Sublevel caving without sill pillar is used in Xishimen Iron Mine.

西石门铁矿采用无底柱分段崩落采矿法开采.

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They are both composed of swarms of sublevel things.

它们都是由大量的亚层次物质组成的.

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This paper introduced the test study of upward sublevel filling method in this mine.

本文主要介绍了上向分段胶结充填采矿法在该矿的试验研究.

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Furthermore, its tech - economic indices are compared with those of the sublevel open stope method.

并将技术经济指标与分段空场法加以比较.

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The experimental study of sublevel stoping with tail filling and pre controlling of roof was introduced.

介绍了河东金矿预控顶分段空场尾砂充填采矿法试验研究.

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The calculation on working resistances of supports has been one of key research questions sublevel caving.

支架工作阻力计算是综放开采研究的主要问题之一.

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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.

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