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| 钻台底部水平炮孔; 钻凿蛇穴炮孔爆破巨砾的 - 种方法,在工作面下方或在垂直梯段面前方稍微下向钻孔，通常用于除去前次爆破所造成的残底。当用于爆破巨砾时，则在巨砾下部钻一炮孔，孔内装药爆破 | |||
| snake-holing: 3 phrases in 1 subject |
| Explosives and Explosive Ordnance Disposal | 3 |
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