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| 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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