Mining of Mineral Deposits

ISSN 2415-3443 (Online)

ISSN 2415-3435 (Print)

Flag Counter

Research into the coal quality with a new selective mining technology of the waste rock accumulation in the mined-out area

Dmytro Malashkevych1, Mykhailo Petlovanyi1, Kateryna Sai1, Serhii Zubko1

1Dnipro University of Technology, Dnipro, Ukraine

Min. miner. depos. 2022, 16(4):103-114

Full text (PDF)


      Purpose. The research purpose is to study the formation of quantitative-qualitative indicators of mined coal under conditions of dynamic changes in space and time with a new stope mining technology with waste rock accumulation in the underground mined-out area.

      Methods. The contours are formed for mining low-thickness coal reserves and extracting thicknesses, undercut rock volumes in the stoping and preparatory faces in the conditions of the Heroiiv Kosmosu mine. The average density values of coal, rock layers and wall rocks in the seam within the boundaries of mining contours are determined based on the geological data of wells and mining operations. The graphic basis is executed in the AutoCAD program. A digital spatial model of the С10t seam contours is used, according to the schedule for organizing stope and preparatory operations. The volumes of waste rocks and minerals involved in the formation of quantitative-qualitative rock mass indicators in a given time period are calculated.

      Findings. It has been determined that during mining of coal reserves from the studied mining area (equal to extraction site), the volume of production and the operational coal ash content in the mining technology with waste rock accumulation averages 376.5 thousand tons and 15.2%, while with traditional technology – 621.3 thousand tons and 46.7%. Nevertheless, it has been proven that in terms of energy equivalent, the value of mined coal using the mining technology with waste rock accumulation is higher by 7.4% than the traditional technology (9.6 TJ versus 8.9 TJ).

      Originality. For the first time, a mechanism for the formation of operational ash content and energy value of coal has been revealed when combining the processes of drifting operations to prepare reserves from new extraction pillars with associated stope operations into a new selective mining technology with waste rock accumulation in the mined-out area.

      Practical implications. An algorithm for predicting the operational ash content and quality of coal when using selective mining technology with waste rock accumulation in the mined-out area has been developed, which is important for the technical and economic indicators of coal mines.

      Keywords: waste rocks, accumulation, operational ash content, stoping face, drifting face, selective mining


  1. Shah, Y.T. (2021). Hybrid energy systems – strategy for decarbonization. Hybrid Energy Systems, 1-18.
  2. Debiagi, P., Rocha, R.C., Scholtissek, A., Janicka, J., & Hasse, C. (2022). Iron as a sustainable chemical carrier of renewable energy: Analysis of opportunities and challenges for retrofitting coal-fired power plants. Renewable and Sustainable Energy Reviews, (165), 112579.
  3. Wang, Q., Song, X., & Liu, Y. (2020). China’s coal consumption in a globalizing world: Insights from multi-regional input-output and structural decomposition analysis. Science of the Total Environment, (711), 134790.
  4. Spencer, D. (2019). BP statistical review of world energy statistical review of world. World Energy, (68), 1-69.
  5. Khorolskyi, A., Hrinov, V., Mamaikin, O., & Fomychova, L. (2020). Research into optimization model for balancing the technological flows at mining enterprises. E3S Web of Conferences, (201), 01030.
  6. Zhou, B., Yan, Y., Dai, H., Kang, J., Xie, X., & Pei, Z. (2022). Mining subsidence prediction model and parameters inversion in mountainous areas. Sustainability, 14(15), 9445.
  7. Koshka, O., Yavors’kyy, A., & Malashkevych, D. (2014). Evaluation of surface subsidence during mining thin and very thin coal seams. Progressive Technologies of Coal, Coalbed Methane, and Ores Mining, 229-233. https://doi:10.1201/b17547-41
  8. Bini, C., Maleci, L., & Wahsha, M. (2017). Mine waste: Assessment of environmental contamination and restoration. Assessment, Restoration and Reclamation of Mining Influenced Soils, 89-134.
  9. Aznar-Sánchez, J., García-Gómez, J., Velasco-Muñoz, J., & Carretero-Gómez, A. (2018). Mining waste and its sustainable management: Advances in worldwide research. Minerals, 8(7), 284.
  10. Zhu, W., Xu, J., Xu, J., Chen, D., & Shi, J. (2017). Pier-column backfill mining technology for con-trolling surface subsidence. International Journal of Rock Mechanics and Mining Sciences, (96), 58-65.
  11. Behera, S.K., Mishra, D.P., Singh, P., Mishra, K., Mandal, S.K., Ghosh, C.N., Kumar, R., & Mandal, P.K. (2021). Utilization of mill tailings, fly ash and slag as mine paste backfill material: Review and future perspective. Construction and Building Materials, (309), 125120.
  12. Ghirian, A., & Fall, M. (2017). Properties of cemented paste backfill. Paste Tailings Management, 59-109.
  13. Petlovanyi, M.V., Zubko, S.A., Popovych, V.V., & Sai, K.S. (2020) Physicochemical mechanism of structure formation and strengthening in the backfill massif when filling underground cavities. Voprosy Khimii i Khimicheskoi Tekhnologii, (6), 142-150.
  14. Petlovanyi, M., & Mamaikin, O. (2019). Assessment of an expediency of binder material mechanical activation in cemented rockfill. ARPN Journal of Engineering and Applied Sciences, 14(20), 3492-3503.
  15. Zhang, J., Yang, K., He, X., Wei, Z., Zhao, X., & Fang, J. (2022). Experimental study on strength development and engineering performance of coal-based solid waste paste filling material. Metals, 12(7), 1155.
  16. Zhou, N., Zhang, J., Ouyang, S., Deng, X., Dong, C., & Du, E. (2020). Feasibility study and performance optimization of sand-based cemented paste backfill materials. Journal of Cleaner Production, (259), 120798.
  17. Wang, J., Zhang, J., Li, M., Sartaj, M., & Wang, Y. (2022). A numerical simulation of the interaction of aggregate and rockfill in a gangue fluidized filling method. Sustainability, 14(19), 12838.
  18. Malashkevych, D., Sotskov, V., Medyanyk, V., & Prykhodchenko, D. (2018). Integrated evaluation of the worked-out area partial backfill effect of stress-strain state of coal-bearing rock mass. Solid State Phenomena, (277), 213-220.
  19. Nehrii, S., Nehrii, T., Zolotarova, O., & Volkov, S. (2021). Investigation of the geomechanical state of soft adjoining rocks under protective constructions. Rudarsko-Geološko-Naftni Zbornik, 36(4), 61-71.
  20. Bondarenko, V.I., Kovalevska, I.A., Biletskyi, V.S., & Desna, N.A. (2022). Optimization principles implementation in the innovative technologies for re-used extraction workings maintenance. Petroleum and Coal, 64(2), 424-435.
  21. Wang, G., Ren, H., Zhao, G., Zhang, D., Wen, Z., Meng, L., & Gong, S. (2022). Research and practice of intelligent coal mine technology systems in China. International Journal of Coal Science & Technology, 9(1), 24.
  22. Yilmaz, E., & Erkayaoglu, M. (2021). A discrete event simulation and data-based framework for equipment performance evaluation in underground coal mining. Mining, Metallurgy & Exploration, 38(5), 1877-1891.
  23. Jiang, L., Chen, S., Chen, Y., Chen, Z., Sun, F., Dong, X., & Wu, K. (2023). Underground coal gasification modelling in deep coal seams and its implications to carbon storage in a climate-conscious world. Fuel, (332), 126016.
  24. Dychkovskyi, R., Shavarskyi, J., Cabana, E.C., & Smoliński, A. (2019). Characteristic of possible obtained products during the well underground coal gasification. Solid State Phenomena, (291), 52-62.
  25. Petlovanyi, M., Lozynskyi, V., Saik, P., & Sai, K. (2019). Predicting the producing well stability in the place of its curving at the underground coal seams gasification. E3S Web of Conferences, (123), 01019.
  26. Yuan, Y., Chen, Z., Yuan, C., Zhu, C., Wei, H., & Zhang, X. (2019). Numerical simulation analysis of the permeability enhancement and pressure relief of auger mining. Natural Resources Research, 29(2), 931-948.
  27. Petlovanyi, M, Medianyk, V., Sai, K., Malashkevych, D., & Popovych, V. (2021). Geomechanical substantiation of the parameters for coal auger mining in the protecting pillars of mine workings during thin seams development. ARPN Journal of Engineering and Applied Sciences, 16(15), 1572-1582.
  28. Malashkevych, D., Poimanov, S., Shypunov, S., & Yerisov, M. (2020). Comprehensive assessment of the mined coal quality and mining conditions in the Western Donbas mines. E3S Web of Conferences, (201), 01013.
  29. Buzilo, V.I., Sulaev, V.I., Koshka, A.G., & Yavorskiy, A.V. (2013). Tekhnologiya otrabotki tonkikh plastov s zakladkoy vyrabotannogo prostranstva. Dnepropetrovsk, Ukraina: NGU, 124 s.
  30. Petlovanyi, М.V., Мalashkevych, D.S., & Sai, K.S. (2020). The new approach to creating progressive and low-waste mining technology for thin coal seams. Journal of Geology, Geography and Geoecology, 29(4), 765-775.
  31. Kovalenko, V.V., & Garkusha, V.S. (2015). Issledovanie vliyaniya PVA-emul’sii na reologicheskie svoystva tamponazhnykh rastvorov na osnove pustykh porod. Forum Hіrnykіv, (2), 110-114.
  32. Byzylo, V., Koshka, O., Poymanov, S., & Malashkevych, D. (2015). Resource-saving technology of selective mining with gob backfilling. New Developments in Mining Engineering 2015: Theoretical and Practical Solutions of Mineral Resources Mining, 485-491.
  33. Hindistan, M.A., Tercan, A.E., & Ünver, B. (2010). Geostatistical coal quality control in longwall mining. International Journal of Coal Geology, 81(3), 139-150.
  34. Petlovanyi, M., Ruskykh, V., Zubko, S., & Medianyk, V. (2020). Dependence of the mined ores quality on the geological structure and properties of the hanging wall rocks. E3S Web of Conferences, (201), 01027.
  35. Qi, H., Gai, K., Ma, D., Liang, X., & Sun, N. (2020). Study on coal quality development and application in Hetaoyu coal mine. IOP Conference Series: Earth and Environmental Science, 514(2), 022027.
  36. Busylo, V., Savelieva, T., Serdyuk, V., Koshka, A., & Morozova, T. (2015). Substantiating parameters of process design of contiguous seam mining in the Western Donbas mines. New Developments in Mining Engineering 2015: Theoretical and Practical Solutions of Mineral Resources Mining, 17-25.
  37. Sdvizhkova, Ye.A., Babets, D.V., & Smirnov, A.V. (2014). Support loading of assembly chamber in terms of Western Donbas plough longwall. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (5), 26-32.
  38. Smoliński, A., Malashkevych, D., Petlovanyi, M., Rysbekov, K., Lozynskyi, V., & Sai, K. (2022). Research into impact of leaving waste rocks in the mined-out space on the geomechanical state of the rock mass surrounding the longwall face. Energies, 15(24), 9522.
  39. Sotskov, V.O., Podvyhina, O.O., Dereviahina, N.I., & Malashkevych, D.S. (2018). Substantiating the criteria for applying selective excavation of coal deposits in the Western Donbass. Journal of Geology, Geography and Geoecology, 26(1), 158-164.
  40. SOU 10.1.00185755.001-2004. (2004). Vuhillia bure, kamiane ta antratsyt. Metodyka rozrakhunku pokaznykiv yakosti. Kyiv, Ukraina: Minpalyvenerho Ukrainy.
  41. Лицензия Creative Commons