二次支护参数及支护时机对极软岩层巷道稳定性的影响  

The Influence of Secondary Supporting Parameters and Secondary Supporting Time on Tunnel Stability in Extremely Soft Rock

作　　者：张传艳[1] 

机构地区：[1]贵州大学职业技术学院,贵州贵阳550003

出　　处：《煤矿安全》2013年第10期172-175,共4页Safety in Coal Mines

摘　　要：为解决砂坝煤矿围岩支护问题,提出了包括二次支护参数和二次支护时机在内的支护方案,并考虑了锚索长度l a、锚索的间排距e a×i a和二次支护时机位移值d a等3个因素,采用正交试验重点对二次支护进行16个方案的设计,并分别分析了不同二次支护时机位移值对巷道稳定性的影响,并进行实际应用,取得了良好的效果。In oMer to solve the supporting problem of surrounding rock in Shaba Coal Mine, the paper presents scheme including sec- ondary supporting parameter and secondary supporting time, considering three factors about the length of anchor cables l, intervals of anchor cables e x i and displacement values of secondary supporting time d,. It adopts orthogonal tests to design 16 schemes of see- ondary supporting and analyzes different influence ranges of secondary supporting opportunity on tunnel stability. It has a good effect on application.

关 键 词：极软岩层 二次支护参数 二次支护时机 正交试验 

分 类 号：TD353[矿业工程—矿井建设]