Research and Application of Medium and Long Hole Blasting Technology in Mining Face of Pangpangta Mine
During the mining process,faults were exposed in the 5-109 working face of Pangpangta Coal Mine,which seriously affected the advancing speed of the working face.In order to solve the problem of rock cutting by coal mining machines passing through faults,it is proposed to use medium deep hole pre-splitting blasting technology to weaken the fault rock mass in advance,in order to meet the strength requirements of rapid rock cutting by coal mining machines.The pre-splitting blasting technical parameters were designed based on the geological conditions of the 5-109 cutting roadway and applied on-site.The on-site application results show that the pre-splitting blasting scheme is designed reasonably,the fault rock mass is effectively weakened,the daily footage of the mining face is increased by more than 90％,and the damage rate of the shearer cutting teeth is reduced by 70％.
mining facefaultpre-splitting blastingweakening of rock mass
NETL
NSTL
万方数据
