梅山铁矿上向中深孔挤死爆破故障处理方法与实践

Treatment Method and Practice about Non-compensating Space Blasting Failure of Upward Medium-length Hole in Meishan Iron Mine

分析上向中深孔爆破产生的挤死爆破故障原因,优化传统挤死故障开凿切割巷道的方法,充分利用原设计炮孔布置,优化第一排炮孔的装药结构、起爆方式、雷管段位划分、堵塞长度,前一排爆破结束后,利用辅助探测系统和激光测距仪测得爆破效果;再根据测量结果调整后一排的装药参数,实现矿体节理裂隙充分发育、拉伸高度逐渐增高的目的,爆破3~4排后可利用悬臂梁结构释放补偿空间,将挤死爆破故障处理正常。此方法提高了梅山铁矿挤死爆破故障处理效率,对国内其他矿山处理类似爆破故障具有一定的借鉴意义。

The causes of non-compensating space blasting failure caused by medium-length blasting is analyzed,and the traditional treatment method of roadway drivage method is optimized. The original hole design is fully used,to optimize the factors of charging structure,blasting method,division of detonator segments and stemming length of the holes located at the first row. After the blasting of the holes of the first row,the blasting effects are monitored by auxiliary detection system and laser rangefinder. Based on the above monitoring results,the charging parameters of the holes located at the first row is optimized,so as to realize the fully development of joint fissure of ore-bodies,and its stretch height is increased gradually. After the blasting of the holes located at the third or fourth row,the compensate space is released based on cantilever beam structure,so as to deal with the non-compensating space blasting failure. The study results show that the treatment method proposed in this paper is help for improving the treatment efficiency of the non-compensating space blasting failure,which provide some reference for the treatment of the similar blasting failure of the other mines.