集贤煤矿深孔断顶爆破卸压钻孔间距优化  

Drilling Holes Spacing Optimization for Breaking Roof Blasting Pressure Releasing in Deep Hole of Jixian Coal Mine

作　　者：刘黎[1,2] 李树刚[1,2] 刘超[1,2] 邢立杰[2] 

机构地区：[1]西安科技大学西部矿井开采及灾害防治教育部重点实验室,陕西西安710054 [2]西安科技大学能源学院,陕西西安710054

出　　处：《煤矿安全》2015年第10期137-139,共3页Safety in Coal Mines

基　　金：国家自然科学基金科学仪器基础研究专款资助项目(51327007);国家自然科学基金资助项目(51304154;51174157)

摘　　要：为了保障集贤煤矿西二采区左一片工作面安全回采,采用深孔断顶爆破技术对冲击地压进行防治。通过理论计算,初步确定了爆破孔间距为4.8 m,并选取3、5、7 m 3组钻孔间距进行工业试验,采用钻孔窥视技术对爆破效果进行了对比分析。结果表明:随着钻孔间距的增大,钻孔间裂隙发育长度、发育密度、孔隙度都有减小的趋势。为了保证预裂爆破效果,并考虑工程量和成本投入,最终确定预裂爆破钻孔合理间距为5 m,为下阶段的深孔爆破防治冲击地压提供了一定指导和参考。In order to guarantee the safe mining of left 1#working face of west 2#mining area,the deep hole blasting technology has been used for rock burst prevention. The blasting hole spacing was preliminarily determined by 4. 8 m through theoretical calculation,three groups of 3 m,5 m and 7 m drilling holes spacing were chosen for industrial test,and blasting effect was analyzed by use of drilling hole imaging technology. The results show that fracture length,development density and porosity has a tendency to decrease with the increase of drilling hole spacing. In order to guarantee the blasting effect,and considering the quantities and costs,eventually,the reasonable drilling hole spacing of 5 m is determined,it provides a certain guidance and reference for the next phase of deep hole blasting in rock burst prevention.

关 键 词：冲击地压 深孔爆破 爆破参数 钻孔间距 优化试验 断顶爆破 

分 类 号：TD324[矿业工程—矿井建设]