煤矿安全2024，Vol.55Issue(5)：61-67,7.DOI:10.13347/j.cnki.mkaq.20230917
含瓦斯型煤多级降压解吸规律研究
Study on multi-stage pressure reduction desorption law of gas-bearing briquette coal
摘要
Abstract
The change of external environmental pressure is one of the main factors affecting the gas desorption pattern of coal samples.In order to study the difference of gas desorption under atmospheric pressure and step-down pressure,we conducted the ex-periments of atmospheric pressure desorption and step-down pressure desorption on coal samples under different adsorption equilib-rium pressures by using the self-developed gas-bearing coal desorption system,to compare and analyze their desorption characterist-ics and summarize the applicability of different empirical formulas to the desorption data.The results show that:the gas desorption volume in both desorption environments shows a"rapid rise-slowing down-stabilizing"with time;in the process of step-down desorption,the gas desorption volume in the same desorption time increases as the desorption pressure decreases,and the desorption takes longer time to reach the equilibrium state.In the process of stepwise desorption,the amount of gas desorbed in the same de-sorption time increases with the decrease of desorption pressure,and the time required for desorption to reach the equilibrium state becomes longer,and the accumulated gas desorption volume at different adsorption equilibrium pressures is negatively correlated with the desorption pressure.关键词
瓦斯解吸/带压解吸/常压解吸/型煤/多级降压Key words
gas desorption/desorption under pressure/atmospheric pressure desorption/briquette coal/multi-stage pressure reduction分类
矿业与冶金引用本文复制引用
贾宏哲,王兆丰,孙永鑫,岳基伟..含瓦斯型煤多级降压解吸规律研究[J].煤矿安全,2024,55(5):61-67,7.基金项目
国家自然科学基金资助项目(52074107) （52074107）
