... productionore回采矿石 abstractionofpillar回采矿柱 percentageextraction回采率 ...
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后退式回采矿柱 drawing back of pillars
矿柱回采 pillaring ; Pillar stoping ; Pillar extraction ; Ore pillar extraction
敞开进路式矿柱回采法 [矿业] open-end method
高阶段矿柱回采 High level pillar mining
用尾砂分层充填法回采矿柱，取得了很好的经济效果。
Excellent results were obtained in mining of pillars using tailings in horizontal cut-and-fill.
在空区未充填的情况下回采矿柱，矿柱与采空区顶板的稳定性是一个关键问题。
The stability of the ore pillar and the roof is a key issue in the pillar recovery in unfilled mined-out area.
在空区末充填的情况下回采矿柱，矿柱与采空区顶板的稳定性是一个关键问题。
The stability of the ore pillar and the roof is a key issue in the pillar recovery in unfilled mined - out area.
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