Abstract
In order to better discuss the influence of pore structure characteristics of primary coal on coalbed methane adsorption, suburban coal and Zhaozhuang coal in Henan Province were systematically sampled. The analysis method of pore structure characteristics of primary coal is divided into shooting research and experimental analysis. Scanning electron microscope (SEM) was used to analyze the formation reason of coal micropores, pore shape, pore connectivity, pore size, and filling effect on coalbed methane adsorption. Experimental analysis is mainly based on CO2 adsorption experiments to obtain specific surface, pore volume, and distribution of coal samples. The pore-specific surface area, pore volume, and adsorption-desorption curve of coal samples were obtained by ultralow-temperature N2 adsorption experiment. Finally, the influence of pore structure characteristics of primary tectonic coal on coalbed methane adsorption was discussed by fusion of phase study and experimental analysis.
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