利用卸压巷道技术控制深井回采巷道变形破坏

煤矿深井回采巷道除受围岩压力影响外,还受回采工作面动压及相邻采空区基本顶运动的影响。巷道围岩变形破坏严重,底臌量大,维修困难。结合东海煤矿五采区左十二面回采巷道的地质和地压情况,提出了卸压巷道的解决方法,并分析了卸压巷道解决此问题的原理,对卸压巷道位置、支撑煤柱宽度、让压煤柱宽度、巷道宽度进行了计算。同时,将让压巷道作为回采工作面的排放瓦斯尾巷。东海煤矿的实践表明,该方法取得了很好的效果,卸压巷道在一定条件下可以解决深部巷道的变形问题。

Theoretical and practical study on supporting of yielding roadway in deep mine

The mining gateways in the deep mine are subjected to the surrounding rock pressure,the dynamic pressure of the coal mining face,and the movement of the main roof of the adjacent gobs beside the working face.The surrounding rocks occur with a serious deformation and destruction,a larger floor heave,and a difficult maintenance.This paper,building on the geological and earth pressure conditions of the mining gateways of left twelve working face at No.5 mining area of Donghai coal mine,introduces the yielding roadway,and describes the mechanism by which the problem is removed,calculation of the location of the yielding roadway,the width of supporting coal pillar,yielding pillar and gateway.The study allows the yielding roadway to be used as the leaving gas roadway in coal mining face.The practice,as is the case with Donghai coal mine,shows that when used under certain conditions,the yielding roadway,a method working with better results,is capable of taming the deformation occurring in deeper roadways.