浅埋深薄基岩软岩条件下工作面巷道支护优化研究

Research on optimization of roadway support in working face under the condition of shallow burial and deep thin bedrock and soft rock

针对浅埋深软弱破碎顶板巷道支护困难的问题,以新矿集团伊犁四矿21113工作面回风巷为例,围绕巷道特征、煤(岩)赋存、地质构造、围岩结构和地应力等进行分析,运用FLAC^(3D)软件对围岩应力及位移演化特征进行模拟,对比分析了21113工作面回风巷顶部分别采用锚杆锚索支护和全锚索支护时的巷道围岩位移、应力变化特征及塑性破坏情况,确定采用锚杆锚索优化支护方案,取得预期效果。

Aiming at the difficulty of supporting the roadway with shallow burial depth and weak broken roof,taking the air return roadway of 21113 working face in Yili No.4 Mine of Xinkuang Group as an example,it focused on roadway characteristics,coal(rock)occurrence,geological structure,surrounding rock structure and in-situ stress et al,and used FLAC^(3D) software to simulate the evolution characteristics of surrounding rock stress and displacement,and compared and analyzed the roadway enclosures when the top of the 21113 working face return airway was supported by bolts,bolts and cables,and supported by all cables.Rock displacement,stress change characteristics and plastic failure conditions,determined the use of bolts and cables to optimize the support plan,to achieve the expected results.