oil pressure relief hole

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。

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

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

Discussion on application of borehole pressure reliefcontrol rockburst hazard

应用卸压钻孔防治冲击地压灾害的探讨

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

Pressure releasing and gas drainage with long bore hole in roof overburden of fully mechanized caving face

综放面顶板覆岩走向长钻孔卸压抽放瓦斯研究

The borehole must be drilled at correct place，and the gas pressure will be relieved.

没有卸不了压的瓦斯，只有打不到位的钻孔。

Study on Technology of Surface Drillings Draining Pressure Relief Gas of Coal Seam by Protected;

地面钻孔抽采被保护层卸压瓦斯技术研究

Numerical Simulation Optimization for Release Pressure Bore Hole of Roadway Floor in Three Soft Coal Seam

三软煤层巷道底板钻孔卸压的数值模拟优化

Practice on Relieving Shot Controlled by Borehole and Increasing Air Permeability Coefficient of Seam

钻孔控制卸压爆破增加煤层透气性系数的实践

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

Study on Technology of Bores Through Coal and Rock Seams Draining Long Distance Pressure Relief Gas in Bed Plate Tunnel;

底抽巷上向穿层钻孔抽放远程卸压瓦斯技术研究

Testing Research of Laneway Wall Rock Stress Released by Advanced Bore Decompression Explosion Technique

超前钻孔卸压爆破技术释放巷道围岩应力试验研究

Change Rule of Initial Speed of Gas Emission From Borehole in Outburst Coal Seam Before and After Pressure Relief

突出煤层卸压前后钻孔瓦斯涌出初速度的变化规律

Numerical Simulation Research of Pressure Relief Mechanism of Borehole of Small Pillar Stress Concentrated Areas

小煤柱应力集中区钻孔卸压机理的数值模拟研究

THE RESEARCH ABOUT MECHANISM ON UNLOADING TIME EFFECT CAST-IN-PLACE BORED PILES

钻孔灌注桩成孔卸荷时效性理论研究

hydraulic gait-model all-auger drilling machine

液压步履式螺旋钻孔机

horizontal borehole pressure recorder

水平钻孔压力记录器

Analysis on Mining Released Gas Sources for Surface Borehole Drilling and Gas Drainage

地面钻井抽采采动卸压瓦斯来源分析

Manufacture and Application of Two Disassembly Bars for Bored Grouting Pile

两种钻孔灌注桩可拆卸吊筋的制作与使用

Research and Application of Hydraulic Flushing Improving Permeability and Relieving Pressure Technology

水力冲孔卸压增透技术的研究与应用