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一、绪 言 煤层内的瓦斯流动,一般认为有如下两个过程。即构成煤层的块煤中的吸附瓦斯解吸到煤层裂隙中去为第一过程;该煤层裂隙内的游离瓦斯在流向工作面或者钻孔时为第二过程。 第一过程据山崎·Bielicki等认为,可以将其看作是遵循菲克(Fick)定律的扩散现象;而Airy也在对此进行考察,其认为即是微小块煤中,达西(Darcy)定律也是成立的。至于第二过程,一般都是用达西定律来加以处理的。
First, the introduction of coal seam gas flow, generally considered the following two processes. That is, the adsorbed gas in the lump coal that constitutes the coal seam desorbs into the coal seam fissure for the first process; the free gas in the coal seam fissure is the second process when flowing to the working face or drilling. The first, according to Yamazaki Bielicki et al., Considers it to be a diffusion that follows Fick’s law; and Airy is also examining this as the tiny piece of coal, Darcy, The law is also established. As for the second process, Darcy’s law is generally used to deal with it.