黑龙江科技大学学报2024，Vol.34Issue(2)：201-206,6.DOI:10.3969/j.issn.2095-7262.2024.02.006
变质程度对煤中瓦斯扩散规律的影响
Influence of metamorphic degree on gas diffusion law in coal
摘要
Abstract
This paper aims to investigate the effect of adsorption-desorption characteristics and diffu-sion law of gas on the production of coalbed gas and mining difficulty.The study works by conducting an adsorption and desorption experiment of high-pressure gas to study the diffusion law behind gas in coal in-fluenced by metamorphism.The results show that with the severe metamorphism of the coal,the increase of macromolecular structures enlarges the adsorption space and accelerates the adsorption process,resul-ting in the enhancement of adsorption capacity;and the small molecular substances in coal that inhibit adsorption and desorption become less,resulting in large amount of gas generating desorption and the de-sorption capacity enhanced.Compared with the coal with the higher metamorphic degree coal,the inert group and chitin group in low metamorphic degree coal can provide more large pores,and thus enlarge the diffusion space.In addition,the higher content of open cell pores in the inert group of low metamor-phic degree coal,can accelerate the diffusion rate,weaken the gas diffusion capacity with the increase of metamorphic degree.关键词
瓦斯扩散/变质程度/吸附解吸Key words
gas diffusion/metamorphic degree/adsorption and desorption分类
矿业与冶金引用本文复制引用
刘志军,王震..变质程度对煤中瓦斯扩散规律的影响[J].黑龙江科技大学学报,2024,34(2):201-206,6.基金项目
黑龙江省自然科学基金项目(LH2021E108) （LH2021E108）
