极近距离煤层采空区下巷道布置数值模拟  

Numerical Simulation of Roadway Layout Under Goaf in Very Close Seam

作　　者：王强[1] Wang Qiang(Technology Center of Datong Coal Mine Group Co.,Ltd.,Datong Shanxi 037000,China)

机构地区：[1]大同煤矿集团有限责任公司技术中心

出　　处：《同煤科技》2019年第5期5-7,共3页Datong Coal Science & Technology

摘　　要：本文针对某矿近距离采空区下5#煤层回采巷道的合理布置,运用FLAC^3D模拟上层煤回采后采空区与煤柱应力分布,回采巷道不同布置方式产生的塑性区。结果表明:(1)3#煤回采后采空区形成泄压区,煤柱内部及下方应力集中,5#煤层巷道顶板所受垂直应力与巷道至煤柱距离成反比。(2)巷道外错破坏严重,內错煤柱留设大,重叠布置时顶部出现范围塑性区,采取支护优化可控,从其经济角度考虑巷道采取重叠布置。In this paper, according to the reasonable arrangement of the 5# coal seam roadway under the goaf of a certain coal mine,FLAC3D is used to simulate the stress distribution of goaf and coal pillar after upper coal mining, and the plastic area produced by different arrangement of mining roadway. The results first show thatthe pressure relief area is formed in the goaf after 3# coal mining, the stress is concentrated in and under the coal pillar, and the vertical stress on the roof of 5#coal seam roadway is inversely proportional to the distance from the roadway to the coal pillar. Secondly,the external fault of roadway is serious, the internal fault pillar is large, and the plastic area appears at the top of the roadway when it is overlapped. The support optimization is controllable, and the roadway is overlapped from its economic point of view.

关 键 词：采空区 数值模拟 塑性区 布置方式 

分 类 号：TD822.2[矿业工程—煤矿开采]