2) borehole pressure relief
钻孔卸压
1.
Numerical simulation of small pillar stress concentration areas borehole pressure relief effect
小煤柱应力集中区钻孔卸压效果的数值模拟
2.
Numeric simulation of borehole pressure relief preventing roadway rockburst of a mine
钻孔卸压防治巷道冲击地压的数值模拟
3) screwing and drlling
拧卸钻孔
4) discharged-pressure hole
卸压孔
1.
That is to say,to increase discharged-pressure hole and gas releasing hole,improve coalfield ventilation to release pressure by getting into deep and natural drilling.
本文介绍了采用煤体注水法均匀释放瓦斯,增加卸压孔和瓦斯释放孔,穿层钻孔抽放,顺层钻孔抽放,增加煤体透气性,使煤体卸压,达到瓦斯释放效果。
5) oil pressure relief hole
油卸压孔
6) explored press drilling
探压钻孔
补充资料：冲击波超压与动压