1) waterproof rock pillar
防水安全煤岩柱
1.
Determination of waterproof rock pillar height with the top coal caving under sea
海下综放开采防水安全煤岩柱厚度的确定
2) safety pillars
安全煤岩柱
1.
On this basis,the height of "two zones"and the reasonable size of safety pillars were predicted.
在此基础上,预计了"两带"高度,探讨了安全煤岩柱合理尺寸,使开采上限提高了30 m煤柱,解放呆滞煤量73。
3) waterproof pillar
防水煤岩柱
1.
Beacuse of actual mining situation in two huai coal mine with representative sections coal mine are collected,concludeod,trsted and lresearched,this paper expounds meaning,kind,action,restricting connections,factors of influence,counting method and defining prinple with waterproof pillar,compressing height to reasonable size scope with waterproof pillar is a main way.
基于对两淮矿区具有代表性部分矿井实际开采情况的搜集、归纳、试验和研究 ,从理论与实践的初步结合上阐述了防水煤岩柱的含义、种类、作用、制约关系、影响因素、计算方法、确定原则等等 ,并相应提出了压缩防水煤岩柱高度至合理尺寸范围的主要途径。
5) height of waterproof coal (rock) pillar
防水煤(岩)柱高度
补充资料：防水
1.犹防川。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条