"GEODYNAMICS AND STRESS STATE OF THE EARTH’S INTERIOR" — 2009
PROCEEDINGS OF THE ALL-RUSSIAN CONFERENCE «GEODYNAMICS AND STRESS STATE OF THE EARTH’S INTERIOR», DEDICATED TO THE MEMORY OF ACADEMICIAN EVGENY. I. SHEMYAKIN, with participation of foreign scientists
July 6 — 10, 2009, Novosibirsk
Volume 1. Modern Methods and Instrumentation for Control, Diagnostics, and Forecasting of the Stress-Strain State in Rock Masses
UDC 550.34; 622.831 QUASISTATISTICS AND DYNAMICS OF. A. ROCK MASS IN HIGHLY INDUSTRIALIZED REGIONS
V. N. Oparin and A. V. Leontiev
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The authors generalize the research data on regularities and parameters of the present-day geodynamic phenomena in rock masses in main mining areas in Russia, Integration Project of Siberian Branch, Russian Academy of Sciences No. 6.18.
UDC 550.348 : 681.787.7 SPECIFIC FEATURES OF THE CRUST STRAIN, MEASURED WITH. A. HIGH-SENCITIFITY LASER AT THE EVE OF. A. STRONG EARTHQUAKE
V. A. Orlov, S. V. Panov, M. D. Parushkin, and Yu.N. Fomin
Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The issues of geodynamic effect of a strong earthquake focus on strain processes in the earth crust are discussed. Processing and analyzing the data of the laser strain-graphic complex, operating at the mine gallery in the Baikal rift area, made it possible to obtain the new evidence in 2008. The unique case presented a good opportunity to watch the earthquake focus birth at distance of ~30 km, to discover new specific features and to confirm before-observed anomalies.
UDC 622.834 + 550.37 ELECTROCAPACITY-STRUCTURAL DIAGNOSTICS OF. A. FACE ROOF IN. A. COAL-ROCK MASS
V. L. Shkuratnik and V.Yu. Dagaev
Moscow State Mining University, Moscow, Russia
ABSTRACT: The physical argumentation, instrumentation and procedure for the electrocapacity-logging geomonitoring in the geological-structural diagnostics of a surrounding coal-rock mass to assess and maintain the stability of mine workings.
UDC 550.834 : 622.12 PREDICTION OF THE STRESS-STRAIN STATE OF ROCKS BY THE MINE IN-SEAM SEISMIC SURVEY
A. V. Antsiferov, M. G. Tirkel, A. A. Glukhov, and M. A. Pedchenko
Ukrainian Research Mining Institute, Ukrainian National Academy of Sciences, Donetsk, Ukraine
ABSTRACT: The seismic radioscopy employed to identify zones of higher rock pressure proves the applicability of this approach to contour anomaly zones in order to optimize the sequence of seam underworking.
UDC 550.344 ELECTROMECHANICAL PROCESSES IN ROCKS
V. S. Kuksenko and H. F. Makhmudov
Ioffe Physico-Technical Institute, Russian Academy of Sciences, Saint-Peterburg, Russia
ABSTRACT: The mechanical-electric effects were studied on specimens under elastic load in a neutral medium when specimens were weakly electrically polarized. It is established that weak electric fields applied to specimens tend to enhance or to weaken mechanical-electric effects depending on a direction of the field action.
UDC 550.348 ACOUSTIC-EMISSION MANIFESTATION OF. A. DISSIPATIVE STRUCTURE IN STRAINED ROCKS
B.Ts. Manzhikov and P. V. Il’ichev*
Institute of Geomechanics and Mineral Resource Development, National Academy of Sciences, Bishkek, Kyrgyzstan
*Scientific Station, Russian Academy of Sciences, Bishkek, Kyrgyzstan
ABSTRACT:The authors established multimodality of the spectral density of acoustic emission, accompanying the strain in rocks. It is assumed that the spectral density maximums for acoustic emission can be governed by natural vibrations of components of a dissipative structure, the said vibrations can be generated by stress relaxation in a loaded material.
UDC 622.012.3 INFLUENCE OF GEOMATERIAL PROPERTIES ON STABILITY OF MINE WORKINGS IN PERMAFROST ZONES
M. D. Novopashin, A. S. Kurilko, and V. I. Sleptsov
N. V. Chersky Institute of Mining of the North, Siberian branch, Russian Academy of Sciences, Yakutsk, Russia
ABSTRACT: The authors report research data on stability of pit walls and underground workings in permafrost zones. Variations in properties of rocks under the thermodeformation effect, geometry of workings and climate conditions are considered.
UDC 550.34 + 539.3 SYNCHRONIZATION OF VARIATIONS IN SEISMIC ACTIVITY IN THE NORTHERN TIEN SHAN WITH. A. MODE OF ELECTROMAGNETIC SOUNDING OF THE EARTH CRUST
V. N. Sychev, N. A. Sycheva, L. M. Bogomolov?, and B. V. Borovsky
Scientific Station, Russian Academy of Sciences, Bishkek, Kyrgyzstan
Institute of Marine Geology and Geophysics, Far East Branch, Russian Academy of Sciences, Yuzhno-Sakhalinsk, Russia
ABSTRACT: : Authors review the research results for the daily distribution of earthquakes, which were obtained from the data of digital telemetric network KNET in terms of influence of the electrosounding by powerful current sources (geophysical MHD-generators and electro-impulse systems) on weak seismicity. The research results allow better understanding of mechanisms for transformation of electric energy into elastic oscillations in a heterogeneous medium.
UDC 539.3 : 550.34.09 CONSTRUCTION OF THE DYNAMIC MODEL FOR EVOLUTION OF THE ROCK MASS STATE ON DATA OF THE DETAILED SEISMIC CATALOGUE
O. A. Khachai and O.Yu. Khachai*
Institute of Geophysics, Ural Branch, Russian Academy of Sciences, Ekaterinburg, Russia
*Ural State University named after A. M. Gorky, Ekaterinburg, Russia
ABSTRACT: The mine seismic information is analyzed in details in the context of synergetics and the theory of open dynamic systems. Regularities of the rock mass transition from the chaotic to ordered state and V. V. The physical statement of the problem on modeling anthropogenically induced motions of a rock mass is formulated.
UDC 622.831 FORECASTING OF DYNAMIC ROCK PRESSURE MANIFESTATIONS AT. A. COAL LONGWALL
M. Reuter, W. Kurfuerst, K. Mayrhofer, and Yu. Veksler
«MARCO Systemanalyse und Entwicklung GmbH», Dachau, Germany
ABSTRACT: The proposed methods for prediction of rockbursts are based on the analysis of the rock mass convergence and the assessment of the roof structure and higher rock pressure zones from the evaluated rock mass response to operation of a plough or a shearer at a longwall.
UDC 628.831 GEOMECHANICAL SUBSTANTIATION OF THE TOP-DOWN SLICE MINING OF SUB-PIT ORE RESERVES AT THE AIKHAL MINE
V. D. Baryshnikov and L. N. Gakhova
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The specific features of the stress-strain state evolution in a sub-pit rock mass in transition to the top-down slice mining of «Aikhal» kimberlite pipe are established from the numerical modeling data. Recommendations on disposition of a stope drift in layer No. 4 are given.
UDC 622.831 INVESTIGATION INTO DISPLACEMENTS OF. A. MINE WORKING BY THE METHOD OF THREE-PAIRS OF CONTOUR REFERENCE MARKS
V. A. Vaganova and G. I. Kulakov *
Tashtagol Mining Technical School, Tashtagol, the Kemero Region, Russia
* Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The authors present the research data on main strains at a rock drift, level -140 m, the Tashtagol Mine. The data were obtained by the method of three pairs of contour reference marks. It is demonstrated that orientation of principal tension and compression deformations undergoes appreciable changes during the stoping operation.
UDC 622.02 : 539.2 INVESTIGATION INTO THERMAL EMISSION FROM GEOMATERIAL SURFACES AT DIFFERENT STAGES OF DEFORMATION
V. I. Sheinin and D. I. Blokhin
N. M. Gersevanov Research Institute of Foundations and Underground Structures, affiliate of FGUPNITs «Construction», Moscow, Russia
ABSTRACT: Tests on detection of time variations in thermal radiation from geomaterial surface under monotonous loading in the conditions of uniaxial compression are reported. The test data provide the grounds to conclude that it is possible, in principle, to study regularities of the deformation evolution and the geomaterial failure by measuring variations in the intensity of the respective thermal radiation.
UDC 622.831 PROCEDURE FOR IDENTIFICATION OF POTENTIALLY DANGEROUS ZONES AT MINING AREAS AT THE VERKHNE-KAMSK POTASSIUM AND POTASSIUM-MAGNEZIUM SALT DEPOSIT AND SOME CASE STUDIES
S. A. Konstantinova, S. A. Chernopazov, and M. V. Gilev*
Ural Research and Design Institute of Mineral Salt Production, Perm, Russia
*OAO «Sylvinite,» Solikamsk, Russia
ABSTRACT: The authors explicate fundamentals of the procedure for estimation of geodynamic safety of underground mineral resources and the daylight surface on the basis of mathematical modeling of chamber mining by using MCE-software packages, where the non-linear hierarchic model of deformation and failure of mineral salt rocks is implemented. The procedure is worked out on the base of the retrospective analysis of causes, resulted in negative events at the Second Solikamsk Mine and the First Bereznikovsk Mine.
UDC 622.831 : 681.3 : 512.2 SEASONAL EFFECT ON THE ELECTROMAGNETIC BACKGROUND AT UNDERGROUND MINE WORKINGS
V. A. Vaganova and G. I. Kulakov*
Tashtagol Mining Technical School, Tashtagol, the Kemerovo Region, Russia
*Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The research data on the background electromagnetic radiation of rock masses at underground mine workings in the Gornaya Shoria are discussed. It is established that the radiation intensity in winter is higher than that in summer. December is distinguished for abnormal variations in the electromagnetic background.
UDC 622.831 DEFORMATION AND ACOUSTO-EMISSION INVESTIGATION OF HARD BED-ROCK PROPERTIES IN URBAN HIGH-RISE BUILDING CONSTRUCTION
A. S. Voznesensky, A. M. Mukhamedshin*, D. A. Naryshkin, and M. N. Tavostin**
Moscow State Mining University, Moscow, Russia
*OOO «AMiK-Innovation Technologies» Ekaterinburg, Russia
**OOO «Podzemgasprom,» Moscow, Russia
ABSTRACT:The deformation characteristics of hard rock specimens are investigated. Deformation, load and acoustic emission were recorded in the tests of specimens. It is shown that spectra of the acoustic-emission signals at the loaded area differ from those in the other sections of the deformation curve.
UDC 622.831 : 539.3 DEFORMATION OF PIECEWISE-HOMOGENEOUS ROCK BLOCKS AND PILLARS
A. A. Karsnovsky and V. E. Mirenkov
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: Under consideration are redetermined rock mechanical problems, dealing with deformation of pillars and rock blocks. The field data on displacements of the pillar boundary sections, being outside the contact area, give a rise of redetermination. The integral equation systems for stresses within zones of the «pillar-host rocks» contact are derived. The mathematical modeling results on deformation of a multicomponent pillar or a block boundary are presented.
UDC 622.831 : 681.5.08 METHODS FOR DETERMINATION AND IDENTIFICATION OF ACOUSTIC EMISSION SOURCES WITHIN. A. MINED ROCK MASS BY USING GEOMECHANICAL MONITORING DATA
G. A. Kalinov, I. Yu. Rasskazov, D. S. Migunov, and K. O. Kharitonov*
Mining Institute of the Far-Eastern Branch, Russian Academy of Sciences, Khabarovsk, Russia
*Pacific Ocean State Institute, Khabarovsk, Russia
ABSTRACT: The authors consider the algorithms for determination and identification of the acoustic emission sources, which were implemented in the digital geoacoustic system to monitor the rock pressure «Prognoz ADS». Energy parameter MARSE is used to register acoustic impulses, and the stepwise filtration by static methods is employed to identify signals of the natural acoustic emission.
UDC 622.2 : 528.061.4 EFFECT OF MOVABLE GRAVITATING MASSES ON THE ROCK-MASS MOTION MONITORING DATA
B. T. Mazurov and O. I. Nekrasova
Siberian State Geodetic Academy, Novosibirsk, Russia
ABSTRACT: The computed experimental data on evaluation of influence of a gravitating truncated-cone-shaped mass on rock mass motions are presented. Special attention is paid to the necessity to account for this effect in field measurements and to interpret the regular in-situ observation data.
UDC 534.874 INSTRUMENTS FOR MONITORING OF ACOUSTIC SIGNALS EMITTED BY AN AIR HAMMER MOVING IN THE SOIL
E. V. Denisova, A. I. Konurin,* and K. S. Polin*
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
*Novosibirsk State Technical University, Novosibirsk, Russia
ABSTRACT: The tools to identify location of a hammer, moving in the soil are considered. The detector block-diagram and the piezoelectric gauge design are presented. The software to process an acoustic signal, emitted by a moving-in-the-soil air hammer, is proposed.
UDC 622.281.4 : 693.547.3 THE EFFECT OF MOISTURUE TRANSFER ON FORMATION OF HETEROGENEOUS STRESS-STRAIN STATE IN ROCKS AROUND. A. MINE WORKING IN. A. PERMAFROST ZONE
V. I. Popov
N. V. Chersky Mining Institute of the North, Siberian Branch, Russian Academy of Sciences, Yakutsk, Russia
ABSTRACT: The mathematic model of the «ice-rock» formation around a rectangular-shaped mine working is proposed. The SSS in rocks is formed under effect of the heat exchange between a ventilation flux, specified by alternating temperature, and a mass transfer within a rock mass. The elastic stress-strain state of the near-contour zone of a mine working is induced by an increased water volume in its phase transformation into ice, and is considered in terms of unrelated problems.
UDC 622.831 SPECIFIC FEATURES OF EVOLUTION OF ELECTROMAGNETIC RADIATION SIGNAL STRUCTURE AT DIFFERENT STAGES OF ROCK LOADING
G. E. Yakovitskaya, A. G. Vostretsov,* A. V. Krivetsky,* A. A. Bizyaev,* and A.Yu. Karpov**
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
* Novosibirsk State Technical University, Novosibirsk, Russia
**The State Fire Inspection Department, Ministry of Emergency of the Russian Federation, Novosibirsk
ABSTRACT: The laboratory research data on the electromagnetic radiation of loaded rock specimens with synchronous registration of EMR signals and loads are discussed.
UDC 550.34 + 539.3 + 551.24 SEISMIC AND GPS DATA ON GEODYNAMIC PROCESSES AND DESTRUCTION OF THE EARTH’S CRUST IN THE TIEN SHAN REGION
N. A. Sycheva, L. M. Bogomolov*, V. N. Sychev, and A. D. Kostyuk
Scientific Station, Russian Academy of Sciences, Bishkek, Kyrgyzstan
*Institute of Marine Geology and Geophysics, Far-Eastern Branch, Russian Academy of Sciences, Yuzhno-Sakhalinsk, Russia
ABSTRACT: Based on the Seismic Event Catalogue, KNET network (more than 6000 events), and GPS-data, the strain intensities were calculated and distribution in the territory, confined by coordinates 40.5–43.5° north latitude and 72.0–78.0° East longitude was mapped. The maximum intensity level was evaluated: ~10-8 year-1 (from seismic data) and ~10-7 year-1 (from GPS-data). Both approaches made it possible to identify the same higher strain intensity zones.
Volume 2. Geodynamic Fields and Processes Induced by Anthropogenic Activities. Rock Mass Models and Methods for their Identification
UDC 539.37 MODELING OF. A. GEOMATERIAL FLOW IN. A. CONVERGENT CHANNEL IN TERMS OF NON-ARCHIMEDIAN MATHEMATICAL ANALYSIS METHODS
S. V. Lavrikov, O. A. Mikenina, and A. F. Revuzhenko
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The geomaterial flow in a convergent channel is considered in the terms of mathematical models of a medium, exhibiting the hierarchy of structural levels. The non-Archimedian analytical methods are used to formulate a closed geomedium model with two scale levels. The microlevel model considers the block medium structure and the interblock slipping under the non-linear law. The finite element algorithm and a software worked out allows that the plane boundary deformation problems can be solved. The numerical solutions to the problem on a geomaterial flow in a convergent radial flow are obtained. The medium deformation patterns at different parameters are presented.
UDC 622.011 : 539.3 KINETIC ROCK FRACTURING MODEL
V. I. Miroshnikov and B. G. Saksin
Mining Institute, Far Eastern Branch, Russian Academy of Sciences, Khabarovsk, Russia
ABSTRACT: The model of an anisotropic fissured material is proposed. Kinetics of thermofluctuation processes of plastic deformation and fracturing in rock components is described. Kinetic factors of viscous-plastic and brittle-fractured deformation are functions of temperature, average pressure and stress deviator intensity.
UDC 622.323 SPECIFIC FEATURES OF THE STRESS-STRAIN STATE OF THE FORMATION IN THE VICINITY OF AN INCLINED WORKING AND. A. VERTICAL BOREHOLE
V.Ya. Rudyak and A. V. Seryakov
Russian Scientific Centre of Baker Hughes B. V., Novosibirsk, Russia
ABSTRACT: The algorithm and software package is proposed to model the static stress state and the threshold pressure in the formation around a borehole, a mine working, and a quarry. The researchers established specific features of stress distribution and pore pressure within a heterogeneous formation in the vicinity of an inclined access and a vertical borehole.
UDC 539.3 : 550.34.09 CALCUALTION ALGORYTHM FOR THE STRESS TENSOR COMPONENTS IN THE MODEL EXHIBITING. A. LOCAL HETEROGENEITY OF ARBITRARY GEOMETRY
O. A. Khachai and A.Yu. Khachai*
Institute of Geophysics, Ural Branch, Russian Academy of Sciences, Ekaterinburg, Russia
*A. M. Gorky Ural State University, Ekaterinburg, Russia
ABSTRACT: The calculation algorithm for the stress tensor components is proposed on the basis of the solution to 2D elastic dynamic problem for a model exhibiting a local heterogeneity of arbitrary geometry. The algorithm allows that the stress distribution and displacements of a laminar medium with arbitrary location of artificial electromagnetic or seismic field sources can be calculated.
UDC 622.257 ANALYSIS OF RESERVOIRS SEEPAGE FLOW AND PIPE FLOW COUPLING
AND WELL STABILITY
WANG Xian-jun, LV Xiang-feng*
College of Architecture and Engineering, Liaoning Technical University, Liaoning, Fuxin, China
*Institute of Poromechanics, Wuhan Polytechnic University, Hubei, Wuhan, China
ABSTRACT: In order to realize full coupling simulate analysis of reservoirs seepage and perforation pipeline. The numerical model of flow and solid coupling in reservoir under stress is set up, by combining knowledge of fluid mechanics in porous medium and fluid-solid coupling theory. According to the hydrokinetics pipe flow theory, and using Navier-Stokes equation to simulate the fluid motion in the well casing and perforation, four systems of partial differential equations are resolved with unity coupling, with adoption of COMSOL Multiphysic, a multi-physical quantity coupling analyzing software, to simulate and analyze the set-up model numerically. The study of researching the simulating result shows that the pressure drop and strain are biggest at the perforation and the flow-rate at the perforation and well casing are bigger than in reservoirs, expectant purpose cannot come at injecting for driving oil and gas. The simulating result proves that the set-up model and solution are effective.
UDC 622.257 NUMERICAL SIMULATION OF PSEUDO-STEADY ADSORPTION-MOBILIZATION OF COALBED METHANE
ZHANG Xiao-ying, LV Xiang-feng*
Liaoning Technical University, College of Science, Liaoning, Fuxin, China
*Wuhan Polytechnic University, Institute of Poromechanics, Hubei, Wuhan, China
ABSTRACT: Considering the migration process of coalbed and its complex of methane in reservoir, high order nonlinear partial differential equations are adopted to describe the migration of coalbed methane. To solve the problem better, the article adopts the COMSOL Multiphysic commercial numerical simulating software to solve the set-up non-steady model by simulating. The results show that dynamic curve of pressure and density simulated by the software is accord with practice. At the same time, process of pressure drop can be simulated by dynamic visual module. So the software has pretty good use and scientific research value in the coalbed methane simulation.
UDC 539.3 SAFE STRESS IN. S. N. ZHURKOV’S STRENGTH CONCEPTION
V. P. Efimov
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The proposed process for evaluation of a safe stress is based on the process of the thermal displacement in a model, specified by a fixed broken-link state.
UDC 622.121.54 WAVE GEOMECHANICAL PROCESSES IN METHANE-CONTENT DYNAMICS AT. A. MINING AREA
G.Ya. Polevshchikov
Institute of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, Kemerovo, Russia
ABSTRACT:The proposed approach to evaluation of the gas-content structure of a coal-methane seam in technogenically induced stress zones takes into account the solved, sorbed and free forms of methane content. The cited field observation data indicate the wavelike character of the evolution of geomechanical process at an undermined coal seam.
UDC 622.831 EVALUATION OF NATURAL AND TECHNOGENIC EFFECTS ON THE BLOCK MASS MOTIONS AT THE TASHTAGOL DEPOSIT
T. V. Lobanova and E. V. Vasilieva**
OAO «VostNIGRI», Novokuznetsk, Russia
* Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The GPS-observation data on Earth’s surface displacement out and in the zone of the mining impact at the Tashtagol iron ore deposit, characterized by block structure, are reported. Specific features of motions under influence of natural and technogenic processes are established.
UDC 539.376 LOSS OF THE PITWALL AND MINE WORKING STABILITY UNDER CREEP CONDITIONS
A. M. Kovrizhnykh
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT:The long-term strength criterion, based on the maximum shear stress, was employed to evaluate the upper and lower time limits for the pit wall failure for the plane deformation of a stiff-creeping body. The scheme of an elastic-creeping body was used to solve problems of the creep strain evaluation, initial and complete failure of circular cylindrical workings, supports and a spherical cavity under the hydrostatic rock pressure.
UDC 622.02 INFLUENCE OF. A. SHAPE OF SALT-ROCK SPECIMENS ON THEIR LONG-TERM STRENGTH LIMIT
I. L. Pan’kov
Mining Institute, Ural Branch, Russian Academy of Sciences, Perm, Russia
ABSTRACT: Accelerated investigation into the effect of the salt-rock specimen shape on the long-term strength limit of the mineral was undertaken by the new-developed procedure.
UDC 624.131 + 539.215 PREDICTION OF THE PETROLIFEROUS LAYER AND EARTH SURFACE SUBSIDENCE INDUCED BY OIL RECOVERY FROM THE RESERVOIR
Sh. Altynbekov
International Kazakhstan-Turkey University named after H. Yasavi, Chemkent, Kazakhstan
ABSTRACT: The mechanical-mathematical model of the oil-bearing layer subsidence is proposed. The combined-behavior problem of the oil-tight daylight surface and an petroliferous layer is stated. The solution methods are substantiated. The preliminary analysis of the numerical calculation data is reported.
UDC 539.3 MODELING OF THE EFFECT OF THE DOWNHOLE CHARGE EXPLOSURE ON. A. ROCK MASS
Sh.A. Dildabaev
Institute of Mechanics and Engineering named after U. A. Joldasbekov, Almaty, Kazakhstan
ABSTRACT: The mathematical model of the downhole charge is described. Calculation formulae for evaluation of dynamic shear are used to study the dynamic charge effect on a virgin and surrounding rock masses around an exposed surface.
UDC 622.011.4; 622.023 CALCULATION OF THE CRITICAL STATE AND SHEAR ZONES WITHIN AN ANYSOTROPIC CAVITY-BEARING ROCK MASS
M. E. Eskaliev
Институт механики и машиноведения им. ак. У. А. Джолдасбекова МОН РК, г. Алматы, Казахстан
ABSTRACT:Approximated solution to the elastic-plastic problem of a cavity in a bedded rock mass and an elastic-plastic shear distribution is considered when an elastic rock mass is anisotropic and a plastic zone is isotropic. Differential relationships are built on the curves of characteristics vs radial and circumferential motions.
UDC 539.3 TENSION STRENGTH OF LOADED ROCKS
V. M. Efimov
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The author reports experimental data on the tension strength under bending, when the uniaxial tension and so-call «Brasilian test» method are applied for a number of rocks.
UDC 539.3 : 550.348 SLOW MOTIONS OF THE EARTH’S CRUST AND STRESS CONCENTRATION IN. A. VISCOUS-ELASTIC FAULT ZONE
A. S. Kim
Institute of Mechanics and Engineering named after U. A. Joldasbekov, Almaty, Kazakhstan
ABSTRACT: The viscous-elastic model of a tectonic fault partially exposed at the free surface is proposed. It is established that initially the fault faces move reciprocally at a constant rate, determined by viscous-elastic properties of a fault zone. The uniform motion period is evaluated. It is shown that the conditions, under which the viscous-elastic model can be replaced with a viscous model, depend on structural parameter θs.
UDC 539.3 THE STRESS-STRAIN STATE OF UNDERWORKED ROCKS
A. A. Krasnovsky and V. E. Mirenkov
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The process for the abutment pressure evaluation for a mined foliated mineral seam is considered. Host rocks are assumed also stratified. The singular integral equations, describing deformation of a rock bed and the front mineral bed, are derived. Stepwise approximations are used to find the abutment pressure on a mineral bed, the abutment pressure exhibiting the dependence on geometry and location of beds, mechanical characteristics of beds and pillars, left in worked out areas. Numerical results are discussed.
UDC 622.83 NATURAL STRESS FIELD AT THE MALEYEVSKY DEPOSIT
A. B. Makarov and S. V. Ogorodnikov
Russian State Geological Exploration University, Moscow, Russia
ABSTRACT:The slot-discharge method was used to evaluate experimentally components of natural stresses in a rock mass at the Maleyevsky deposit in Kazakhstan. The natural stress filed at the deposit is found to be in the complete compliance with the elastic model of the rock mass.
UDC 622.831 STRESS STATE OF. A. HOST ROCK MASS IN THE UNDERGROUND MINING OF ORE RESERVES, OCCURRING IN THE CONSERVANCY TERRITIRY
V. M. Seryakov and A. A. Eremenko
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The stress state of a rock mass is evaluated in the induced block caving areas at mineral deposits occurring below conservancy areas in the Gornaya Shoria.
UDC 622.831 ANALYSIS OF THE STRESS STATE IN. A. PIECEWISE-HOMOGENEOUS ROCK MASS ON THE GRAPH ELASTIC-MEDIUM MODEL
A. A. Tyrymov
Volgograd State Technical University, Volgograd, Russia
ABSTRACT: The analysis of the stress-strain state of a virgin rock mass and a rock mass containing mine workings is performed. The numerical modeling is carried out on the graph model of a ponderable elastic medium under plane strain.
UDC 539.3 STRESS STATE IN THE VICINITY OF CONTIGUOUS CHAMBERS UNDER INFLUENCE OF QUASISTATIC LONGITUDINAL COMPRESSION — TENSION WAVE
G.Zh. Urazova
Institute of Mechanics and Engineering named after U. A. Joldasbekov, Almaty, Kazakhstan
ABSTRACT:The stress-strain state in the vicinity of two chambers, oblong parallelepiped in a shape, was studied in terms of the elastic-plastic medium model. It is established that the stress concentration is higher in the vicinity of a smaller chamber as compared to that around a large one. The maximum stress values are registered for the combined effect of static and quasistatic loads.
UDC 624.131 SIMULATION-PROBABILITY MODELS OF THE MACROFRAGMENTAL-ROCK MASSES AND PROCESS FOR THEIR REPRODUCTION
E. A. Fedorova
Chita State University, Chita, Russia
ABSTRACT: The simulation-probability structural models of macrofragmental rock masses are presented and the procedure for their numerical reproduction is considered in terms of packages of fragment models and bond systems.
UDC 622.121.54 METHANE CONTENT DYNAMICS AT HIGH-PRODUCTION STOPING FACE
M. V. Shinkevich, E. N. Kozyreva, and T. A. Kiryaeva
Institute of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, Kemerovo, Russia
ABSTRACT:The proposed calculation algorithm for methane release from the broken coal is based on modern approaches to properties and the state of a coal-methane seam. The algorithm makes it possible to evaluate basic characteristics of the mining process with account for a technological operation mode, gas-bearing capacity of the seam, seam thickness to be extracted, stroke depth, operating speed of a miner, and time of coal conveying.
UDC 622.831 : 550.343 MONITORING OF THE STATE OF THE «RAILWAY TUNNEL-ROCK MASS» SYSTEM IN THE NORTH-CAUCASIAN RAILWAYS PRACTICE
K. P. Bezrodny, Yu.S. Isaev, M. O. Lebedev, and T. K. Pustovoitova
OAO NIPII «Lenmetrogiprotrans», St. Pettersburg, Russia
*Research Institute of Mining Geomechanics and Mining Survey, St. Pettersburg
ABSTRACT:The data of four-years investigation into the state of the «tunnel-rock mass» system under active soil-creep conditions are reported. The season and time regularities of the geodynamic and hydrological rock mass state and the stress-strain state of the tunnel lining are established.
Volume 3. Theory of Forecasting and Prevention of Technogenic Catastrophes. Geomechanical Control in the Mineral Resource Exploitation
UDC 622.831.32 GEOMECHANICAL ASSESSMENT OF PROCESSES FOR MINING OF STEEP DIPPING ORE BODIES UNDER ROCKBURST-HAZARDOUS CONDITIONS
I.Yu. Rasskazov, M. I. Rasskazova, B. G. Saksin, and P. A. Anikin
Mining Institute of Khabarovsk, Far Eastern Branch, Russian Academy of Sciences, Khabarovsk, Russia
ABSTRACT: The authors report the numerical modeling data on the stress-strain state of structural elements of the mining system at Far-East rockburst-hazardous mineral deposits. The established regularities underlying the formation of technogenic stress field at the mined mineral deposits provide the grounds to work out measures aimed at prevention of the dynamic rock-pressure manifestations.
UDC 622.831, 550.8 DEVELOPMENT OF THEORY AND PROCESS FOR FORECASTING OF THE GAS-DYNAMIC EVENT CENTRES IN TECHNOGENICALLY DISTURBED ROCK MASSES
A. D. Ruban, V. N. Zakharov, O. N. Malinnikova, and G. N. Feit
Institute of Complex Exploitation of Mineral Resources, Moscow, Russia
ABSTRACT: The model of the formation of the gas-dynamic event focus under natural-technogenic impacts at a coal face is developed. The authors propose a complex seismic-geomechanical procedure to forecast gas-dynamic events at coal mines.
UDC 550.34 : 551.24 ROCK-BURST FORECASTING AND GEOMECHANICAL MONITORING AT UNDERGROUND MINE WORKINGS
V. V. Ruzhich, V. I. Vostrikov*, and E. A. Levina
Institute of the Earth’s Crust, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russia
*Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The analytical seismic regime data, cited for the Norilsk complex deposit, were taken as the basis to conclude that the dynamics of technogenic impacts on a highly stressed rock mass must be taken into account, otherwise the rock-burst prognosis appears inefficient in most cases. To improve the efficiency of the measures aimed to reduce engineering-seismic risks, it is recommended not only evaluate, but also to control the regime of technogenic impacts on a rock mass and manage these impacts.
UDC 621.039 : 551.2/3 GEODYNAMIC ACTIVITY DIAGNOSIS AT THE AREA SELECTED AS. A. CONSTRUCTION SITE FOR SOUTHERN-URAL ATOMIC POWER STATION
A. D. Sashurin, Yu.P. Konovalova, A. L. Pustuev, V. V. Mel’nik, A. L. Zamyatin
Mining Isntitute, Ural Branch, Russian Academy of Sciences, Ekaterinburg, Russia
ABSTRACT: The diagnostic data on the current geodynamic activity of the exploration area and the construction site for Southern-Ural atomic power station are presented. From the data on the present-day actual Earth’s crust motions, two equal-worth safe sites are selected to construct the objects of the atomic power station.
UDC 519.2 + 550.34 + 681.3(04)
MANIFESTATION OF QUASIPERIODOCITY, SYNCHRONIZATION, AND REALIZATIONS OF. A. RANDOM PROCESS IN. A. SEISMIC EVENT SERIES
N. A. Sycheva and L. M. Bogomolov*
Scientific Station, Russian Academy of Sciences, Bishkek, Kyrgyzstan
*Institute of Marine Geology and Geophysics, Far-East Branch, Russian Academy of Sciences, Yuzhno-Sakhalinsk, Russia
ABSTRACT: The authors consider a number of Asian seismic active areas: the Tien-Shan, the Baikal, Sakhalin, and Kamchatka and analyze the chronological seismicity distribution in order to establish the quasiperiodic variations, viz., daily variations, first of all, and sequences, corresponding to random-process realizations. It is shown that the phase of daily variations in averaged seismic activity is synchronized with local time, rather than with the moon-sun tide phase. This argues in favor of the ionsphere effect, because the daily variations relating to the change of the light and dark periods are actually specific to ionosphere effects. It is shown that sequence of seismic events within short time intervals corresponds to the random process realizations, described in Poiya distribution.
UDC 539.3 GEORESONANCE ROLE IN TECTONIC EARTHQUAKES
A. A. Baimukhametov, A. K. Egorov, and M. A. Baimukhametov
Institute of Mechanics and Engineering named after U. A. Joldasbekov, Almaty, Kazakhstan
ABSTRACT:The research object is bifurcated spheroidal oscillations of the elastic compressible Earth’s model. They are caused by the loss of the oscillation stability under the inertia force effect on the Earth’s rotation around its own polar axis in the potential attration field, generated by the cosmic bodies: the Moon, the Sun, and planets of the Solar system. It is established that georesonances, quite presumable under above conditions, can work as a release mechanism for tectonic earthquakes.
UDC 539.3 GEOMECHANICAL PROCESSES IN THE INITIAL STAGE OF DIAPIRISM IN THE VISCOUS-PLASTIC MEDIUM
A. A. Baimukhametov, N. I. Martynov, and A. G. Tanirbergenov
Institute of Mechanics and Engineering named after U. A. Joldasbekov, Almaty, Kazakhstan
ABSTRACT: The initial diapirism stage is studied on the model of the gravity instability of a two-layered non-Newtonian viscous-plastic medium on a stiff base under horizontal tectonic effect. The effect of rheological parameters and tectonic forces on geometry and the rate of growth of new-born diapirs is evaluated. The loss of stability of layers becomes impossible at certain parameters.
UDC 622.83 SPECIFIC FEATURES OF DEFORMATION AND FAILURE OF CROWN PILLARS IN MINING OF CONTIGUOUS POTASSIUM SEAMS
V. A. Asanov, V. A. Toksarov, and A. V. Evseyev
Mining Institute, Ural Branch, Russian Academy of Sciences, Perm, Russia
ABSTRACT: Research data on deformation and failure of rocks in the vicinity of mine workings in chamber mining of two contiguous potassium seams are reported. Basic factors influencing the intensity of the failure of inter-layer rock mass are identified.
UDC 622.83 : 622.34 MONITORING OF THE BY-PITWALL ROCK MASS STATE IN MINING OF UPLAND MINERAL DEPOSITS
K.Ch Kozhogulov and O. V. Nikol’skaya
Institute of Geomechanics and Mineral Resource Development, Bishkek, Kyrgyzstan
ABSTRACT: The calculation data on the pitwall stability coefficient and the analysis of the stress state of a by-pitwall rock mass are reported. Parameters of the upland pit at the Jerui deposit, Kyrgyzstan, are surveyed, and recommendations on the safe development of this deposit are worked out.
UDC 519.62 : 531.5 SUBSTANTIATION OF PARAMETERS OF THE CONTROLLED HYDRAULIC ROOF FRACTURING TO CHOKE DYNAMIC PHENOMENA AT COAL STOPES AND DEVELOPMENT FACES
S. V. Klishin
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The stress-strain state of a coal seam and overlying rock mass is numerically studied in 2D statement. The domains of the maximum tension forces are established. It is shown that the rock-mass lamination by the controlled hydrofracturing appreciably reduces high loads in the boundary section of a coal seam.
UDC 550.34 ACOUSTIC EMISSION AND ROCK STRAIN UNDER HIGHER SEISMICITY IN KAMCHATKA
I. A. Larionov, Yu.V. Marapulets, and B. M. Shevtsov
Institute of Space-Physical Research and Radiowave Propagation, Far East Branch, Russian Academy of Sciences, Paratunka, the Kamchtka Region, Russia
ABSTRACT: Properties and mechanisms for the high-frequency geoacoustic emission origin in the close-to-surface sedimentary rocks are considered as a response to strain processes.
UDC 622.831 + 550.34 A TECHNOGENIC SEISMIC EVENT AS. A. GEODYNAMIC HAZARD CRITERION FOR. A. MINERAL DEPOSIT
A. V. Lovchikov
Mining Institute, Kola Scientific Centre, Russian Academy of Sciences, Apatity, Russia
ABSTRACT: The author introduces the data on seismic manifestations at the highly rockburst-prone deposits in Russia: Khibinskoe, Lovozerskoe, Tashtagol, and SUBR. It is recommended to assess the seismic activity of deposits by comparing the power of released seismic energy during the strongest seismic event for the operation period.
UDC 622.831.32 ROLE OF THE ROCK MASS WEAKENING PLANES IN THE ROCK BURST MANIFESTATION MECHANISM AT THE TASHTAGOL MINE
G. L. Lindin and T. V. Lobanova*
Novokuznetsk affiliate-Institute, Kemerovo State University, Novokuznetsk, Russia
*OAO «VostNIGRI», Novokuznetsk, Russia
ABSTRACT: Orientation and rock mass motions along weakening planes, formed during seismic event manifestations, were studied from the data on seismic activity monitoring within 1998–2008 at the Tashtagol mine. Large-scale seismic events are generated under certain conditions involving this job fulfilled in the required amount, intersecting of most weakened epicenter planes in a mined block or an adjacent-to-it block and a deviation from the normal law of the histogram for distribution of seismic events, induced by technological and coyote blasts.
UDC 624.153.7 + 531.7 AUTOMATED STUDIES OF LOAD CHARACTERISTICS OF SOIL ANCHORS
A. A. Kramajyan and E. P. Rusin
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The authors describe the design and the mounting of pivot soil anchors with a flexible load-carrying component. Requirements are formulated for the automated instrumentation designed to make in-situ measurements of load characteristics of anchors. The complex is described and the field test data on the study anchors are reported.
UDC 622.273.817 CAUSES OF CATASTROPHIC METHANE EXPLOSIONS IN ACTIVE STOPES AND PREVENTIVE MEASURES
V. A. Skritsky
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The author describes the movement of methane from a goaf into a longwall and adjacent workings in an explosion and the subsequent explosion evolution at the mine working network.
UDC 624.131 NUMERICAL MODELING OF SURFACE SUBSIDENCE IN SUBWAY TUNNELLING
L. A. Strokova
Tomsk Polytechnical University, Tomsk, Russia
ABSTRACT: The modeling data on the surface subsidence in the shield excavation of a Metro line are reported. The calculation model was verified by field measurements of surface subsidence after the tunneling was completed. The soil model, representatively describing the earth surface subsidence during the tunneling operation, was selected.
UDC 622.411 EVALUATION OF LAMINAR SEPARATION OF LONGWALL ROOF ROCKS
S. V. Kuznetsov and V. A. Trofimov
Institute of Complex Exploitation of Mineral Resources, Russian Academy of Sciences, Moscow, Russia
ABSTRACT: The process and the algorithm for numerical modeling of extended roof fracturing at a stope are proposed. Parameters and conditions for their origin and extending with account for the strength properties of contact overlaying rock strata are reported.
UDC 624.131 FORECAST OF SEISMIC STABILITY OF ROOFS OF SUBSURFACE VOIDS TO EXPLOSIVE ROCK BREAKAGE AT OPEN PITS
E. A. Fedorova
Chita State University, Chita, Russia
ABSTRACT: The process to forecast the seismic stability of large subsurface voids is proposed with account for the character of the non-continuous medium strain under conditions of the coyote explosions at an open pit.
UDC 622.833 : 622.232 PROCEDURE FOR FORECASTING GEOMECHANICAL PARAMETERS OF MINING FIELDS AND MINE AREAS IN CONCURRENT MINING OF. A. SERIES OF CONTIGUOUS COAL SEAMS
V. N. Fryanov and L. D. Pavlova
GOU VPO «Siberian State Industrial University» Novokuznetsk, Russia
ABSTRACT: The authors lay out the procedure for evaluation of geomechanical parameters of mining fields and mine areas with consideration for coal blocks and spacious-time locations of stopes, pillar extraction sequence and other factors, responsible for probable emergency accidents within the acceptable risk range and the maximum mining profitability.
UDC 622.831 CALCULATION OF ZONES OF CAVING EVOLUTION IN OVERLAYING ROCKS IN MINING OF MINERAL DEPOSITS IN THE GORNAYA SHORIA
V. M. Seryakov
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
ABSTRACT: The mathematical modeling of the stress-strain state of a rock mass and underworked strata is performed for mining areas located at some depth from the earth surface.
UDC 622.274.82 FIRE-SAFE MINING OF STEEP DIPPING THICK COAL SEAMS IN THE PROKOPIEVSK-KISELYOVSK REGION, KUZNETSKY COAL BASIN
V. A. Skritsky and V. A. Shchekatuev*
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
*The Tyrganskay Mine, OAO Prokopievskugol, Prokopievsk, Russia
ABSTRACT: Under discussion is the hydraulic coal mining and the advanced approaches to the rock pressure effect on the origin of spontaneous coal combustion spots in goafs. It is outlined that the transition to the sublevel hydromining of steep coal seams should provide appreciable improvement of mining efficiency and lower the endogenous fire hazard.
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