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Gas pressure in coal seam 煤层瓦斯压力
The inversive calculation result showed that the permeability coefficient of coal seam and its changing condition can be determined by seam gas Pressure. 算例反演的结果表明，利用反演方法能够通过煤层瓦斯压力确定煤层的透气性系数及其变化状况。
Determinating methane pressure in coal seam application with the method of desorption of drill-cuttings 利用钻屑解吸法测定煤层瓦斯压力的应用
It used draining while mining and light &middle pressure water injection in coal seam, those completely eliminated the danger of coal and gas outburst. 在生产过程中，采用边采边抽和浅孔中压注水措施，完全消除了工作面的突出危险性。
Coal gas dynamics is a frontier geoscience that makes a special study of the law for gas flow and the pressure distribution in coal seam of gaslogged strata as well as gas dynamic variation. 煤层瓦斯动力学是一门主要研究煤(岩)层内瓦斯(煤层气)运移和分布规律的边缘地球科学。
Gas Drainage of undischarged pressure hole at original coal seam is an indispensable link in coal mine production.The result of releasing gas depends on natural ventilated coefficient. 本煤层未卸压钻孔抽放,是煤矿生产系统中不可缺少的环节,由于煤层的天然透气系数不同,抽排瓦斯的效果也不同。
Taken Xinhe Colliery 3101 workface as the concrete condition, phenomenon law of underground pressure in great-inclined thick coal seam mechanized top coal caving is studied. 本文以新河煤矿3101工作面为具体条件，研究了大倾角厚煤层综放开采矿压显现规律。
Little faults in coal seam are important for coal and gas outburst prevention and control,and water outburst prevention and control. 煤层小断层对矿井煤与瓦斯突出及矿井突水防治具有重要的实际意义。
The gas is stored under pressure in the tank. 该气体在压缩状态下贮存于罐中。
Measuring pressure of gas in coal seam 煤层瓦斯压力测定
Action mechanism analyzing of gas pressure in the top coal caving of steep seam 瓦斯压力对急倾斜煤层放顶煤的作用机理分析
The decaying gas pressure in arc extinguish chamber will cause the supply voltage to be beyond the endurance of a vacuum switch. 本文利用自行开发的电场探头研究了真空开关屏蔽罩电位的有效值与真空度之间的关系,得出了相应曲线。
The way and principle of Gaussian curvature method for forecasting natural fracture zones in coal seam are discussed. 摘要论述了高斯曲率法预测煤层天然裂隙发育区的基本原理和方法。
The relationships between the permeability of the methane gas in coal seam and surface fractal dimension and tortuosity fractal dimension are proposed based on fractal theory and Darcy Law. 基于分形理论和达西定律,研究了孔隙的弯曲分形维数和表面积分形维数与瓦斯渗透率参数之间的关系;
As the gas pressure in discharge chamber varies within the operation range the percentages of metal and halogen ions in total beam current vary with it. 那就是,放电室内的气压在工作范围内变化时,离子束中金属离子和卤素离子的含量也都随之改变。
Because of high gas pressure in TEA CO2 laser,arc discharge could occur easily,resulting in the stopping of laser pumping. So the use of preionization technique is very imPortant. 在TEACO2激光器中，由于气压高，很容易形成弧光放电，导致激光作用停止，因此采用预电离技术是十分重要的。
Outburst prevention technique of excavating in coal seam will be directly concerned colliery safety production and excavates taking over. 摘要突出煤层煤巷掘进防突直接关系到煤矿的安全生产和采掘接替。
The studies also show that magnetized water has a good application prospect in coal seam infusion. 磁化水在煤层注水方面具有良好的应用前景。
MEANWHILE, THE AIR VALVES MAKE THE GLEITHRETTER OF THE AIR VALVE OPEN AND CLOSE AUTOMATICALLY WITH THE CHANGING OF GAS PRESSURE IN THE AIR CYLINDER TO FINISH GAS ENTRY AND EXHAUST AUTOMATICALLY. 同时，气阀随着气缸内气体压力的变化而使气阀的滑片自动开启和关闭，所以可自动完成进气、排气的过程。
With the tectonic geological methods the development properties,the forming mechanics of faults in Coal Seam 11-2 in Payi Coal Mine are analyzed. 采用构造地质学的方法,对潘一煤矿井田内11-2煤层中断层的特征、发育规律及形成机制进行了分析。