Study on high sublevel stoping of shallow - hole shrinkage system with sill pillar in thin - small ore body 薄小矿体有底柱浅孔留矿法高分段回采的研究
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The application of shallow - hole shrinkage mining with flat - bottom structure for separate handling of ore and waste rock in irregular and massive orebody 平底结构矿岩分运浅孔留矿法在不规则厚大矿体中的应用