Mechanism of microscopic behind the influence of stress loading on gas adsorption by coal

被引：0
作者：
Wen, Zhihui [1 ,2 ,3 ]
Guo, Shuqian [3 ]
Zhao, Yanxia [4 ]
Wang, Yanping [3 ]
Jia, Ran [3 ]
Ren, Jiangang [5 ]
机构：
[1] Henan Polytech Univ, State Key Lab Cultivat Base Gas Geol & Gas Control, Jiaozuo 454000, Peoples R China
[2] State Collaborat Innovat Ctr Coal Work Safety & Cl, Jiaozuo 454000, Peoples R China
[3] Henan Polytech Univ, Coll Safety Sci & Engn, Jiaozuo 454000, Peoples R China
[4] Henan Polytech Univ, Sch Math & Informat Sci, Jiaozuo 454000, Peoples R China
[5] Henan Univ Engn, Coll Environm & Bioengn, Zhengzhou 451191, Peoples R China
来源：
SCIENTIFIC REPORTS | 2025年 / 15卷 / 01期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Gas adsorption; Thermodynamic analysis; Isothermal adsorption experiments; Molecular dynamics; TEMPERATURE; EQUATION; METHANE;
D O I：
10.1038/s41598-025-87477-8
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
This study aims to explore the mechanism behind the influence of stress on gas adsorption by coal during deep mining and improve the accuracy of gas disaster prevention and control. To achieve this aim, thermodynamic analysis was conducted on the process of gas adsorption by loaded coal, and modified thermodynamic model proposed by previous scholars. It is found that stress plays an important role in gas adsorption by coal. In addition, isothermal adsorption experiments were performed on coal samples under different stress states with the aid of a coal rock triaxial adsorption and desorption experimental device. Based on the experimental results, the variations in adsorption capacities of coal samples under different stress loads were obtained. Finally, molecular dynamics simulation of gas adsorption was conducted by taking lignite as the research object. The microscopic mechanism of gas adsorption by loaded coal is elucidated from the perspectives of isothermal adsorption parameters of the loaded coal, isothermal heat of adsorption, and the changing law of the probability density distribution of adsorbed gas molecules. The research findings are anticipated to offer theoretical and practical guidance for the prevention and control of gas disasters in deep coal mines and the extraction of coalbed methane.
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页数：13
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