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| 无支护采矿法采掘时,在开挖面的上、下盘均不设支护的采矿法,有以下6种方式: 1. 上向台阶法。 2. 下向台阶法。 3. 中段采掘法。 4. 井下漏斗法。 5. 矿房矿柱法。 6. 留矿法〈shrinkage stoping。与上述方法对应的是有支护采矿法 (supported stopes) | |||
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open stopes : 9 phrases in 2 subjects |
| Explosives and Explosive Ordnance Disposal | 6 |
| Technology | 3 |
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