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2013 year, number 4

1.
Kinetics of Seismic Emission in Coal Mines in Kuzbass

V. N. OPARIN1,2, A. F. EMANOV3, V. I. VOSTRIKOV1, L. V. TSIBIZOV2
1N.A. Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
2Novosibirsk Sate University, ul. Pirogova 2, Novosibirsk, 630090 Russia
3Altay-Sayan Division of Geophysical Service, Siberian Branch, Russian Academy of Sciences, pr. Akad. Koptyuga 3, Novosibirsk, 630090 Russia
Keywords: seismic emission development, kinematic characteristics, coupled pendulum waves, coal beds Breevsky and Tolmachevsky, Kuzbass, rockburst hazard criterion χ

Abstract >>
The article gives the experimental proof of effective use of the kinematic criterion χ, derived by Oparin for “apparent” velocities of pendulum waves based on deterministic description of seismic energy release in the Norilsk mine fields, for assessment of stresses and strains in coal beds in terms of the Polysaevskaya Mine, Kuzbass.



2.
Effect of Partial Water Flooding on the StressStrain State of the Crown Pillar in the Aikhal Mine

M. V. KURLENYA, V. D. BARYSHNIKOV, L. N. GAKHOVA
N.A. Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: stresses, strains, rock mass, confining bed, open pit mine

Abstract >>
Based on numerical modeling of stressstrain state of rocks and the in situ deformation monitoring of rocks mass surrounding underground excavations, the authors determine limit criteria of geomechanical stability of mine structural elements in terms of the Aikhal Mine where mining has been transferred under the worked-out open pit bottom. Using the determined criteria, the stressstrain state and subsidence of the crown pillar are assessed, considering current stage of the water table in the open pit. The article gives predictive estimate of the change in the stressstrain state and subsidence of the crown pillar upon the water level raising.



3.
Use of Acoustic Emission Memory of Composites for Ultimate Stress Control in Rock Masses

V. L. SHKURATNIK, P. V. NIKOLENKO
Moscow State Mining University, Leninskii pr. 6, Moscow, 119991 Russia
Keywords: stressstrain state, rock mass, composites, acoustic emission, memory effect, sensor-indicator

Abstract >>
The regular patterns of initiation and show of acoustic emission memory effect in a composite are experimentally obtained using cloth laminate. The authors illustrate capacity of cloth laminate as an absolute sensitive stress-to-acoustic emission converter. The designed and tested downhole sensor enclosing this converter provides indication of incremental stress excess over pre-assigned critical limit.



4.
Natural Stress State Assessment in the Nurkazgan Mine

A. V. LEONTEV1, A. B. MAKAROV2, A. YU. TARASOV3
1N.A. Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
2SRK Consulting (Russia), Kuznetskii most 4/3, Moscow, 125009 Russia
3Kazakhmys Corporation, pl. Metallurgov 1, Zhezkazgan, 100600 Kazakhstan
Keywords: rock mass, stressstrain state, instrumentation hydraulic fracturing, rock failure

Abstract >>
The article reports the integrated assessment of natural stresses in rock mass in the Nurkazgan Mine. The visual observation of underground excavations and instrumental measurements of effective stresses denote the hydrostatic stress state within the studied minefield



5.
Forecast of Excavation Stability in Weak Yakovlsevsky Iron Ore

A. G. PROTOSENYA, V. L. TRUSHKO
Gorny Natural Mineral and Raw Materials University, 21st liniya 2, Saint-Petersburg, 199026 Russia
Keywords: ore, support, arch, stress, strain, excavation, stability, strength

Abstract >>
The issues of physico-mechanical properties of ore and rocks, measurement of displacements in rock mass around underground excavations, stability of the excavations, selection of types and parameters of supports are studied in terms of the Yakovlevsky iron ore deposit



6.
Mathematical Modeling of Rock Specimen Deformation

V. E. MIRENKOV, A. A. KRASNOVSKY
N.A. Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: deformation, specimen, elastic model, mechanical characteristics, boundary conditions, displacements, acoustic emission

Abstract >>
Out of aspects of modeling mathematically deformation of rock specimens, the article analyzes soft and rigid loading. The authors formulate an inverse problem on identification of mechanical properties, boundary conditions and geometry of weak areas using overspecified conditions using data on measured displacements and acoustic-electromagnetic emission that characterizes rock failure under loading.



7.
The Strongest Rockbursts and Mining-Induced Earthquakes in Russia

A. V. LOVCHIKOV
Mining Institute, Kola Scientific Center, Russian Academy of Sciences, ul. Fersmana 24, Apatity, 184209 Russia
Keywords: rockbursts, mining-induced earthquakes, magnitude, energy class, geodynamic hazard

Abstract >>
Based on the review of the strongest mining-induced rockbursts with the same seismic characteristics recorded in underground mines in Russia, the author compares the events based on their energy parameters. It is shown that the mining-induced seismic events on the Kola Peninsula are still the strongest events.



8.
Quasi-Brittle Rock Failure Model

V. M. KORNEV, A. A. ZINOVEV
M.A. Lavrentev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, pr. Akad. Lavrenteva 15, Novosibirsk, 630090 Russia
Keywords: quasi-brittle failure, structured materials, coal, inner fracture, necessary and sufficient criteria

Abstract >>
The article presents and discusses a quasi-brittle rock failure model, analytical expressions constructed for limit stresses using necessary and sufficient criteria of structured rock failure, normal tensile stresses in rock mass with fracture, quasi-brittle failure diagram constructed using approximation of two-section kinked stressstrain curves obtained in coal under tension, and critical stress estimates.



9.
Stochastic Mine Production Scheduling with Multiple Processes: Application at Escondida Norte, Chile

L. MONTIEL, R. DIMITRAKOPOULOS
McGill University, Montreal, H3A 2A7 Qc, Canada
Keywords: mining complex, simulated annealing, multiple ore processing streams, mine production scheduling

Abstract >>
Mining complexes can contain multiple mines operating simultaneously along with multiple processing streams, stockpiles and products. Stochastic optimization methods developed to date generateonly local optimal solutions in the sense that they do not consider the entire mining complex. This paper presents an extension of a multi-stage method used for generating long-term risk-based mine production schedules, to operations with multiple rock types and processing streams. The developed method uses a simulated annealing based algorithm during the optimization stage, seeking to minimize deviations from production targets for waste and different ore processing streams. The proposed approach is applied at Escondida Norte copper deposit, Chile, in which sulphide, oxide, mixed and waste materials are present with milling, bio-leaching and acid-leaching being the available processing streams. The stochastic schedule generates expected deviations from mill and waste production targets smaller than 5%, which avoid indirect costs associated to idle capacities. A schedule generated conventionally exhibits expected deviations of the order of 20%.



10.
Fire-Hazardous Ore Mining and Stockpiling Technology

V. KH. KUMYKOV, T. M. KUMYKOVA
D. Serikbaev East-Kazakhstan State Technical University, ul. Protozanova 69, Ust-Kamenogorsk, 070004 Kazakhstan
Keywords: opencast polymetal ore mining, spontaneous ignition, endogeneous fires, excavation, lengthway and cross cuts, working bench, stokpile, injector, inhibitor

Abstract >>
The authors report experimental research and in situ study of oxidation and ignition factors in opencast mining of fire-hazardous ore. The article makes recommendations on spontaneously flammable ore extraction and storage as well as prevention of endogenous fires and fire protection in sulfide ore stockpiles.



11.
Use of the Combined Impact Crusher DKD-300 in the Dry Concentration Scheme at Zarnitsa Kimberlite Pipe

A. I. MATVEEV, E. S. LVOV, D. A. OSIPOV
N.V. Chersky Institute of Mining of the North, Siberian Branch, Russian Academy of Sciences, pr. Lenina 43, Yakutsk, 677980 Russia
Keywords: crushing, crusher, dissociation, kimberlite ore, preservation, crystals, circulatin load

Abstract >>
The article describes experimental destruction of kimberlite ore and impact crushers and bases the use of the combined impact crusher DKD-300 at one of the crushing stages within the dry concentration scheme at the Zarnitsa kimberlite pipe projectre.



12.
Stand Modeling the Hammer HeadImpact ToolRock Mass Interaction

L. V. GORODILOV, V. P. EFIMOV, V. G. KUDRYAVTSEV
N.A. Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: hammer head, tool, dampener, pendulum drop hammer, impact pulse, rock mass

Abstract >>
The authors have designed a stand with a pendulum drop hammer to model the hammer headimpact toolrock mass interaction. The rock mass is simulated with an adjustable gasliquid dampener, metal plate and marble block. The comparison analysis includes measured impact pulses in the hammer head and the impact tool, and the influence of the hammer head velocity recovery factors on interaction of the hammer head and impact tool with the dampener and rock block.



13.
Monitoring of Technical State of Transportation Vehicles and Production Machines

A. L. MANAKOV, A. A. IGUMNOV, S. A. KOLARZH AND
Siberian Transport University, ul. D. Kovalchuk 191, Novosibirsk, 630049 Russia
Keywords: engineering diagnostics, technical state monitoring, remaining life expectancy, maintenance, sudden failure, test parameters

Abstract >>
The article describes the design of the unique monitoring system for technical state of transportation vehicles and production machines used in mining and construction. The introduction of the system will cut down expenditures due to sudden machine failure, and will increase efficiency and capacity of machines.



14.
Electrochemical Polarization Effect on Surface Composition, Electrochemical Characteristics and Adsorption Properties of Pyrite, Arsenopyrite and Chalcopyrite during Flotation

T. N. MATVEEVA, V. A. CHANTURIA, N. K. GROMOVA, L. B. LANTSOVA, E. V. KOPORULINA
Institute of Comprehensive Exploitation of Mineral Resources, Russian Academy of Sciences, Kryukovskii tupik 4, Moscow, 111020 Russia
Keywords: electrochemical polarization, sulfide minerals, flotation

Abstract >>
The article presents experimental research of the influence exerted by electrochemical polarization on electrode potential, phase composition of surface formations, adsorption of collector and floatability of basic sulfides of gold-bearing ore. It is shown that phase composition of surface formations under different polarization modes affects adsorption of collectors and floatability of minerals.



15.
Technological and Economic Effect of Nonmechanical Energy Deposition in Rebellious Mineral Processing

V. I. ROSTOVTSEV
N.A. Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: minerals, nonmechanical energy deposition, ore preparation, processing, technological and economic efficiency

Abstract >>
Based on the nonmechanical energy deposition tests aimed at intensification of destruction and processing of rebellious minerals, it is found that mineral treatment by accelerated electron flow enhances technological performance of mineral processes and is cost-effective: metal extraction grows by 27% and processing performance is enhanced 2.2 times.



16.
Kinetic Physicochemical Ion Model of Collectors Sorptive Layer Formation on Galena Grain Surface

B. E. GORYACHEV, A. A. NIKOLAEV
National University of Science and Technology MISiS, Leninskii pr. 4, Moscow, 119049 Russia
Keywords: flotation, hydrophobic behavior, relative surface fraction, sorptive layer of collector, ion content of liquid phase of slurry, flotation agents, sulfide minerals

Abstract >>
In terms of galena, the authors specify construction principles for kinetic ion modeling of surface layer composition on grains of sulfide minerals of nonferrous heavy metals during flotation. The physical sense of the models consists in connection of parameters of ions within liquid phase of flotation slurry with relative fractions of mineral grain surface. Commercial tests proved the theoretical concept on formation of sorptive layer of sulfhydryl collectors on the surface of sulfide mineral grains under flotation conditions.



17.
X-ray Crystal Analysis to Forecast Efficiency of Preliminary Mechanical Activation of Loparite Concentrate

E. V. BOGATYREVA, A. G. ERMILOV, O. V. KHOKHLOVA
National University of Science and Technology MISIS, Leninskii pr. 4, Moscow, 119049 Russia
Keywords: loparite concentrate, mechanical activation, nitric-acid leaching, X-ray crustal analysis

Abstract >>
It is possible to forecast efficiency of mechanical activation of loparite concentrate to make it subsequent nitric-acid leaching fast using the X-ray crystal analysis data. It is found that the type of accumulated energy influences the energy of activation and reactivity of loparite. The authors suggest an expression to estimate extraction of rare earth elements in nitric-acid solution versus energy of structural changes caused in loparite by mechanical activation and leaching.



18.
Hard Mineral Mining and Raw Materials Supply in Russia: Current State and Problems

V. N. OPARIN, A. M. FREIDIN, A. P. TAPSIEV, P. A. FILIPPOV
N.A. Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: hard minerals, technological support, mining sciences, registered economic resource base, use per capita, ecological issues

Abstract >>
The article focuses on the current situation and problems of the mineral and raw materials base in Russian Federation.