瓦斯气体在煤孔隙中的扩散模式

Diffusion Mode of Methane Gas in Coal Pores

根据气体在多孔介质中的扩散模式，结合煤结构的实际特点，分析了瓦斯气体在煤孔隙中的扩散机理，得出瓦斯在煤体中有以下几种扩散模式：菲克型扩散、诺森扩散、过渡扩散、表面扩散和晶体扩散，并分析了煤层中影响瓦斯扩散的因素和各种扩散模式的适用条件。

Analysis is made on the diffusion mechanism of gas in coal pores according to the diffusion modes of gas in porous medium and the actual characters of coal structure, several diffusion modes are obtained including Ferction diffusion, Norseng diffusion, transition diffusion, surface diffusion and crystal diffusion, and analysis is also conducted on the factors affecting gas diffusion in coal seams and the applicable conditions of various diffusion modes.