摘要
柳巷煤矿30105综放工作面与上一采区之间留设的煤柱为7m,本工作面初采时,采用产气具深孔预裂爆破切顶,加速了工作面老顶垮落,产生直接经济效益2370万元,降低了冲击波危害程度。
The coal pillar between 30105 fully-mechanized caving face of Liuxiang Coal Mine and upper No. 1 mining area is 7 m, in the initial mining of this workirig face, deep hole pre_splittirig blasting was applied to realize the top coal cutting,and has accelerated roof collapse of working face, the direct economic benefits reached to 23 million 700 thousand yuan, the harm of outburst wave was also reduced.
出处
《煤炭科技》
2017年第4期181-182,共2页
Coal Science & Technology Magazine
关键词
小煤柱
深孔预裂
加速垮落
small coal pillar
deep hole pre-splitting
accelerated caving
