丰城矿区乐平组煤层CH_(4)和CO_(2)吸附特征及吸附模型研究  

Research on adsorption characteristics and adsorption model of CH_(4) and CO_(2) in Leping Formation coal seam of Fengcheng Mining Area

作　　者：肖富强 邹勇军 章双龙 祁星 肖卫东 XIAO Fuqiang;ZOU Yongjun;ZHANG Shuanglong;QI Xing;XIAO Weidong(Jiangxi Province Key Laboratory of Exploration and Development of Critical Mineral Resources,Nanchang 330001,China;Jiangxi Geological Survey and Exploration Institute,Nanchang 330001,China;Jiangxi Provincial Coal Geological Exploration and Research Institute,Nanchang 330001,China)

机构地区：[1]关键矿产资源勘查与开发江西省重点实验室,江西南昌330001 [2]江西省地质调查勘查院,江西南昌330001 [3]江西省煤田地质勘察研究院,江西南昌330001

出　　处：《煤矿安全》2025年第1期43-51,共9页Safety in Coal Mines

基　　金：江西省地质局科技研究资助项目(2024JXDZKJKY04);江西省级财政出资地质勘查资助项目(20240095);江西省地质局核与能源类资助项目(2023HYN06);江西省地质调查勘查院地质环境监测所科研资助项目(2022SDDYDHS01)。

摘　　要：煤体对气体的吸附特征决定了煤层的地质封存能力。对丰城矿区主力B4煤层进行了不同温度条件下的等温吸附实验,研究了煤层对气体的吸附特征,采用9种不同吸附数学模型对CO_(2)吸附实验数据进行拟合,检验不同模型的拟合效果。结果表明:丰城矿区B4煤层CH_(4)、CO_(2)等温吸附实验规律总体表现为压力正效应、温度负效应;煤层对CO_(2)的吸附能力明显高于对CH_(4)的吸附能力,二者最大吸附量的比值约为2.0;9种模型中,L模型、T模型、LF模型、EL模型的拟合效果最好,最适合表征煤层对CO_(2)的吸附特征。The gas adsorption characteristic of coal body determines the geological storage capacity of coal seam.Isothermal adsorption experiments were conducted in the main B4 coal seam in the mining area under different temperature conditions to study the gas adsorption characteristics of the coal seam.Nine different adsorption mathematical models were used to fit and analyze the CO_(2) adsorption experimental data,and the fitting effects of different models were tested.The results indicate that:the overall experimental pattern of CH_(4) and CO_(2) isothermal adsorption in B4 coal seam of Fengcheng Mining Area shows that the pressure is a positive effect and the temperature is a negative effect;the adsorption capacity of coal seams for CO_(2) is significantly stronger than that for CH_(4),and the ratio of the maximum adsorption capacity of the two is about 2.0;the L model,T model,LF model,and EL model have the best fitting effect and are most suitable for characterizing the adsorption characteristics of CO_(2) in coal seams.

关 键 词：CO_(2)地质封存 煤层气 等温吸附 吸附模型 碳中和 丰城矿区 

分 类 号：TD712[矿业工程—矿井通风与安全]