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room and pill stoping
expl.
房柱式开采法
房柱式开采法是一种矿柱成带状,采掘空间很大,后退式回收矿柱的开采方法。适用于矿层倾斜不大,开采价值较低的矿床。因此,广泛用于品位低但储量丰富,回采残留矿柱以提高采掘率的煤炭、岩盐和铁矿的开采。房柱式开采法可实现机械化采掘
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