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有底柱分段崩落采矿法
用中深孔或深孔在分段凿岩巷道中落矿,从分段底部的出矿巷道中岀矿的分段崩落采矿法。按回采中崩落方向不同,有底柱分段崩落采矿法可分为水平层落矿有底柱分段崩落采矿法和垂直层落矿有底柱分段崩落采矿法
expl.
sublevel caving with sill pillar
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