Movement of Overburden Stratum and Damage Evolution of Floor Stratum during Coal Mining above Aquifers

doi:10.1016/j.proeng.2015.01.324

IMECH-IR > 流固耦合系统力学重点实验室

	Movement of Overburden Stratum and Damage Evolution of Floor Stratum during Coal Mining above Aquifers
	Yuan RF(袁瑞甫); Li YQ; Jiao ZH
发表期刊	Procedia Engineering
	2015
卷号	102 页码:1857-1866
ISSN	1877-7058
摘要	Based on coal mining above aquifers of Carboniferous limestone in a coal mine in North China Mining Area, the numerical method of CDEM (Continuum-based Discrete Element Method) was employed to simulate the movement of overburden stratum and damage evolution of floor stratum during coal mining above aquifers. The results indicated that the lithology, thickness, and structure of the impermeable strata and the pressure of confined water were the most pivotal elements which lead to the risk of water inrushes and damage evolution of floor stratum. In addition, the activities of overburden stratum, such as deformation, stratum separation, caving, also exhibited important effects. Compared to caving activities of the immediate roof and main roof, the critical upper strata with the larger thickness and strength showed more important influence on the damage evolution of floor stratum and water inrush risk, although it was relatively far from the coal seam. Before the initial caving of critical roof, the destruction extent of floor stratum and the risk of water inrush increased with the increase of the mined-out area and reached their peaks when the maximum caving interval was reached. When critical strata started periodic caving, the extent of destruction of floor and the risk of water inrush reached their peaks when hanging arch of critical strata reached the maximum value in this period. For caving interval in critical strata is larger than the mail roof and the stress pressure was mainly applied in the rear of the mined-out area other than the mining face, it is difficult to observe the rules of the activities of critical strata above coal seam through conventional mining monitoring ways. The activities of critical strata above coal seam should be studied to effectively prevent water inrush disaster in coal mine.
关键词	Confined Water Mining Above Aquifer Numerical Simulation Overburden Stratum Movement Water Inrush Risk
DOI	10.1016/j.proeng.2015.01.324
收录类别	EI
语种	英语
课题组名称	其他
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/59407
专题	流固耦合系统力学重点实验室
推荐引用方式 GB/T 7714	Yuan RF,Li YQ,Jiao ZH. Movement of Overburden Stratum and Damage Evolution of Floor Stratum during Coal Mining above Aquifers[J]. Procedia Engineering,2015,102:1857-1866.
APA	Yuan RF,Li YQ,&Jiao ZH.(2015).Movement of Overburden Stratum and Damage Evolution of Floor Stratum during Coal Mining above Aquifers.Procedia Engineering,102,1857-1866.
MLA	Yuan RF,et al."Movement of Overburden Stratum and Damage Evolution of Floor Stratum during Coal Mining above Aquifers".Procedia Engineering 102(2015):1857-1866.

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