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分段矿房采矿法
自上而下按分段开采阶段,分段划分为若干矿房和矿柱〈顶柱,或顶柱、间柱〉,回采矿房时空区借矿柱支撑、并在空场条件下借重力或重力一爆力运搬岀矿的采矿法。不留间柱时,矿房沿矿体走向连续回采并滞后按步距回采顶柱, 留间柱时采完矿房后,随即同时或分次〈先间柱后顶柱〉回采间柱和顶柱, 崩落顶柱矿石在崩落覆岩下放出
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