JMS, Vol. 59, No. 5, 2023
GEOMECHANICS
CONTRIBUTION OF MINERAL IMPURITIES TO COALBED METHANE ACCUMULATION AND RETENTION
V. N. Zakharov, E. V. Ul’yanova*, and O. N. Malinnikova**
Academician Melnikov Research Institute for Comprehensive Exploitation of Mineral Resources—IPKON,
Russian Academy of Sciences, Moscow, 111020 Russia
*e-mail: ulyanova_e@ipkonran.ru
**e-mail: malinnikova_o@ipkonran.ru
The implemented research shows that coalbed gas content in face area is proportional to pyrite content of coal, calculated with respect to iron and sulfur contents determined on X-ray fluorescent spectrometer. These results confirm the hypothesis on methane formation in coal during recovery of carbon oxides in the presence of iron-bearing minerals, in particular, pyrite, and water, and explain different contents of methane in the same rank coals. The obtained inverse proportion between the coalbed gas content in the face area and the sorption surface of coal allows supposing that methane accumulations concentrate mainly in the “solid solution” and in the closed porosity, i.e. in the coal structure. For this reason, it is more difficult and longer to recover such methane from coal than methane accumulated in open pores and fractures, which quickly leaves coal in face area.
Coal bed, gas content, face area, pyrite, sorption surface
DOI: 10.1134/S1062739123050010
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A MODEL OF JOINT ROCK–PROPPANT DEFORMATION IN HYDRAULIC FRACTURING
D. S. Zhurkina, S. V. Lavrikov*, and A. F. Revuzhenko
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
*e-mail: lvk64@mail.ru
The study focuses on the connection between two processes: deformation of proppant under the action of rock pressure and the rock pressure change after injection pressure release. The modeling of proppant deformation (mechanics of granular medium) uses the discrete element method, and the rock pressure redistribution (rock mechanics) is modeled using the earlier developed model of rock as a medium with internal energy sources and sinks, and the finite element method. The numerical modeling shows that depending on the loading history and on the rock mass properties, the mode of deformation can be both stable and unstable. For the stable mode of deformation, the pressure balance is calculated at the created fracture boundary, and the change in the proppant porosity is estimated. In the unstable mode, rock mass experiences dynamic events induced by rock pressure.
Hydraulic fracturing, proppant, porosity, rock pressure, stability, numerical modeling, discrete element method, finite element method
DOI: 10.1134/S1062739123050022
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PHYSICAL AND MECHANICAL PROPERTIES OF ORE AND ROCKS AFTER FLOODING
A. A. Eremenko*, T. P. Darbinyan**, Yu. N. Shaposhnik, O. M. Usol’tseva, and P. A. Tsoi
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
*e-mail: eremenko@ngs.ru
Norilsk Nickel, Norilsk, 663302 Russia
**e-mail: DarbinyanTP@nornik.ru
The authors investigate the physical and mechanical properties of hornstone, gabbro-dolerite and rich chalcopyrite–pyrrhotine ore subjected to flooding at the Oktyabrsky deposit in the Talnakh ore province. The analysis of the petrography, chemistry and mineralogy of the test samples showed no substantial differences in their properties after flooding. The comparison of the strength and deformation characteristics of rocks from the uniaxial compression and tension testing results demonstrate the decrease of both in water-saturated rocks and the increase in the room-temperature dried samples. The limit strength, elasticity modulus and internal friction angles have smaller values in rocks after drying than in the initial samples.
Mineral deposit, ore, rocks, flooding, spontaneous firing, oxidizability, strength, elemental composition, cohesion, internal friction angle, stress
DOI: 10.1134/S1062739123050034
REFERENCES
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TEMPORARY STRUCTURE FORMATION IN GRANULAR MEDIA UNDER PERIODIC SHEAR: NUMERICAL MODELING AND EXPERIMENT
V. P. Kosykh* and O. A. Mikenina**
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
*e-mail: v-kosykh@yandex.ru
**e-mail: olgarev@yandex.ru
The authors implemented a series of lab-scale cyclic shear deformation tests of granular medium. The steady-state boundary conditions kept for the hundreds of thousands shear cycles result in the time-varying response of the test medium. The periods of stress fluctuations of the order of tens, hundreds and thousands cycles are observed in the medium. The time-varying response of the medium is connected with periodic formation and deformation of clusters and force chains in the medium. The DEM-based numerical modeling of cyclic shear of a granular medium with the same loading program as in the tests shows the adequacy of the discrete element method and the agreement of the numerical and experimental data.
Granular medium, shear, stress diagram, clusters, discrete elements, long periods, time-varying response
DOI: 10.1134/S1062739123050046
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TIME HISTORY OF ELASTIC CHARACTERISTICS IN PITWALL ROCK MASS
V. V. Rybin, K. N. Konstantinov*, and Yu. A. Startsev
Mining Institute, Kola Science Center, Russian Academy of Sciences,
Apatity, 184209 Russia
*e-mail: k.konstantinov@ksc.ru
The article describes the studies on the geomechanical behavior of the large pitwall rock mass using the seismic method. The on-site measurements of elastic wave velocities in rock mass enabled determining the elastic characteristics of rocks, which allowed an inference on the rock mass stability. It is shown that the seismic method provides sufficiently reliable data on the time history of the geomechanical behavior of the large-area pitwall rock mass, and enables the geomechanics and stability control. The long-term experience of using the seismic method to ensure pitwall rock mass stability is presented as a case-study of Zhelezny Open Pit Mine, Kovdor Mining and Processing Plant. The proposed approach is applicable at deep open pit mines.
Geomechanics, pitwall stability, bench, seismic method, profiling, Poisson’s ratio, tomography, monitoring
DOI: 10.1134/S1062739123050058
REFERENCES
1. Kaspar’yan, E.V., Kozhukhovsky, A.V., and Rozanov, I.Yu., Experience of Pit Wall Stability Monitoring, Izv. Vuzov, Gornyi Zh., 2015, no. 5, pp. 67–74.
2. Rozanov, I.Yu. and Kovalev, D.A., Analysis of Radar Monitoring Data on the Slope Stability of Zhelezny Open Pit, Kovdorsky GOK JSC, Mining Informational and Analytical Bulletin—GIAB, 2022, no. 12-1, pp. 122–133.
3. Kozyrev, A.A., Rybin, V.V., and Konstantinov, K.N., Field-scale Investigations of the Stress Field and the Excavation Damaged Zone Extent, the Kola Peninsula, Russia, Abstr. 5th Jubilee Balkan Mining Congress, Ohrid, Macedonia, 2013, pp. 359–365.
4. Mel’nikov, N.N., Kalashnik, A.I., Zaporozhets, D.V., D’yakov, A.Yu., and Maksimov, D.A., Experience of Shallow Georadar Research in the West of the Russian Arctic, Probl. Arkt. i Antarkt., 2016, no. 1, pp. 39–49.
5. Solov’ev, E.E., Savvin, D.V., and Fedorova, L.L., Geocryological Exploration of Frozen Rock Mass by Nondestructive Electromagnetic Methods, Gornyi Zhurnal, 2019, no. 2, pp. 31–37.
6. Takao Kobayashi, Changwan Sun, and Jin-Hyuck Choi, Near-Surface Fault Investigation by Ground Penetrating Radar (GPR) Surveys, J. Geological Society Korea, 2022, vol. 58, no. 4, pp. 445–455.
7. Epifanova, M.V., Fedorov, S.A., Kozyrev, A.A., Rybin, V.V., and Volkov, Yu.I., Engineering Geology in Deep Open Pit Mine Design at Kovdor GOK, Gornyi Zhurnal, 2007, no. 9, pp. 30–33.
8. Kozyrev, A.A., Kagan, M.M., and Chernobrov, D.S., Results Related Pit Wall Microseismic Monitoring (Zhelezny Mine, Kovdorsky GOK, JSC), Proc. 8th Int. Symp. on Rockbursts and Seismicity in Mines, Perm. Min. Inst. RAS, 2013, pp. 501–505.
9. Kaspar’yan, E.V., Rybin, V.V., and Startsev, Yu.A., Application of Seismic Tomography in Geomechanical Monitoring of Pit Wall Site, Vestn. KNC RAN, 2011, no. 3(6), pp. 30–33.
10. Rozanov, I.Yu. and Zav’yalov, A.A., Application of IBIS FM Radar To Pit Wall Monitoring at Zhelezny Open Pit Mine of Kovdor Mining and Processing Plant, Mining Informational and Analytical Bulletin—GIAB, 2018, no. 7, pp. 40–46.
EXPERIMENTAL RESEARCH OF MUDCAKE FORMATION ON LOW-PERMEABLE SANDSTONE SAMPLES
D. M. Evmenova*, N. A. Golikov**, and I. N. El’tsov***
Institute of Petroleum Geology and Geophysics, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630090 Russia
*e-mail: PavlovaDM@ipgg.sbras.ru
**e-mail: GolikovNA@ipgg.sbras.ru
Institute of Computational Mathematics and Mathematical Geophysics, Siberian Branch,
Russian Academy of Sciences, Novosibirsk, 630090 Russia
***e-mail: igor_el@mail.ru
Novosibirsk, State Technical University, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630087 Russia
Novosibirsk State University, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630090 Russia
The authors show that data on characteristics of drill mud penetration zone improve reliability of geoinformation obtained from borehole geology and geophysics. The developed procedure for the data interpretation takes into account the geomechanics and hydrodynamics of drilling. A part of the drill mud penetration zone is represented by mudcake which prevents direct measurement of porosity and permeability. The article describes the experimental studies on growth of the mudcake on the samples of low-permeable sandstone from the Jurassic reservoir rock mass using an original facility. The petrophysical nonuniformity of the mudcake was determined. The repeated measurements revealed the mudding zone.
Mudcake, rock sample, permeability, porosity, experiment, geoinformation system data interpretation, mudding zone, penetration zone
DOI: 10.1134/S106273912305006X
REFERENCES
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2. Pavlova, D.M., Sukhorukova, K.V., Nesterova, G.V., and El’tsov, I.N., Geoelectrical, Hydrodynamic and Geomechanical Characteristics of Jurassic Oil Reservoir from Borehole Geoelectrics and Numerical Modeling, Karotazhnik, 2018, no. 4 (286), pp. 36–46.
3. Nazarov, L.A., Nazarova, L.A., Nesterova, G.V., and El’tsov, I.N., Computer program state registration no. 2012619496 RF.
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18. Evmenova, D.M., Golikov, N.A., Yurkevich, N.V., and El’tsov, I.N., Experimental Investigation of Mudcake in Drilling Mud Circulation, Karotazhnik, 2021, vol. 3, no. 309, pp. 100–108.
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ROCK FRACTURE
MODELING HYDRAULIC FRACTURING NEAR CIRCULAR UNDERGROUND OPENING IN TRIAXIAL COMPRESSION
A. V. Azarov* and S. V. Serdyukov
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
*e-mail: antonazv@mail.ru
The article describes the numerical studies on propagation of hydraulic fracture in the nonuniform-stress elastic environment around a cylindrical cavity. The modeling used the extended method of finite elements. The scope of the modeling embraced different variants of the principal stress orientation relative to the cavity and a disk-shaped initiation fracture. The influence of the stress ratio and stress level on the fracture path is described. The main types of the created fractures are shown. The conditions when the created fracture reaches the cavity surface or propagates along it are analyzed. The features of the fracture propagation and opening pressure are described for the fractures of various shapes depending on the volume of the injection fluid.
Rock mass, underground opening, stress state, hydraulic fracturing, fracture shape, cylindrical cavity, fracture opening and propagation pressure, numerical modeling, extended finite element method
DOI: 10.1134/S1062739123050071
REFERENCES
1. Boak, J. and Kleinberg, R., Shale Gas, Tight Oil, Shale Oil and Hydraulic Fracturing, Future Energy, Elsevier, 2020, pp. 67–95.
2. Wang, H.Y. and Sharma, M.M., Determine In-Situ Stress and Characterize Complex Fractures in Naturally Fractured Reservoirs from Diagnostic Fracture Injection Tests, Rock Mech. Rock Eng., 2019, vol. 52, no. 1, pp. 5025–5045.
3. Amadei, B. and Stephansson, O., Rock Stress and Its Measurement, Springer Science & Business Media, 1997.
4. He, Q., Suorineni, F.T., and Oh, J., Review of Hydraulic Fracturing for Preconditioning in Cave Mining, Rock Mech. Rock Eng., 2016, vol. 49, no. 12, pp. 4893–4910.
5. Chernov, O.I. and Grebennik, O.I., Directional Impact on Solid Difficult Roof in Mines, Mekhanika gornykh porod i mekhanizirovannoi krepi (Mechanics of Rocks and Powered Roof Support), Novosibirsk: Nauka, 1985.
6. Liu, J., Liu, C., Yao, Q., and Si, G., The Position of Hydraulic Fracturing to Initiate Vertical FracturesiIn Hard Hanging Roof for Stress Relief, Int. J. Rock Mech. Min. Sci., 2020, vol. 132, P. 104328.
7. Huang, B., Cheng, Q., and Chen, S., Phenomenon of Methane Driven Caused by Hydraulic Fracturing in Methane-Bearing Coal Seams, Int. J. Min. Sci. Technol., 2016, vol. 26, no. 5, pp. 919–927.
8. Serdykov, S.V., Kurlenya, M.V., Rybalkin, L.A., and Shilova, T.V., Hydraulic Fracturing Effect on Filtration Resistance in Gas Drainage Hole Area in Coal, Journal of Mining Science, 2019, vol. 55, no. 2, pp. 175–184.
9. Lyu, S., Wang, S., Li, J., Chen, X., Chen, L., Dong, Q., and Huang, P., Massive Hydraulic Fracturing to Control Gas OutburstsiIn Soft Coal Seams, Rock Mech. Rock Eng., 2022, vol. 55, no. 3, pp. 1759–1776.
10. Shilova, T.V. and Serdyukov, S.V., Protection of Operating Degassing Holes from Air Inflow from Underground Excavations, Journal of Mining Science, 2015, vol. 51, no. 5, pp. 1049–1055.
11. Shi, F., Wang, D., and Chen, X., A Numerical Study on the Propagation Mechanisms of Hydraulic Fractures in Fracture–Cavity Carbonate Reservoirs, CMES, 2021, vol. 127, pp. 575–598.
12. Martynyuk, P.A. and Sher, E.N., Development of a Crack Close to A Circular Opening with an External Field of Compressive Stresses, Journal of Mining Science, 1996, vol. 32, no. 6, pp. 453–463.
13. Cheng, L., Luo, Z., Yu, Y., Zhao, L., and Zhou, C., Study on the Interaction Mechanism Between Hydraulic Fracture and Natural Karst Cave with the Extended Finite Element Method, Eng. Fracture Mechan., 2019, vol. 222, 106680.
14. Wang, L., Wu, X., Hou, L., Guo, Y., Bi, Z., and Yang, H., Experimental and Numerical Investigation on the Interaction Between Hydraulic Fractures and Vugs in Fracture–Cavity Carbonate Reservoirs, Energies, 2022, vol. 15, no. 20, 7661.
15. Kao, J.W., Wei, S.M., Wang, W.Z., and Jin, Y., Numerical Analysis of the Hydraulic Fracture Communication Modes in Fracture–Cavity Reservoirs, Petroleum Sci., 2022.
16. Xia, B., Zhang, X., Yu, B., and Jia, J., Weakening Effects of Hydraulic Fracture in Hard Roof under the Influence of Stress Arch, Int. J. Min. Sci. Technol., 2018, vol. 28, no. 6, pp. 951–958.
17. Azarov, A.V., Serdyukov, S.V., and Patutin, A.V., Investigation of Hydraulic Fracture in a Poroelastic Medium Containing a Cavity, J. Fundamental Appl. Min. Sci., 2020, vol. 7, no. 1, pp. 12–17.
18. He, B. and Zhuang, X., Modeling Hydraulic Cracks and Inclusion Interaction Using XFEM, Underground Space, 2018, vol. 3, no. 3, pp. 218–228.
19. Luo, Z., Zhang, N., Zhao, L., Zeng, J., Liu, P., and Li, N., Interaction of a Hydraulic Fracture with a Hole in Poroelasticity Medium Based on Extended Finite Element Method, Eng. Analysis Boundary Elements, 2020, vol. 115, pp. 108–119.
20. Liu, B., Jin, Y., and Chen, M., Influence of Vugs in Fractured-Vuggy Carbonate Reservoirs On Hydraulic Fracture Propagation Based on Laboratory Experiments, J. Structural Geol., 2019, vol. 124, pp. 143–150.
21. Kao, J., Xu, D., Bian, X., Yin, S., and Jin, Y., Numerical Analysis of Interaction Between Hydraulic Fracture and a 3D Spherical Cave, 56th US Rock Mechan./Geomech. Symp. OnePetro, 2022.
22. Qiao, J. et al., The Hydraulic Fracturing with Multiple Influencing Factors in Carbonate Fracture-Cavity Reservoirs, Comput. Geotech., 2022, vol. 147, 104773.
23. Serdyukov, S.V., Azarov, A.V., Rybalkin, L.A., and Patutin, A.V., Shapes of Hydraulic Fractures in the Neighborhood of Cylindrical Cavity, Journal of Mining Science, 2021, vol. 57, no. 6, pp. 943–954.
24. Belytschko, T., Chen, H., Xu, J., and Zi, G., Dynamic Crack Propagation Based on Loss of Hyperbolicity and a New Discontinuous Enrichment, Int. J. Numer. Meth. Eng., 2003, vol. 58, no. 12, pp. 1873–1905.
25. Azarov, A.V. and Serdyukov, S.V., 3D Modeling of Hydraulic Fracturing in an Isotropic Elastic Medium with a Fracture Initiator at the Hole Bottom, Journal of Mining Science, 2021, vol. 57, no. 6, pp. 933–942.
26. Klimchuk, I.V. and Malanchenko, V.M., Application of Polymeric Technologies in Mines in Russian, Gorn. Prom., 2007, no. 4, pp. 22–25.
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MODELING ROCK FRACTURE IN CLOSELY SPACED PERIMETER BLASTING
E. N. Sher
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
e-mail: ensher@gmail.com
The article presents the design model and results for the main crack development in closely spaced blasting in brittle rocks. The 3D modeling is described as case-study of crack formation in granite in perimeter blasting of ammonite charges at different spacing and filling of blastholes. The shapes and sizes are determined for the main cracks generated by blasting of single charge and three close-spaced charges. From the modeling results obtained for a specific charge, the method is proposed to determine efficient spacing of blastholes in perimeter blasting to ensure the maximal area of the created crack.
Blast, rocks, fracture, blastholes, numerical modeling, perimeter blasting
DOI: 10.1134/S1062739123050083
REFERENCES
1. Gustafsson, R., Swedish Blasting Technique, SPI, 1973.
2. Brotanek, I and Voda, J., Perimeter Blasting in Mining and Construction, Moscow: Nedra, 1983.
3. Flyagin, A.S. and Zharikov, S.N., Perimeter Blasting in Mining, Vzryv. Delo, 2015, no. 114/71, pp. 194–201.
4. Shilova, T.V. and Serdyukov, S.V., Protection from Operating Degassing Holes from Air Inflow from Underground Excavations, Journal of Mining Science, 2015, vol. 51, no. 5, pp. 1049–1055.
5. Eshonkulov, U.Kh., Olimov, F.M., Saidakhmedov, A.A., et al., Justification of Perimeter Blasting in Construction of Large Cross-Section Roadways in Strong Rocks, Dostizh. Nauki Obraz., 2018, no. 19 (41), pp. 10–13.
6. Zharikov, S.N. and Shemenev, V.G., Impact of Blasting on Pit Wall Stability, Gornyi Zhurnal, 2013, no. 2, pp. 80–83.
7. Kozyrev, S.A. and Kamyansky, V.N., Numerical Models of Blasting in Rocks, Vestn. KNTS RAN, 2019, no. 2 (11), pp. 34–44.
8. Sher, E.N. and Chernikov, A.G., Calculating Parameters of Radial Crack System Induced by Elongated Charge Blasting in Brittle Rocks, J. Fundament. Appl. Min. Sci., 2015, vol. 2, pp. 299–303.
9. Grigoryan, S.S., Some Issues of Mathematical Theory of Solid Rock Deformation and Fracture, Prikl, Mekh. Matem., 1967, vol. 31, issue 4, pp. 643–669.
10. Rodionov, V.N., Adushkin, V.V., Romashev, A.N. et al., Mekhanicheskii effekt podzemnogo vzryva (Mechanical Effect of Underground Explosion), Moscow: Nedra, 1971.
11. Chadwick, P., Cox, A.D., and Hopkins, H.G., Mechanics of Deep Underground Explosions, Philosophical Transactions of the Royal Society A, 1964, vol. 256, issue 1070.
12. Sher, E.N., Modeling Propagation of Fractures in Layered Rock Mass during Blasting and Hydraulic Fracturing, Journal of Mining Science, 2020, vol. 56, no. 6, pp. 914–924.
13. Sher, E.N. and Aleksandrova, N.I., Dynamics of Development of Crushing Zone in in Elastoplastic Medium in Camouflet Explosion of String Charge, Journal of Mining Science, 2019, vol. 33, no. 6, pp. 529–535.
14. Crouch, S.L. and Starfield, A.M., Boundary Elements in Solid Mechanics, Unwin Hyman., 1983.
15. Mikhailov, A.M., Calculation of the Stresses around a Crack, Journal of Mining Science, 2000, vol. 36, no. 5, pp. 445–451.
16. Peach, М. and Koehler, J.S., The Forces Exerted On Dislocations and The Stress Fields Produced by Them, Phys. Rev., 1950, vol. 80, vol. 3, pp. 436–440.
PHENOMENOLOGICAL MODEL FOR EVALUATION OF SLOPE STABILITY FOR OVERBURDEN ROCK DUMPS
V. I. Kulikov* and Z. Z. Sharafiev
Academician Sadovsky Institute of Geosphere Dynamics, Russian Academy of Sciences,
Moscow, 119334 Russia
*e-mail: geospheres@idg.chph.ras.ru
The authors developed the phenomenological model of landslide initiation under multiple seismic effects. The model uses the lab-scale testing data on mechanisms of slope failure under dynamic impacts, the analysis of a large bulk of field data, the instrumental measurements of seismic effects induced by large-scale blasting and the numerical calculations of influence exerted by seismic vibrations on slopes. The rules are formulated for the decision-making in evaluation of potential landslide initiation under seismic impact. Evaluation of slope stability is performed for overburden rock dumps at open pit mines in the Kursk Magnetic Anomaly. It is shown that large-scale blasts in the test open pit mine have no effect on the stability of the dumps, but the damaged drainage and the rising of underground water can result in accumulation of irreversible deformations.
Phenomenological model, landslide, slope failure, multiple impacts, waste rock dumps, seismic vibrations, explosions
DOI: 10.1134/S1062739123050095
REFERENCES
1. Khramtsov, B.A., Bakaras, M.V., Kravchenko, A.S., and Korneichuk, M.A., Loose Dump Stability Control at Open Pit Iron Ore Mines of the Kursk Magnetic Anomaly, Mining Informational and Analytical Bulletin—GIAB, 2018, no. 2, pp. 66–72.
2. Kocharyan, G.G., Sharafiev, Z.Z., Kishkina, S.B., and Chengzhi Qi, Phenomenon of Reduction in Friction at the Toe of Gravity Landslide under Seismic Vibration Effect, Journal of Mining Science, 2022, vol. 58, no. 2, pp. 173–183.
3. Kocharyan, G.G., Besedina, A.N., Kishkina, S.B., Pavov, D.V., Sharafiev, Z.Z., and Kamenev, P.A., Slope Failure Initiation by Seismic Loading from Different Sources, Physics of the Solid Earth, vol. 57, no. 5, pp. 614–626.
4. Kocharyan, G.G., Kishkina, S.B., and Sharafiev, Z.Z., Laboratory Research of Slope Stability Under Impacts, Journal of Mining Science, 2012, vol. 57, no. 6, pp. 965–977.
5. Kishkina, S.B., Kocharyan, G.G., Pavov, D.V., and Sharafiev, Z.Z., Lab-Scale Study of Slope Stability under Pulsed Impacts, Dinamich. Prots. Geosfer., 2020, no. 12, pp. 62–70.
6. Fotopoulou, S.D. and Pitilakis, K.D., Vulnerability Assessment of Reinforced Concrete Buildings at Precarious Slopes Subjected to Combined Ground Shaking and Earthquake Induced Landslide, Soil Dyn. Earthq. Eng., 2017, vol. 93, pp. 84–98.
7. Wang, T., Wu, S.R., Shi, J.S., Xin, P., and Wu, L.Z., Assessment of the Effects of Historical Strong Earthquakes on Large-Scale Landslide Groupings in the Wei River Midstream, Eng. Geol., 2018, vol. 235, pp. 11–19.
8. Forte, G., Verrucci, L., Giulio, A.D., Falco, M.D., Tommasi, P., Lanzo, G., Franke, K.W., and Santo, A., Analysis of Major Rock Slides That Occurred during the 2016–2017 Central Italy Seismic Sequence, Eng. Geol., 2021, vol. 290.
9. Kocharyan, G.G., Besedina, A.N., Gridin, G.A., Morozova, K.G., and Ostapchuk, A.A., Friction as a Factor Determining the Radiation Efficiency of Fault Slips and the Possibility of Their Initiation: State of the Art, Izv. Physics of the Solid Earth, 2023, vol. 59, no. 3, pp. 337–363.
10. Boulton, C., Yao, L., Faulkner, D.R., Townend, J., Toy, V.G., Sutherland, R., Ma, S., and Shimamoto, T., High-Velocity Frictional Properties of Alpine Fault Rocks: Mechanical Data, Microstructural Analysis, and Implications for Rupture Propagation, J. Structural Geol., 2017, vol. 97, pp. 71–92.
11. Bernshtein, V.A., Mekhanogidroliticheskie protsessy i prochnost’ tverdykh tel (Mechano-Hydrolytic Processes and Strength of Solids), Leningrad: Nauka, 1987.
12. Zhitinskaya, O.M., Influence of Components of Geotechnical Conditions on Pitwall Slope Stability in Long-Term Mining, Synopsys of Cand. Geol.-Mineral. Sci. Dissertation, Moscow: RGGU im. Ordzhonikidze, 2018.
INFLUENCE OF PROPPANT PARAMETERS ON HYDRAULIC FRACTURE CONDUCTIVITY
Ying Yang*, Xiaofei Fu, Haiyun Yuan, M. P. Khaidina, and Jianguang Wei**
Northeast Petroleum University, Daqing, 163318 China
*e-mail: yyainngg@126.com
**e-mail: 1426502059@qq.com
Daqing Oilfield Production Technology Institute, Daqing, 163543 China
CNPC International Turkmenistan, Ashkhabad, 744000 Turkmenistan
Gubkin Russian State University of Oil and Gas, Moscow, 199991 Russia
This study focuses on the influence of proppant parameters on the long-term conductivity of hydraulic fractures. Embedment of proppants in fracture walls and proppant crushing was studied using FCMS-V fracture conductivity system, field emission scanning electron microscope, polarization microscope and the screening analysis. The correlations between the conductivity, grain size, grain-size composition, proppant concentration and placement technique, closure pressure of fractures and proppant embedment were revealed. Embedment and crushing of proppant grains of different size under different fracture closure pressures were discussed. The recommendations on proppant placement during hydraulic fracturing were given as a case study of coalbed methane production in YC site of Ordos Basin in China
Experimental research, coalbed methane, hydraulic fracture conductivity, proppant embedment, proppant crushing
DOI: 10.1134/S1062739123050101
REFERENCES
1. Awoleke, O., Romero, J., Zhu, D., and Hill, A.D., Experimental Investigation of Propped Fracture Conductivity in Tight Gas Reservoirs Using Factorial Design, SPE Hydraulic Fracturing Technol. Conf., Texas, USA, February 2012.
2. Lekontsev, Yu.M., Sazhin, P.V., Novik, A.V., and Mezentsev, Yu.B., Methane Production Rate in Hydraulic Fracturing of Coal Seams, Journal of Mining Science, 2021, vol. 57, pp. 595–600.
3. Yang, I., Lyang, M., and Shuaibu, A.M., Efficiency of Hydraulic Fracturing for Methane Recovery from Coal Seams in the Site QD in the Qinshui Basin, China, Neft’. Gaz. Novatsii, 2019, no. 1, pp. 77–82.
4. Ovchinnikov, K.N., Buyanov, A.V., Malyavko, E.A., and Kashapov, D.V., Modeling Marked Proppant Propagation in Hydraulic Fracture, Burenie Neft’, 2020, no. 10, pp. 20–27.
5. Serdyukov, S.V., Kurlenya, M.V., Rybalkin, L.A., and Shilova, T.V., Hydraulic Fracturing Effect on Filtration Resistance in Gas Drainage Hole Area in Coal, Journal of Mining Science, 2019, vol. 55, pp. 175–184.
6. Zheng, W., Silva, S.C., and Tannant, D.D., Crushing Characteristics of Four Different Proppants and Implications for Fracture Conductivity, J. Natural Gas Sci. and Eng., 2018, vol. 53, pp. 125–138.
7. Isah, A., Hiba, M., Al-Azani, K.H., Aljawad, M.S., and Mahmoud, M., A Comprehensive Review of Proppant Transport in Fractured Reservoirs: Experimental, Numerical, and Field Aspects, J. Nat. Gas Sci. Eng., 2021, vol. 88, 103832.
8. Yan Ing, Chen Huan, Wang Henyang, Zhou Qiaofeng, and Qzya Bao, Influence of Tectonic Structure on Methane Production in QD Site in the Qinshui Coal Basin in China, Journal of Mining Science, 2021, vol. 57, no. 3, pp. 437–446.
9. Fan, M., Li, Z., Han, Y., Teng, Y., and Chen, C., Experimental and Numerical Investigations of the Role of Proppant Embedment on Fracture Conductivity in Narrow Fractures, SPE J., 2020, vol. 26, pp. 324–341.
10. Shamsi, M., Nia, S.F., and Jessen, K., Dynamic Conductivity of Proppant-Filled Fractures, J. Pet. Sci. Eng., 2017, vol. 151, pp. 183–193.
11. Mourzenk,o V.V., Thovert, J.-F., and Adler, P.M., Conductivity and Transmissivity of a Single Fracture, Transport in Porous Media, 2018, vol. 123, pp. 235–256.
12. Lei, G., Liao, Q., and Patil, S., A New Mechanistic Model for Conductivity of Hydraulic Fractures with Proppants Embedment and Compaction, J. Hydrology, 2021, vol. 601, 126606.
13. Xu, J., Ding, Y., Yang, L., Liu, Z., Gao, R., Yang, H., and Wang, Z., Conductivity Analysis of Tortuous Fractures Filled with Non-Spherical Proppants, J. Pet. Sci. Eng., 2021, vol. 198, 108235.
14. Huang, Q., Liu, S., Cheng, W., and Wang, G., Fracture Permeability Damage and Recovery Behaviors with Fracturing Fluid Treatment of Coal: An Experimental Study, Fuel, 2020, vol. 282, 118809.
15. Yang, Z., Chen, M., Xu, Y., Meng, C., and Xu, Z., An Experimental Study of Long-Term Flow Conductivity of Volcanic Rock Core Plate, Natur. Gas Industry, 2010, vol. 30, pp. 42–44.
16. Bose, C. C., Fairchild, B.D., Jones, T., Gul, A., and Ghahfarokhi, R.B., Application of Nanoproppants for Fracture Conductivity Improvement by Reducing Fluid Loss and Packing of Micro-Fracture, J. Nat. Gas Sci. Eng., 2015, vol. 27, pp. 424–431.
17. Wilk-Zajdel, K., Kasza, P., and Maslowski, M., Laboratory Testing of Fracture Conductivity Damage by Foam-Based Fracturing Fluids in Low Permeability Tight Gas Formations, Energies, 2021, vol. 14, 1783.
18. ISO 13503-5, Petroleum and Natural Gas Industries—Completion Fluids and Materials, Part 5: Procedures for Measuring the Long-Term Conductivity of Proppants, 2006.
19. National Energy Administration of China, NB/T 14023-2017, Recommended Practices for Measuring the Long-Term Conductivity of Proppant Pack in Shale, Beijing: Nat. Energy Adm., 2017.
20. ISO 13503-2, Petroleum and Natural Gas Industries—Completion Fluids and Materials, Part 2: Measurement of Properties of Proppants Used in Hydraulic Fracturing and Gravel-Packing Operations, 2006.
21. China National Petroleum Corporation, Q/SY 17125-2019, Specification and Evaluating Test Procedure for Proppants Used in Hydraulic Fracturing, Beijing: Petroleum Industry Press, 2019.
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SCIENCE OF MINING MACHINES
DESIGN OF HIGH SPEED ROTORS FOR AXIAL MINE FANS
A. M. Krasyuk*, E. Yu. Russky, N. V. Panova, and T. I. Irgibaev**
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
*e-mail: krasuk@cn.ru
Novosibirsk State Technical University, Novosibirsk, 630073 Russia
Satbayev University, Almaty, 050013 Kazakhstan **e-mail: tuleukhan@mail.ru
The article presents the optimization design results for impellers of axial fans for main ventilation in mines using the criteria of minimum mass and required stress level in fan assemblies. The design of a single disk impeller is justified. For high-duty fans having the blade tip speed of 200–220 m/s, the topology optimization is performed for the single-disk impeller. The dependence between the design parameters of the impeller components and the speed of the fan rotor is determined. The topology optimization is implemented with SIMP in ANSYS.
Impeller body, axial fan, ANSYS, optimality, strength, stresses, design parameters
DOI: 10.1134/S1062739123050113
REFERENCES
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MINERAL DRESSING
INTENSIFICATION OF BASIC PROCESSES IN SEPARATION OF DIFFICULT DIAMOND-BEARING RAW MATERIALS
V. A. Chanturia, G. P. Dvoichenkova*, E. L. Chanturia, and A. S. Timofeev
Academician Melnikov Research Institute for Comprehensive Exploitation of Mineral Resources—IPKON, Russian Academy of Sciences, Moscow, 111020 Russia
*e-mail: dvoigp@mail.ru
Mirny Polytechnical Institute—Division, Ammosov North-Eastern Federal University,
Mirny, 678174 Russia
National University of Science and Technology—MISIS, Moscow, 119049 Russia
The article describes the theoretical and experimental research data on possibility to improve the quality of the end concentrates of float-and-sink, X-ray luminescent, adhesive and froth separation. The method of nitride hardening is proposed for ferrosilicium grain surface with the hardened layer depth in the range of 30–60 nm for reducing ferrosilicium corrosion rate by 2.7 times at the preserved process properties. The necessity of adding the primary float-and-sink flotation circuit with two-stage magnetic separation to decrease the yield of rough concentrates and to improve their quality owing to removal of 29–95% of siderite. The optimized composition of luminophore-bearing modifying agent ensures complete recovery of earlier unrecoverable diamonds in concentrate at the maximum kimberlite yield of 2.5%. The workbench test processing of difficult diamond-bearing raw materials proves the possibility of incremental diamond concentration in adhesive and froth separation (by 14.0% and 12.7%, respectively), and in the cycle of finishing operations in X-ray luminescent separation (by 25.3%) owing to modification of surface properties of diamond crystals using physicochemical methods and energy deposition.
Diamonds, minerals, ferrosilicium, suspension, separation, cycle, finishing, modification, recovery, emulsion
DOI: 10.1134/S1062739123050125
REFERENCES
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4. Klyuev, R.V., Bosikov, I.I., Mayer, А.V., and Gavrina, О.А., Comprehensive Analysis of the Use of Effective Technologies to Improve the Sustainable Development of the Natural and Engineering System, Ustoichivoe razvitie gornykh territorii, 2020, vol. 12, no. 2, pp. 283–290.
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6. Chanturia, V.А., Kozlov, А.P., Shadrunova, I.V., and Ozhogina, Е.G., Priority Trends for the Development of Exploratory and Applied Scientific Research in the Field of Industrial Use of Waste from Mining and Processing of Minerals, Gornaya Prom., 2014, no. 1, p. 54.
7. Chanturia, V.А., Bondar’, S.S., Godun, К.V., and Goryachev, B.Е., The Current State of the Diamond Mining Industry in Russia and the Main Diamond-Mining Countries of the World (Part 2), Gornyi Zhurnal, 2015, no. 2, pp. 67–75.
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12. Timofeev, А.S., Dvoichenkova, G.P., and Nikitina, Yu.N., Experimental Substantiation of the Possibility of Reducing the Volume of Rough Concentrates in Float-and-Sink Separation of Diamond-Bearing Raw Materials Based on Data from Fractional and Mineralogical Analyzes, Proc. Int. Conf. Plaksin’s Lectures-2022, Vladivostok, 2022.
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18. Myazin, V.P., Narkelyan, L.F., and Trubachev, А.I., K probleme geologo-tekhnicheskogo izucheniya rud i kriteriev ikh obogatimosti. Obogashchenie rud (On the Problem of Geological and Engineering Study of Ores and Their Dressability Criteria. Ore Dressing), Irkutsk: IrGTU, 2002.
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21. Chanturia, V.А., Dvoichenkova, G.P., Timofeev, А.S., and Podkamennyi, Yu.А., Study of Mineral Formations on Diamond Crystal Surface and Their Destruction Conditions in Processing of Current and Waste Tailings of Diamond Recovery Plants, Gornyi Zhurnal, 2019, no. 2, pp. 61–65.
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24. Chanturia, V.А., Bogachev, V.I., Trofimova, E.А., and Dvoichenkova, G.P., Mechanism and Efficiency of Water-Based Removal of Grease from Diamonds during Grease Separation, Journal of Mining Science, 2012, vol. 48, no. 3, pp. 559–564.
PROCESSIBILITY OF FINE-GRAINED MAGNETITE–APATITE ORE MILL TAILINGS AT KOVDOR DEPOSIT
G. V. Mitrofanova, Yu. P. Pospelova*, and D. F. Sedinin**
Mining Institute, Kola Science Center, Russian Academy of Sciences,
Apatity, 184209 Russia
*e-mail: y.pospelova@ksc.ru
Kovdor GOK, Kovdor, 184141 Russia
**e-mail: Dmitry.Sedinin@eurochem.ru
The article presents the laboratory-scale studies on processibility of fine-grained old tailings at Kovdor GOK. Effect of collecting agents represented by fat tall oil acids (FTOA) is investigated. The froth flotation tests show high selectivity of agent Berol-2015 relative to apatite. From the lab-scale tests, it is found that with collector FTOA, the P2O5 content of concentrate is not higher than 24.4% despite a high degree of desliming of flotation feed (~ 70.0%). With collector Berol-2015, the concentrate content of P2O5 reaches 35.0–37.7% without preliminary desliming.
Tailings pond, fine-grained old tailings, desliming, apatite and calcite flotation, nonfrothing flotation, collecting agents, thickening, slimes
DOI: 10.1134/S1062739123050137
REFERENCES
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8. Barmin, I.S., Morozov, V.V., and Polivanskaya, V.V., Analysis and Improvement of Technology for Processing Old Tailings at Kovdorsky GOK, Gornyi Zhurnal, 2020, no. 5, pp. 56–65.
9. Hoang, D.H., Hassanzadeh, A., Peuker, U.A., and Rudolph, M., Impact of Flotation Hydrodynamics on the Optimization of Fine-Grained Carbonaceous Sedimentary Apatite Ore Beneficiation, Powder Technol., 2019, vol. 345, pp. 223–233.
10. Morozov, V.V. and Polivanskaya, V.V., Increasing the Flotation Efficiency of Apatite–Staffelite Ore Using a Two-Stage Slime Thickening Regime, Rudy Metally, 2021, no. 4, pp. 121–131.
11. Morozov, V.V., Barmin, I.S., Tugolukov, А.V., and Polivanskaya, V.V., Increasing the Flotation Efficiency of Apatite-Bearing Ores and Stored Tailings Based on Regulating the Aggregative Stability of Slimes, Gornyi Zhurnal, 2019, no. 1, pp. 56–60.
12. Ruan, Y., He, D., and Chi, R., Review on Beneficiation Techniques and Reagents Used for Phoshate Ores, Minerals, 2019, vol. 9, pp. 1–18.
13. Ivanova, V.А., Mitrofanova, G.V., and Perunkova, Т.N., Enhancement of Efficiency of Low-Hydroxyethylated Alkyl Phenols as Regulators in Selective Flotation of Non-Sulphide Minerals, Journal of Mining Science, vol. 54, no. 3, pp. 479–484.
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15. Teague, A.J. and Lollback, M.C., The Beneficiation of Ultrafine Phosphate, Miner. Eng., 2012, vol. 27–28, pp. 52–59.
16. Ivanova, V.A., Mitrofanova, G.V., Perunkova, T.N., and Dorozhanova, N.O., Oxyethylated Compounds as Regulators of Selective Flotation of Apatite-Containing Ore, Proc. of the 29th Int. Mineral Proc. Congress: Innovative Technologies are Key to Successful Mineral Processing, Moscow, 2018.
17. Severov, V.V., Filippova, I.V., and Filippov, L.O., Use of Fatty Acids with an Ethoxylated Alcohol for Apatite Flotation from Old Fine-Grained Tailings, Miner. Eng., 2022, vol. 188. — 10783215.
18. Liu, X., Zhang, Y., Liu, T., Cai, Zh., and Sun, K., Characterization and Separation Studies of a Fine Sedimentary Phosphate Ore Slime, Minerals, 2017, vol. 7. — 94.
19. Abdel-Halim, M.M., Abdel Khalek, M.A., Zheng, R., and Gao, Zh., Sodium N-Lauroylsarcosinate (SNLS) as a Selective Collector for Calcareous Phosphate Beneficiation, Minerals, 2022, vol. 12, no. 7. — 829.
20. Patra, A., Taner, H., Bordes, R., et al., Selective Flotation of Calcium Minerals Using Double-Headed Collectors, J. Dispersion Sci. Technol., 2019, vol. 40, no. 8, pp. 1205–1216.
21. Hoang, D.H., Kupka, N., Peuker, U.A., and Rudolph, M., Flotation Study of Fine Grained Carbonaceous Sedimentary Apatite Ore—Challenges in Process Mineralogy and Impact of Hydrodynamics, Miner. Eng., 2018, vol. 121, pp. 196–204.
22. Foucaud, Y., Filippova, I.V., and Filippov, L.O., Investigation of the Depressants Involved in the Selective Flotation of Scheelite from Apatite, Fluorite, and Calcium Silicates: Focus on the Sodium Silicate/Sodium Carbonate System, Powder Technol., 2019, vol. 352, pp. 501–512.
APPLICABILITY OF THE SUSPENSION EFFECT IN ESTIMATION OF INFLUENCE EXERTED BY IONIC COMPOSITION OF FLOTATION PULP ON APATITE SURFACE
A. V. Artem’ev* and G. V. Mitrofanova
Mining Institute, Kola Science Center, Russian Academy of Sciences,
Apatity, 184209 Russia
*e-mail: a.artemev@ksc.ru
By means of determining the suspension effect, the authors studied the change in the surface properties of apatite under the action of reagents and ions present in flotation pulp during processing of apatite-bearing ore. It is shown that the ratio of acid–base centers of apatite surface change in interaction with ions HCO3-, CO32-, HPO42-, cations Ca2+ and oleate ions in distilled water and in water after deionization to remove carbon dioxide. The change in apatite surface properties in alkaline water shows up as quantitative superiority of base centers. Such ionization of mineral surface favors adsorption of cations, for example, Ca2+, and sets background for more efficient interaction between anion-type agents. The data obtained from the studies of the suspension effect, correlate with the results of infrared spectroscopy of apatite treated by the appropriate agents.
Apatite–nepheline ore, apatite, suspension effect, acid–base centers
DOI: 10.1134/S1062739123050149
REFERENCES
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STUDY ON BENEFICIATION TECHNOLOGY FOR RATIONAL UTILIZATION OF LOW-GRADE COPPER NICKEL SYMBIOTIC ORE
F. Gan, L. Gao*, H. Dai, B. Rao, and J. Bai
Faculty of Land Resource Engineering, Kunming University of Science and Technology,
Kunming, Yunnan Province, 650000 China
*e-mail: gfr3316@126.com
Faculty of Resources and Environment Engineering, Yunnan Vocational Institute of Energy Technology,
Qujing, Yunnan Province, 655001 China
In order to realize the rational utilization of low-grade polymetallic symbiotic mineral resources with low input, typical copper–nickel symbiotic low-grade ores were used as the test object. After careful process mineralogy research on the ore, it was learned that the main valuable elements of the ore were Cu and Ni, and the content of these two elements was 0.16 wt.% and 0.39 wt.%, respectively. The main copper-bearing mineral in the ore was chalcopyrite, and the main nickel-bearing mineral was pentlandite. Useful minerals were finely distributed in ores. Based on the properties of ore, a beneficiation process of one stage grinding → copper/nickel mixed flotation → copper/nickel separation was proposed. A copper concentrate with a Cu grade of 17.08 wt.% and a nickel concentrate with a Ni grade of 4.63 wt.% were obtained by separation. This study provides a low-investment technical solution for the rational utilization of polymetallic paragenetic mineral resources.
Process mineralogy, copper–nickel intergrowth ore, low-grade ore, comprehensive utilization of resources
DOI: 10.1134/S1062739123050150
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MINING ECOLOGY AND SUBSOIL MANAGEMENT
BIO-SYSTEM CONCEPT OF TECHNOLOGICAL INNOVATION IN MINING WITH IMPLEMENTATION OF ECOLOGICAL IMPERATIVE
Yu. P. Galchenko and G. V. Kalabin*
Academician Melnikov Research Institute for Comprehensive Exploitation of Mineral Resources—IPKON,
Russian Academy of Sciences, Moscow, 111020 Russia
*e-mail: kalabin.g@gmail.com
The prospects for ecologization of technological paradigm of development in the sector of mineral resources are studied and substantiated with regard to the requirements and constraints, and based on the equal possibilities for the biosphere and technosphere. The notion of the nature-like technologies is structured subject to the coincidence of missions of the content-rich components in the natural and geotechnical systems. The methodology of the homeostatic transformation of the biological system functions into the structure of a cluster on the convergent mining technologies is presented.
Subsoil use, mineral resources, ecological crises, nature-like solutions, ecological imperative, modification, biogenic principles, convergent mining technology, functional structure
DOI: 10.1134/S1062739123050162
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MULTI-ATTRIBUTE RANKING OF ENTITIES FOR LIMESTONE SUPPLY UNDER THE CONDITIONS OF VARIABLE THERMAL POWER COMPLEX STRUCTURE
S. Vujić*, Ž. Praštalo, M. Popović, P. Stjepanović, and J. Nešković
Mining Institute Belgrade, Belgrade 11000 Serbia
*e-mail: slobodan.vujic@ribeograd.ac.rs
Faculty of Organizational Sciences, University of Belgrade, Belgrade, 11000 Serbia
The supply of coal-fired thermal power plants with limestone as a sorbent in the flue gas desulfurization process highlights two key issues. Apart from the raw material quality adequate to meet the technological conditions of the installed desulfurization plants in thermal power systems with several potential production and user entities, the question of rational limestone supply arises. The paper presents a multi-attribute ranking model as a possible approach to solving such tasks.
Multi-attribute ranking, limestone, supply, thermal energy
DOI: 10.1134/S1062739123050174
REFERENCES
1. Study on the Possibility of Supplying Limestone for Flue Gas Desulfurization at the Kostolac CHP, Nikola Tesla CHP and New Thermal Facilities, Mining Institute and Tekon Belgrade, 2014.
2. Šubaranović, T., Vujić, S., Radosavljević, M., Dimitrijević, B., Ilić, S., and Jagodić Krunić, D., Multi-Attribute Scenario Analysis of Protection of Drmno Open Pit Mine against Groundwater, Journal of Mining Science, 2019, vol. 55, no. 2, pp. 280–286.
3. Vujić, S. and Hudej, M., Multi-Variable Assessment of Risk in Selection of Location and the Way of Open Pit Mines Opening, Proc. of the 5th Balkan Mining Congress, Ohrid, 2013.
4. Amankwah, H., Mathematical Optimization Models and Methods for Open-Pit Mining, Department of Mathematics Linkoping University, Linkoping, 2011.
5. Baloyi, V.D. and Meyer, L.D., The Development of a Mining Method Selection Model through a Detailed Assessment of Multi-Criteria Decision Methods, Elsevier, Results in Eng., 2020, vol. 8, 72 p.
6. Dimitrijević, B., Vujić, S., Matic, I., Majianac, S., Praštalo, J., Radosavljević, M., and Colakovic, V., Multi-Criteria Analysis of Land Reclamation Methods at Klenovnik Open Pit Mine, Kostolac Coal Basin, Journal of Mining Science, 2014, vol. 50, no. 2, pp. 319–325.
7. Hudej, M., Vujić, S., Radosavljević, M., and Ilić, S., Multivariable Selection of the Main Mine Shaft Location, Journal of Mining Science, 2013, vol. 49, no. 6, pp. 950–954.
8. Matos, P.V., Cardadeiro, E., Silva, J.A., and Muylder, C.F., The Use of Multi-Criteria Analysis in the Recovery of Abandoned Mines: A Study of Intervention in Portugal, RAUSP Management J., 2018, vol. 53, pp. 214–224.
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10. Patyk, M., Bodziony, P., and Krysa, Y., A Multiple Criteria Decision Making Method to Weight the Sustainability Criteria of Equipment Selection for Surface Mining, Energies, 2021, vol. 14, pp. 1–14.
11. Stanojevic, R., Optimization of Macroeconomic Models, Velatra, Belgrade, 2001.
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14. Vujić, S., Quantitative Models for Decision-Making Support in Mining Planning and Design, Mining Institute Belgrade, 2023.
SINGLE-CRITERION OPTIMIZATION OF LIMESTONE SUPPLY UNDER THE CONDITIONS OF VARIABLE THERMAL POWER COMPLEX STRUCTURE AND THE DIFFERENCES BETWEEN SOLUTIONS
Ž. Praštalo, S. Vujić*, M. Kuzmanović, P. Stjepanović, and R. Šarac
Mining Institute Belgrade, Belgrade 11000 Serbia
*e-mail: slobodan.vujic@ribeograd.ac.rs
Faculty of Organizational Sciences, University of Belgrade, Belgrade, 11000 Serbia
The paper presents the single-criterion modeling of limestone supply under the conditions of the variable structure of the thermal power complex of Serbia. In the end, the paper provides an analysis of the differences between multi-attribute and single-criterion solutions.
Single-criterion optimization, supply, open-pit mine, limestone, differences between solutions
DOI: 10.1134/S1062739123050186
REFERENCES
1. Radosavljvić, М., Vujić, S., Boševski, T., Praštalo, Ž, and Jovanović, B., Single-Phase Local Optimization Model for Limestone Supply from Open Pit Mines to Heat Power Plants in Serbia, Journal of Mining Science., 2016, vol. 52, no. 4, pp. 704–711.
2. Study on the Possibility of Supplying Limestone for Flue Gas Desulfurization at the Kostolac CHP, Nikola Tesla CHP and New Thermal Facilities, Mining Institute and Tekon Belgrade, 2014.
3. Boševski, T., Vujić, S., Radosavljević, M., and Kuzmanović, M., Linear Model of Location Optimization of Limestone Exploitation and Consumption in Macedonia, Journal of Mining Science, 2019, vol. 55, no. 1, pp. 88–95.
4. Amankwah, H., Mathematical Optimization Models and Methods for Open-Pit Mining, Department of Mathematics Linkoping University, Linkoping, 2011.
5. Baloyi, V.D. and Meyer, L.D., The Development of a Mining Method Selection Model through a Detailed Assessment of Multi-Criteria Decision Methods, Elsevier, Results in Eng., 2020, vol. 8, 72 p.
6. Brans, J.P., Vincke, P., and Mareschal, B., How to Select and how to Rank Projects—The Promethee Method, European J. Operational Res., 1986, vol. 24, no. 2, pp. 228–238.
7. Dimitrijević, B., Vujić, S., Matic, I., Majianac, S., Praštalo, J., Radosavljevic, M., and Colakovic, V., Multi-Criteria Analysis of Land Reclamation Methods at Klenovnik Open Pit Mine, Kostolac Coal Basin, Journal of Mining Science, 2014, vol. 50, no. 2, pp. 319–325.
8. Hudej, M., Vujić, S., Radosavljević, M., and Ilić, S., Multivariable Selection of the Main Mine Shaft Location, Journal of Mining Science, 2013, vol. 49, no. 6, pp. 950–954.
9. Matos, P.V., Cardadeiro, E., Silva, J.A., and Muylder, C.F., The Use of Multi-Criteria Analysis in the Recovery of Abandoned Mines: A Study of Intervention in Portugal, RAUSP Management J., 2018, vol. 53, pp. 214–224.
10. Nikolić, I. and Borović, S., Multi-Criteria Optimization, Center of Military Schools of the Yugoslavian Army, Belgradе, 1996.
11. Opricović, S., Multi-Criteria System Optimization in Construction, Faculty of Civil Engineering, University of Belgrade, 1998.
12. Patyk, M., Bodziony, P., and Krysa, Y., A Multiple Criteria Decision Making Method to Weight the Sustainability Criteria of Equipment Selection for Surface Mining, Energies, 2021, vol. 14, pp. 1–14.
13. Šubaranović, T., Vujić, S., Radosavljević, M., Dimitrijević, B., Ilić, S., and Jagodić Krunić, D., Multi-Attribute Scenario Analysis of Protection of Drmno Open Pit Mine against Groundwater, Journal of Mining Science, 2019, vol. 55, no. 2, pp. 280–286.
14. Stanojevic, R., Optimization of Macroeconomic Models, Velatra, Belgrade, 2001.
15. Vujić, S., Quantitative Models for Decision-Making Support in Mining Planning and Design, Mining Institute Belgrade, 2023.
NEW METHODS AND INSTRUMENTS IN MINING
IMPROVEMENT OF LOCAL ROCKBURST CONTROL EQUIPMENT IN MINERAL MINING
I. Yu. Rasskazov*, P. A. Anikin, A. P. Grunin, D. S. Migunov, and A. A. Tereshkin
Khabarovsk Federal Research Center, Far East Branch, Russian Academy of Sciences,
Khabarovsk, 680000 Russia
*e-mail: adm@idg.khv.ru
As a result of hardware updating of Prognoz-L based on the modern electronic engineering and the accumulated experience, rock mass express-evaluator Prognoz-L.2 has been designed. The test data of the evaluator are presented as a case-study of a rockburst-hazardous mineral deposit.
Rockburst hazard, rock mass, acoustic emission, local control, algorithms, rockburst hazard prediction
DOI: 10.1134/S1062739123050198
REFERENCES
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2. Bizyaev, А.А. and Yakovitskaya, G.Е., Monitoring Dynamic Rock Pressure Events Using Improved EME Recording Instrumentation, Journal of Mining Science, 2015, vol. 41, no. 5, pp. 957–963.
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8. Rasskazov, I.Yu., Anikin, P.А., Migunov, D.S., Gladyr, А.V., Makarov, V.V., Iskra, А.Yu., Zhelnin, D.O., and Sidlyar, А.V., Improvement of Instruments for Local Rockburst Hazard Control when Mining in Difficult Geological Conditions, Mining Informational and Analytical Bulletin–GIAB, 2014, no. S4-2, pp. 22–30.
9. Rasskazov, I.Yu., Migunov, D.S., Anikin, P.А., Gladyr, А.V., Tereshkin, А.А., and Zhelnin, D.O., New-generation portable geoacoustic instrument for rockburst hazard assessment, Journal of Mining Science, 2015, vol. 41, no. 3, pp. 614–623.
10. Tereshkin, А.А., Rasskazov, I.Yu., Anikin, P.А., and Migunov, D.S., Results of Using the Geoacoustic Method of Rockburst Hazard Local Control in the Mines of the Far East, Mining Informational and Analytical Bulletin–GIAB, 2017, no. S24, pp. 338–347.
11. Rasskazov, I.Yu., Saksin, B.G., Anikin, P.A., Gladyr, A.V., Potapchuk, M.I., Usikov, V.I., Tereshkin, A.A., and Sidlyar, A.V., Methods and Technical Facilities for the Assessment of Geodynamic Risk and Geomechanical Monitoring of Burst-Hazard Rock Massif, Geomech. Geodyn. Rock Masses, 2018, vol. 1–2, pp. 1501–1506.
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13. Liang, W.Z., Sari, Y.A., Zhao, G.Y., McKinnon, S., and Wu, H., Probability Estimates of Short-Term Rockburst Risk with Ensemble Classifiers, Rock Mech. Rock Eng., 2021, vol. 54, pp. 1799–1814.
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18. Pravila bezopasnosti pri vedenii gornykh rabot i pererabotke tverdykh poleznykh iskopaemykh. FNP v oblasti promyshlennoi bezopasnosti. Utverzhdeny prikazom Rostekhnadzora 08.12.2020, no. 505 (Safety Rules for Mining and Processing of Solid Minerals. Federal Rules and Regulations in the Field of Industrial Safety. Approved by the Order of Rostekhnadzor on December 8, 2020), Moscow, 2020.
ELECTROMAGNETIC EMISSION ASSOCIATED WITH FRACTURE OF ROCK SAMPLES
A. A. Bizyaev*, A. G. Vostretsov, I. I. Smirnyagin, and M. D. Sharapova
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
*e-mail: bizyaev@yandex.ru
Novosibirsk State Technical University, Novosibirsk, 630073 Russia
The article presents the fracture test data of rock samples with the porphyroblastic, granoblastic lepidoblastic and laminated structure. The tests were carried out on lab-scale tester ASI-2. The test samples were subjected to uniaxial compression until discontinuity with synchronous recording of associated electromagnetic emission, load and displacements along the compression axis. The laminated rock samples in fracture show anisotropy of geophysical parameters and electromagnetic emission.
Dynamic events induced by rock pressure, stress–strain behavior, electromagnetic emission, lab-scale tests, rockburst prediction criteria
DOI: 10.1134/S1062739123050204
REFERENCES
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