西石门铁矿采用无底柱分段崩落采矿法开采。
Sublevel caving without sill pillar is used in Xishimen Iron Mine.
无底柱分段崩落采矿法是一种高效安全的采矿法。
无底柱分段崩落采矿法存在损失贫化大和损失贫化难以控制的缺点。
Disadvantages of sublevel caving without sill pillar lie in high ore loss and dilution as well as difficult control of ore loss and dilution.
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。
Cut-off grade method has been used to control the ore drawing in non-pillar sublevel caving mining both in and outside China.
无底柱分段崩落采矿法是否适用于松软破碎矿体，一直是采矿界争论的焦点。
Whether the sill-free sublevel caving mining method is suitable to break and broken orebody has been being discussed for a long time.
在无底柱分段崩落采矿法中，铲运机由于其具有出矿效率高、机动灵活、多用性等优点而被广泛采用。
Scraper is widely used in pillarless sublevel caving due to its high ore drawing efficiency, mobility, flexibility and general purpose application.
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。
Sublevel caving method without sill pillar is adopted in the south section of Fengshan Copper Mine.
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