Oleksandr Krukovskyi, Viktoriia Krukovska, Wen Zhang. Outburst cavity formation in the working face driven along the outburst-prone coal seam

Details
Parent Category: Geo-Technical Mechanics, 2020
Category: Geo-Technical Mechanics, 2020, Issue 154

Geoteh. meh. 2020, 154, 121-127

https://doi.org/10.1051/e3sconf/202016800052

 

OUTBURST CAVITY FORMATION IN THE WORKING FACE DRIVENALONG THE OUTBURST-PRONE COAL SEAM

1Oleksandr Krukovskyi, 1Viktoriia Krukovska, 2Wen Zhang

1Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine, 2College of Construction Engineering, Jilin University

Language: English

Abstract. In Donbas coal mines, coal and gas outbursts present a major risk for the mining operation safety. Rapidly released energy can cause serious damage to the mine’s personnel and production equipment. Modern numerical methods allow modeling complex physical processes occurred during the coal and gas outbursts. The mathematical model was developed for the coupled processes of the rock massif deformation and gas filtration in the mine face near the tectonic dislocation. When solving the problem, the finite element method was used. The calculation results of the stresses, inelastic deformation zones, pressures of methane and configuration of cavity of the coal and gas outburst are represented in the paper. It is shown that an outburst cavity is formed inside the coal seam and is bounded from above and from below by the host rocks. The calculated geometry of the fracture cavity at the gas-dynamic phenomena in the mine working face coincides with actual data obtained in the mines of Donbas and, therefore, confirms the adequacy of the developed mathematical model.

REFERENCES

1. O. Krukovskyi, Y. Bulich, Y. Zemlianaia. Modification of the roof bolt support technology in the conditions of increasing coal mining intensity. E3S Web of Conferences, International Conference Essays of Mining Science and Practice, 109 (2019). https://doi.org/10.1051/e3sconf/201910900042

2. S. Ilin, L. Adorska, V. Samusia, D. Kolosov, I. Ilina. Conceptual bases of intensification of mining operations in mines of Ukraine based on monitoring and condition management of mine hoisting systems. E3S Web of Conferences, International Conference Essays of Mining Science and Practice, 109 (2019). https://doi.org/ 10.1051/e3sconf/201910900030

3. A. Prusova, O. Minieiev, S. Ryzhova. Simulation of the desorption process of methane adsorbed in a coal rock, taking into account intermolecular sorption interactions in the system “methane-coal”. E3S Web of Conferences, International Conference Essays of Mining Science and Practice, 109 (2019). https://doi.org/10.1051/e3sconf/201910900073

4. L. Paterson. A model for outbursts in coal. International Journal of Rock Mechanics Mining Science & Geomechanics, 23, 4 (1986). https://doi.org/10.1016/0148-9062(86)90644-3

5. S. Xue, L. Yuan, J. Wang, et al. A coupled DEM and LBM model for simulation of outbursts of coal and gas. International Journal of Coal Science and Technology, 2, 1 (2015). https://doi.org/10.1007/s40789-015-0063-4

6. A. Zhou, K. Wang, L. Wang, et al. Numerical simulation for propagation characteristics of shock wave and gas flow induced by outburst intensity. International Journal of Mining Science and Technology, 25 (2015). https://doi.org/10.1016/j.ijmst.2014.12.009

7. H. Li, Z. Feng, D. Zhao, D. Duan. Simulation Experiment and Acoustic Emission Study on Coal and Gas Outburst. Rock Mech Rock Eng, 50 (2017). https://doi.org/10.1007/s00603-017-1221-3

8. Q. Tua, Y. Chenga, Q. Liua, et al. Investigation of the formation mechanism of coal spallation through the cross-coupling relations of multiple physical processes. International Journal of Rock Mechanics and Mining Sciences, 105 (2018). https://doi.org/10.1016/j.ijrmms.2018.03.022

9. H. Qin, J. Wei, S. Li. Analysis of the coal seam spalling-failure mechanism based on the seepage instability theory. PLoS ONE, 14(7) (2019). https://doi.org/10.1371/journal.pone.0219735

10. Krukovskyi, O.P. (2011) Modelling changes of stress-strain state of solid edge during the distance of working face of mine workings. Problemy obchysliuvalnoi mekhaniky i mitsnosti konstruktsii, 17, 175-181

11. Basniev, K.S., Kochina, I.N., Maksimov, V.M. (1993). Podzemnaya gidromehanika. Moskva: Nedra

12. O. Krukovskyi, V. Krukovska. Numerical simulation of the stress state of the layered gas-bearing rocks in the bottom of mine working. E3S Web of Conferences, International Conference Essays of Mining Science and Practice, 109 (2019). https://doi.org/10.1051/e3sconf/201910900043

13. S. Skipochka. Conceptual basis of mining intensification by the geomechanical factor. E3S Web of Conferences, International Conference Essays of Mining Science and Practice, 109 (2019). https://doi.org/10.1051/e3sconf/201910900089

14. Krukovska, V.V. (2015). Simulation of coupled processes that occur in coal-rock massif during mining operations. Geotehnicheskaya mehanika [Geo-Technical Mechanics], 121, 48-99

15. Katalog vnezapnyih vyibrosov uglya i gaza na shahtah (Leningrad: Research Institute of Mining Geomechanics and Mine Surveying, Ukrainian Branch, 1989)

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