一、前言赋存在煤层内的瓦斯,一但卸压后就会涌出。为了弄清开采煤层或掘进巷道周围破碎带瓦斯涌出的现象,以及明确瓦斯吸附、解吸的特性,因此,知道裂隙内瓦斯流动机理极其重要。本文作者将粒度一致的粉煤压缩成圆柱型煤样,进行瓦斯渗透试验。测定了成型煤样孔隙率及渗透率随着载荷和煤粒大小的不同 I. Introduction Presence of gas inside the coal seam, once released, will gush out. In order to understand the phenomenon of gas emission from broken coal bed or the surrounding rock roadway and the characteristics of gas adsorption and desorption, it is extremely important to know the gas flow mechanism in the fracture. The author of this paper will be the same size compressed coal into cylindrical coal samples for gas permeation test. The porosity and permeability of shaped coal sample were measured with the different load and coal particle size