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针对采空区下近距离煤层巷道围岩较破碎的状况,结合谢桥矿11426留巷工作面实际条件,通过理论计算得出了上层煤开采后对底板煤岩层的破坏深度及影响范围,运用数值模拟软件总结出了采场下方应力分布特征。通过采用中空注浆锚索二次加固围岩及留巷顶板主动控顶技术,保证了矿井安全。
Aiming at the situation of broken surrounding rock of coal seam roadway near coal mined area and the actual conditions of 11426 retaining roadway in Xieqiao coal mine, the damage depth and influence range of coal seam to rock seam after mining of upper coal seam are obtained through theoretical calculation. Numerical simulation software summarizes the stress distribution characteristics of the stope. Through the use of hollow grouting anchor cable secondary reinforcement of retaining roof and retaining roof active roof control technology to ensure mine safety.