JMS, Vol. 58, No. 5, 2022
GEOMECHANICS
MONITORING ROCK MASS CONDITION USING THE FUNDAMENTAL MODE RAYLEIGH WAVE
A. S. Serdyukov, M. V. Kurlenya, A. V. Yablokov, T. V. Shilova, and R. A. Efremov
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
e-mail: aleksanderserdyukov@yandex.ru
Trofimuk Institute of Oil and Gas Geology and Geophysics,
Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
The authors propose a new approach to processing multichannel data on surface waves to enhance interference immunity of dispersion curves of the Rayleigh wave phase velocities determined from the analysis of motion paths of particles in the time-and-frequency domains based on the S-transform applied to the two-component seismic records. Efficiency of the approach is demonstrated as a case-study of processing of the synthetic and field data of shallow seismic investigations.
Mining geophysics, engineering seismics, physical and mechanical properties of rocks, seismic stability, monitoring, multichannel analysis of surface waves, frequency-and-time representation, polarization analysis
DOI: 10.1134/S1062739122050015
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16. Serdyukov, A.S., Azarov, A.V., Yablokov, A.V., Shilova, T.V., and Baranov, V.D., Research Note: Reconstruction of Seismic Signals Using S-Transform Ridges, Geoph. Prospect., 2021, vol. 69, no. 4, pp. 891–900.
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NEW FORMULATIONS OF GEOMECHANICAL PROBLEMS WITH REGARD TO POST-LIMIT DEFORMATION OF ROCKS
A. I. Chanyshev and I. M. Abdulin
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
e-mail: a.i.chanyshev@gmail.ru
Novosibirsk State University of Economics and Management, Novosibirsk, 630099 Russia
Rock testing data are used to determine proper bases of tensors where strains along the unit vectors are only governed by stresses along them. The obtained curves along the unit vectors—one curve is proportional and the other curve is nonlinear, and both are independent of loading history and mechanism—are used to solve geomechanical problems. In planar post-limit deformation, these curves lead to a hyperbolic system of differential equations with four real functions and four relations to find four unknown functions: average stress, maximum shear stress, rotation angle and angle of directions of principal stress tensor axes. For finding their boundary values, the Cauchy stress vector and the displacement vector are assigned simultaneously at one and the same boundary. The authors propose an algorithm of finding these four functions within the post-limit deformation domain.
Resistance, deformation, basis of tensor, proper basis, theoretical curves, post-limit deformation, hyperbolic system of equations, functions, Cauchy problem
DOI: 10.1134/S1062739122050027
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CHARACTERISTIC ANGLES OF OVERLYING STRATA COLLAPSE CAUSED BY UNDERGROUND MINING
Wang Feifei, Ren Qingyang, Jiang Xueliang, Chen Bin, Jin Honghua, and Yang Xianyi
School of Civil Engineering, Chongqing Jiaotong University,
Chongqing, 400074 China
e-mail: 1942016362@qq.com
Changsha Institute of Mining Research Co., Ltd,
Changsha Hunan, 410012 China
School of Civil Engineering, Central South University of Forestry
and Technology, Changsha Hunan, 410004 China
Chagan Aobao Iron–Zinc Mine is taken as the research case, and the characteristic angles of overlying strata collapse caused by underground mining are recommended. The research results can provide guidance for disaster prevention and control of rock collapse.
Mining engineering, characteristic angle, overlying strata, collapse, underground mining
DOI: 10.1134/S1062739122050039
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18. Long, L.L., Chen, C.X., Xia, K.Z., et al., Research on the Surface Subsidence Laws during Underground Mining in the West of Chengchao Iron Mine, Mining Res. Development, 2016, vol. 36, no. 7, pp. 47–52.
REGRESSION ANALYSIS FOR COAL FREEZING ADHESIVE STRENGTH IN TRANSPORTATION
Da An and Chunhua Wang
School of Mechanic and Electronic Engineering, Shenyang Aerospace University, Shenyang, 110000 China
e-mail: 897785216@qq.com
School of Mechanical Engineering, Liaoning Technical University,
Fuxin, 123000 China
The authors have developed a regression model of coal freezing adhesive strength in transportation on equipment made of steel and rubber. The model uses the response surface methodology and the coal freezing adhesive strength tests. The influence exerted on the adhesive strength by the external conditions, as well as by the coal and transportation surface properties is analyzed.
Coal transportation, coal freezing adhesive strength, regression analysis, response surface methodology
DOI: 10.1134/S1062739122050040
REFERENCES
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ROCK FAILURE
SHAPES OF HYDRAULIC FRACTURES IN THE VICINITY OF BOREHOLE-AND-BRANCH HOLE JUNCTION
A. V. Azarov, A. V. Patutin, and S. V. Serdyukov
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
e-mail: antonazv@mail.ru
The authors describe numerical investigations of hydraulic fractures in boreholes with branches (intersecting boreholes). The directions of growing fractures were determined in the static problem solution by the criterion of maximum tangential stresses and in the quasi-static three-dimensional formulation with the analysis of fracture of an elastic uniform medium using the cohesive failure mode and the extended finite element method. It is found that some geometrical parameters of the starter fracture and the stress state nonuniformity have influence on the growth direction and shape of the created fractures. The X-shaped starter fracture, which simulates branching and intersections of boreholes, is preferable over the disc-shaped starter fracture in local control of hydraulic fracture orientation in rock mass under nonuniform compression.
Borehole with branch hole, intersecting boreholes, rock mass, stress state, directional hydraulic fracturing, fracture, fracture trajectory and shape, mathematical modeling, numerical investigations
DOI: 10.1134/S1062739122050052
REFERENCES
1. Yang, J., Liu, B., Bian, W., Chen, K., Wang, H., and Cao, C., Application Cumulative Tensile Explosions for Roof Cutting in Chinese Underground Coal Mines, Arch. Min. Sci., 2021, vol. 66, pp. 421–435.
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5. Pavlov, V.A., Serdyukov, S.V., Martynyuk, P.A., and Patutin, A.V., Optimization of Borehole-Jack Fracturing Technique for In Situ Stress Measurement, Int. J. Geotech. Eng., 2019, vol. 13, no. 5, pp. 451–457.
6. Serdyukov, S.V., Patutin, A.V., Serdyukov, A.S., and Shilova, T.V., RF patent no. 2522677, Byull Izobret., 2014, no. 20.
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10. Liu, Z., Wang, S., Ye, H., Yang, L., Feng, F., Lian, H., and Yang, D., Experimental Study on the Effects of Pre-Cracks, Fracturing Fluid, and Rock Mechanical Characteristics on Directional Hydraulic Fracturing with Axial Pre-Cracks, Geomech. Geophys. Geo-Energ. Geo-Resour., 2021, vol. 7, no. 2, p. 29.
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29. Patutin, A.V., Azarov, A.V., Rybalkin, L.A., Drovchik, A.N., and Serdyukov, S.V., Stable Created Fracture Growth between Two Parallel Boreholes, Journal of Mining Science, 2022, vol. 58, no. 2, pp. 202–211.
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FRACTURES AS STRESS RAISERS IN ROCK MASS IN OIL AND GAS PRODUCTION
A. M. Svalov
Institute of Oil and Gas Problems, Russian Academy of Sciences, Moscow, 119333 Russia
e-mail: svalov@ipng.ru
The spotlight is on the stress patterns in oil and gas reservoirs and in enclosing rock mass containing displaced fractures (disjunctive cleavages). The mathematical modeling finds out that with the decreasing reservoir pressure in rock mass subject to elastic deformation, the shearing stress raisers arise on the surfaces of displaced fractures and can make an initially impermeable fracture to become fluid-conductive. Creeping widens the fractures, which also contributes to hydrodynamic connection between a pay zone and the upper- and low-lying permeable strata. This process of formation of the permeable channels in rock mass can be an explanation for the mechanism of oil and gas reservoir infeed with fluid flows from the lower-lying fluid-bearing strata.
Rock discontinuities, disjunctive cleavage, productive strata, rock creep, reservoir infeed
DOI: 10.1134/S1062739122050064
REFERENCES
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MINING THERMOPHYSICS
HEAT TRANSFER PROCESSES IN RECOVERY OF PERMAFROST CONTAINING FROZEN PROCESSING WASTE BACKFILL IN UNDERGROUND MINING
G. V. Kalabin, Yu. P. Galchenko, and K. S. Khachatryan
Academician Melnikov Research Institute of Comprehensive Exploitation of Mineral Resources–IPKON,
Russian Academy of Sciences, Moscow, 111020 Russia
e-mail: kalabin.g@gmail.com
Water Problems Institute, Russian Academy of Sciences, Moscow, 119333 Russia
Description of formation of a manmade backfill made of frozen briquettes using the cryoresource of the permafrost zone involves the phase transfer theory. The seasonal dynamics of the regional temperature is included in the closed life cycle of a solid substance as the main component of the geotechnology. A Stefan problem is adapted to heat processes in formation of a manmade frozen rockmass in the permafrost by filling a mined-out void with briquettes frozen on ground surface, with further injection of processing slurries having a positive temperature in remaining cavities. The numerical implementation program is developed for the set problem in 3D formulation. The freezing time of the artificial rockmass made of the frozen briquettes is related with the size of the briquettes, and with the temperature of the permafrost and the slurries. The frozen backfill in underground mined-out voids is a favorable decision in terms of ecology in mineral mining in the permafrost zone.
Permafrost zone, closed waste life cycle, manmade frozen rockmass, Stefan problem, heat transfer, temperature fields
DOI: 10.1134/S1062739122050076
REFERENCES
1. Galchenko, Yu.P. and Kalabin, G.V., Nature-like Mining Technology as a Potentially Monumental Resolution of Environmental Contradictions during the Development of Solid Mineral Deposits, J. Eurasian Min., 2020, no. 2, pp. 26–30.
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6. Levin, L.Yu., Semin, M.A., and Zaitsev, A.V., Adjustment of Thermophysical Rock Mass Properties in Modeling Frozen Wall Formation in Mine Shafts under Construction, Journal of Mining Science, 2019, vol. 55, no. 1, pp. 157–168.
7. Levin, L.Yu., Semin, M.A., and Parshakov, O.S., Mathematical Prediction of Frozen Wall Thickness in Shaft Sinking, Journal of Mining Science, 2017, vol. 53, no. 5, pp. 938–944.
8. Khokholov, Yu.A., Gavrilov, V.L., and Fedorov, V.I., Mathematical Modeling of Heat Exchange Processes in Outdoor Storage of Frozen Coal, Journal of Mining Science, 2019, vol. 55, no. 6, pp. 1013–1022.
9. Galchenko, Yu.P., Kalabin, G.V. and Khachatryan, K.S., Adapting Theory of Phase Transitions to Cryogenic Technologies of Mining with Closed Life Cycle of Substances, Inzh. Fizika, 2021, no. 5, pp. 39–46.
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NUMERICAL MODELING OF FROZEN ROCK MASS AND ITS STRESS STATE IN SINKING
V. N. Aptukov* and V. V. Tarasov
VNII Galurgii, Perm, 614000 Russia
e-mail: Aptukov@psu.ru
e-mail: Vladislav.Tarasov@uralkali.com
Perm State National Research University, Perm, 614000 Russia
The authors implement a new model of calculating temperature field and stresses in frozen rock mass at all successive stages of sinking: rock freezing, shafting, concrete lining and thawing. The model allows assessing dynamics of temperatures and stresses in rock mass, in frozen wall and in concrete lining at the freeze and thaw stages with regard to the thermophysical and mechanical properties of the materials. It is found that functioning of the freezing pipes in the same mode in depth is nonoptimal and leads to excessive energy consumption.
Artificial ground freezing, frozen wall formation, temperature fields, stress state, mathematical modeling
DOI: 10.1134/S1062739122050088
REFERENCES
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10. Trupak, N.G., Zamorazhivanie gruntov v podzemnom stroitel’stve (Ground Freezing in Underground Construction), Moscow: Nedra, 1974.
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12. Semin, M.A., Bogomyakov, A.V., and Levin, L.Yu., Theoretical Analysis of Frozen Wall Dynamic in Transition to Passive Freezing, Zap. Gorn. Inst., 2020, vol. 243, pp. 319–328.
13. Levin, L.Yu., Semin, M.A., and Zaitsev, A.V., Adjustment of Thermophysical Rock Mass Properties in Modeling Frozen Wall Formation in Mine Shafts under Construction, Journal of Mining Science, 2019, vol. 55, no. 1, pp. 157–168.
14. Levin, L.Yu., Semin, M.A., and Parshakov, O.S., Mathematica Prediction of Frozen Wall Thickness in Shaft Sinking, Journal of Mining Science, 2017, vol. 53, no. 5, pp. 938–944.
15. Fedorova, L.L., Kulyandin, G.A., and Savvin, D.V., Geocryological Analysis of Rocks to Predict Adverse Freeze–Thaw Effects, Journal of Mining Science, 2019, vol. 55, no. 6, pp. 1023–1031.
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INVESTIGATION OF COMBUSTION KINETIC WITH COATS–REDFERN METHOD BY USING THERMOGRAVIMETRIC DATA OF DIFFERENT LIGNITE SAMPLES
T. Agacayak
Department of Mining Engineering, Konya Technical University, Konya, 42250 Turkey
e-mail: tagacayak@ktun.edu.tr
In this study, combustion properties such as thermogravimetric analysis and differential thermogravimetric analysis, combustion profile, ignition temperature and peak temperature were analyzed for 3 lignite samples obtained from different regions of Konya in Turkey. In the kinetic analysis, activation energies were calculated separately for four different reaction sequences using the Coats–Redfern method. As a result, when the calculated activation energies, thermal and kinetic properties of the coal samples are evaluated together, it is seen that Beysehir coal is more prone to combustion than other coals.
Activation energy, coal, combustion, combustion kinetics, thermogravimetric analysis (TGA), differential thermogravimetric analysis (DTGA)
DOI: 10.1134/S106273912205009X
REFERENCES
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4. Iordanidis, A., Georgakopoulos, A., Markova, K., Filippiddis, A., and Kassoli-Fournaraki, A., Application of TG-DTA to the Study of Amynteon Lignites, Northern Greece, Thermochimica Acta, 2001, vol. 371, nos. 1–2, pp. 137–141.
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STIMULATION OF SEPARATION OF DIFFICULT DIAMOND-BEARING RAW MATERIALS FROM PRIMARY, PLACER AND MANMADE DEPOSITS
V. A. Chanturia, G. P. Dvoichenkova, E. L. Chanturia, and A. S. Timofeev
Academician Melnikov Research Institute of Comprehensive Exploitation
of Mineral Resources–IPKON, Russian Academy of Sciences, Moscow, 111020 Russia
e-mail: dvoigp@mail.ru
Mirny Polytechnic Institute—Division of the Ammosov North-Eastern Federal University,
Mirny, 678174 Russia
National University of Science and Technology—MISIS, Moscow, 117049 Russia
The article describes the studies into the current flow charts available for processing diamond-bearing kimberlites of complex material constitution. The theoretical and experimental substantiation is given for the methods to modify properties of the mineral components to enhance selectivity of their separation. Efficiency of luminophore-containing compositions is proved for weakly and abnormally luminescent diamond. Luminophores modify the spectral and kinetic properties of diamond crystals to the values at which diamonds become recordable and recoverable in the current flow charts of X-ray luminescence separation. Efficiency of integration of ultrasonic, thermal and electrochemical methods in removal of hydrophilic impurities from diamond surface toward enhanced recovery of diamonds by grease technology and froth separation is demonstrated. The method is developed to increase the corrosion resistance of ferrosilicon by means of its nitride coating which unsupports interaction with corrosive components of the water environment. Experiments justify that magnetic separation improves the quality of preconcentrates of float-and-sink separation owing to removal of up to 95.8% of magnetic minerals from the diamond-bearing material.
Diamonds, minerals, X-ray luminescence separation, float-and-sink separation, grease technology, froth separation, magnetic separation, ultrasonic method, thermal method, electrochemical method, nitride ferrosilicon, preconcentrate
DOI: 10.1134/S1062739122050106
REFERENCES
1. Leontiev, R.G. and Arkhipova, Y.A., Development of the Mining Complex of the Russian Far East, IOP Conference Series: Earth and Env. Sci., 2021, vol. 723, no. 5.
2. Bogdanovich, А.V., Vasil’ev, А.М., and Urnysheva, S.А., Effect of Preparation of Diamond-Bearing Ores on their Dressing Technology, Obogashch. Rud, 2017, no. 2, pp. 10–15.
3. Klyuev, R.V., Bosikov, I.I., Mayer, А.V., and Gavrina, О.А., Comprehensive Analysis of Using Effective Technologies to Increase Sustainable Development of Natural and Technical System, Ustoichivoe razvitie gornykh territorii, 2020, no. 2 (44), pp. 283–290.
4. Ivannikov, A.L., Kongar-Syuryun, C., Rybak, J., and Tyulyaeva, Y., The Reuse of Mining and Construction Waste for Backfill as One of the Sustainable Activities, IOP Conf. Series: Earth and Env. Sci., 2019, vol. 362, no. 1.
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6. Verkhoturov, М.V., Amelin, S.А., and Konnova, N.I., Obogashchenie almazov (Enrichment of Diamonds), Krasnoyarsk: IPK SFU, 2009.
7. Goryachev, B.Е., Tekhnologiya almazosoderzhashchikh rud. Almazy, kimberlity, mineraly kimberlitov. Mineral’no-syr’evaya baza almazodobyvayushchei promyshlennosti mira (Technology of Diamond-Bearing Ores. Diamonds, Kimberlites, Kimberlite Minerals. Mineral Resource Base of the World's Diamond Mining Industry), Moscow: NITU MISiS, 2010.
8. Konnova, N.I. and Kilin, S.V., Teoriya i praktika sovremennoi separatsii v tyazhelykh sredakh. Modelirovanie rezul’tatov tyazhelosrednogo obogashcheniya (Theory and Practice of Modern Heavy Media Separation. Modeling the Results of Dense Medium Separation), Krasnoyarsk: SFU, 2013.
9. Napier-Munn, T., The Dense Medium Cyclone—Past, Present and Future, Min. Eng., 2018, vol. 116, pp. 107–113.
10. Dzhura, V.A., Development of Technology to Enrich Gravity Diamond-Bearing Concentrates in Heavy Media, Cand. Tech. Sci. Thesis, Irkutsk: IrNITU, 2004.
11. Chanturia, V.A., Dvoichenkova, G.P., Morozov V.V., Koval’chuk O.E., Podkamennyi Yu. A., and Yakovlev, V.N., Selective Attachment of Luminophore-Bearing Emulsion at Diamonds—Mechanism Analysis and Mode Selection, J. Min. Sci., 2020, vol. 56, no. 1, pp. 96–103.
12. Chanturia, V.A., Morozov V.V., Dvoichenkova, G.P., and Timofeev, А.S., Determination of the Composition of Luminophore-Containing Composition for Modifying Spectral and Kinetic Characteristics of Diamonds in Flow Charts of X-Ray Luminescence Separation, Obogashch. Rud, 2021, no. 4, pp. 27–33.
13. Chanturia, V.A., Morozov, V.V., Dvoichenkova, G.P., Koval’chuk, O.E., and Podkamennyi, Yu.A., Selecting Luminophore-Bearing Modifying Agents to Adjust Spectral Characteristics of Diamonds, J. Min. Sci., 2021, vol. 57, no. 4, pp. 625–633.
14. Morozov, V.V., Chanturia, V.A. Dvoichenkova, G.P., and Chanturia, E.L., Stimulating Modification of Spectral and Kinetic Characteristics of Diamonds by Hydrophobization of Luminophores, J. Min. Sci., 2021, vol. 57, no. 5, pp. 821–833.
15. Bogush, I.N., Spetsius, Z.V., Koval’chuk, O.E., and Pomazanskiy, B.S., Distribution of Structural Impurities and Fluid Microinclusions in Сubic and Coated Diamond Crystals from the Udachnaya Pipe, Yakutia, Russia, Geokhimiya, 2016, no. 8, pp. 708–717.
16. Spetsius, Z.V., Cliff, J., Griffin, W.L., and O’Reilly, S.Y., Carbon Isotopes of Eclogite-Hosted Diamonds from the Nyurbinskaya Kimberlite Pipe, Yakutia: The Metasomatic Origin of Diamonds, Chem. Geol., 2017, 455, pp. 131–147.
17. Kovalenko, Е.G., Dvoichenkova, G.P., and Polivanskaya, V.V., Rationale for Using Thermal Treatment to Improve the Efficiency of Froth Separation of Diamonds, GIAB, 2014, no. 6, pp. 158–164.
18. Kovalenko, Е.G., Development of a Combined Thermo-Electrochemical Method for Treatment of Flotation Systems in Froth Separation of Diamond-Bearing Kimberlites, Cand. Tech. Sci. Thesis, Moscow: IPKON RAN, 2015.
19. Podkamennyi, Yu.A., Increasing Diamond Recovery by Grease Technology Based on Combined Electrochemical and Ultrasonic Treatment, Cand. Tech. Sci. Thesis, Moscow: IPKON, 2019.
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21. Petrova, L.G., Timofeeva, G.Yu., Demin, P.Е., and Kosachev, А.V., Osnovy elektrokhimicheskoi korrozii metallov i splavov: ucheb. posobie (Fundamentals of Electrochemical Corrosion in Metals and Alloys: Study Guide), Moscow: MADI, 2016.
SELECTING COLLECTING AGENTS FOR FLOTATION
S. A. Kondrat’ev
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
e-mail: kondr@misd.ru
The characteristics of mineral floatability, namely, the wetting angle and the induction time, are examined. The agreement between the predicted floatability using these characteristics and the theoretical and experimental data is accessed. It is found that hydrophobicity defined by the wetting angle is not always a quantitative characteristic of floatation. The floatability predicted using the time of induction and mechanism of physisorption of collecting agents agrees with the tests and actual practice. The successive change in floatability of sulfhydryl and oxyhydryl collectors in transition between different reagents disagrees with the estimate of the collector force determined from the binding energy between the functional group of a collector and the cation of mineral surface. The force estimated as the effect of a physisorbed collector on the water interlayer between bubble and particle adequately describes floatability of minerals. The mechanism of physisorption of a collector is universal relative to different reagents, is applicable to the description of particle–bubble interaction and enables selecting the structure and composition of radical on an effective collecting agent.
Flotation, collecting agent, physisorption, surface activity, induction time, wetting angle
DOI: 10.1134/S1062739122050118
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A NEW APPROACH TO DETERMINING AERATION INTENSITY IN FLOTATION
T. N. Aleksandrova and V. V. Kuznetsov
Saint-Petersburg Mining University, Saint-Petersburg, 199106 Russia
e-mail: alexandrovat10@gmail.com
e-mail: valentinvadimovichkuznetsov@gmail.com
The article describes the method of potentiometry in determination of characteristic diameters of air bubbles. The authors discuss feasibility of the Sauer diameter measurement of air bubbles using the difference of electrode potentials at different depths in flotation machine and with further evaluation of aeration intensity. The studies involved a two-phase system at different consumptions of air and frother. The highest aeration intensity is found from the checking tests of a three-phase system. It is found that the rate of increase in the difference between the electrode potentials linearly correlates with the Sauter diameter of air bubbles.
Flotation, modeling, aeration, Sauter bubble diameter, aeration intensity, electrode potential
DOI: 10.1134/S106273912205012X
REFERENCES
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HYDROCHEMICAL MODIFICATION OF ZEOLITE-BEARING ROCK PROPERTIES IN PROCESSING TECHNOLOGIES
K. K. Razmakhnin, I. S. Kuroshev, A. V. Bondarev, and I. B. Razmakhnina
Chita Division of the Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Chita, 672032 Russia
e-mail: igdranchita@mail.ru
Center of Ecological and Industrial Policy, Moscow, 115054 Russian
Belgorod State University, Belgorod, 108015 Russia
The article discusses hydrochemical modification of properties of zeolite-bearing rocks in East Transbaikalia. It is found that acid-based modification enhances adsorbability of natural zeolites. The technology of processing with chemical modification is developed for zeolite-bearing rocks with regard to the earlier research findings on mineral treatment by ultrasound, accelerated electrons and high-power magnetic impulses. The rate of dealumination and the silicon module of natural zeolites from East Transbaikalia are correlated with the sulfuric acid concentration. The implemented computer-aided modeling of zeolite minerals is based on the quantum–chemical interaction of particles. The authors depict the range of use of the high-quality zeolite products in the technologies of mining waste management.
Zeolite-bearing rocks, processing, hydrochemical modification, aqueous treatment, sulfuric acid, adsorbability, use prospects
DOI: 10.1134/S1062739122050131
REFERENCES
1. Khat’kova, А.N., Mineralogo-tekhnologicheskaya otsenka tseolitsoderzhashchikh porod Vostochnogo Zabaykal’ya (Mineralogical and Technological Assessment of Zeolite-Bearing Rocks from East Transbaikalia), Chita: ChitGU, 2006.
2. Chanturia, V.А., Bunin, I.Zh., Ivanova, Т.А., and Khat’kova, А.N., Influence of High-Power Electromagnetic Pulses on Process Properties of Zeolite-Bearing Rocks, GIAB, Workshop no. 21, pp. 311–313.
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5. Razmakhnin, K.K., Development and Justification of Treatment and Modification Technology for East Transbaikalia Zeolite Rocks, J. Min. Sci., 2021, vol. 57, no. 3, pp. 493–501.
6. Yusupov, Т.S. and Shumskaya, L.G., A New Approach to the Production of Aluminum and its Compounds from Nonconventional Alumina Feedstock, J. Min. Sci., 2009, vol. 45, no. 2, pp. 182–186.
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ROASTING DECOMPOSITION FOR PHOSPHATE SEPARATION FROM ZIRCON TAILING
I. Trisnawati, G. Prameswara, E. P. Sari, A. Prasetya, P. Mulyono, and H. T. M. B. Petrus
Department of Chemical Engineering (Sustainable Mineral Processing Research Group), Universitas Gadjah Mada, Yogyakarta, 55281 Indonesia
e-mail: pmulyono@ugm.ac.id
e-mail: bayupetrus@ugm.ac.id
Polytechnic Institute of Nuclear Technology, National Research and Innovation Agency,
Yogyakarta, 55281 Indonesia
Mineral Chemical Engineering Department, Politeknik ATI Makassar, Kota Makassar, Indonesia
Unconventional Geo-Resources Research Group (UGRG), Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia
In this study, the thermal decomposition of zircon magnetic tailing has been conducted to remove phosphate using a roasting process with Na2CO3 and water leaching. The research on zircon magnetic tailing processing, which contained monazite, xenotime, zircon, anatase, rutile and cerianite, aimed to test the effectiveness of roasting techniques for phosphate decomposition so that REE can be easily extracted. The optimal conditions to ensure phosphate recovery up to 93.27% were determined. In this condition, zircon and xenotime minerals are still confirmed in the roasting products using Na2CO3.
Roasting, magnetic tailing, zircon, separation
DOI: 10.1134/S1062739122050143
REFERENCES
1. Abdelkade, A.M., Daher, A., and El-Kashef, E., Novel Decomposition Method for Zircon, J. Alloy Compd., 2008, vol. 460, nos. 1–2, pp. 577–580.
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MINING ECOLOGY AND SUBSOIL MANAGEMENT
RECOVERY DYNAMICS OF MINING-ALTERED NATURAL ECOSYSTEMS BY SATELLITE DATA
S. P. Ostapenko and S. P. Mesyats
Mining Institute, Kola Science Center, Russian Academy of Sciences, Apatity, 184209 Russia
e-mail: s.ostapenko@ksc.ru
The authors have developed a procedure for estimating recovery dynamics of natural ecosystems damaged by mineral mining using the satellite observation data. The procedure uses the vegetation index of phytocenosis and the temperature of underlying terrain. The case-study of apatite-bearing ore processing waste revealed the time series of the vegetation index and the underlying terrain temperature of the incipient phytocenosis as compared with the phytocenosis of the surrounding natural landscape. It is found that the recovery of the natural ecosystems by generation of a biologically active medium activate the test factors to reach the values of phytocenosis of the surrounding natural landscape. The justification is provided for usability of the retrospective earth remote sensing data on ground surface in the objective estimation of recovery dynamics of natural ecosystems damaged by mineral mining in the Arctic conditions without undertaking land exploration.
Apatite-bearing ore, processing waste stockpiles, damaged natural ecosystems, surrounding natural landscape phytocenosis, recovery dynamics, satellite observation data, vegetation index, underlying terrain temperature, pan sharpening
DOI: 10.1134/S1062739122050155
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ASSESSMENT OF THE GAUSSIAN MODEL VALIDITY FOR PREDICTING ZONES OF DUST IMPACT—A CASE STUDY OF CUKARU PEKI, SERBIA
V. Presburger Ulniković, A. Kostov, N. Staletović, P. Marković, and N. Tucović
University “Union-Nikola Tesla”, Belgrade, 11000 Serbia
e-mail: vladankap@gmail.com
e-mail: nomstale@mts.rs
Mining and Metallurgy Institute Bor, Bor, 19210 Serbia
e-mail: ana.kostov@irmbor.co.rs
Rakita Exploration d.o.o, Bor, 19210 Serbia
e-mail: petarmarkovic79@gmail.com
Jugoinspekt a.d., Belgrade, 11000 Serbia
e-mail: ntucovic@gmail.com
The article presents a case study of dust emissions from the preparatory works for the opening of the mine Čukaru Peki near Bor, Republic of Serbia, including an analysis of the total deposited materials, which illustrates the practical application of the proposed methodology. The monitoring was conducted one year before the start and from January to September 2018 during the preparatory mining works. The analysis of existing data predicts the creation of deposited substances from the atmosphere. This paper evaluates the validity of the Gaussian model for predicting the potential impact of dust deposits generated during preparatory mining works.
Dust deposition, particulate matter, Gaussian model, monitoring, prediction
DOI: 10.1134/S1062739122050167
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NEW METHODS AND INSTRUMENTS IN MINING
SOFT ROCK REINFORCEMENT BY BICOMPONENT ORGANOMINERAL RESIN INJECTION
T. V. Shilova, S. V. Serdyukov, and L. A. Rybalkin
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
e-mail: ss3032@yandex.ru
The authors propose and analyze the method of soft rock reinforcement by injection of bicomponent organomineral resin with compressed-air blowing of reagents deeper in rocks. The bench tester structure, the polymeric formula, the composition and resin properties, as well as the treatment procedure are presented. The tests are described. The scope of the discussion encompasses the results of the permeation tests, strength tests and the analysis of structure of voids in sand samples after their stabilization using the proposed approach and the standard single-component resin injection. The advantages of the successive injection include the chemical treatment coverage, specific consumption of agents and the increased strength.
Soft rocks, chemical reinforcement, organomineral resin, bicomponent injection, lab-scale testing, void space structure, permeability and strength properties
DOI: 10.1134/S1062739122050179
REFERENCES
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LASER SCANNING MONITORING OF DEFORMATIONS IN CONCRETE LINING OF MINE SHAFTS
V. V. Tarasov and V. N. Aptukov
VNII Galurgii, Perm, 614000 Russia
e-mail: Vladislav.Tarasov@uralkali.com
Perm State National Research University, Perm, 614000 Russia
e-mail: Aptukov@psu.ru
The authors discuss the known methods of shaft lining monitoring and put forward a new technique of real-time measurement of displacements on inner surface of concrete lining by laser scanning. The results of the preliminary filtering and subsequent processing of the specific monitoring measurements implemented in two mine shafts of Uralkali are presented as the estimates of the change in the shaft diameter, circumferencial strains and ellipticity. The monitoring data are effectively applicable in verification of mathematical models of strains and strength of concrete lining in shafts, including their junctions with horizontal tunnels.
Laser scanning, geomonitoring, mine shaft, concrete lining, strain estimation, lining condition appraisal
DOI: 10.1134/S1062739122050180
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