高河矿E2305运输平巷破坏特征与支护参数优化

Failure Characteristics and Support Parameters Optimization of E2305 Transportation Roadway in Gaohe Coal Mine

针对高河煤矿E2305运输平巷锚杆(索)破断问题,通过现场实测和数值模拟分析了E2305运输平巷受一次和二次采动影响时围岩受力情况和破坏特征。结果表明,在一次回采影响稳定阶段,E2305运输平巷围岩变形较小,在二次回采超前阶段,围岩变形有明显增大。为了防止巷道发生冒顶事故,根据E2305运输平巷围岩破坏规律,提出了新的支护方案,保证回采作业安全进行。

According the problem of the bolt（cable） breaking in the E2305 transportation roadway of Gaohe mine,through field measurement and numerical simulation the stress situation and failure characteristics of the surrounding rock of the E2305 transportation roadway affected by the primary and secondary mining are analyzed.The results show that the deformation of surrounding rock of E2305 transportation roadway is small during the stable stage of the first mining,and the deformation of the surrounding rock is significantly increased in the advanced stage of secondary mining.In order to prevent roof falling accidents,according to the failure law of surrounding rock in E2305 transportation roadway,a new support scheme is put forward to ensure the safety of mining operation.