云冈煤矿近距离煤层下部煤巷掘进支护优化研究

为解决云冈矿近距离煤层下部掘进巷道破坏变形问题,通过现场监测、顶板窥视、优化试验等方法,分析了5409巷空间位置特征、破坏特征及支护方式适应性,提出了高强支护和注浆加固的围岩控制技术。优化后的巷道顶底板收敛保持在50mm内,两帮收敛保持在70mm内。

Study on the Optimization of Driving and Supporting in the Lower Part of the Short Distance Coal Seam in Yungang Coal Mine

In order to solve the problem of failure and deformation of the driving roadway in the lower part of the short distance coal seam in Yungang Mine,through the methods of on-site monitoring,roof peeping and optimization test,the spatial position characteristics,failure characteristics and adaptability of support mode of 5409 roadway are analyzed,and the surrounding rock control technology of high-strength support and grouting reinforcement is proposed.After optimization,the convergence of roadway roof and floor is kept within 50 mm,and the convergence of two sides is kept within 70 mm.