综采工作面软弱顶板巷道稳定性研究

Stability of Roadway with Soft Roof in Fully Mechanized Mining Face

为了预防布尔台煤矿22208综采工作面软弱顶板离层以及冒顶事故的发生,采用数值模拟分析了巷道围岩的变形量,针对离层量大于40mm的问题,对主运顺槽进行了加强支护。实际监测结果显示,加强支护方案下巷道离层量小于40mm,顶板下沉量和两帮收敛量较小,巷道处于稳定状态。

In order to prevent the occurrence of soft roof separation and roof fall in 22208 fully mechanized mining face of Buertai Coal Mine,the deformation of roadway surrounding rock was analyzed by numerical simulation.Aiming at the problem that the separation was more than 40 mm,the main transport chute was reinforced.The actual monitoring results show that under the strengthened support scheme,the roadway separation is less than 40 mm,the roof subsidence and the convergence of the two sides are small,and the roadway is in a stable state.