云冈矿近距离煤层回采巷道支护技术研究

针对云冈矿近距离煤层采空区下51116巷支护难题,通过理论分析及现场实测相结合的方法,计算出上煤层回采过程中底板的最大破坏深度为4.07 m,并以4 m为界,对不同层间距制定了不同的支护方案,现场监测结果表明,顶底板最大移近量为83 mm,两帮最大移近量为94 mm。证明支护方案能够有效保证51116巷道围岩稳定性。

Study on Support Technology of Mining Roadway in Short Distance Coal Seam in Yungang Mine

In view of the difficult support problem of 51116 roadway under the Goaf in the close coal seam in Yungang mine,through the combination of theoretical analysis and field measurement,the maximum damage depth of the floor is calculated to be 4.07 m in the process of mining in the upper coal seam,and the boundary is 4 m,the field monitoring results show that the maximum displacement of roof and floor is 83 mm and the maximum displacement of two sides is 94 mm.It is proved that the support scheme can effectively guarantee the stability of surrounding rock of 51116 roadway.