某露天矿山无超深台阶爆破实践

影响露天台阶爆破效果的两大不利因素是根底和大块。在某石灰石露天矿山开采中，通过钻凿倾斜炮孔，爆破体底盘增钻部分抬炮的措施，探索出无超深台阶爆破的若干技术,取消爆破超深，有效地提高了炮孔的利用率,降低了炸药单耗，减少了根底和大块,改善了爆破效果,矿山的经济效益明显改观。

Practice of non ultra deep bench blasting in an open pit mine

The two major unfavorable factors affecting the blasting effect of open-pit Bench are foundation and large block. In the mining of a limestone open-pit mine, through the measures of drilling inclined blast holes and increasing the drilling part of the blasting body chassis, some technologies of non ultra deep bench blasting are explored. The ultra deep blasting is cancelled, which effectively improves the utilization rate of blast holes, reduces the unit consumption of explosives, reduces the root and large blocks, improves the blasting effect, and the economic benefits of the mine are significantly improved.