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阶段矿房采矿法
块矿沿阶段高度方向只布置一个矿房，矿房用深孔〈中深孔〉落矿,并借重力放矿的空场采矿法。矿房采完后再用适当方法回采矿柱
expl.
block open stoping
;
block stoping
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