The paper introduced the blasting design for recovery of the crown pillar in detail.
文中较详细地介绍了该顶柱回采的爆破设计。
The crown pillar of stope is permanent loss and not recoverable, while sill pillar and barrier pillar shall be recovered after the ore drawing work is completed.
采场的顶柱作为永久矿柱损失，采场底柱、间柱等采场大量放矿完毕后，一次性进行回收。
Based on the existing conditions, Pindu Municipal Gold Mine preferred short-hole shrinkage stoping without sill, intermediate and crown pillar to other mining methods and obtained excellent result.
平度市金矿利用现有的条件，因地制宜采用“三无”即无底、间、顶矿柱浅扎留矿法，收到了好效果。
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