瓦斯的渗透力取决于瓦斯压力梯度，而瓦斯膨胀压力取决于瓦斯绝对压力。
The gas permeation power would be dependent on the gas pressure gradient and the gas expansion pressure would be dependent on the gas absolute pressure.
随着瓦斯压力的增加，突出煤样两端的瓦斯压力梯度增大率会逐渐减小，最终趋近于零。
The increasing rates of pressure gradient of two sides of outburst coal decrease with the increase of gas pressure and reach to zero at last.
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。
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。
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.
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