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瓦斯压力梯度
相关语句
  gas pressure gradient
     The mechanism of coal-gas outburst iniration is comprehensively analysed. The direct courses of initating coal-gas outburst are the sudden loss of confining stresses and the gas pressure gradient in coal seam.
     综合分析了激发煤与瓦斯突出的力学机理,认为煤体所受约束应力的突然解除以及煤层中的瓦斯压力梯度是激发突出的主要原因。
短句来源
     When the gas pressure gradient between airway surface and the first node away from the wall surface in coal seam is used to calculate the gas emission rate,significant error may occur.
     用煤壁处节点与煤层内相邻节点间的瓦斯压力梯度来求煤壁瓦斯涌出量的方法误差较大。
短句来源
     The way to determine the suitable time and space interval is put forward by investigating the variation of gas pressure gradient on wall with several time and space intervals.
     通过考察选取不同时间步长和空间步长时煤壁瓦斯压力梯度的变化,提出了选取合适的时间步长和空间步长的方法。
短句来源
  相似匹配句对
     Computation of Coal Seam Gas Pressure
     煤层瓦斯压力计算
短句来源
     pressure;
     压力;
短句来源
     The Influence of In-situ Stress Gradient and Geothermal Temperature on The Calculation of Coalbed Gas Pressure
     煤层温度和应力梯度变化对煤层瓦斯压力计算的影响
短句来源
     Study and Application Pressure Gradient Distribution Chart
     压力梯度分布图的研究及应用
短句来源
     2. residual gas pressure;
     2.残余瓦斯压力问题;
短句来源
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  gas pressure gradient
Making reasonable assumptions, it was possible to infer the magnitude of the gas pressure gradient from the flare core into the surge by using the EUV intensity gradient.
      
The solutions show the interplay between the gravitational force, the J × B force (B, magnetic field induction) and the gas pressure gradient.
      
The solutions illustrate the contribution of the anisotropic J × B force (B, magnetic field induction), the gravitational force, and gas pressure gradient to the force balance.
      
The solutions illustrate the contribution of the anisotropic J × B force (B, magnetic field induction), the gravitational force, and the gas pressure gradient to the force balance.
      


The mechanism of coal-gas outburst iniration is comprehensively analysed. The direct courses of initating coal-gas outburst are the sudden loss of confining stresses and the gas pressure gradient in coal seam. The effects of working face's advancing rate, geological conditions and gas pressure gradient as well as mechanical & physical characteristics of coal on outburst initation are expounded by means of mathematic analyses about gas seepage which takes place in coal seams. The results are of certain practical...

The mechanism of coal-gas outburst iniration is comprehensively analysed. The direct courses of initating coal-gas outburst are the sudden loss of confining stresses and the gas pressure gradient in coal seam. The effects of working face's advancing rate, geological conditions and gas pressure gradient as well as mechanical & physical characteristics of coal on outburst initation are expounded by means of mathematic analyses about gas seepage which takes place in coal seams. The results are of certain practical significance and reference value to further quantitive study of outburst and its predication.

综合分析了激发煤与瓦斯突出的力学机理,认为煤体所受约束应力的突然解除以及煤层中的瓦斯压力梯度是激发突出的主要原因。通过对煤层瓦斯渗流的数学分析,说明了工作面的推进速率、煤层瓦斯压力、煤的物理力学性质以及地质条件等因素对激发突出所产生的影响。

The method for proper determination of the time step and space interval is studied.Calculation of the gas emission rate according to gas pressure distribution is analyzed when finite difference method is applied to simulate the gas flow in coal seams.When the gas pressure gradient between airway surface and the first node away from the wall surface in coal seam is used to calculate the gas emission rate,significant error may occur.It is suggested that gas pressure gradient on airway surface should be determined...

The method for proper determination of the time step and space interval is studied.Calculation of the gas emission rate according to gas pressure distribution is analyzed when finite difference method is applied to simulate the gas flow in coal seams.When the gas pressure gradient between airway surface and the first node away from the wall surface in coal seam is used to calculate the gas emission rate,significant error may occur.It is suggested that gas pressure gradient on airway surface should be determined from the fitted gas pressure distribution curve in coal seam.It is more reliable and accurate to calculate the gas emission rate according to gas pressure gradient obtained from the fitted gas pressure distribution curve.The way to determine the suitable time and space interval is put forward by investigating the variation of gas pressure gradient on wall with several time and space intervals.

对应用有限差分法解算煤层瓦斯流动时,如何选取合适的时间步长和空间步长、如何根据煤层瓦斯压力分布计算煤壁瓦斯涌出量等问题进行了分析和探讨。用煤壁处节点与煤层内相邻节点间的瓦斯压力梯度来求煤壁瓦斯涌出量的方法误差较大。根据煤层内各节点的瓦斯压力值对瓦斯压力进行拟合,用拟合曲线在煤壁处的斜率作为煤壁瓦斯压力梯度计算瓦斯涌出量,能得到可靠精确的结果。通过考察选取不同时间步长和空间步长时煤壁瓦斯压力梯度的变化,提出了选取合适的时间步长和空间步长的方法。

 
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