新元煤矿动压巷道围岩控制技术研究与应用

Research and application of surrounding rock control technology for dynamic pressure roadway in Xinyuan Mine

针对新元煤矿采掘接替困难、资源浪费严重的问题,设计通过沿空留巷技术将9104回采工作面的2条巷道保留下来,为9105工作面服务,为解决9104回风巷在工作面回采动压及留巷卸压作用影响下的支护问题,通过工程类比、数值模拟等方法对其支护方案进行优化。现场应用及监测结果表明,巷道围岩整体稳定性较好,通过卧底、扩帮后能够作为9105工作面进风巷使用。

In view of the difficulties in mining replacement and serious waste of resources in Xinyuan Mine, the design of the two roadways of the 9104 mining face was retained by the roadway retaining technology to serve the 9105 working face.In order to solve the 9104 return airway at the working face, supporting problems under the influence of dynamic pressure and residual pressure relief were optimized by engineering analogy and numerical simulation. The field application and monitoring results showed that the overall stability of the surrounding rock of the roadway was good, and it could be used as the air inlet roadway of the 9105 working face through the undercover and expanded.