高应力破碎顶板煤巷围岩破坏机制及复合支护设计

Failure mechanism and compound support design in high stress coal roadway with fragile roof

随着煤矿开采深度的不断增加,深部地质力学环境变得更为复杂,地应力越来越大,给煤矿巷道支护和开采带来很大困难.运用数值模拟试验和现场工业性试验,对深井复合高应力破碎顶板软岩巷道的支护问题进行了研究,提出对该类型巷道采用以锚网索槽钢为主的复合支护形式.实践证明,以锚网索槽钢为主的复合支护形式,必要时进行注浆加固,能有效控制巷道围岩变形,保证巷道的安全使用.

With the mining depth increasing and deep geological mechanics environment becoming more complex, the ground stress becomes more and more stronger, which brings more difficulty to roadway support and mining. The supporting problem of high stress and fractured roof soft rock roadway in deep underground was studied. By using numerical simulation and industrial experiment, the paper puts forward the compound support with bolt - mesh - cable and channel steel in this kind of roadway. Practice has proved that the compound support with bolt - mesh - cable and channel steel combined with grouting if necessary can effectively control the displacement of the roadway surrounding rock and achieve good reinforcement effects, which ensure the safe use of roadway.