密集钻孔,dense boreholes
1)dense boreholes密集钻孔
1.The pre-drainage technology withdense boreholes is a preventive measure for the coal and gas outburst.密集钻孔预抽瓦斯技术是一种防止煤与瓦斯突出的措施,钻孔在煤层中所形成的应力分布、透气性规律和瓦斯的流动过程是极其复杂的问题,本文主要采用实验室试验和数值试验进行了系统研究,即采用平面应变模型,揭示密集钻孔的透气性、应力分布、塑性区和卸压区的范围、煤层瓦斯压力变化、预抽半径和钻孔瓦斯流量等问题。
英文短句/例句
1.Model Experiment of Gas Permeability Distribution Rule around Dense Boreholes密集钻孔周围透气性分布规律的模型实验
2.Laboratory and Numerical Test Studies of Gas Pre-drainage with Dense Boreholes in Outburst Coal Seam;突出煤层密集钻孔瓦斯预抽实验室与数值试验研究
3.Experimental Investigation of Three-phase Foam Sealing Liquid for Gas Pressure Determination Borehole测压钻孔三相泡沫密封液的试验研究
4.Penetration Mechanism of DTH Percussion Compact Drilling and Experimental Research on Compact Bit;潜孔锤冲击挤密钻进机理及挤密钻头的设计与实验研究
5.A New Algorithm for Mineral Storage Calculation Based on Voronoi Diagram of Point-sets of Drill Holes;基于钻孔点集Voronoi图的矿产储量新算法
6.Effect of Drilling Fluid Density on Neutron Porosity in Underbalanced Drilling欠平衡钻井条件下钻井液的密度对中子孔隙度测井的影响
7.Field tests on pre-bored compaction lime-soil pile(down-hole dynamic compaction method) to improve serious collapsible loess钻孔挤密桩处理强湿陷性黄土地基试验研究
8.Design of Composite Foundation with Drilling Ram-expanded Piles in Collapsed Loess湿陷性黄土钻孔夯扩挤密桩复合地基设计
9.tap(ping) drill螺丝孔钻，螺丝底孔钻
10.The sorker was drilling.此工人在用钻孔机钻孔。
11.dirll ,ultrasonic, for use with minerals or with ceramic substances for integrated circuits超声钻孔机,用于矿物体或集成电路的陶瓷基片
12.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
13.Simulation and analysis of three-dimensional flow field in punched apron compact spinning钻孔皮圈集聚纺纱系统三维流场的模拟与分析
14.Any of numerous hand tools for boring holes.钻孔工具，手钻钻孔用的手持工具
15.kelly for well-drilling machiens旋转钻孔,钻井机用
16.A tool used for drilling.钻头用于钻孔的工具
17."at no time should hole be made in top of control panel, unless proper sealing devices are utilized. "除非采用适当的密封设施,否则绝对不要在控制面板上钻孔。
18.The Application of Directional Drilling and Towing High-Density Polyethylene(HDPE) Pipe in Municipal Pipeline Engineering;定向钻孔牵引高密度聚乙烯管材在市政管道工程中的应用
相关短句/例句
precision drilling精密钻孔
3)borehole sealing钻孔密封
1.Based on fluid mechanics and the Newton law of friction,a model ofborehole sealing mechanism is established.以流体力学、牛顿摩擦定律等为基础,建立了钻孔密封机理模型,得出了钻孔周边缝隙流体流动及泄漏量计算公式,分析了提高钻孔密封效果的影响因素。
4)bundle drills集束钻孔
1.Based on analyzing the characteristics of ventilation system patterns and measuring the parameters of gas at coalfaces,the structure of three-dimensional "W" aerodynamic system is designed based on the theory of aerodynamics,which consists of U ventilation system,bundle drills and pumping roadways.本文对已有工作面通风系统模式特点进行综合分析和现场通风瓦斯参数测定的基础上,应用空气动力学理论设计了高瓦斯高产工作面的“‘U 通风系统+集束钻孔+高抽巷”的立体“W”型空气动力学系统结构。
5)close drilling密集钻眼
6)multi-hole concentration多孔密集
1.The paper introduces the design course of the modular machine tool formulti-hole concentration gearbox.介绍了多孔密集型箱体组合机床的设计过程,实际证明该机床设计严谨规范,又有技术创新,使用效果良好。
延伸阅读
导弹射击密集度导弹射击密集度missile firing dispersiondaodan sheli miiidu导弹射击密集度(missir。firing disper-sion)导弹炸点对散布中心的聚集程度。它与导弹射击准确度构成导弹命中精度。衡量射击密集度的尺度是炸点偏差的均方根偏差或方差。在导弹射击系统偏差很小时，导弹射击密集度近似反映导弹命中精度。在实际使用中，导弹射击密集度通常以圆概率偏差(CEP)或概率偏差表示。导弹射击密集度的大小取决于制导方法、导弹及其制导仪表的制造、射击诸元准备和操作，以及飞行中其他一些偶然因素干扰引起的随机偏差。为提高导弹射击密集度，需完善制导方法，提高导弹的制造精度、射击诸元准备和操作手操作的准确度，减少偶然因素的干扰，缩小各种随机偏差等。对射程较远的弹道导弹，在弹道主动段、中段和末段均进行制导，可使射击密集度(圆概率偏差)达几百米，几十米或更小。(康景良)
