钱家营煤矿1621E工作面采动覆岩破坏特征研究

Research on Failure Characteristics of Overburden Strata Induced by Mining the 1621E Working Face in Qianjiaying Coal Mine

工作面开采过程中上覆岩层破坏易产生安全事故,通过数值模拟的手段,得到了1621E工作面开采后煤层覆岩的位移和垂直应力分布特征,分析得出工作面开采后,上覆岩层的最大下沉量为3.1 m,上覆岩层的垂直应力下降。

The failure state of overburden strata will easily lead to accidents in the mining operation of working face. The strata vertical stress field and distribution figure of the strata migration of 1621 E working face were achieved by the numerical simulation method. The results show that the maximum subsidence of the overlying strata is 3.1 m after the mining of the working face, while the vertical stress of overlying strata decreases.