1) safety rock pillar
安全岩柱
1.
The driving technology with reservation safety rock pillar and secondary lane is applied in the rock roadway near outburst coal seam.
近突出煤层岩巷采用预留安全岩柱二次成巷掘进技术,可实现安全快速掘进,具有很好的经济和社会效益,对类似条件的巷道掘进具有一定的指导意义。
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 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
4) safe coal pillar
安全煤柱
1.
Study on safe coal pillar design and sub-grade stability of freeway in unexploited coal zone;
高速公路压煤区安全煤柱留设及其对路基稳定性的影响
5) drillstring safety
钻柱安全
6) safety ore pillar
安全矿柱
1.
Without other safety measures, some safety ore pillars have to be reserved to prevent the ground buildings and constructs and the main shafts from being damaged during underground mining.
矿床地下开采时,在没有其他安全措施的情况下,不得不采用预留安全矿柱的方法,以保护地面建筑物、构筑物和主要井巷免受因地下采矿而引起的破坏。
补充资料：安全
没有危险；不受威胁；不出事故：～操作ㄧ～地带ㄧ注意交通～。
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