Deformation and failure of a high-steep slope induced by multi-layer coal mining
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e-mail: [email protected]
http://jms.imde.ac.cn https://doi.org/10.1007/s11629-019-5941-6
Deformation and failure of a high-steep slope induced by multi-layer coal mining
YU Jian-le1
https://orcid.org/0000-0001-5042-1573; e-mail: [email protected]
ZHAO Jian-jun1*
https://orcid.org/0000-0002-2208-0289;
YAN Hao-yuan2 LAI Qi-yi1
e-mail: [email protected]
https://orcid.org/0000-0002-2081-0575; e-mail: [email protected]
https://orcid.org/0000-0001-5050-2437; e-mail: [email protected]
HUANG Run-qiu1 LIU Xiu-wei3
https://orcid.org/0000-0003-0402-3237; e-mail: [email protected]
https://orcid.org/0000-0001-8940-9918; e-mail: [email protected]
LI Yang-chun3
https://orcid.org/0000-0003-4815-1943; e-mail: [email protected]
*Corresponding author 1 State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, People's Republic of China 2 Guizhou Transportation Planning Survey & Design Academe Co.,ltd. Guiyang 550081, China 3 Guizhou Geological Environment Monitoring Institute, Guiyang 550001, China Citation: Yu JL, Zhao JJ, Yan HY, et al. (2020) Deformation and failure of a high-steep slope induced by multi-layer coal mining. Journal of Mountain Science 17. https://doi.org/10.1007/s11629-020-5941-6
© Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract: During underground mining, accurate revelation on the deformation and failure mechanisms of a high-steep slope under multi-layer mining conditions facilitates the prevention and control of geological disasters in mines. Numerical simulation based on discrete element theory can be used to explore the characteristics and mechanism of action of deformation and failure of a slope under complex geological and multi-layer mining conditions. By utilising PFC2D (particle flow code) software, the deformation and failure characteristics of a high-steep slope in Faer Coal Mine in Guizhou Province, China were investigated. Additionally, the mechanism of influence of different numbers of mining layers on the deformation and failure of the high and steep slope was elucidated. The result showed that after the goaf passed by the slope toe, multi-layer mining Received: 12-Dec-2019 Revised: 16-Jul-2020 Accepted: 12-Oct-2020
aggravated the subsidence and deformation of the slope toe: the slope toppled forward as it sank. The toppling of the slope changed the slope structures: the strata in the front of the slope were transformed from anti-dip to down-dip features. Extruded by collapsed– toppled rock mass, the slope toe and the rock mass located in the lower part of the slope toe generally exhibited a locking effect on the slope. Multi-layer mining degraded the overall stability of the slope, in that the total displacement of the slope was much greater than the total mining thickness of the coal seams. Based on the aforementioned research, ideas for preventing and controlling geological disasters during mining operations under a high-stee
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