... underhand stoping 下向梯段回采 underhand stopping 下向梯段回采 underlie angle 与法线构成的偏角 ...
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underhand stoping with cemented filling 下向胶结充填采矿法
combined overhand and underhand stoping 上向下向梯段联合回采法
underhand slice stoping 下向分层采矿法
underhand d stoping 下向梯段回采
underhand cementing fill stoping 下向胶结充填采矿法
underhand drift cut-and-fill stoping 下向进路胶结充填采矿法
The underhand slice stoping with cemented filling is the most effective mining method for incompetant orebody with complicated mining conditions.
下向分层胶结充填采矿法是矿岩破碎、开采技术条件复杂的难采矿体最有效的采矿方法。
The underhand slice stoping method, with reinforced concrete for roof support, is recommended to mine narrow veins where the mining technological conditions are very complicated.
针对采矿技术条件复杂的薄矿脉开采，推荐采用有钢筋混凝土护顶的下向分层充填采矿法。
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