不同留巷宽度时沿空留巷围岩变形规律及控制技术

Deformation Laws and Control Technique of Surrounding Rock in Reserved Roadway along Goaf with Different Width of Reserved Roadway

针对沿空留巷留巷宽度过大时,围岩变形严重、支护困难等问题。结合某矿4304工作面回风巷具体工程概况,对不同留巷宽度时工作面走向塑性区变化、巷道围岩变形破坏规律进行了模拟分析,最终确定合理的留巷宽度为3.5 m。现场工业性试验表明:当采用留巷宽度为3.5 m时,围岩变形量得到有效控制,满足矿井安全生产。

When the width of the reserved roadway is too large,the surrounding rock deformation is serious and difficult to support.Combined with the specific project overview of return wind tunnel of No.4304 working face of a mine,the deformation of the plastic zone and the deformation law of surrounding rock of the roadway were simulated and analyzed for the different width of the reserved roadway,and the reasonable width of the reserved roadway was finally determined to be 3.5 m.On-site industrial tests show that when the width of the reserved roadway is 3.5 m,the deformation of the surrounding rock is effectively controlled to meet the safety production of the mine.