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为了完善贵州区内突出煤的孔隙结构和吸附特性等物理特性,基于煤的孔隙结构和吸附特性对于瓦斯(煤层气)抽采与防治煤与瓦斯突出的重要性,采用相关仪器测定了贵州突出煤的孔隙结构和吸附特性,并分析了实验结果。结果表明:突出煤样平行层理表面均存在一定数量的晶体物质和微孔;突出煤样垂直节理表面可见一道或几道平行或交叉的且大小不一的裂隙;突出煤样的孔隙或裂隙孔径大部分在0~10 nm之间,孔径为3~5 nm的微孔在煤样中最为丰富,为瓦斯(煤层气)主要吸附空间;当相对压力达到0.8左右时,瓦斯吸附量会急剧上升;突出煤样瓦斯吸附量存在较大差异,孔容大的吸附量大。
In order to improve the physical properties such as pore structure and adsorption characteristics of prominent coal in Guizhou area, based on the importance of the pore structure and adsorption characteristics of coal for gas (CBM) extraction and prevention of coal and gas outburst, Pore structure and adsorption characteristics of coal, and analyzed the experimental results. The results show that there are a certain number of crystal materials and micropores on the surface of the parallel coal beds with prominent coal samples. One or more parallel or intersecting fractures with different sizes can be seen on the surface of the vertical coal samples; The pore size is mostly between 0 and 10 nm, and the pore size of 3 to 5 nm is the most abundant in the coal sample, which is the main adsorption space for methane (CBM). When the relative pressure reaches about 0.8, the adsorption capacity of gas will be sharp Rise; prominent coal gas adsorption capacity there is a big difference, large pore volume adsorption capacity.