王坡煤业大断面巷道支护方式优化

Optimization of Supporting Mode of Large Section Roadway in Wangpo Coal Industry

为解决王坡煤业大断面巷道片帮失稳的问题,通过实验室测定巷道周边围岩力学参数、现场调研巷帮的破坏形式,并采用FLAC3D进行数值模拟分析,得到了支护方式优化后的支护参数。现场实践表明:帮锚杆长度为3.0 m、肩锚杆与水平方向的夹角为15°、每帮锚杆数量为4根时,对巷帮围岩控制效果较好。

To solve the problem of rib spalling instability of large section roadway in Wangpo Coal Industry,the mechanical parameters of surrounding rock around the roadway are measured in the laboratory,the failure mode of roadway is investigated on site,FLAC^(3D) is used for numerical simulation analysis,and the optimized support parameters are obtained,whose field practice shows that when the length of the side bolt is 3.0 m,the angle between the shoulder bolt and the horizontal direction is 15°,and the number of per side bolt is 4,the control effect on the surrounding rock of the laneway’s side is better.