... 下放钻柱测井底 look for bottom 底柱 Foot – note ; sill pillar 底柱结构 construction of sill pillar ...
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cone-shape sill pillar 漏斗底柱结构
construction of sill pillar 底柱结构
stope sill pillar 采场底柱
sill pillar removal 底柱回收
sill pillar recovery 底柱回采
sublevel caving without sill pillar 无底柱分段崩落采矿法 ; 无底柱分段崩落法
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。
Sublevel caving method without sill pillar is adopted in the south section of Fengshan Copper Mine.
丰山铜矿南缘采区应用无底柱分段崩落法采矿。
The paper is of important instructive importance to reduce loss and depletion by sublevel caving method without sill pillar.
并对今后无底柱分段崩落法降低损失贫化具有重要的指导意义。
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