下部近浅埋煤层复采覆岩运移规律

Repeated Mining Overburden Strata Movement Laws in Lower Nearly Shallow Buried Coal Seam

摘要: 综合采用数值模拟和理论分析的方法，着重研究上湾煤矿下部煤层开采过程中上覆岩层的运移规律。研究表明，上煤层已采情况下，下部煤层开采时单一关键层破断后形成的砌体梁结构较为稳定，并且下部煤层上覆岩层没有出现台阶下沉状况，地表下沉也较为缓慢，其动载现象与浅埋煤层相比不明显。

Abstract: Using numerical simulation and theoretical analysis method, the paper focuses on the movement laws of overburden strata in the mining process of lower seam. The research shows that when the upper mining coal seam has been mined, the masonry beam structure formed after the rupturing of the single key layer is relatively stable in the mining process of lower coal seam, and the lower seam overburden does not appear the condition of stage sinking, and ground depression is relatively slow, and the dynamic upload phenomenon is not obvious compared with the shallow coal seam.