no. 5.
16. Pankratova, A.I., Properties of Monomolecular Layers on Salt Solutions, Zh. Fiz. Khim., 1938, vol. 12, nos. 5 and 6.
PRODUCTIVITY OF CHEMICAL–ELECTROCHEMICAL GOLD LEACHING
FROM REBELLIOUS ORE
A. L. Samusev and V. G. Minenko
The authors describe experimental research findings on chemical–electrochemical leaching of gold from rebellious minerals. A laboratory-scale plant has been designed for studying the leaching kinetics. Rational parameters of chemical–electrochemical leaching are specified (duration of the process, electrode current density, NaCl concentration). The researchers analyze the changed microstructure and phase composition of arsenopyrite surface after the leaching and substantiate the leaching improving practices.
Rebellious gold-bearing ore, arsenopyrite, chlorine, hypochlorite, electrochemical leaching, sodium chlorite
REFERENCES
1. Chanturia, V.A., Bunin, I.Zh, Lunin, V.D., Sedel’nikova, G.V., and Krylova, G.S., Noncnventional Methods of Unlocking of the Rebellious Gold Ore and Its Concentration Products, Podzemnoe i kuchnoe vyshchelachivanie urana, zolota i drugikh metallov (Underground and Heap Leaching of Uranium, Gold and Other Metals), Volume II: Gold, Fazlulin, M.I. (Ed.), Moscow: Ruda Metally, 2005.
2. Chekushina, T.V., Heap Electrochemical Leaching of Gold, Podzemnoe i kuchnoe vyshchelachivanie urana, zolota i drugikh metallov (Underground and Heap Leaching of Uranium, Gold and Other Metals), Volume II: Gold, Fazlulin, M.I. (Ed.), Moscow: Ruda Metally, 2005.
3. Zyryanov, M.N. and Leonov, S.B., Khloridnaya metallurgiya zolota (Chloride Metallurgy of Gold), Moscow: Intermet Engineering, 1997.
4. Chanturia, V.A., Electrochemical Technology in Beneficiation and Hydrometallurgical Processes, Fiziko-tekhnicheskie problem razrabotki mestorozhdenii poleznykh iskopaemykh (Physico-Technical Problems of Mineral Mining), Moscow: IPKON AN SSSR, 1983.
5. Teut, A.O., Kuimov, D.V., and Kos’yanov, E.A., Gold Recovery from the Rebellious Sulfide Ore
by the Method of Electrochlorination, Proc. Int.. Conf. New Dressing and Processing Technologies
for the Rebellious Natural Minerals and Mine Waste Material (Plaksin’s Lectures–2011), Verkhnyaya Pyshma, 2011.
6. Belevantsev, V.I. and Peshevitsky, B.I., Issledovanie slozhnykh ravnovesii v rastvore (Analysis of Combined Equilibriums in Solutions), Novosibirsk: Nauka, 1978.
7. Dvoichenkova, G.P., Minenko, V.G., Pis’menny, A.V., Zyryanov, I.V., and Ostrovskaya, G.Kh., Ecologically Safe Method of Processing and Disposal of Salt Recycled Water from tailings at Processing Plants of ALROSA Co., Gorny Zh., 2011, no. 1.
SELECTIVE FLOTATION OF FINE-INGRAINED CARBONATE–FLUORITE ORE IN PULP OF INCREASED DISPERSION UNIFORMITY
L. A. Kienko and O. V. Voronova
The studies into the fine-ingrained high-carbonate fluorite ore concentration show that increasing of pulp dispersion uniformity results in higher selectivity of flotation. The researchers find out availability of quality fluorite concentrate in processing of low-grade ore with carbonate index less than 1 CaF2 recovery up to 70%.
Flotation, fluorite, calcite, carbonate index, fine-ingrained particles, slurry
REFERENCES
1. Klassen, V.I., Nedogorov, D.I., and Deberdeev, I.Kh., Shlamy vo flotatsionnom protsesse (Slimes in Flotation), Moscow: Nedra, 1969.
2. Rulev, N.N. and Dukhin, S.S., Effect of Particle Size on Flotation Performance, Kolloid Zh., 1984, v
ol. 46, no. 4.
3. Pushkareva, V.P., Development and Validation of Methodology for Flotation Performance Evaluation for Coal with Higher Content of Fine Particles, Dr. Tech. Sci. Dissertation, Lyubertsy, 2005.
4. Beloborodov, V.I., Andronov, G.P., Zakharova, I.B., Filimonova, N.M., and Berman, I.S., Apatite–Shtaffelite Ore Flotation Using Selective Flocculation Technology for Slime, Obog. Rud, 2004, no. 6.
5. Aliferova, S.N., Activating Flotation of Slimes and Sylvite in Potash Ore Dressing, Cand. Tech. Sci. Dissertation, Ekaterinburg, 2007.
6. Vigdergauz, V.E., Shrader, E.A., Stepanov, S.A., Antonova, E.A., and Sarkisova, L.M., Flocculation of Sludges of Sulfide Minerals by a Hydrophobic Polymer, Journal of Mining Science, 2000, vol. 36,
no. 5, pp. 507–512.
7. Zimin, A.V., Bondarenko, V.P., and Zelensky, B.A., RF patent no. 2177370, Byull. Izobret., 2001, no. 36.
8. Rulev, N.N., RF patent no. № 2254170, Byull. Izobret., 2005, no. 17.
9. Barsky, L.A., Kononov, O.V., and Ratmirova, L.I., Selektivnaya flotatsia kal’tsiisoderzhashchikh mineralov (Selective Flotation of Calcium-Containing Minerals), Moscow: Nedra, 1979.
10. Kienko, L.A., Samatova, L.A., Voronova, O.V., and Kondrat’ev, S.A., Lower Temperature Flotation of Carbonate–Fluorite Ore, Journal of Mining Science, 2010, vol. 46, no. 3, pp. 317–323.
11. Kienko, L.A., Samatova, L.A., Voronova, O.V., and Chuyanov, G.G., Problems of Flotation of Carbonate–Fluorite Ore in the Voznesensk Ore Field in the Conditions of Water Rotation, Gorny Zh., 2010, no. 8.
NEW METHODS AND INSTRUMENTS IN MINING
COMPARATIVE ANALYSIS OF VARIOUS DECISION-MAKING METHODS
IN AUTOMATED GAS CONTROL
L. A. Avdeev and I. V. Breido
The actual safety regulations elide dynamics of air and gas conditions and their probabilistic nature, which results in underutilization of options of the advanced air and gas control in mines. The article proposes the decision-making using statistics filters, based on estimations of amplitude and duration of gas outbursts. The authors derive relations for calculating rational discrete intervals of explosimetric sensor sampling.
Pre-emergency, emergency and post-emergency control, technological environment, operating regimes, electric machinery, coal mine, data reading, processing and storage subsystems
REFERENCES
1. Avdeev, L.A. and Shil’nikova, A.A., Probabilistic Approach to Improving Perfomance of Automated Control and Protection, Trudy KarGTU, 2008, no. 4.
2. Avdeev, L.A., Comparative Analysis of Decision-Making Methods in Automated Gas Protection Systems in Mines, Avtomatika, Informatika, 2012, no. 2.
3. Bronshtein, I.N. and Semendyaev, K.A., Spravochnik po matematike dlya inzhenerov i uchashchikhsya vuzov (Reference on Mathematics for Engineers and Students), Moscow: Nauka, 1981.
4. Avdeev, L.A., Probabilistic Analysis of Operating Regimes of Automated Control Systems in Ore Mines, Trudy KarGTU, 2012, no. 1.
5. Levin, B.R., Teporeticheskie osnovy statisticheskoi radiotekhniki (Theoretical Science of Statistical Radiotechnics), Moscow: Sov. radio, 1968.
6. Sretenovich, B.R., Teporeticheskie osnovy statisticheskoi radiotekhniki (Theoretical Science of Statistical Radiotechnics), Moscow: Sov. radio, 1961.
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