sublevel caving mining [矿业] 分段崩落采矿 ; 放顶煤开采
pillar sublevel caving mining 有底柱分段崩落法
sublevel caving mining methed 分段崩落采矿法
longwall sublevel caving mining 综放开采
sublevel caving mining teclinology 放顶煤回采工艺
initial sublevel caving mining method 低分段崩落法
sublevel caving mining without pillars 无底柱分段崩落法
Analyses factors that affect cover caving ability of roof coal in sublevel caving mining method.
分析了放顶煤开采顶煤冒放性的影响因素。
The stoping scheme of sublevel caving and continuous mining was optimized, and optimization design of driving work was carried out.
优选出了分段凿岩连续崩矿回采方案，并对采切工程进行了优化设计。
Cut-off grade method has been used to control the ore drawing in non-pillar sublevel caving mining both in and outside China.
采用无底柱分段崩落采矿法，国内外一直采用截止品位放矿法来控制出矿。
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