pillar sublevel caving mining 有底柱分段崩落法
longwall sublevel caving mining 综放开采
initial sublevel caving mining method 低分段崩落法
sublevel caving mining without pillars 无底柱分段崩落法
mining with sublevel caving 放顶煤开采
longwall mining with sublevel caving 长壁放顶煤采煤法
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。
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。
This paper discusses the law of the ore drawing about Sublevel Caving Mining, and analyzes the reasons for the dilution and loss.
探讨了无底柱分段崩落法放矿规律，分析了造成损失贫化的原因。
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