Numerical simulation analysis of covering rock strata as mining steep-inclined coal seam under fault movement
来源期刊：中国有色金属学报(英文版)2011年第z3期
论文作者：MA Feng-hai SUN Li LI Dun
文章页码：556 - 561
Key words：fault; steep-inclined coal seam; numerical simulation; overburden distortion
Abstract: The fault is one important factor for the stability of overburden strata caused by steeply inclined coal seam. The stress and displacement change of overburden strata caused by steeply-inclined coal seam mining activity under faulting was simulated by FLAC2D finite differential program on the basis of Zhaogezhuang mining example belonging to Kailuan Mining Group. From the results, the stress and displacement clouding image after mining became complex because of the fault, that is, a kind of weak structural plane. The stress concentration region concentrated around the goaf, and also around the fault plane. As the mining depth increases, the stress and displacement within the fault zone change significantly. This movement and deformation characteristic of overburden strata can provide theoretical basis for the similar mining condition.
MA Feng-hai, SUN Li, LI Dun
(College of Civil and Architectural Engineering, Dalian University, Dalian 116622, China)
Abstract:The fault is one important factor for the stability of overburden strata caused by steeply inclined coal seam. The stress and displacement change of overburden strata caused by steeply-inclined coal seam mining activity under faulting was simulated by FLAC2D finite differential program on the basis of Zhaogezhuang mining example belonging to Kailuan Mining Group. From the results, the stress and displacement clouding image after mining became complex because of the fault, that is, a kind of weak structural plane. The stress concentration region concentrated around the goaf, and also around the fault plane. As the mining depth increases, the stress and displacement within the fault zone change significantly. This movement and deformation characteristic of overburden strata can provide theoretical basis for the similar mining condition.
Key words:fault; steep-inclined coal seam; numerical simulation; overburden distortion
