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。
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。
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。
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