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| 科罗门脱型掏槽 | |||
| 克罗曼特掏槽克罗曼特掏槽是从直孔掏槽演变而来的一种爆破掏槽形式。直孔掏槽必须钻平行炮孔，但是使用小的轻型凿岩机钻凿平行炮孔非常困难。克罗曼特掏槽是在中心钻凿两个相交的大孔〈直径100mm〉作为自由面，再爆中心孔周围的其他炮孔 | |||
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