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在坚硬岩石(硅卡岩、花岗岩、细晶大理岩,f=10~12以上)的掘进中,由于炮眼排列、装药技术等不合理,导致爆破效率低、炸药消耗高和瞎炮多等现象,严重影响掘
In the tunneling of hard rock (siliceous rock, granite and fine-grained marble, f = 10 ~ 12), the blasting efficiency is low, the explosive consumption is high and the blind gun is more Phenomenon, seriously affect the digging