冲击倾向性掘进巷道钻孔卸压技术应用分析

Application Analysis of Pressure Relief Technology by Drilling in Burst-potential Excavation Roadway

针对小庄矿掘进巷道冲击地压防治问题,拟采用理论分析、理论计算及现场实践的等方法进行分析探讨。本文以小庄煤矿东部进风大巷为工程实例,拟定采用钻孔卸压技术;分析认为,应变能和支承压力是诱导巷道围岩产生冲击地压的主要原因;通过应变能和支承压力分析计算,确定了钻孔卸压方案和参数;应用后,卸压效果显著,巷道围岩应力峰值减小了31%,残余支承压力峰值区域向煤柱内部转移20 m。

To solve the rock burst in intake airway in the east of Xiaozhuang Colliery,the authors present the pressure relief technology by drilling through theoretical analysis,theoretical calculation and field practice,determining the rock burst induction in surrounding rock of roadway by strain energy and abutment pressure,and the scheme and parameter of pressure relief by drilling through analysis calculation of strain energy and abutment pressure,which has reduced the stress peak of surrounding rock by 31%and transfer the stress peak area of the remaining abutment pressure to the interior of coal pillar by 20 meters with remarkable pressure relief effect.