Chongqing Industry Polytechnic College
CCTEG Chongqing Research Institute
College of Safety Science and Engineering,Liaoning Technical University

为了研究水分对煤体吸附/解吸CH4特性的影响,利用煤层瓦斯吸附解吸变形动态测试装置,开展了含水率为0、0.83%、1.52%、2.68%条件下块煤吸附/解吸CH4试验。研究结果表明:水分对煤体吸附/解吸CH4影响显著,水分有助于煤体解吸CH4,但抑制煤体吸附CH4;煤的饱和吸附量a值与饱和解吸量A值基本相等,且与含水率无关;煤的吸附常数b值、解吸常数B值随煤体含水率的增高均呈现指数下降趋势,并最终趋近于0;以Langmuir形式方程为基础,结合吸附/解吸常数与含水率的函数关系,构建了含水率影响条件下的CH4吸附/解吸数学模型,并通过试验数据对该模型的可靠性进行了验证;吸附解吸差异性系数随含水率的增高呈指数衰减的变化趋势。

In order to study the influence of water on coal adsorption / desorption of CH ,a dynamic test device for coal seam gas adsorption and desorption deformation was used to carry out the CH adsorption/ desorption tests of lump coal with moisture content of 0,0. 83%,1. 52% and 2. 68%. The results show that water has a significant effect on the adsorption/ desorption of CH by coal. Water helps the desorption of CH by coal,but inhibits the adsorption of CH by coal. The value of the saturation adsorption a and saturation desorption A are basically equal,and has no relationship with moisture content. The value of adsorption constant b and desorption constant B shows an exponential decreasing trend with the increase of moisture content in coal,and finally approaches 0. Based on the Langmuir equation form and functional relationship between the adsorption/ desorption constants and moisture content,the CH adsorption/ desorption mathematical models under the influence of moisture content were constructed,and were verified using experimental data. The difference coefficient of adsorption and desorption showed an exponential decay trend with the increase of moisture content.

重庆市教委科学技术研究项目(KJQN202203201);重庆市自然科学基金项目(cstc2021jcyj-msxmX0959,cstc2021jcyj-msxmX0564);贵州省科技计划项目(黔科合支撑[2023]一般482);重庆工业职业技术学院博士科研基金资助项目(2023GZYBSZK1-11)

郭平,刘延保,张遵国.块煤含水率对CH4吸附/解吸特性影响试验研究[J].矿业安全与环保,2025,52(1):70-75.

GUO Ping,LIU Yanbao,ZHANG Zunguo. Research on the influence of moisture content of lump coal on coal adsorption/ desorption characteristics of CH4 [J]. Mining Safety & Environmental Protection,2025,52(1):70-75.