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扇形
放射状炮孔爆破
在小断面巷道内,向四周呈放射状进行钻孔爆破的方法。通常,在金属矿山的地下巷道中与漏斗孔联合使用,以实现集中采矿。它与常规的爆破方法相比,爆破块度小,爆堆集中装运方便,但是其钻孔和装药技术复杂
expl.
radial hole blasting
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