煤矿安全2019，Vol.50Issue(1)：21-24,4.DOI:10.13347/j.cnki.mkaq.2019.01.006
低渗透煤的孔隙结构特征及其瓦斯吸附特性
Pore Structure and Gas Adsorption Characteristics of Coal with Low Permeability
张春旺 1李绍泉1
作者信息
- 1. 贵州大学 矿业学院,贵州 贵阳 550025
- 折叠
摘要
Abstract
In this paper, mercury intrusion experiment and high pressure isotherm adsorption experiment were used to analyze the pore structure characteristics and gas adsorption capacity of different metamorphic degrees of coal. Combined with industrial analysis data of coal samples, further investigate the effect of pore structure characteristics on coal seam gas permeability is carried out. The research shows that: the mercury porosities of the two kinds of coal samples show a trend of changing from high to low with the increase of coal ranks; the pore size distribution of Songhe No. 3 coal sample shows the single peak characteristic of the tiny pore size; the pore size distribution of Linhua No.9 coal sample shows the double peak scharacteristics of small pore diameter and medium and large pore diameters; the gas adsorption capacity of Songhe No. 3 coal measured by high pressure isotherm adsorption experiment is stronger than that of Linhua No.9 coal. The conclusion is that the pore characteristics, porosity and gas adsorption capacity of coal are affected by the degree of coal metamorphism, and the features of low metamorphic coal are outstanding.关键词
煤层瓦斯/压汞实验/等温吸附实验/煤的孔隙特征/瓦斯吸附Key words
coal seam gas/mercury intrusion experiment/isothermal adsorption experiment/coal pore characteristic/gas adsorption分类
矿业与冶金引用本文复制引用
张春旺,李绍泉..低渗透煤的孔隙结构特征及其瓦斯吸附特性[J].煤矿安全,2019,50(1):21-24,4.
