卧龙湖煤矿8101工作面采动覆岩破坏特征研究

煤矿开采过程中覆岩破坏容易引发工作面溃砂、突水事故,为了保证卧龙湖煤矿8101工作面安全开采,根据矿区覆岩工程地质特征及矿区岩层柱状图,建立了FLAC3D数值模拟模型.通过FLAC3D软件模拟,得到了工作面推进时的覆岩应力场及覆岩塑性区分布图,由此分析得出在开切眼和煤壁处覆岩主要为剪切破坏,采空区上部主要为拉伸破坏,得到煤层开采时覆岩最大主应力1.78MPa,最大导水裂隙带高度31m.

Research on failure characteristics of overburden strata induced by mining the 8101 working face in WoLonghu coal mine

The failure state of overburden strata will easily lead to collapse of sand and water inrush accident in mining. In order to ensure the safety mining operation of 8101 mining face of WoLonghu coal mine, numerical simulation models is established according to the strata engineering and geological features and the strata column in the mining area. Through the simulation of FLAC3D, the strata stress field and distribution figure of the strata plastic area was obtained when the coal mining face advanced forward in different distances. The results indicate that shearing failure zone was mainly occurred at the open -off cut and coal wall. The tensile failure zone was mainly occurred at the strata above the goal and the height of water conducting fractured zone is 31 m.