JMS, Vol. 60, No. 3, 2024
GEOMECHANICS
PHYSICAL-MATHEMATICAL MODEL OF METHANE FLOW IN NONSTATIONARY STRESS FIELD IN COAL SEAM
M. V. Kurlenya*, K. H. Lee**, V. G. Kazantsev***, and Eun Hee Lee
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
*e-mail: kurlenya@misd.ru
VostNII Science Center, Kemerovo, 650002 Russia
**e-mail: leeanatoly@mail.ru
Industrial Safety LLC, Biysk, 659302 Russia
***wts-01@mail.ru
A physical-mathematical model of natural gas flow in methane-containing coal seams based on the concept of interaction of geomechanical and gas-dynamic factors in coal degassing process. Methane flow calculation is performed, and it is found that the cause of the decrease in the methane yield is the increase in stresses around producing wells, the change in the occlusion pressure of gas in cracks and pores, as well as the piezoconductivity of rock mass.
Modeling, coal seam, gas drainage, flow, sorption pressure, stress state, occlusion stress, piezoconductivity
DOI: 10.1134/S1062739124030013
REFERENCES
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AN APPROACH TO MODELING TROUGHS OF GROUND MOVEMENTS WITH HIGH GRADIENTS OF SUBSIDENCE
A. A. Baryakh* and N. A. Samodelkina
Mining Institute, Ural Branch, Russian Academy of Sciences, Perm, 614007 Russia
*e-mail: bar@mi-perm.ru
Within the framework of the elastoplastic model, the authors propose a theoretical description procedure for troughs of ground movements with high gradients of subsidence. The approach uses reduction of shear modulus in rock mass bordering a movement trough. The pre-requisite for the shear modulus reduction in such areas is the increased mining-induced pressure, which initiates damage and aggravates the defect structure of rocks through widening of micro-cracks, inter-grain contacts, etc. The estimation procedure of the induced reduction factor for the shear modulus uses the comparative analysis of ground slopes. This approach enables a reliable calculation of ground movements with high gradients of subsidence, and ensures the adequate stress–strain analysis of undermined rock mass, including location of plastic deformation zones.
Mineral mining, ground subsidence, movement trough, rock mass, mathematical modeling, stress–strain behavior
DOI: 10.1134/S1062739124030025
REFERENCES
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9. Kutepov, D.V., Gordienko, M.V., and Rebenok, E.V., Monitoring Movements and Deformations Above Flooded Mines, Zh. Teor. Prikl. Mekh., 2020, no. 3 (72), pp. 65–71.
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11. Tagil’tsev, S.N. and Panzhin, A.A., Geomechanical Regularities of Horizontal and Vertical Deformations of the Rock Mass in the Area of the Kachkanar Iron Ore Deposit, Mining Informational and Analytical Bulletin—GIAB, 2020, no. 3-1, pp. 235–245.
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CALCULATION OF STRESS CONCENTRATION IN INFLUENCE ZONE OF MINING FACE WITHIN GRADIENT-TYPE ELASTOPLASTIC MODELING
D. S. Zhurkina and S. V. Lavrikov*
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
*e-mail: lvk64@mail.ru
Using a gradient-type model, the authors solve a boundary-value problem on stress redistribution in rock mass during mining. The elastoplastic model takes into account local discontinuity. The condition of smoothness of the displacement field is essentially weakened—instead of one smooth field of displacements, two-dimensional kinematics is described using two independent smooth fields. As a consequence, the model receives a structural parameter including the dimension of length and characterizing local bends of unit volumes. The article gives examples of plastic strain calculations in adjacent rock mass with identification of the increased stress concentration zones. It is shown that inclusion of local bends leads, on the hand, to the reduction of plastic shears in adjacent rock mass and, on the other hand, to deeper expansion of high stress concentration zones in rock mass.
Rock mass, mining face, mathematical model, nonlocality, bend, elasticity, plastic shears, calculation, stress concentration
DOI: 10.1134/S1062739124030037
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SUBSIDENCE ANALYSIS FOR OLD ABANDONED BOARD AND PILLAR COAL MINES USING ANSYS AND MONTE CARLO SIMULATION
Akhil Avchar*, Samir Kumar Pal**, Anup Kumar Tripathi, and Gyandeep Kumar***
National Institute of Technology (NIT), Karnataka, India
*e-mail: anuptripathi@nitk.edu.in
Indian Institute of Technology Kharagpur, West Bengal State, India
**e-mail: pal.samir09@gmail.com
***e-mail: gyandeep.iitkgpgmail.com
This research paper will cover the possible causes which can lead to subsidence above old abandoned board and pillar coal mines at a shallow depth. The research includes the calculation and analysis of the factor of safety for pillars using ANSYS and Monte Carlo Simulations for ascertaining subsidence. An old abandoned coal mine of South Eastern Coalfields Ltd. (SECL, a subsidiary of Coal India Limited) was considered for the study of coal pillar fatigue and eventual crushing of pillars over a long duration of time, simulation analysis of stress and strength of coal pillars over a long period, change in behavior of factor of safety as the dimension of the pillars changes.
Subsidence, board and pillar coal mines, factor of safety, Monte Carlo Simulation, ANSYS analysis, finite element method, pillar strength
DOI: 10.1134/S1062739124030049
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ROCK FRACTURE
ABRASIVENESS ASSESSMENT OF GEOMATERIALS BY PARAMETERS OF ACOUSTIC EMISSION IN DISINTEGRATION
A. S. Voznesensky*, S. V. Mazein, V. V. Prishchepov, and Ya. O. Kutkin
National University of Science and Technology—NUST MISIS, Moscow, 119049 Russia
*e-mail: al48@mail.ru
The authors assess abrasiveness of sand with continuous acoustic emission recording during LCPC test with crushing of a 500 g sample by a straight impeller in a metal barrel. The informative parameters are the acoustic emission spectra averaged over a number of instances at different times of crushing, and over six frequency bands from 2 to 500 kHz. The obtained coefficients of multiple regression coefficients allow calculating wear of a cutting tool and the LCPC abrasion coefficient LAC for different crushing times by the averaged amplitudes of the AE spectrum components. This method is applicable in tunnel boring, hole drilling and other practices involved in real-time control of ground abrasiveness and wear of cutting tools to be replaced in a timely manner.
Abrasiveness, soil, tunnel boring machines, cutting tool, wear
DOI: 10.1134/S1062739124030050
REFERENCES
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FRACTURE OF SOLID INCLUSIONS BY PICKS
Yu. N. Linnik* and V. Yu. Linnik
State University of Management,
Moscow, 109542 Russia
*e-mail: yu_linnik@guu.ru
According to classification of coal seams with solid inclusions, all mine seams are divided into three groups subject to the size and content of the inclusions in a seam. It is found that fracture efficiency and maximal loads depend on the mineral type of inclusions. Carbonate and pyrite inclusions are fractured in a few cuts, while carbonate–pyrite inclusions are usually broken in a single cut. The loading of a pick is approximately 1.6–1.7 times higher in cutting pyrite inclusions as compared with carbonate inclusions. The authors identify five basic types of the pick–solid inclusion interaction: central and edge cut; touch; tear-out; extraction. The highest loads appear in cutting of solid inclusions and should be taken into account in designs of cutting heads and power drives of mining machines.
Coal–cement block, solid inclusions, peak cutting force, cut width and depth, mineral type of solid inclusion, orientation of pick relative to inclusion, inclusion–rock cohesion, solid inclusion tear-out
DOI: 10.1134/S1062739124030062
REFERENCES
1. Linnik, Yu.N., Linnik, V.Yu., Voronova, E.Yu., Evstratov, V.A., and Zich, A., Structure of Failures in Cutting Heads of Shearers, Ugol’, 2021, no. 4 (1141), pp. 20–24.
2. Khoreshok, A.A., Mamet’ev, L.E., Tsekhin, A.M., and Borisov, A.Yu., Present-Day Concerns on Operation of Disc Tools on Cutting Heads of Selective Mining Machines, Tekhn. Tekhnol. Gorn. Dela, 2021, no. 4 (5), pp. 40–63.
3. Myszkowski, M. and Paschedag, U., Longwall Mining in Seams of Medium Thickness Comparison of Plow and Shearer Performance under Comparable Conditions, Caterpillar, Inc., 2015. Available at: https://www.petersoncat.com/sites/cat/files/products/documents/1415805532.pdf.
4. Linnik, V.Yu., Linnik, Yu.N., Zhabin, A.B., Polyakov, A.V., and Averin, E.A., Normalizing Wear Rate of Cutter Picks of Coal Mining Machines with Respect to Operating Conditions, Ugol’, 2019, no. 12, pp. 26–30.
5. Krauze, K., Mucha, K., Wydro, T., and Pieczora, E., Functional and Operational Requirements to Be Fulfilled by Conical Picks Regarding Their Wear Rate and Investment Costs, Energies, 2021, vol. 14, no. 12, 3696.
6. Gabov, V.V., Zadkov, D.A., Nguyen Van Xuan, Hamitov, M.S., and Molchanov, V.V., To the Problem of Improvement of Working Tools of Mining Excavation Machines, Mining Informational and Analytical Bulletin—MIAB, 2022, no. 6-2, pp. 205–222.
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8. Linnik, Yu.N., Linnik, V.Yu., Zhabin, A.B., and Zich, A., Patterns of Influence Exerted by Cutting Drum Reliability and Coal Seam Properties on Cutter–Loader Capacity, Mining Informational and Analytical Bulletin—MIAB, 2021, no. 1, pp. 169–180.
9. Shishlyannikov, D.I., Ivanov, S.L., Zvonarev, I.E., and Zverev, V.Yu., Improving Efficiency of Shearing and Hauling Machines in Longwall Potash Mining, Mining Informational and Analytical Bulletin—MIAB, 2020, no. 9, pp. 116–124.
10. Cheluszka, P., Mikula, S., and Mikula, J., Conical Picks of Mining Machines with Increased Utility Properties—Selected Construction and Technological Aspects, Acta Montanistica Slovaca, 2021, vol. 26, no. 2, pp. 195–204.
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17. Sher, E.N., Numerical Evaluation of Wedge Penetration Resistance in Brittle Rock Mass with Regard to Equilibrium Propagation of Main Crack, Journal of Mining Science, 2021, vol. 57, no. 6, pp. 955–964.
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19. Bai, X., Wang, D.K., and Tian, F.C., Permeability Model of Damaged Coal Under Triaxial Stress Loading–Unloading, Chin. J. Rock Mech. Eng., 2021, vol. 40, no. 8. 1536.
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21. Zhabin, A.B., Polyakov, A.V., Averin, A.E., Linnik, Yu.N., and Linnik, V.Yu., Avenues of Developing Theory of Coal and Rock Disintegration by Cutting Tool, Ugol’, 2019, no. 9, pp. 24–28.
EFFECT OF INTER-HOLE DELAYS ON SEISMIC SAFETY WITH REGARD TO FIRING TIME DEVIATION
Al. A. Galim’yanov*, A. V. Rasskazova, I. V. Korneev, V. I. Mishnev, and E. N. Kazarina
Institute of Mining, Far Eastern Branch, Russian Academy of Sciences,
Khabarovsk, 680000 Russia
*e-mail: azot-1977@mail.ru
The article studies effect of expedient inter-hole delays on seismic safety of blasting in open pit mining. The actual delays in non-electric initiation systems are measured instrumentally, and the results are processed using computer modeling. The domestic and foreign information on deviation of the actual and design delays is reviewed. The computations prove the increase in the factor of seismic safety in blasting with longer inter-hole delays. Additional instrumental measurements of seismic vibrations should be performed to evaluate actual blast patterns at a full and lab scale, with the analysis of quality of rock fragmentation by blasting.
Delay, firing system assembly chart, delay measurement, computer modeling of blast patterns, standard deviation, seismic safety, broken rock mass quality
DOI: 10.1134/S1062739124030074
REFERENCES
1. Galim’yanov, A.A., Shevkun, E.B., Kabirov, A.R., and Kazarina, E.N., Factor of Enlarged Volume of Blasting Block, Ugol’, 2023, no. 10 (1172), pp. 104–108.
2. Cherskikh, O.I., Galim’yanova, A.A., and Gevalo, K.V., Improvement of Drilling and Blasting at the Solntsevsky Open Pit Coal Mine, Ugol’, 2022, no. 7 (1156), pp. 45–52.
3. Mashukov, I.V., Domanov, V.P., Serg, A.G., and Egorov, D.A., Calculation of Safe Distances by Blasting-Induced Seismic Impact Criterion for Buildings and Structures with Regard to Blasting Patterns, Vest. Nauch. Tsentra Bezop. Gorn. Rabot Ugol’n. Prom., 2013, no. 1–2, pp. 16–22.
4. Shevkun, E.B., Leshchinsky, A.V., Dobrovol’skaya, A.I., and Galim’yanov, A.A., Razrabotka sblizhennykh naklonnykh plastov kamennogo uglya v raznoprochnykh i merzlykh vmeshchayushchikh porodakh (Mining of Closed-Space and Inclined Coal Seams in Different-Strength Rocks and Permafrost), Moscow: Gornaya kniga, 2019.
5. Galim’yanov, A.A., Rudnitsky, K.A., Gil’denbrant, K.V. et al., Influence of Inter-Hole Detonator Parameters on Detonation Velocity of Explosive Mixtures, Gorn. Prom., 2023, no. 3, pp. 130–133.
6. Kucheryavy, F.I., Drukovanny, M.F., and Gaek, Yu.V., Korotkozamedlennoe vzryvanie na kar’erakh (Short-Delay Blasting in Open Pit Mines), Moscow: Gosgortekhizdat, 1962.
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10. Pokrovsky, G.I., Vzryv (Blast), Moscow: Nedra, 1980.
11. Graya, J.P. and Monaghan, J.J., Numerical Modeling of Stress Fields and Fracture around Magma Chambers, J. Volcanology Geotherm. Res., 2004, vol. 135, pp. 259–283.
12. Mineev, S.P., Shipovsky, I.E., Kiselev, V.V., and Gulai, A.A., Modeling Outburst-Hazardous Rock Mass Behavior in Blasting in Heading, Geotekh. Mekhanika, 2015, no. 123, pp. 26–39.
13. Viktorov, S.D., Zakalinsky, V.M., Mingazov, R.Ya., and Shipovsky, I.E., Methodology of Minimization of Adverse Technological Risks and Phenomena in Integrated Subsoil Use, Probl. Nedropol’z., 2021, no. 1 (28), pp. 21–27.
14. Lysak, Yu.A., Plotnikov, A.Yu., Shevkun, E.B., and Leshchinsky, A.V., Loose Blasting of Rocks at Quarries of the Petropavlovsk Group of Companies, Gornyi Zhurnal, 2022, no. 2, pp. 45–50.
15. Shevkun, E.B., Leshchinsky, Lysak, Yu.A., and Plotnikov, A.Yu., Features of Explosive Loosening at the Increased Intervals of Delay, Mining Informational and Analytical Bulletin—MIAB, 2017, no. 4, pp. 272–282.
16. Shevkun, E.B. and Plotnikov, A.Yu., Influence of Blasting Patterns on Processes in Pre-Fracture Zones, Marsheider. Nedropol’z., 2020, no. 3 (107), pp. 23–34.
17. Instruktsiya po primeneniyu ustroistv, initsiiruyushchikh s zamedleniem shpurovykh Iskra-Sh (Delayed Blasthole Initiators Iskra-Sh: Manual), 2009.
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23. Trubetskoy, K.N., Zakharov, V.N., Viktorov, S.D., Zharikov, I.F., and Zakalinsky, V.M., Rock Fracture by Blasting in Subsoil Use, Probl. Nedropol’z., 2014, no. 3, pp. 80–95.
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25. Samusaev, P.A., Novin’kov, A.G., Protasov, S.I., and Zav’yalov, A.N., Comparative Assessment of Massive Blasting-Induced Seismic Impact with Different Initiation Systems, Vzryv. Delo, 2023, no. 141/98, pp.107–130.
26. Basarnov, A.I. and Batrakov, D.N., Firing Time Tests of Nonelectric Initiation Systems at Test Sites, Vestn. Nauch. Tsentra VostNII Prom. Ekol. Bezop., 2023, no. 1, pp. 27–37.
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28. Men’shikov, P.V., Sinitsyn, V.A., and Shemenev, V.G., Actual Delay Estimation Procedure for Efficiency Blasting Patterns Using Electronic Initiation System Daveytronic, Usp. Sovr. Estestvozn., 2016, no. 3, pp. 183–189.
29. Belin, V.A., Gorbonos, M.G., Mangush, S.K., and Ekvist, B.V., New Blasting Technologies, Mining Informational and Analytical Bulletin—MIAB, 2015, Special Issue 1, pp. 87–102.
30. Tyupin, V.N. and Khaustov, V.V., Geomechanical Behavior of Jointed Rock Mass versus Delay Interval in Seismic Load Zone of Large-Scale Blasts, Mining Informational and Analytical Bulletin—MIAB, 2021, no. 2, pp. 45–54.
31. Silva, J., Li, L., and Gernand, J.M. Reliability Analysis for Mine Blast Performance Based on Delay Type and Firing Time, Int. J. Min. Sci. Technol., 2018, vol. 28, no. 2, pp. 195–204.
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33. Wu, H. and Gong, M., Calculation and Application of Hole by Hole Blasting Vibration Superposition Based on Measured Delay Times of Detonators, Explosion and Shock Waves, 2019, vol. 39, no. 2. 025202.
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35. Yakovlev, A.V., Shimkin, E.S., and Perekhod, T.M., Key Research Areas and Results in Hard-Shot Rock Fragmentation, Probl. Nedropol’z., 2019, no. 3 (22), pp. 137–144.
36. Tyupin, V.N., Seismically Safe Delays in Confined Space Blasting of Dry Rocks, Vzryv. Delo, 2023, no. 141/98, pp. 151–167.
37. Wu, H. and Gong, M., Calculation and Application of Hole by Hole Blasting Vibration Superposition Based on Measured Delay Times of Detonators, Explosion Shock Waves, 2019, vol. 39, no. 2. 025202.
ESTIMATION OF UNIAXIAL COMPRESSIVE STRENGTHS OF CAPPADOCIA PYROCLASTIC ROCKS AFTER FREEZE–THAW CYCLES USING POINT LOAD STRENGTH INDEX
Ismail Ince, Mehmet Can Balc?*, and Mustafa Fener
Konya Technical University, Konya, 42250 Turkey
Batman University, Batman, 72000 Turkey
*e-mail: mehmetcan.balci@batman.edu.tr
Ankara University, Ankara, 06830 Turkey
In this study, the change in the strength value of 11 pyroclastic rocks from the Cappadocia region, where pyroclastic rocks are commonly found, using the freeze–thaw (F–T) test was investigated after applying 5, 10, 15, 20 and 30 F–T cycles. The uniaxial compressive strength (UCS) of the samples after applying the F–T cycle was estimated using the point load test (PLT) values. With the developed empirical relationship, it was identified that the PLT values predicted UCS with a high correlation coefficient of 0.8663.
Cappadocia region, pyroclastic rocks, freeze–thaw cycles, point load test, uniaxial compressive strength, estimation
DOI: 10.1134/S1062739124030086
REFERENCES
1. Fener, M. and Ince, I., Effects of the Freeze–Thaw (F–T) Cycle on the Andesitic Rocks (Sille-Konya/Turkey) Used in Construction Building, J. Afr. Earth. Sci., 2015, vol. 109, pp. 96–106.
2. Chen, T.C, Yeung, M.R, and Mori, N., Effect of Water Saturation on Deterioration of Welded Tuff due to Freeze-Thaw Action, Cold. Regions. Sci. Technol., 2004, vol. 38, pp. 127–136.
3. Ozbek, A., Investigation of the Effects of Wetting–Drying and Freezing–Thawing Cycles on Some Physical and Mechanical Properties of Selected Ignimbrites, Bull. Eng. Geol. Environ., 2014, vol.73, no. 2, pp. 595–609.
4. Akin, M., Ozvan, A., Dincer, I., and Topal, T., Evaluation of the Physico-Mechanical Parameters Affecting the Deterioration Rate of Ahlat Ignimbrites (Bitlis, Turkey), Environ. Earth Sci., 2017, vol.76, no. 24, pp. 1–22.
5. Akbulut, Z.F., Investigation of the Change in Physical, Mechanical, and Microstructural Properties of Ahlat Ignimbrites under the Effect of Environment and Freeze-Thawing, Arabian J.Geosci., 2022, vol. 15, no. 6, pp. 1–11.
6. Torok, A., Forgo, L.Z., Vogt, T., Lobens, S., Siegesmund, S., and Weiss, T., The Influence of Lithology and Pore-Size Distribution on the Durability of Acid Volcanic Tuffs, Hungary Geol. Soc., 2007, vol. 271, no. 1, pp. 251–260.
7. Momeni, A., Abdilor, Y., Khanlari, G.R., Heidari, M., and Sepahi, A.A., The Effect of Freeze–Thaw Cycles on Physical and Mechanical Properties of Granitoid Hard Rocks, Bull. Eng. Geol. Environ., 2016, vol. 75, no. 4, pp. 1649–1656.
8. Hashemi, M., Khabbazi Basmenj, A., and Banikheir, M., Engineering Geological and Geoenvironmental Evaluation of UNESCO World Heritage Site of Meymand Rock-Hewn Village, Iran Environ. Earth Sci., 2018, vol. 77, no. 1, pp. 1–23.
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11. Ince, I. and Fener, M., A Prediction Model for Uniaxial Compressive Strength of Deteriorated Pyroclastic Rocks due to Freeze–Thaw Cycle, J. Afr. Earth. Sci., 2016, vol. 120, pp. 134–140.
12. Altindag, R., Alyildiz, I.S., and Onargan, T., Mechanical Property Degradation of Ignimbrite Subjected to Recurrent Freeze–Thaw Cycles, Int. J. Rock Mech. Min. Sci., 2004, vol. 41, no. 6, pp. 1023–1028.
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MINERAL MINING TECHNOLOGY
IMPROVEMENT OF GOLD-BEARING SAND MINING AND PROCESSING AT STRUCTURALLY COMPLEX PLACERS
A. Yu. Cheban
Institute of Mining, Far Eastern Branch, Russian Academy of Sciences, Khabarovsk, 680000 Russia
e-mail: chebanay@mail.ru
Equipment of open pit placer mining is examined. The process designs of incremental end-to-end gold recovery from placer sands are substantiated. In structurally complex extraction blocks, stripping is carried out first, and then, the limits of rich sand pockets are adjusted during the second-phase denser-grid exploration. Different-grade sands are extracted selectively. Extraction and transport of standard-grade and low-grade sands, which are the bulk of an operating block, is implemented by heavy-duty bulldozes; the standard-grade sands are sent to sluicing, and the low-grade sands are used to make heap leaching piles. High-grade sands, which make a small volume of an operating block, are transported to a multi-stage processing facility for the high-efficiency gold recovery. Tailings of standard-grade and high-grade sand processing, with mainly fine and very fine gold content, go to heap leaching.
Structurally complex block, high-grade sand areas, separate processing, sluice box beneficiation, heap leaching, resource saving
DOI: 10.1134/S1062739124030098
REFERENCES
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34. Batugin, S.A. and Chernyi, E.D., Teoreticheskie osnovy oprobyvaniya i otsenki zapasov mestorozhdenii (Theoretical Framework of Mineral Assaying and Appraisal), Novosibirsk: Nauka, 1998.
STABILITY ANALYSIS OF PILLARS IN UNDERGROUND LIMESTONE MINE USING THREE-DIMENSIONAL SCANNING TECHNIQUES
Donghui Kim*, Gyoungman Kim, and Hwanjo Baek
Institute of Industrial Technology, Kangwon National University, Gangwon-do, 24341 Republic of Korea
*e-mail: donghui8714@naver.com
Institute of Mineral and Energy Resources, Daejeon, Republic of Korea
Department of Energy and Resources Engineering, Kangwon National University,
Gangwon-do, 24341 Republic of Korea
In this study, point cloud data were obtained from an underground limestone mine using a laser scanner. A numerical analysis was performed using discontinuous and continuous models, and the stability of two pillars located in large underground openings was analyzed. The safety factor was 1.0 or higher in both analyses, and the displacement was insignificant compared to the pillar size, confirming the pillar stability. Additionally, the safety factor of the discontinuous model was reduced by approximately 30% compared to that of the continuous model, and the displacement was increased by approximately 40%. The change in the safety factor was examined by applying the minimum, average and maximum mechanical properties of the investigated rock mass. The analysis determined that an average change of 50% occurred in the safety factor when the minimum and maximum mechanical properties of the rock mass were compared.
Laser scanner, point cloud data, numerical analysis, safety factor, displacement
DOI: 10.1134/S1062739124030104
REFERENCES
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2. Jia, H. and Xue, J., The Stability Study of Goaf based on C-ALS Data Point Cloud and FLAC3D Coupled Modeling, E3S Web of Conference, 2021, vol. 261, p. 03053.
3. Riquelme, A.J., Tomas, R., and Abellan, A., Characterization of Rock Slope through Slope Mass Rating Using 3D Point Clouds, J. Rock Mech. Min. Sci., 2016, vol. 84, pp. 165–176.
4. Kajzar, V., Kukutsch, R., and Heroldova, N., Verifying the Possibilities of Using a 3D Laser Scanner in the Mining Underground, Acta Geodyn. Geomater., 2015, vol. 12, no. 1, pp. 51–58.
5. Huber, D.F. and Vandapel, N., Automatic Three-Dimensional Underground Mine Mapping, Int. J. Robot. Res., 2006, vol. 25, no. 1, pp. 7–17.
6. Monsalve, J.J., Baggett, J., Bishop, R., and Ripepi, N., Application of Laser Scanning for Rock Mass Characterization and Discrete Fracture Network Generation in an Underground Limestone Mine, Int. J. Min. Sci. Technol., 2019, vol. 29, no.1, pp. 131–137.
7. Chen, S., Walske, M.L., and Davies, I.J., Rapid Mapping and Analyzing Rock Mass Discontinuities with 3D Terrestrial Laser Scanning in the Underground Excavation, Int. J. Rock Mech. Min. Sci., 2018, vol. 110, pp. 28–35.
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SCIENCE OF MINING MACHINES
INVESTIGATION AND DESIGN OF HYDROPERCUSSION MECHANISMS FOR OPERATIVE ATTACHMENTS OF MINING MACHINES
L. V. Gorodilov*, D. I. Simisinov, A. N. Korovin, and V. G. Kudryavtsev
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
*e-mail: gor@misd.ru
Ural State Mining University, Yekaterinburg, 620144 Russia
For the operative bucket of a 2nd size-group hydraulic excavator, the impact capacity of percussion mechanisms, required for cutting rocks with the compression strength up to 60–80 MPa, is determined. The structure and parameters of hydropercussion mechanisms are chosen. The proposed inter-connection for the hydropercussion mechanisms and the hydraulic power station contains activation valves for each of the mechanisms, and a pressure reducing valve at the inlet. A simulation model of the system of hydropercussion mechanisms is built, and the performance and characteristics of the model are calculated at different rates of power fluids and pressures of the reducing valve. The authors prove the efficiency of the proposed design and connection of hydropercussion mechanisms in the excavator hydraulics and validate the adjustability of the impact capacity of the mechanisms through setting-up of pressure of the reducing valve.
Hydraulic excavator, operative attachment, hydropercussion mechanism, operational cycle, impact capacity
DOI: 10.1134/S1062739124030116
REFERENCES
1. Mattis, A.R., Kuznetsov, V.I., Vasil’ev, E.I., et al., Ekskavatory s kovshom aktivnogo deistviya: opyt sozdaniya, perspektivy primeneniya (Excavators with Operative Buckets: Design Experinece and Application Prospects), Novosibirsk: Sib. Izdat RAN, 1996.
2. Mattis, A.R., Cheskidov, V.I., and Yakovlev, V.L., Bezvzryvnye tekhnologii otkrytoi dobychi tverdykh poleznykh iskopaemykh (Blast-Free Technologies of Open Pit Mineral Mining), Novosibirsk: SO RAN, 2007.
3. Shishaev, S.V., Fedulov, A.I., and Mattis, A.R., Raschet i sozdanie kovsha aktivnogo deistviya (Desing and Manufacture of Operative Bucket), Novosibirsk: IGD SO AN SSSR, 1989.
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6. Kichigin, A.F. and Safankov, Yu.A., Ground Tests of Operative Bucket of Excavator E-652, Stroitl’no-dorozhnye mashiny i mekhanizmy (Machines and Mechnisms for Road Construction), Karaganda: KPTI, 1972, pp. 42–45.
7. Yantsen, I.A., Ovcharov, M.S., and Safankov, Yu.A., Parameters of Intermediate Hydro-Pneumo-Accumulation Drive of Operative Excavator Bucket, Stroitl’no-dorozhnye mashiny i mekhanizmy (Machines and Mechnisms for Road Construction), Karaganda: KPTI, 1972, pp. 186–190.
8. Galdin, N.S. and Bedrina, E.A., Kovshi aktivnogo deistviya dlya ekskavatorov (Operative Buckets for Excavators), Omsk: SibADI, 2003.
9. Galdin, N.S. and Semenova, I.A., Avtomatizirovannoe modelirovanie gidroudarnogo oborudovaniya dlya ekskavatorov (Autromated Modeling of Hydropercussion Equipment for Excavators), Omsk: SibADI, 2008.
10. Gorodilov, L.V., Korovin, A.N., Kudryavtsev, V.G., and Pershin, A.I., Structural Layout and Parameters of Hydroimpactors for End Effectors of Mining Machines, Journal of Mining Science, 2023, vol. 59, no. 1, pp. 82–90.
11. Operating Characteristics of Loading Excavator New Holland B115. Available at: https://atkes.ru/index.php/ stati-po-remontu/221-new-holland-b115.
12. Gorodilov, L.V. and Kudryavtsev, V.G., Experimental Analysis of Slide Throttle Valve Dynamics, Journal of Mining Science, 2023, vol. 59, no. 4, pp. 595–603.
BENCH TESTING OF BOREHOLE ELECTROMAGNETIC IMPULSIVE SOURCE OF VIBRATIONS
A. O. Kordubailo*, B. F. Simonov, and A. A. Leutkin
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
*e-mail: Kordubaylo_ao@mail.ru
A bench tester is designed for the examination and investigation of a borehole impulsive source of vibrations, composed of an electromagnetic impact block and hydraulic power units. The bench tester simulates operation of the vibration source in an oil well, at the depths greater than 1000 m, with automated pressure control in the system. The implemented research allowed reaching the failure-free operation time of the vibration source in the well up to 150 h and longer, determining the ranges of the impact frequency and energy adjustment depending on the feed voltage, and recommending the operating frequency of the source to ensure proofness of cement stone of the well casing. The obtained nomograms enable correlating the maximal duty cycle of the borehole impulsive vibration source with the coil current density and the heat transfer coefficient to maintain temperature balance of the hammer at permissible temperature of electromagnets.
Borehole vibration source, electromagnetic impact drive, hydraulic power unit, automated shut-off, protection system, fluid pressure, current, voltage
DOI: 10.1134/S1062739124030128
REFERENCES
1. Gazizov, A.A., Uvelichenie nefteotdachi neodnorodnykh plastov na pozdeni stadia razrabotki (Enhanced Oil Recovery at a Late Stage of Development), Moscow: Nedra-Biznestsentr, 2002.
2. Ganiev, O.R., Ganiev, R.F., and Ukrainskiy, L.E., Basic Wave Mechanics of Productive Reservoirs, Dokl. AN, 2016, vol. 466, no. 3, pp. 298–301.
3. Simkin, E.M., Kuznetsov, O.L., and Chilingar, G.V., Fizicheskie osnovy akusticheskogo i vibratsionnogo vozdeistviya na neftyanye i gazovye kollektory (Basic Physics of Acoustic and Vibratory Effect on Oil and Gas Reservoirs), Moscow: Mir, 2000.
4. Dyblenko, V.P., Marchukov, E.Yu., Tufanov, I.A., Sharifullin, R.Ya., and Evchenko, V.S., Volnovye tekhnologii i ikh ispol’zovanie pri razrabotke mestorozhdenii nefti s trudnoizvlekaemymi zapasami (Wave Technologies and Applications at Scavenger Oil Reservoir Development), Moscow: RAEN, 2012.
5. Kravtsov, Ya.I. and Marfin, E.A., Wave-Induced Effect on Productive Strata as a Universal Method of Enhanced Recovery of Heavy Oil and Natural Bitumen, Georesursy, 2011, no. 3, pp. 17–18.
6. Oparin, V.N., Simonov, B.F., Yushkin, V.F., Vostrikov, V.I., Pogarsky, Yu.V., and Nazarov, L.A., Geomekhanicheskie i tekhnicheskie osnovy uvelicheniya nefteotdachi plastov v vibrovolnovykh tekhnologiyakh (Geomechanical and Technical Basics of Enhanced Oil Recovery in Vibro-Wave Technologies), Novosibirsk: Nauka, 2010.
7. Abdukamov, O.A., Serebryakova, L.N., and Tastemirov, A.R., Experience of Application of Impact and Wave Effects on Bottomhole in Injection Wells in Western Kazakhstan, SOCAR Рroceedings, 2017, no. 1, pp. 62–69.
8. Simonov, B.F., Oparin, V.N., Kordubailo, A.O., and Vostrikov, V.I., Field Research of Generation Efficiency of Downhole Pulse Vibratory Source, MIAB, 2019, no. 8, pp. 180–189.
9. Kamelin, A., Automated Control of Bench Tester of Downhole Electric Drive, Sovr. Tekhnol. Avtomatiz., 2004, no. 3, pp. 52–55.
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11. Aksenov, S.V., et al., RF patent no. 2638046, Byull. Izobret., 2017, no. 35.
12. Simonov, B.F., Kordubailo, A.O., Neiman, V.Yu., and Polishchuk, A.E., Processes in Linear Pulse Electromagnetic Motors of Downhole Vibration Generators, Journal of Mining Science, 2018, vol. 54, no. 1, pp. 61–68.
13. Simonov, B.F., Kordubailo, A.O., Grachev, A.E., Leutkin, A.A., and Pozdnyakova, E.M., Thermal Processes in Electromagnetic Percussion Assembly of Downhole Pulse Vibration Exciter, Journal of Mining Science, 2022, vol. 58, no. 6, pp. 1016–1023.
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OPERATION FACTORS OF PNEUMATIC HAMMER WITH REDUCED VOLUME FRONT CHAMBER
I. V. Tishchenko and V. V. Chervov*
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
*e-mail: vchervov@yandex.ru
The methods of increasing energy and operation parameters of a pneumatic hammer with an air distribution valve are reviewed. The algorithm of restructuring impact capacity of a pneumatic hammer with an elastic ring valve in the back stroke chamber of the hammer piston is proposed: it is suggested to use a feed source with an increased-pressure energy carrier. The algorithm was employed in designing and manufacturing a prototype model of the hammer. The actual operation factors of the prototype model are determined on a lab-scale bench tester: impact energy, impact frequency, energy source flow rate. After processing of indicator pressure charts, compressed air flow rate per unit energy output is assessed.
Pneumatic hammer, impact capacity, elastic valve, compressed air pressure, impact frequency, energy source flow rate, impact energy
DOI: 10.1134/S106273912403013X
REFERENCES
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MINERAL DRESSING
THE USE OF HYPERCROSSLINKED POLYSTYRENE SORBENTS IN EXTRACTION OF VALUABLE COMPONENTS FROM NITRIC ACID LEACH SOLUTIONS OF EUDIALYTE CONCENTRATE
V. A. Chanturia and M. V. Ryazantseva*
Academician Melnikov Institute of Comprehensive Exploitation of Mineral Resources–IPKON,
Russian Academy of Sciences, Moscow, 111020 Russia
*e-mail: ryzanceva@mail.ru
The article describes the experimental results of using synthetic sorbents made of hypercrosslinked polystyrene copolymers with divinylbenzene and vinylpyridine for recovery and separation of valuable components (Zr, Σ REE) from pregnant solutions of nitric acid leach of eudialyte. It is found that at the stage of Zr and Σ REE recovery from pregnant solutions, the most effective are resin Puromet MTS 9500 and bifunctional strongly acidic cation exchanger Purolite C160. Regarding Puromet MTS 9500, a flowsheet of step-by-step gradient elution of the sorbent saturated with valuable component is proposed. The flowsheet enables the outlet solutions of Zr and Σ REE at the recovery of 97.7 and 81.1%, respectively. Efficient separation of REE to subgroups is reached with resin VP-3AP.
Hypercrosslinked polystyrene sorbents, pregnant nitric acid leach solution, eudialyte concentrate, rare earth elements, selective recovery
DOI: 10.1134/S1062739124030141
REFERENCES
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6. Khimicheskie, sorbtsionnye i ekstraktsionnye metody polucheniya i ochistki redkikh metallov (Chemical, Sorption and Extraction Methods for the Production and Purification of Rare Metals), Moscow: Giredmet, 1978.
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11. Elrikh, G.V. and Lisichkin, G.V., Sorption in the Chemistry of Rare Earth Elements, Zhurnal Obshchei Khimii, 2008, vol. 87, no. 6, pp. 1001–1018.
12. Chanturia, V.A., Minenko, V.G., Samusev, А.L., Koporulina, Е.V., and Ryazantseva, М.V., Zirconium and Rare Earths Recovery from Eudialyte Concentrate Leaching Solution, Journal of Mining Science, 2020, vol. 56, no. 4, pp. 631–641.
13. Chanturia, V.A., Minenko, V.G., Koporulina, Е.V., Ryazantseva, М.V., and Samusev, А.L., Influence of Acids on Extraction Efficiency of Zirconium and Rare Earth Metals in Eudialyte Concentrate Leaching, Journal of Mining Science, 2019, vol. 55, no. 6, pp. 984–994.
14. Chanturia, V.A., Bunin, I.Zh., Ryazantseva, М.V., Chanturia, Е.L., Samusev, А.L., Koporulina, Е.V., and Anashkina, N.Е., Intensification of Eudialyte Concentrate Leaching by Nanosecond High-Voltage Pulses, Journal of Mining Science, 2018, vol. 54, no. 4, pp. 646–655.
15. Lyzova, Е.V., Separation and Concentration of Actinides from Nitric Acid Solutions Using Ion Exchange Materials, Cand. Tech. Sci. Thesis, Ozersk, 2015.
ADSORPTION OF RARE EARTH ELEMENTS AT MODIFIED SAPONITE
V. A. Chanturia, V. G. Minenko, A. L. Samusev*, G. A. Kozhevnikov, and E. V. Koporulina
Academician Melnikov Institute of Comprehensive Exploitation of Mineral Resources–IPKON,
Russian Academy of Sciences, Moscow, 111020 Russia
*e-mail: Andrey63vzm@mail.ru
Lomonosov Moscow State University, Moscow, 119991 Russia
The authors justify theoretically and experimentally the promising modification methods for saponite—pillaring and thermal treatment. These methods ensure production of sorbents with high capacity of cation exchange relative to cations of rare earth elements. The mechanism of pillaring and thermal treatment of saponite-bearing products at the temperature of 625 °C includes expansion of the mineral layers, generation of additional acid and oxidation–reduction centers (pillaring), as well as restructuring with formation of meta stable phases (thermal treatment). Optimization of application parameters of the sorbent (pH, sorbent-to-solution ratio) ensures efficient recovery of some REE from pregnant solutions of eudialyte concentrate leaching at the adsorption capacity up to 18.8 mg/g.
Rare earth elements, adsorption, modified saponite, static exchange capacity
DOI: 10.1134/S1062739124030153
REFERENCES
1. Elrikh, G.V. and Lisichkin, G.V., Sorption in the Chemistry of Rare Earth Elements, Zhurnal Obshchei Khimii, 2017, vol. 87, no. 6, pp. 1001–1027.
2. Polyakov, Е.G., Metallurgiya redkozemel’nykh metallov (Metallurgy of Rare Earth Metals), Moscow: Metallurgizdat, 2018.
3. Plaskin, I.N., Ionnyi obmen i ekstraktsiya v protsessakh pererabotki rud. Ionoobmennye i ekstraktsionnye metody v khimiko-obogatitel’nykh protsessakh (Ion Exchange and Extraction in Ore Processing. Ion Exchange and Extraction Methods in Chemical Processing), Moscow: Nauka, 1965.
4. Bochkarev, E.P., Khimicheskie, sorbtsionnye i ekstraktsionnye metody polucheniya i ochistki redkikh metallov (Chemical, Adsorption and Extraction Methods for the Production and Purification of Rare Metals), Moscow: Giredmet, 1978.
5. Bochkarev, E.P., Issledovanie protsessov polucheniya redkikh i redkozemel’nykh metallov i ikh soedinenii (Study of Processes for Producing Rare and Rare Earth Metals and their Compounds), Moscow: Giredmet, 1989.
6. Lokshin, E.P., Tareeva, О.А., Ivanenko, V.I., Korneykov, R.I., and Elizarova, I.R., Study of Sorption Recovery of Rare Earth Elements from Sulfuric Acid Solutions, Khimicheskaya Tekhnologiya, 2011, no. 12, pp. 749–754.
7. Marcus, Y. and Nelson, F., Anion Exchange Studies. XXV. The Rare Earths in Nitrate Solutions, Phys. Chem., 1959, vol. 63, pp. 77–79.
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9. Masloboev, V.А., Lebedev, V.N., and Smirnova, I.P., Tekhnologiya redkozemel’noi produktsii iz mineral’nogo syr’ya Kol’skogo poluostrova. Novye tekhnologii dlya kompleksnogo ispol’zovaniya prirodnykh resursov Severa (Technology of Rare Earth Products from Minerals of the Kola Peninsula. New Technologies for the Integrated Use of Natural Resources in the Russian North), Apatity, 1994.
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15. Minenko, V.G., Samusev, А.L., Selivanova, Е.А., Bayurova, Yu.L., Silikova, А.R., and Makarov, D.V., Study of Copper Ion Adsorption by Electrochemically Modified Saponite, Mineralogiya Tekhnogeneza, 2017, no. 18, pp. 190–199.
16. Chanturiya, V., Masloboev, V., Makarov, D., Nesterov, D., Bajurova, J., Svetlov, A., and Men’shikov, Y., Geochemical Barriers for Environmental Protection and Recovery of Nonferrous Metals, J. Env. Sci. Health, Part A, 2014, vol. 49, no. 12, pp. 1409–1415.
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18. Chanturia, V.A. and Minenko, V.G., Secondary Products Obtained from Saponite-Bearing Process Water: Theoretical and Experimental Justification, Journal of Mining Science, 2023, vol. 59, no. 6, pp. 965–976.
19. Minenko, V.G., Adsorption Properties of Modified Saponite in Removal of Heavy Metals from Process Water, Journal of Mining Science, 2021, vol. 57, no. 2, pp. 298–306.
20. Chanturia, V.A., Minenko, V.G., Samusev, А.L., Koporulina, Е.V., and Ryazantseva, М.V., Zirconium and Rare Earths Recovery from Eudialyte Concentrate Leaching Solution, Journal of Mining Science, 2020, vol. 56, no. 4, pp. 631–641.
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22. Stumpf, T., Bauer, A., Coppin, F., Fanghanel, T., and Kim, J., Inner-Sphere, Outer-Sphere and Ternary Surface Complexes: A TRLFS Study of the Sorption Process of Eu(III) onto Smectite and Kaolinite, Radiochim. Acta, 2002, vol. 90, no. 6, pp. 345–349.
EFFECT OF MODIFIED POLYVINYL CAPROLACTAM ON GOLD RECOVERY FROM FINE SLIME IN GOLD ORE FLOTATION
T. N. Matveeva*, V. V. Getman, and A. Yu. Karkeshkina
Academician Melnikov Institute of Comprehensive Exploitation of Mineral Resources–IPKON,
Russian Academy of Sciences, Moscow, 111020 Russia
*e-mail: ipkon@inbox.ru
The authors investigate a new reagent—modified water-soluble polymer of polyvinyl caprolactam (PVCL)—as a collector in flotation of gold-bearing sulfide ore. Modified PVCL is obtained by solid-phase modification of poly(N-vinyl caprolactam) by thiourea. The electron scan and laser microscopy identified adsorption of PVCL at gold grains applied artificially to the surface of polished sections of pyrite. It is found that PVCL facilitates selective aggregation of gold-bearing minerals from fine slime, and more than 99% of gold goes from fine slime to sand at the content of 3.54 g/t. The use of PVCL together with butyl potassium xanthate (PVCL 30 g/t, BPX 200 g/t) in flotation of finely ground gold-bearing ore from the Olimpiada deposit improved the quality of the concentrate: gold content increased from 19.9 to 29.5 g/t and gold recovery increased from 81 to 95%. The joint application of modified PVCL and BPX results in the gold recovery higher by 14%, concentrate quality improved 1.5 times and in the gold content of tailings reduced to 0.15 g/t.
Flotation, ore flotation, flocculation, reagents, water-soluble polymers, modified polyvinyl caprolactam, gold, slime, finely ground ore
DOI: 10.1134/S1062739124030165
REFERENCES
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15. Zinchenko, Z.А. and Tyumin, I.А., Study of Gold Recovery from Flotation Tailings of Ore from the Lower Level of the Dzhidzhikrus Deposit Using Thiourea, DAN Respubliki Tadzhikistan, 2013, vol. 56, no. 10, pp. 796–799.
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MAGNETIC HYDROCYCLONING OF WEAKLY MAGNETIC MINERAL SLIME
A. A. Lavrinenko* and P. A. Sysa
Academician Melnikov Institute of Comprehensive Exploitation of Mineral Resources–IPKON,
Russian Academy of Sciences, Moscow, 111020 Russia
*e-mail: lavrin_a@mail.ru
The authors validate the use of magnetic hydrocycloning in extraction of weak magnetic-responsive slime particles from finely dispersed magnetic suspension. Efficiency of a lab-scale magnetic hydrocyclone with regular electromagnetic system of copper wires on the cone, without superconductive materials involved, in extraction of magnetite particles –20 µm in size is described. The test results prove recoverability of hematite and other weakly magnetic minerals in magnetic hydrocycloning at the required flux density of 2–10 T created by a superconductive magnetic system under conditions of cooling at the liquid nitrogen temperature, which minimizes energy intake of magnetic separation. The use of the superconductive magnetic system and high-temperature materials on the hydrocyclone cone enables efficient extraction of weakly magnetic particles, for instance, red mud –10 µm in size.
Magnetic hydrocyclone, slime, magnetite, iron ore material beneficiation, flux density, iron content, iron recovery
DOI: 10.1134/S1062739124030177
REFERENCES
1. Zinoveev, D.V., Grudinskiy, P.I., Dyubanov, V.G., Kovalenko, L.V., and Leont’ev, L.I., Review of Global Practices in Red Mud Processing. Part 1. Pyrometallurgical Methods, Chernaya Metallurgiya, 2018, vol. 61, no. 11, pp. 843–858.
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MONITORING SYSTEMS IN MINING
DETERMINATION OF INFORMATIVE FREQUENCY RANGE IN SEISMIC NOISE IN THE METHOD OF REMOTE APPRAISAL OF HYDROCARBON RESERVOIRS
I. Ya. Chebotareva
Institute of Oil and Gas Problems, Russian Academy of Sciences, Moscow, 119333 Russia
e-mail: irinache@inbox.ru
The article describes a solution to the problem connected with the earlier proposed method of remote appraisal of hydrocarbon reservoirs by passive seismic. It is shown that a linearity only appears in a certain frequency range and fails fast when the latter expands. It is found that the linearity is connected with the non-Gaussian behavior of seismic noise in the isolated specific frequency range. The author proposes a method to asses an informative frequency range using experimental data, polyspectral analysis and surrogate time series.
Seismic background noise, oil, gas, rocks, thermodynamic indicator, bicoherence, surrogate time series
DOI: 10.1134/S1062739124030189
REFERENCES
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ANALYSIS OF UNDERMINED GROUND SURFACE MOVEMENTS AT THE ATASU IRON ORE DEPOSIT
F. K. Nizametdinov, A. K. Satbergenova*, D. S. Ozhigin, B. Reznik, and R. F. Nizametdinov
Karaganda Technical University, Karaganda, 100000 Kazakhstan
Al-Farabi Kazakh National University, Almaty, 050040 Kazakhstan
*e-mail: a.satbergenova2@gmail.com
Berlin University of Applied Sciences and Technology (Berliner Hochschule fur Technik),
Berlin, 1013353 Germany
The geomechanical monitoring system of ground surface in the area of the Atasu Iron Mine lease is described. The actual undermined ground surface is examined using drone photogravimetry. The sources of ground deformation are determined from independent measurements within a created temporal reference test site aligned with GNSS coordinates. High-precision geometric levelling is accomplished using metal benchmarks set as three levelling lines along and across the strike of ore bodies with a view to revealing rock mass movements in the course of underground mining.
Atasu deposit, aerial survey, geometric levelling, ground surface displacements, reference points and benchmarks, 3D ground surface model
DOI: 10.1134/S1062739124030190
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MINING ECOLOGY AND SUBSOIL MANAGEMENT
WASTEWATER REUSE IN OPEN PIT COAL MINES
P. P. Ivanov*, S. G. Pachkin, L. A. Ivanova, E. S. Mikhailova, and A. G. Semenov
Kemerovo State University, Kemerovo, 650000 Russia
*e-mail: ipp7@yandex.ru
Re-usability of wastewater from open pit coal mines and surface flows is discussed with regard to the adopted water circulation cycles. The analysis of process flow charts of open pit coal mining and water use made it possible to identify the main trends of wastewater application and volume reduction. A flowsheet of integrated treatment and distribution of wastewater in open pit mines is developed. It is shown that efficient management of intramine water consumption and expansion of cooperation with wastewater consumers can allow high-rate recycling of industrial wastewater. The proposed activities can help reduce environmental pressure in coal mining areas, and decrease amount of wastewater which need advanced treatment down to maximum allowable concentration of harmful agents in fishery water bodies.
Wastewater, wastewater treatment, coal mines, water circulation, water use, water removal, water balance
DOI: 10.1134/S1062739124030207
REFERENCES
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