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| 上向台阶式回采在金属矿山广泛采用的采掘方法之一。即从巷道顶板开始,按台阶形状顺次采掘矿石的一种方法。上向台阶式回采,俗称仰挖台阶式回采和倒台阶式回采，有水平钻孔和垂直〈或有少许角度〉钻孔两种方式，也称上向式采矿法 | |||
| 上向梯段回采法 | |||
| overhand stoping: 3 phrases in 1 subject |
| Explosives and Explosive Ordnance Disposal | 3 |
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