JMS, Vol. 58, No. 4, 2022
GEOMECHANICS
JUSTIFICATION OF PITWALL PARAMETERS: A CASE-STUDY OF KOKTASZHAL DEPOSIT, KAZAKHSTAN
N. F. Nizametdinov, V. D. Baryshnikov, A. A. Nagibin, R. F. Nizametdinov, and A. S. Tuyakbay
Karaganda Technical University,
Karaganda, 100000, Kazakhstan
e-mail: mdig_kstu@mail.ru
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
e-mail: v-baryshnikov@yandex.ru
The article describes a technical approach to justification of pitwall parameters based on an integrated geomechanical research of pitwall rock mass using cores from specially drilled earth bores. The sizes of structural blocks, the rock mass quality index and structural weakness coefficient are determined. The strength characteristics of rocks and their physical properties are studied on a laboratory scale. Estimates of pitwall stability using different methods show a good agreement. The optimal pitwall parameters are recommended.
Pitwall, earth bore, core, sample, strength characteristics, structural weakness coefficient, rock mass quality index, slope calculation methods, stability factor
DOI: 10.1134/S1062739122040019
REFERENCES
1. Nizametdinov, F.K., Baryshnikov, V.D., Zhanatuly, E., Nagibin, A.A., Tuyakbai, A.S., Nizametdinov, N.F., and Estaeva, A.R., Selection and Justification of Design Variables for Strength Properties of Rocks in Slope Stability Analysis for Open Pits, Journal of Mining Science, 2021, vol. 57, no. 3, pp. 386–392.
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5. Nizametdinov, F.K., Nagibin, A.A., Levashov, V.V., Nizametdinov, R.F., Nizametdinov, N.F., and Kasymzhanova, A.E., Methods of In Situ Strength Testing of Rocks and Joints, Journal of Mining Science, 2016, vol. 52, no. 2, pp. 226–232.
6. Metodicheskie ukazaniya po nablyudeniyam za deformatsiyami bortov, otkosov ustupov i otvalov na kar’erakh i razrabotke meropriyatii po obsepechaniyu ikh ustoichivosti (Guidelines on Slope Deformation Monitoring in Pitwalls and Dumps and on Their Stability Measures in Open Pit Mining), Approved by the Ministry of Emergency Situations of the Republic of Kazakhstan, order no. 39 dated 28 September 2008.
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8. Nizametdinov, F.K. (Ed.), Upravlenie ustoichivost’yu porodnykh otvalov (Stability Control in Overburden Dumps), Karaganda: KRU, 2014.
9. Popov, V.N., Shpakov, P.S., and Yunakov, Yu.L., Upravlenie ustoichivost’yu kar’ernykh otkosov (Slope Stability Control of Pitwall), Moscow: Gornaya kniga, 2008.
10. Svidetel’stvo o gosudarstvennoi registratsii prav na ob’ekt avtorskogo prava “Ustoichivost’ kar’ernykh otkosov” (State Registration Certificate of Proprietary Rights Object), no. 126, 2015; IS 000641.
11. Ozhigin, S.G., Ozhigina, S.B., and Ozhigin, D.S., Method of Computing Open Pit Slopes Stability of Complicated-Structure Deposits, Inzynieria Mineralna, 2018, vol. 19, no. 1, pp. 203–208.
12. Ozhigina, S.B., Mozer, D.V., Ozhigin, D.S., Ozhigin, S.G., Bessimbayeva, O.G., and Khmyrova, E.N., Monitoring of the Undermined Territories of Karaganda Coal Basin on the Basis of Satellite Radar Interferometry, ISPRS Annals of the Photogrammetry, Remote Sensing Spatial Inform. Sci., 2016, no. 3, pp. 37–40.
13. Ozhygin, D., Safar, V., Dorokhov, D., Ozhygina, S., Ozhygin, S., and Stankova, H., Terrestrial Photogrammetry at the Quarry and Validating the Accuracy of Slope Models for Monitoring Their Stability, IOP Conf. Series, Earth Environmental Sci., 2021, vol. 906, no. 1, 012062.
CLUSTERING IN GRANULAR MEDIUM IN BIAXIAL COMPRESSION
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: olgarevn@yandex.ru
The experimental and theoretical studies show that plane deformation of granular medium induces formation of clusters with sizes of the order of 10–15 diameters of particles. The process of biaxial compression is examined. It is found that deformation has four basic modes conformable with different shapes of clusters. The modes feature a very complex alternation behavior. The process of deformation possesses memory with the Hurst exponent of 0.84. The limit loads in different modes can differ by 2 or 3 times. In problems on deformation of granular media, the calculation of mechanical condition of domains less than 80–100 diameters of particles in size should use not the continuum models but the discrete element method.
Biaxial compression, deformation, clusters, discrete elements, critical force
DOI: 10.1134/S1062739122040020
REFERENCES
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MINE GEOMETRY-BASED PREDICTION OF TECTONIC FAULTS IN COAL SEAM IN EXTRACTION PANEL
S. V. Shaklein and T. B. Rogova
Institute of Coal and Coal Chemistry, Siberian Branch,
Russian Academy of Sciences, Kemerovo, 650065 Russia
e-mail: svs1950@mail.ru
Gorbachev Kuzbass State Technical University, Kemerovo, 650000 Russia
The article describes a new method proposed for the mine geometry-based prediction of location and vertical amplitude of faults within the boundaries of an extraction panel using the data on survey network coordinates. A survey network is split into cells—convex quadrilaterals with their vertexes representing the survey grid points. For each quadrilateral, the geometric uncertainties of the coal seam hypsometry are estimated as closure errors and are eliminated in the course of the survey grid adjustment by means of correction of heights. The method consists in calculation and analysis of corrections for the measured absolute heights of the coal seam points arranged in mine roadways, the introduction of which eliminates the interpretation uncertainty of geological data. The corrections are only assumed to be the weights of the measurement and interpolation errors in the neighborhood of specific measurement points. A fault is predicted when there is a jump between the values of the correction for the neighbor measurement points.
Disjunction, coal seam, prediction, extraction panel
DOI: 10.1134/S1062739122040032
REFERENCES
1. Cherepanov, V.G. and Shaklein, S.V., Completeness of StudiesiInto Faulting of Coal Seams within the Limits of Extraction Panels Prepared for Longwalling, Nedropol’zovanie XXI vek, 2012, no. 5, pp. 26–31.
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PHYSICAL MODELING OF TAILINGS DAMS IN CHINA: A REVIEW
Haitao Maa and Yihai Zhanga
China Academy of Safety Science and Technology, Beijing, 100012 China
e-mail: 1604659717@qq.com
To enhance the scientific nature and the reliability of physical modeling of tailings dams, the present developments and main achievements are discussed from four perspectives: dam break, downstream evolution, stability evaluation and protection tests. The experiment materials, methods of measurement and instruments used are summarized. The problems and shortcomings of physical model tests are investigated in terms of the difference between a physical model and a prototype, nature of the experiment, methods of measurement, etc. Emerging technologies such as artificial intelligence and 3D printing to improve safety of tailings dams are discussed. The scope of the review embraces environmental impact of tailings dams in case of accidents.
Tailings dam, physical model, dam-break, research status
DOI: 10.1134/S1062739122040044
REFERENCES
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13. Pan, J.P., Wang, S.Y., and Zhu, H.W., Study on Flow Slide Destruction Models Induced by Seismic Liquefaction and Stabilizing Measures of Tailings Dam, Metal Mine, 2011, vol. 46, no. 4, pp. 134–136.
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18. Zhang, X.K., Sun, E.J., and Li, Z.X., Experimental Study on Evolution Law of Tailings Dam Flood Overtopping, China Safety Sci. J., 2011, vol. 21, no. 7, pp. 118–124.
19. Chu, J.W., Song, H.B., and Zhang, H.W., Experimental Study on Tailing Dam Break due to Overtopping, China Mine Eng., 2015, vol. 44, no. 3, pp. 73–77.
20. Jin, J.X., Cui, H.Z., Liang, B., et al., Process Model Test on Tailings Dam Break in Earthquake Action and Reinforcement Scheme, China Safety Sci. J., 2017, vol. 27, no. 2, pp. 92–97.
21. Sun, E.J., Zhang, X.K., and Cheng, S., Centrifuge and Shaking Table Experiment on the Tailings Dam Failure, China Safety Sci. J., 2012, vol. 22, no. 6, pp. 130–135.
22. Wang, Y.Q. and Zhang, J.C., Tailings Dam-Break Debris Flow Prediction Analysis Based on Similar Tests, China Safety Sci. J., 2012, vol. 22, no. 2, pp. 70–75.
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MINERAL MINING TECHNOLOGY
SPECIFICS OF OPEN PIT MINING IN BRACHYSYNCLINE-TYPE COALFIELDS
V. I. Cheskidov, V. L. Gavrilov, E. A. Khoyutanov, A. V. Reznik, and N. A. Nemova
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091 Russia
e-mail: cheskid@misd.ru
Chersky Institute of Mining of the North, Siberian Branch, Russian Academy of Sciences, Yakutsk, 677980 Russia
e-mail: batuginan@mail.ru
The article describes the studies into the geological conditions and geotechnologies of coal mining in brachysyncline-type fields. It is found that such coalfields have some specifics which governs the choice of the open pit mining technologies to be efficient. The authors propose an approach to justification of a sequence of mining and to selection of geotechnologies for coalfields in brachysynclinal folds.
Coal, brachysyncline, geological conditions, open pit mining, geotechnologies
DOI: 10.1134/S1062739122040056 REFERENCES
1. Petrenko, I.E., 2021 Outcomes of the Coal Industry in Russia, Ugol’, 2022, no. 3, pp. 9–23.
2. Ugol’naya baza Rossii. Ugol’nye basseiny i mestorozhdeniya Zapadnoi Sibiri (Coal Reserves of Russia. Coal Basins and Deposits in West Siberia), Moscow: Geoinformtsentr, 2002, vol. II, book 2.
3. Ugol’naya baza Rossii. Ugol’nye basseiny i mestorozhdeniya Vostochnoi Sibiri (Coal Reserves of Russia. Coal Basins and Deposits in East Siberia), Moscow: Geoinformtsentr, 2002, vol. III.
4. Ugol’naya baza Rossii. Ugol’nye basseiny i mestorozhdeniya Dal’nego Vostoka Rossii (Coal Reserves of Russia. Coal Basins and Deposits in the Russian Far East), Moscow: Geoinformtsentr, 1999, vol. V, book 2.
5. Barskii, A.A., Kosolapov, A.I., Aver’yanov, A.G., and Matsitskiii, A.L., History and Conditions of Mining at the Main Bituminous Coal Deposits in the Minusinsk Basin, Izv. UGGU, 2022, no. 3, pp. 96–106.
6. Erdenetsogt, B., Lee, I., Bat-Erdene, D., and Jargal, L., Mongolian Coal-Bearing Basins: Geological Settings, Coal Characteristics, Distribution, and Resources, Int. J. Coal Geol., 2009, vol. 80, pp. 87–104.
7. Matveev, A.K. (Ed.), Geologiya ugol’nykh mestorozhdenii SSSR (Geology of Coal Deposits in the USSR), Moscow: MGU, 1990.
8. Tkach, S.M. (Ed.), Geotekhnologii otkrytoi dobychi na mestorozhdeniyakh so slozhnymi gorno-geologicheskimi usloviyami (Open-Pit Mining Technologies for Complex Geological Conditions), Novosibirsk: Geo, 2013.
9. Cheskidov, V.I. and Norri, V.K., Mining of U-Shaped Hard Mineral Bodies, Journal of Mining Science, 2015, vol. 51, no. 3, pp. 529–534.
10. Gavrilov, V.L. and Khoyutanov, E.A., Geotechnical Modeling of Caking Ability of Coking Coal, InterExpo-GEO-Sibir, 2021, vol. 2, no. 3, pp. 153–161.
11. Melekhov, D.P., Suprun, V.I., Pastikhin, D.V., Radchenko, S.A., Levchenko, Ya.V., and Panchenko, O.L., the Order and Principles of Mining of Large Coal-Bearing Brachysynclines, Ugol’, 2013, no. 6, pp. 22–26.
12. Burtsev, S.V., Matveev, A.V., Suprun, V.I., Radchenko, S.A., and Levchenko, Ya.V., Determination of Parameters and Zones of Use of Permanent Roads Laid on the Side of Highwalls, Ugol’, 2018, no. 3, pp. 43–49.
13. Shchadov, V.M., Otkrytaya razrabotka slozhnostrukturnykh ugol’nykh mestorozhdenii Vostochnoi Sibiri i Dal’nego Vostoka (Open Pit Mining of Structurally Complex Coalfields in East Siberia and Russian Far East), Moscow: Gornaya kniga, 2004.
14. Grigor’ev, S.N. and Morgunov, I.V., Advance of Mining Operations in Medium-Size Downfolds, Gorn. Inform-Analit. Byull., 2014, no. 2, pp. 47–52.
15. Cheskidov, V.I., Tsymbalyuk, T.A., and Reznik, A.V., Enhancing Efficiency of Direct Dumping by Cast Blasting of Overburden Rocks, Journal of Mining Science, 2020, vol. 56, no. 2, 246–251.
16. Levchenko, Ya.V., Morphological, Geomechanical and Geotechnical Impacts on Change in Mineable Coal Reserves, Gorn. Inform.-Analit. Byull., 2015, no. 7, pp. 416–422.
17. Vlasov, V.M. and Androsov, A.D., Tekhnologii otkrytoi dobychi almaza v kriolitozone (Technologies of Open-Pit Diamond Mining in the Permafrost Zone, Yakutsk, 2007.
18. Levchenko, Ya.V., Transportation Variation Patterns in Lifting Rocks in High Zones of Open Pits, Gorn. Inform.-Analit. Byull., 2015, Special Issue S5-18, pp. 3–14.
19. Gubareva, D.Yu. and Samorodova, L.L., Ways of Reducing Haulage Costs at Antonovskoe Mine Management—Division of Kuznetsk Ferroalloys JSC, Molodoi uchenyi, 2020, no. 6, pp. 22–24.
RELIABILITY ASSESSMENT OF CROSS-SECTOR MODEL DIAGNOSTICS IN THE CASE OF MINING AND ENERGY COMPLEX AFTER THE EMERGENCY SITUATION
S. Vujić, S. Maksimović, M. Radosavljević, and P. Stjepanović
Mining Institute of Belgrade, Beograd, Serbia
e-mail: slobodan.vujic@ribeograd.ac.rs
In mid-May 2014, heavy rainfall caused unprecedented floods in Serbia. Kolubara Mining Basin, the greatest coal producer in the Electric Power Industry of Serbia, has suffered enormous material damage. Coal production at four open-pit mines was suspended and the operation of four thermal power plants was threatened. The consequences of the uncontrollable water, physically visible on open-pit coal mines, were felt in all system sectors. Intersectorial analysis was used to view and diagnose the situation of the system’s production sectors. The paper gives the summaries of uncontrollable water, mining and energy system structure, the implementation of the intersectorial model in the analysis, comments on the analysis results, evaluation, and a conclusion from the aspect of efficiency and reliability of application in solving practical problems.
Intersectorial modeling, reliability, diagnosis, mining and energy complex, emergency situation
DOI: 10.1134/S1062739122040068
REFERENCES
1. Vujić, S. and Vojinović, P., Nature’s Lesson: Flooding of Open–Pit Mines of Tamnava in 2014, Bul. Mines, 2017, vol. CXIV, nos. 1–2, pp. 47–58.
2. Vujić, S., Radosavljević, М., and Polavder, S., Flooding of Two Coal Open-Pit Mines in Serbia—The Aftermath of Global Climate Change, J. Min. Sci., 2020, vol. 56, no. 1, pp. 79–83.
3. Vujić, S., Maksimović, S., Radosavljević, М., and Krunić, D.J., Intersector Modeling and Mining, J. Min. Sci., 2018, vol. 54, no. 5, pp. 773–781.
4. Stanojević, R., Cross-Sectoral Models, Belgrade: Economic Institute, 1998 [in Serbian].
MINE AEROGASDYNAMICS
AN AUTOMATIC CONTROL ALGORITHM FOR AIR FLOW RATE AT A SUBWAY STATION PLATFORM UNDER THE IMPACT OF PISTON EFFECT
D. V. Zedgenizov
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
e-mail: dimzed2001@mail.ru
The author proposes a determination procedure for calibration factors for current frequency converter of a tunnel fan motor with regard to air flow rate control time at each train density. The ranges of three quality criteria of ventilation control in subways are determined. The ventilation energy consumption at a subway station is analyzed as function of an opening angle of air flaps in the ventilation connection at the station, and the economic runs are selected for the flap air governor. The change in the air flow rate at a station versus the flap air governor setting angle serves the basis to create the automatic air control algorithm for a shallow subway with ventilation due to the piston effect in the absence of tunnel fans. The algorithm allows maintenance of the required air renewal at subway stations in rush hours.
Tunnel fan, rotor speed, air flow rate, piston effect, flap air governor, air distribution, control quality, subway
DOI: 10.1134/S106273912204007X
REFERENCES
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8. Krasyuk, A.M., Lugin, I.V., and Pavlov, S.A., Circulatory Air Rings and Their Influence on Air Distribution in Shallow Subways, Journal of Mining Science, 2010, vol. 46, no. 4, pp. 431–437.
9. Krasyuk, A.M., Kosykh, P.V., and Russky, E.Yu., Influence of Train Piston Effect on Subway Fans, Journal of Mining Science, 2014, vol. 50, no. 2, pp. 362–370.
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13. Zhang, X., Ma, J., Li, A., Lv, W., Zhang, W., Yang, C., and Deng, B., Train-Induced Unsteady Airflow Effect Analysis on a Subway Station Using Field Experiments and Numerical Modeling, Energy Build., 2018, vol. 174, pp. 228–238.
14. Zhang, X., Ma, J., Li, A., Lv, W., Zhang, W., and Li, D., Ventilation for Subway Stations with Adjustable Platform Doors Created by Train-Induced Unsteady Airflow, Build. Environ., 2019, vol. 152, pp. 87–104.
15. Zhang, X., Li, A., Gao, R., Yu, S., Ma, J., Yang, C., Li, D., Guo, Y., and Du, W., Effect of Operational Modes on the Train-Induced Airflow and Thermal Environment in A Subway Station with Full-Height Platform Bailout Doors, Build. Environ., 2021, vol. 194, 107671.
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24. Zedgenizov, D.V., Justification of the Quality Requirements for Automatic Controls of Ventilation System of Subways, Fundamental and Applied Mining Science, 2019, vol. 6, no. 2, pp. 108–112.
25. Ledovskikh, A.V., Control Algorithms for Station and Tunnel Fans on Lab-Scale Test Simulators of Subways Stations, Science. Technologies. Innovations: All-Russian Conference of Young Scientists, 2014, pp. 90–93.
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30. Tetior, L.N. and Daurov, I.M., Automated Control of Ventilation Equipment in Subways, Metro i tonnneli, 2017, no. 5–6, pp. 32–33.
ESTIMATING ENERGY CONSUMPTION OF MINE FANS IN UNDERGROUND MINES IN CASE OF UNCERTAINTY OF FAN INFLUENCE ZONES
A. V. Kashnikov and Yu. V. Kruglov
Mining Institute, Ural Branch, Russian Academy of Sciences, Perm, 614007 Russia
e-mail: alexey.kashnikov@gmail.ru
e-mail: aerolog@list.ru
The article presents an algorithm of automated determination of fan influence zones under conditions of their dynamic change. The use of fuzzy logic enables stabilization of crossing influence zones of fans and allows compensating impossibility of their strict differentiation when determining the most difficult-to-ventilate direction. The solution to the problem of the real-time air distribution control in a mine ventilation network is stable and close to optimality. The practical relevance of the proposed fan control algorithm and the correctness of the formulas are proved by the result of simulation modeling of automated ventilation control operation in mine 4RU of Belaruskali.
Automated ventilation control, second-order fuzzy sets, main fan, fuzzy control, fan governor
DOI: 10.1134/S1062739122040081
REFERENCES
1. Hardcastle, S., Kocsis, C., and Lacroix, R., Strategic Mine Ventilation Control: A Source of Potential Energy Savings, Proc. Montreal Energy Mines, Montreal, Canada, 2007, pp. 255–263.
2. Acun,a E., Alvarez, R., and Hurtado, J., Updated Ventilation on Demand Review: Implementation and Savings Achieved, Proc. 1st Int. Conf. Underground Min., Santiago, Chile, 2016, pp. 606–617.
3. Allen, C.L. and Tran, T.T., Ventilation-on-Demand Control System’s Impact on Energy Savings and Air Quality, Proc. CIM Canadian Inst. Min. Metall. Pet., Montreal, 2011, pp. 1–9.
4. Semin, M.A., Grishin, E.L., Levin. L.Yu., and Zaitsev, A.V., Automated Ventilation Control in Underground Mines. Problems, Current Experience and Improvement Trends, Zap. Gorn. Inst., 2020, vol. 246, pp. 623–632.
5. Semin, M.A., Levin, L.Y., and Maltsev, S.V., Development of Automated Mine Ventilation Control Systems for Belarusian Potash Mines, Arch. Min. Sci., 2020, vol. 65, no. 4, pp. 803–820.
6. Pospelov, D.A., Zaitsev, A.V., and Grishin, E.L., Ventilation Improvement in Severny Mine with Regards to Cross-Effect of Main Mine Fans, Aktual’nye problem povysheniya effektivnosti i bezopasnosti ekspluatatsii gornoshakhtnogo i neftepromyslovogo oborudovaniya (Effectivization of Mineral Mining and Oil Recovery Equipment Safety: Current Challenges), 2018, vol. 1, pp. 209–215.
7. Grishin, E.L., Nakaryakov, E.V., Trushkova, N.A., and Sanikovich, A.N., Experience in Implementation of Dynamic Mine Ventilation Control, Gornyi Zhurnal, 2018, no. 8, pp. 103–108.
8. Kruglov, Yu.V. and Semin, M.A., Improvement of Optimized Control Algorithm for Ventilation Networks of Complex Topology, Vestn. PNIPU. Geolog. Neftegaz. i Gorn. Delo, 2013, vol. 12, no. 9, pp. 106–115.
9. Allen, C. and Keen, B., Ventilation on demand (VOD) Project—Vale Inco Ltd. Coleman Mine, Proc. 12th US North American Mine Ventilation Symposium, Reno, USA, 2009, pp. 45–49.
10. De Vilhena Costa, L. and Margarida, J., Cost-Saving Electrical Energy Consumption in Underground Ventilation by the Use of Ventilation on Demand, Min. Technol., 2019, vol. 129, pp. 1–8.
11. Acuna, E. and Allen, C., Ventilation Control System Implementation and Energy Consumption Reduction at Totten Mine with Level 4 Tagging and Future Plans, Proc. 1st Int. Conf. Underground Min. Technol., Sudbury, Canada, 2017, pp. 89–95.
12. Bartsch, E., Laine, M., and Andersen, M., The Application and Implementation of Optimized Mine Ventilation on Demand (OMVOD) at the Xstrata Nickel Rim South Mine, Sudbury, Ontario, Proc. 13th US Mine Ventilation Symposium, MIRARCO, Sudbury, Canada, 2010, pp. 171–179.
13. Acuna, E. and Lowndes, I., A Review of Primary Mine Ventilation System Optimization, Interfaces, 2014, vol. 44, pp. 163–175.
14. Sjostrom, S., Klintenas, E., Johansson, P., and Nyqvist, J., Optimized Model-Based Control of Main Mine Ventilation Air Flows with Minimized Energy Consumption, Int. J. Min. Sci. Technol., 2020, vol. 30, pp. 533–539.
15. Kruglov, Yu.V., Levin, L.Yu., Kiryakov, A.S., Butakov, S.V., and Shagbutdinov, R.I., Usage of the System for Automated Optimal Control of Ventilation at Berezovskiy Mine of Belaruskali OJSC, Gornyi Zhurnal, 2013, no. 3, pp. 61–64.
16. Kazakov, B.P., Shalimov, A.V., and Kiryakov, A.S., Energy-Saving Mine Ventilation, Journal of Mining Science, 2013, vol. 49, no. 3, pp. 475–481.
17. Kruglov, Yu.V., Semin, M.A., and Zaitsev, A.V., Mathematical Modeling of Operation of Optimal Automated Ventilation Control in Underground Mines, Izv. TGU. Nauki o Zemle, 2011, no. 2, pp. 116–126.
18. Levin, L.Y. and Semin, M.A., Conception of Automated Mine Ventilation Control System and Its Implementation on Belarussian Potash Mines, Proc. 16th North American Mine Ventilation Symposium, 2017, pp. 1–8.
19. Kashnikov, A.V. and Levin, L.Y., Fan and Regulators Fuzzy Control in Mine Ventilation Systems, Proc. 22nd Int. Conf. Soft Computing Measurements (SCM), St. Petersburg, Russia, 2019, pp. 85–88.
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22. Kruglov, Yu.V., Levin, L.Yu., and Zaitsev, A.V., Calculation Method for the Unsteady Air Supply in Mine Ventilation Networks, Journal of Mining Science, 2011, vol. 47, no. 5, pp. 651–659.
MINERAL DRESSING
MODIFICATION OF DIAMOND SPECTRUM PATTERN USING LUMINOPHORE-CONTAINING AGENTS WITH ZINC AND CADMIUM CHALCOGENIDES
V. A. Chanturia, V. V. Morozov, G. P. Dvoichenkova, E. L. Chanturia, and Yu. A. Podkamenny
Academician Melnikov Research Institute of Comprehensive Exploitation of Mineral Resources–IPKON, Russian Academy of Sciences, Moscow, 111020 Russia
e-mail: elenachan@mail.ru
The authors study the processing behavior of luminophore-containing blends of zinc and cadmium chalcogenides with a view to using them for the modification of the kinetic and spectral characteristics toward enhanced recovery of weakly and abnormally luminescent diamonds usually lost in X-ray luminescence separation. It is shown that zinc and cadmium sulfides activated by copper and silver have the kinetic and spectral characteristics which are the most similar to natural diamonds. The procedure developed for the improvement of the processing behavior of luminophores with zinc and cadmium sulfides includes the circuits of surface activation with copper cations and subsequent treatment in the potassium butyl xanthate solution. The visiometric analysis reveals that the increased oil receptivity of luminophores and the dispersing agents ensure selective attachment of luminophores to diamonds. The bench testing proves feasibility of complete extraction of diamonds to concentrate, including weakly and abnormally luminescent crystals.
Diamonds, X-ray luminescence separation, luminophores, blend, organic collector, kinetic and spectral characteristics, modification
DOI: 10.1134/S1062739122040093
REFERENCES
1. Martynovich, Е.F., Morozhnikova, L.V., Klyuev, Yu.А., and Plotnikova, S.P., Rentgenolyuminestsentsiya prirodnykh almazov raznykh tipov: v kn. Voprosy teorii i praktiki almaznoy obrabotki (X-Ray Luminescence of Natural Diamonds of Different Types. Book: Problems of Theoretical and Practical Diamond Processing), Moscow: NIIMASH, 1977.
2. Mironov, V.P., Optical Spectroscopy of Diamonds from Concentrates and Tailings of X-Ray Luminescence Separation, Nauka i Obrazivanie, 2006, no. 1 (41), pp. 31–36.
3. Chanturia, V.A., Morozov, V.V., Dvoichenkova G. P., and Timofeev, А.S., Justification of Luminophore-Containing Composition for Modifying the Kinetic and Spectral Characteristics of Diamonds in X-Ray Luminescence Separation Flowcharts, Obogashch. Rud, 2021, no. 4, pp. 27–33.
4. 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.
5. Chanturia, V.A., Dvoichenkova, G.P., Morozov, V.V., Koval’chuk, О.Е., Podkamennyi, Yu.А., and Yakovlev, V.N., Selective Attachment of Luminophore-Bearing Emulsion at Diamonds—Mechanism Analysis and Mode Selection, J. Min. Sci., 2020, vol. 56, no. 4, pp. 96–103.
6. Morozov, V.V., Chanturia, V.A., Dvoichenkova, G.P., and Chanturia, E.L., Hydrophobic Interactions in the Diamond–Organic Liquid–Inorganic Luminophore System in Modification of Spectral and Kinetic Characteristics of Diamonds, J. Min. Sci., 2022, vol. 58, no. 2, pp. 257-266.
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12. Monastyrskiy, V.F. and Makalin, I.А., Increasing the Efficiency of X-Ray Luminescence Separation of Diamond-Containing Minerals, Nauka i Obrazivanie, 2017, no. 3, pp. 86–90.
13. Demchenko, A.P., Introduction to Fluorescence Sensing. Vol. 1: Materials and Devices, New York, Springer, 2020.
14. Warkentin, M., Bridges, F., Carter, S.A., and Anderson, M., Electroluminescence Materials ZnS: Cu, Cl and ZnS: Cu, Mn, Cl Studied by EXAFS Spectroscopy, Phys. Rev. B: Condens. Matter Mater. Phys., 2007, vol. 75. 75301.
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16. Bogush, I.N., Mironov, V.P., and Mityukhin, S.I., Optical Spectroscopy of Diamonds from Concentrates and Tailings of X-Ray Luminescence Separation, Nauka i Obrazivanie, 2006, no. 1, pp. 31–36.
17. Zakhvatkin, V.V., Floatation Properties of Heavy Metal Xanthates, Obogashch. Rud, 2012, no. 1, pp. 29–31.
18. Kondrat’ev, S.А., Collecting Agent Floatability Evaluation, Obogashch. Rud, 2010, no. 4, pp. 24–30.
19. Abramov, А.А. and Hoberg, H., Mechanism and Regularities of the Influence Exerted by Genetic Characteristics of Minerals on their Adsorption and Flotation Properties, Tsvet. Metally, 2008, no. 2, pp. 26–33.
20. Lai, H., Deng, J., Fan, G., Xu, H., Chen, W., Li, S., and Huang, L., Mechanism Study of Xanthate Adsorption on Sphalerite, Marmatite Surfaces by ToF-SIMS Analysis and Flotation, Minerals, 2019, vol. 9, no. 4, p. 205.
21. Liu, J., Wang, Y., Luo, D., Chen, L., and Deng, J., Comparative Study on the Copper Activation and Xanthate Adsorption on Sphalerite and Marmatite Surfaces, Appl. Surf. Sci., 2018, vol. 439, pp. 263–271.
22. Goryachev, B., Ya, K., and Nikolaev, A., The Effect of Copper, Zinc and Iron Sulphates on Sphalerite Flotation by Sulphydryl Collectors, Tsvet. Metally, 2017, no. 3, pp. 7–12.
MECHANISM OF INTERACTION BETWEEN MORPHOLINE DITHIOCARBAMATE AND CYANOETHYL DIETHYLDITHIOCARBAMATE REAGENTS AND LOW-DIMENSIONAL GOLD ON THE SURFACE OF SULFIDE MINERALS IN FLOTATION OF DIFFICULT GOLD-BEARING ORE
T. N. Matveeva, N. K. Gromova, L. B. Lantsova, and O. I. Gladysheva
Academician Melnikov Research Institute of Comprehensive Exploitation of Mineral Resources–IPKON, Russian Academy of Sciences, Moscow, 111020 Russia
e-mail: tmatveyeva@mail.ru
Using the methods of UV spectroscopy, potentiometry, laser and electron microscopy, the authors give a scientific ground and prove experimentally the mechanism of interaction between new complexing agents MDTC and CEDETC and low-dimensional gold on the surface of gold-bearing sulfides. The different surface coverage of sulfide minerals with CEDETC ensures selective hydrophobization and effective recovery of micro and nano gold from complex gold-bearing ore. The behavior of the chalcopyrite electrode potential confirms the active chemical adsorption of MDTC with the formation of the strong MDTC–Cu compound and the domination of CEDETC physisorption in the adsorption layer of minerals. The lab-scale testing of a gold-bearing ore sample from Olimpiada deposit shows that the use of MDTC and CEDETC in combination with butyl xanthate ensures the higher quality of the concentrate and the increased gold recovery by 6–7%.
Sulfide gold-bearing ore, chalcopyrite, arsenopyrite, flotation, xanthate, morpholine dithiocarbamate, cyanoethyl diethyldithiocarbamate
DOI: 10.1134/S106273912204010X
REFERENCES
1. Aleksandrova, Т.N., Orlova, А.V., and Taranov, V.А., Enhancement of Copper Concentration Efficiency in Complex Ore Processing by the Reagent Regime Variation, J. Min. Sci., 2020, vol. 56, no. 6, pp. 982–989.
2. Bragin, V.I., Burdakova, Е.А., Kondrat’eva, А.А., Plotnikova, А.А., and Baksheeva, I.I., Dressability of Old Gold-Bearing Tailings by Flotation, J. Min. Sci., 2018, vol. 54, no. 4, pp. 663–670.
3. Chanturiya, V.A. and Kondratiev, S.A., Contemporary Understanding and Developments in the Flotation Theory of Nonferrous Ores, Miner. Process. and Extr. Metall. Rev., 2019, vol. 40, no. 6, pp. 390–401.
4. Kondrat’ev, S.А and Gavrilova, Т.G., Physical Adsorption Mechanism in Terms of Sulphide Mineral Activation by Heavy Metal Ions, J. Min. Sci., 2018, vol. 54, no. 3, pp. 466–478.
5. Ryaboi, V.I. and Shepeta, Е.D., Effect of Surface Activity and Hydrophobizing Properties of Dialkyl Dithiophosphates on the Flotation of Copper Arsenic-Containing Ores, Obogashch. Rud, 2016, no. 4, pp. 29–34.
6. Ignatkina, V.А. and Bocharov, V.А., Nonferrous Metal Sulfide Flotation Schemes Based on the Use of a Combination of Collectors, Gornyi Zhurnal, 2010, no. 12, pp. 58–64.
7. Solozhenkin, P.М., Development of Principles for Selecting Reagents to Float Antimony and Bismuth Minerals, Dokl. AN RAN, 2016, vol. 466, no. 5, pp. 599–562.
8. Ryaboi, V.I., Production and Use of Flotation Reagents in Russia, Gornyi Zhurnal, 2011, no. 2, pp. 49–53.
9. Miki, H., Hirajima, T., Muta, Y., Suyantara, G.P.W., and Sasaki, K., Investigation of Reagents for Selective Flotation on Chalcopyrite and Molybdenite, Proc. of XXIX Int. Min. Proc. Congr., IMPC 2018, 2019.
10. Huang, K., Huang, X., Jia, Y., Wang, S., Cao, Z., and Zhong, H., A Novel Surfactant Styryl Phosphonate Mono-Iso-Octyl Ester with Improved Adsorption Capacity and Hydrophobicity for Cassiterite Flotation, J. Miner. Eng., 2019, vol. 142. 105895.
11. Tijsseling, L.T., Dehaine, Q., Rollinson, G.K., and Glass, H.J., Flotation of Mixed Oxide Sulphide Copper-Cobalt Minerals Using Xanthate, Dithiophosphate, Thiocarbamate and Blended Collectors, J. Miner. Eng., 2019, vol. 138, pp. 246–256.
12. Lin, Q., Gu, G., and Wang, H., Recovery of Molybdenum and Copper from Porphyry Ore via Isoflotability Flotation, Transactions Nonferrous Metals Society of China, 2017, 27.I-10, pp. 2260–2271.
13. Ramesh, Bala P., Venkatesh, P., and Abdul Jabbar, A., Influence of Dithiocarbamate on Metal Complex and Thin Film Depositions, Int. J. Innovative Res. in Sci., Eng. and Technol., 2014, vol. 3, no. 8, pp. 15301–15309.
14. Ly, N., Nguyen, T., Zoh, K.D., and Joo, S.W., Interaction between Diethyldithiocarbamate and Cu(II) on Gold in Non-Cyanide Wastewater, Sensors, 2017, vol. 17, no. 11, pp. 1–12.
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16. Matveeva, Т.N., Ivanova, Т.А., Getman, V.V., and Gromova, N.К., New Flotation Reagents for Extraction of Micro and Nanoparticles of Precious Metals from Rebellious Ore, Gornyi Zhurnal, 2017, no. 11, pp. 89–93.
17. Matveeva, Т.N., Gromova, N.К., and Minaev, V.А., Quantitative Assessment of the Adsorption Layer of Combined Diethyldithiocarbamate on Chalcopyrite and Arsenopyrite by Measuring the Surface Relief Parameters, Tsvet. Metally, 2018, no. 7, pp. 27–32.
18. Matveeva, Т.N., Gromova, N.К., and Lantsova, L.B., Development of a Method for Selective Flotation of Antimony and Arsenic Sulfides in Concentration of Complex Gold-Bearing Ores, Tsvet. Metally, 2019, no. 4, pp. 6–12.
19. Ivanova, Т.А., Chanturia, V.A. and Zimbovskiy, I.G., New Methods for Experimental Evaluation of the Selectivity of Collector Reagents for Gold and Platinum Flotation from Finely Disseminated Precious Metal Ores, Obogashch. Rud, 2013, no. 5, pp. 127–137.
20. Matveeva, Т.N., Gromova, N.К., and Lantsova, L.B., Experimental Proof of Applicability of Cyclic and Aliphatic Dithiocarbamate Collectors in Gold-Bearing Sulphide Recovery from Complex Ore, J. Min. Sci., 2021, vol. 57, no. 1, pp. 123–130.
RESOURCE-SAVING TECHNOLOGY FOR NEPHELINE CONCENTRATE PRODUCTION FROM HIGH-SILICA RAW MATERIAL
V. V. Marchevskaya and T. N. Mukhina
Mining Institute, Kola Science Center, Russian Academy of Sciences, Apatity, 184209 Russia
e-mail: v.marchevskaya@ksc.ru
The article describes the lab-scale tests aimed at development of an efficient technology for nepheline concentrate production from high-silica nepheline-bearing raw material to be a non-bauxite import-substituting feedstock for the aluminum industry in Russia and in the other countries with limited or totally unavailable high-quality bauxite reserves. The improved process flowchart ensures production of nepheline concentrate which satisfies requirements of subsequent processing by sintering with lime and contains not less than 26.4% of alumina and not more than 2.3% of total iron, with alumina recovery of not less than 90% at the silica modulus of 0.6 and alkali modulus of 0.5.
Alumina, nepheline-bearing rocks, slimes, magnetic separation, flotation, nepheline concentrate, magnetic flotation technology
DOI: 10.1134/S1062739122040111
REFERENCES
1. Alyuminievaya promyshlennost’ Rossii (Russian Aluminum Industry). URL: http://newsruss.ru/doc (application date 28.04.2022).
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RECYANIDATION OF GOLD HEAPS TAILING AT HASSAI REGION IN RED SEA STATE, SUDAN
M. Taha Osman Abdelraheem, M. Akasha, and T. Agacayak
Department of Mining Engineering, Omdurman Islamic University, Kartoum, Sudan
e-mail: mohamedtaha@oiu.edu.sd
Department of Mining Engineering, Konya Technical University, Konya, Turkey
The leaching and agitation tests of gold-bearing tailings from Hassai Mine in Sudan are carried out to find the appropriate particle size that will ensure the maximum recovery. The column tests revealed that it is easy to apply and recover about 65.52% of Au content from the Au-tailing heaps at Ariab mining company by heap leach process. The obtained recovery indicates that the economic commercial viability of the process to be applied for extraction of Au in the huge tailing heaps at Ariab mines.
Gold, cyanidation, agglomeration, heap leaching, column test, agitation tank, recovery, compaction rate
DOI: 10.1134/S1062739122040123
REFERENCES
1. Soltani, F., Marzban, M., Darabi, H., Aazami, M., and Chegeni, M.H., Effect of Oxidative Pretreatment and Lead Nitrate Addition on the Cyanidation of Refractory Gold Ore, Min. Metals Mater. Soc., 2020, vol. 72, no. 2, pp. 774–781.
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13. Li, J., Safarzadeh, M.S., Moats, M.S., Miller, J.D., LeVier, K.M., Dietrich, M., and Wan, R.Y., Thiocyanate Hydrometallurgy for the Recovery of Gold. Part III: Thiocyanate Stability, Hydrometallurgy, 2012, vol. 113–114, pp. 19–24.
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GEOINFORMATION SCIENCE
INFORMATION TECHNOLOGIES IN PROBLEMS OF NONLINEAR GEOMECHANICS. PART II: NEW METHODS, METADATA MODELS, GEODATA BASES AND BASE LAYERS OF ELECTRONIC CHARTS FOR A TYPICAL GEOPORTAL OF MINING REGIONS IN SIBERIA
V. P. Potapov, V. N. Oparin, L. S. Mikov, and S. E. Popov
Federal Research Center for Informational and Computational Technologies–Division in Kemerovo, Kemerovo, 650025 Russia
e-mail: ict@ict.nsc.ru
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630091 Russia
e-mail: oparin@misd.ru
The new methodological approach to modern integrated geomechanical monitoring of large-scale subsoil use facilities in Siberia uses the multimodal and digital factories of diversified experimental and theoretical geoinformation. The main elements of the geoinformation system are described with definition of communications implemented via systems of orchestration of the data containers. The information aggregation and transmission technologies use the Internet of Things and include data storage, processing and systematization stages with regard to the available information on subsoil use assets. The trials of the information system in its different modes and options are described as a case-study of Kuzbass and Norilsk mining industry. The authors propose a new energy-based approach to the integrated analysis of nonlinear deformation waves and seismic emission processes within the framework of theory of pendulum waves.
Information systems and technologies, large-scale subsoil use facilities in Siberia, metadata models, geodata bases, typical geoportal, mining region, software testing, ‘geomechanical temperature’, thermodynamic periods
DOI: 10.1134/S1062739122040135
REFERENCES
1. Oparin, V.N., Adushkin, V.V., Baryakh, A.A. et al, Geomekhanicheskie polya i protsessy: eksperimental’no-analiticheskie issledovaniya formirovaniya i razvitiya ochagovykh zon katastroficheskikh sobytii v gorno-tekhnicheskikh i prirodnykh sistemakh (Geomechanical Fields and Processes: Experimental and Analytical Research of Initiation and Growth of Disaster Sources in Geotechnical and Natural Systems), N.N. Mel’nikov (Ed.), Novosibirsk: SO RAN, 2018–2019, vols. 1 and 2.
2. Potapov, V.P., Oparin, V.N., Mikov, L.S., and Popov, S.E., Information Technologies in Problems of Nonlinear Geomechanics. Part I: Earth Remote Sensing Data and Lineament Analysis of Deformation Wave Processes, J. Min. Sci., 2022, vol. 58, no. 3, pp. 486–502.
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16. Adushkin, V.V. and Oparin, V.N., From the Alternating-Sign Explosion Response of Rocks to the Pendulum Waves In Stressed Media, Journal of Mining Science, Part I: 2012, vol. 48, no. 2, pp. 203–222; Part II: 2013, vol. 49, no. 2, pp. 175–209; Part III: 2014, vol. 50, no. 4, pp. 623–645; Part IV: 2016, vol. 52, no. 1, pp. 1–35.
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27. Potapov, V.P., Oparin, V.N., Logov, А.B., Zamaraev, R.Yu., and Popov, S.Е., Regional Geomechanical-Geodynamic Control Geoinformation System with Entropy Analysis of Seismic Events (In Terms of Kuzbass), J. Min. Sci., 2013, vol. 49, no. 3, pp. 482–488.
28. Logov, А.B., Oparin, V.N., Potapov, V.P., Schastlivtsev, Е.L., and Yukina, N.I., Entropy Analysis of Process Wastewater Composition in Mineral Mining Region, J. Min. Sci., 2015, vol. 51, no. 1, pp. 186–196.
MONITORING SYSTEMS IN MINING
MONITORING OF ROOF SUBSIDENCE BASED ON MANMADE ACOUSTIC SIGNAL PROPERTIES
V. I. Shilov and Z. V. Aksenov
National University of Science and Technology—NUST MISIS, Moscow, 119049 Russia
MNTL RIVAS, Moscow, 111625 Russia
e-mail: aksenov.zakhar@yandex.ru; info@rivas.ru
The manmade acoustic signal properties are determined for rock mass monitoring aimed to predict main roof subsidence in coal longwalls. The limit properties for the automatic problem algorithm are defined. The dynamics of the informative parameters of a manmade acoustic signal is demonstrated as a case-study of the main roof subsidence areas in longwalls in Yalevsky Mine, Kirov Mine and Komsomolets Mine. The parameter stability of the integral resonance frequency energy at different distances from a setup room lengthwise an extraction panel is studied in three longwalls in coal mines of SUEK-Kuzbass in order to find correlation between relative stresses and intensity of interlaminar strains. The proposed and proven prognostic parameter enables timing of main roof subsidence and evaluation of the process dynamics.
Manmade acoustic signal, main roof subsidence, mining safety, acoustic control of rock mass condition, relative stress dynamics
DOI: 10.1134/S1062739122040147
REFERENCES
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5. Antsiferov, М.S., Antsiferova, N.G., and Kogan, Ya.Ya., Seismoakusticheskie issledovaniya i problema prognoza dinamicheskikh yavlenii (Seismoacoustic Studies and Problem of Predicting Dynamic Phenomena), Moscow: Nauka, 1971.
6. Mirer, S.V., Khmara, О.I., and Maslenshchikov, Е.V., Control of Rockburst Hazard in Bottomhole Areas by Spectral Characteristics of Acoustic Signals, Problems of Preventing Sudden Rockbursts. Research Community of A.A. Skochinskii Mining Institute, 1987, pp. 52–61.
7. Bizyaev, А.А., Voronkina, N.М., Savchenko, А.V., and Tsupov, М.N., Procedure for Contactless Determination of Critically Loaded Zones in a Rock Mass, Ugol’, 2019, no. 11, pp. 27–31.
8. Yakovlev, D.V., Mulev, S.N., Yakovlev, V.А., et al., System of Seismic Monitoring GITS, Sb. Nauch. Tr. VNIMI, Saint Petersburg, 2012, pp. 18–25.
9. Antsiferov, А.V., Teoriya i praktika shakhtnoi seismorazvedki (Theory and Practice of Mine Seismic Exploration), Donetsk: Alan, 2003.
10. Pisetskiy, V.B., Lapin, E.S., Zudilin, А.E., Lapin, S.E., Babenko, А.G., Abaturova, I.V., Patrushev, Yu.V., Aleksandrova, A.V., and Shinkaryuk, V.А., Methods and Technologies for Predicting the Structure and Estimating the Parameters of Geodynamic Condition of Geological Environment from Seismic Data in Applications in the Oil and Gas, Mining and Construction Industries, Proc. of Scientific Workshop on Geodynamics, Geomechanics and Geophysics, Novosibirsk, 2013.
11. Otto, R., Button, E.A., Bretterebner, H., and Schwab, P., The Application of TRT—True Reflection Tomography—At the Unterwald Tunnel, Felsbau, 2002, vol. 20, no. 2, pp. 51–56.
12. Kase, E.J., Ross, T., Li, P.H., and Henthorne, R.W., Seismic Imaging to Determine Extent of Sinkholes: Rockvision3D Case Studies, 2003.
13. Lu, X., Liao, X., Wang, Y., Wang, G., Fu, Z., and Tai, H., The Tunnel Seismic Advance Prediction Method with Wide Illumination and a High Signal-to-Noise Ratio, Geophysical Prospecting, 2020, vol. 68, iss. 8, pp. 2444–2458.
14. Kopylov, К.N., Smirnov, О.V., Kulik, А.I., and Paltsev, А.I., Automated System for Monitoring Rock Mass Condition and Predicting Dynamic Phenomena, Bezop. Truda Promyshl., 2015, no. 8, pp. 32–37.
15. Lunev, S.G. and Kolchin, G.I., Assessment of Rock Mass Condition by the Results of Pulsed Excitation. Methods and Means of Ensuring Safe and Healthy Working Conditions in Coal Mines, Part I, Sb. Nauch, Tr., Makeevka: MakNII, 2001.
16. Smirnov, О.V., Kulik, А.I., Shilov, V.I., and Gorbachev, A.S., Automated Prediction of Dynamic Phenomena, Dobyvayushchaya Promyshlennost’, 2016, iss. 2, pp. 56–63.
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20. Aksenov, Z.V., Study of Interlaminar Strains Arising during the Subsidence of Main Roof of a Coal Seam, Mining Informational and Analytical Bulletin—GIAB, 2021, no. 9, pp. 23–35.
NEW METHODS AND INSTRUMENTS IN MINING
A METHOD OF OBTAINING SWCC BASED ON CONVENTIONAL GEOTECHNICAL TEST
Xiao-Wen Liu, Meng-Jia Wang, Fan Xu, Wendong Wang, and Yun-Xue Ye
School of Civil Engineering and Architecture, Nanchang University, Nanchang, Jiangxi, China
e-mail: liuxiaowen@ncu.edu.cn
School of Civil Engineering and Architecture, Nanchang Hangkong University, Nanchang, Jiangxi, China
Soil–water characteristic curves (SWCC) are extremely important in solving practical engineering problems. Most of SWCC are measured based on the specimen in equilibrium, which has long test time, high specialization of test equipment and complicated test operation steps. Moreover, based on the existing equipment technical conditions, the determination of SWCC in the process of dehumidification and moisture absorption requires a variety of tests. Taking Jiangxi laterite, granite residual soil and expansive soil as the research object, SWCC based on the conventional geotechnical test is obtained. SWCC of dehumidification under no vertical load and vertical load and the soil water characteristic curves of dehumidification and moisture absorption are studied by conventional geotechnical tests. Compared with SWCC measured by geo experts pressure plate instrument, SWCC measured based on conventional geotechnical test is very close to that measured by pressure plate instrument.
Drying shrinkage test, triaxial test, pressure plate test, theoretical analysis, SWCC
DOI: 10.1134/S1062739122040159
REFERENCES
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MINING ECOLOGY AND SUBSOIL MANAGEMENT
NEARSURFACE AIR LAYER POLLUTION WITH MICRONIC DUST PARTICLES IN LARGE-SCALE BLASTING IN OPEN PIT MINING
V. M. Khazins, S. P. Solov’ev, D. N. Loktev, A. V. Krasheninnikov, and V. V. Shuvalov
Academician Sadovsky Institute of Geosphere Dynamics, Russian Academy of Sciences,
Moscow, 119334 Russia
e-mail: v_hazins@yahoo.com
Gas and dust clouding after large-scale blasting at Sitovo Quarry in the Lipetsk Region and the resultant pollution of the neighborhoods of the nearest towns is studied. The concentrations of solid particles less than 2.5 µm in size are determined in real time using modern equipment. The electronic filming of a large-scale blast and the dust cloud transfer with the wind within the limits of the quarry allowed considering a theoretical partial problem on propagation of fine-dispersion dust from the upper portion of the cloud from a height of 50–100 m to the recording points on ground surface beyond the quarry limits. The methods of computational fluid dynamics are used to model flow at the bottom of the atmospheric boundary layer disturbed by the wind interaction with the quarry topography. It is shown that turbulent diffusion ensures vertical dispersion of micro particles down to the recording points. An explanation is proposed for the revealed non-monotonic maximal concentration of dust over ground surface with an increasing distance from the quarry.
Quarry, large-scale blasts, micro dust particles, numerical modeling
DOI: 10.1134/S1062739122040160
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ECOLOGICAL MONITORING METHOD AND TOOLS FOR DUST SUPPRESSION DURING COAL TRANSPORTATION AND STORAGE
A. A. Begunov, V. I. Udovitsky, V. A. Kandinsky, and A. I. Kostenyuk
BRENT Engineering Company, Kemerovo, 650043 Russia
Institute of Coal, Federal Research Center for Coal and Coal Chemistry,
Siberian Branch, Russian Academy of Sciences, Kemerovo, 650065 Russia
e-mail: uvi_kuzstu@mail.ru
The new dust suppression method using chemical agents has been developed, patented and put in use in some surface and underground mines in Kuzbass, in the Novosibirsk Region and in Khakassia. As compared with the known solutions, this method allows enhancing efficiency of dust suppression in combination with extra effect of decreased freezing of coal during transportation.
Mechanical processing, loss, storage, transportation, dust, dust formation, emission sources, dust suppression
DOI: 10.1134/S1062739122040172
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