coal measure gas 煤系气
And Darcy flow production equation with gas-bearing volume may reflect the characteristics of methane migration in coal measure strata more really.
把含气量引入达西流产量公式也许能更真实地反映甲烷气体在煤储层中流动产出的特征。
It is considered that the gas pre-extraction measure in coal bed is one of the most effective methods to prevent the gas disaster.
目前，本煤层瓦斯预抽放措施仍然被认为是预防瓦斯灾害最有效的方法之一。
Fast speed and great changes are the characteristics of the initial desorption gas course from coal, so it is difficult to measure the initial desorption gas flow from coal sample.
煤样中瓦斯的初始解吸过程的特点是速度快、变化大，初始解吸的瓦斯流量难以检测。
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