卸压钻孔,destressing boreholes
1)destressing boreholes卸压钻孔
英文短句/例句
1.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
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.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
4.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。
5.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
6.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
7.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
8.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
9.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
10.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
11.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
12.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
13.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
14.hydraulic gait-model all-auger drilling machine液压步履式螺旋钻孔机
15.horizontal borehole pressure recorder水平钻孔压力记录器
16.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
17.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
18.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
相关短句/例句
borehole pressure relief钻孔卸压
1.Numerical simulation of small pillar stress concentration areasborehole 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 ofborehole 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 increasedischarged-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
延伸阅读
冲击波超压与动压
[解释]：核爆炸产生的高温、高压火球膨胀，在周围介质中形成连续向外传播的压力脉冲（或冲击波），冲击波阵面传播到空间某点时，超过周围环境大器的压力称超压；空气粒子高速随波阵面运动产生的冲击压力称动压。超压和动压都以帕斯卡（Ｐａ）为主单位。超压随时间的变化取决于爆炸威力、距爆点的距离和爆心周围的介质情况。特定地点的峰值超压一般出现在冲击波阵面到达该点的瞬间，超压在该点的持续时间称为正压作用时间。尔后，该点的压力下降到低于周围压力，称为负压，再逐渐回升到周围压力值。对人员的直接冲击伤，超压为２０—２９千帕可引器轻度伤；２９—５９千帕可导致中度伤；５９—９８千帕可造成重度伤；大于９８千帕可造成极重度伤。动压为１０—２０千帕可造成中度伤；２０—３９千帕可造成重度伤；大于３９千帕可造成极重度伤。动压的推动、抛掷和超压的挤压会造成物体变形和毁坏。
