注热条件下含瓦斯煤体吸附及渗透率模型分析  

Analysis on Coal Gas Adsorption and Permeability Model under Heat Injection Condition

作　　者：贾泉敏[1,2] 孙海涛[1,2] 江万刚[1,2] 郭恒[1,2] 

机构地区：[1]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [2]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《矿业安全与环保》2015年第1期73-75,79,共4页Mining Safety & Environmental Protection

基　　金：中国煤炭科工集团科技创新基金资助项目(2013QN004);重庆市自然科学基金资助项目(cstc2012jj A90002;cstc2012jj A90003);中煤科工集团重庆研究院有限公司自立项目(2014YBXM55)

摘　　要：为了分析煤层注热对煤体瓦斯产出的影响效应,需要对注热条件下煤体瓦斯吸附、解吸规律和煤体渗透率变化规律进行研究。基于Langmuir吸附模型和Warren-Root几何模型等假设条件,结合弹性力学和渗流力学理论,建立了煤体瓦斯吸附及渗透模型并对其进行了分析,最终得出在注热条件下,温度和水分对煤体瓦斯吸附和渗透率的影响规律,为煤层注热多场耦合模型的分析求解奠定了基础。In this paper,study was carried out on the adsorption and desorption laws of coal gas and the change laws of coal permeability under the condition of heat injection in order to analyze the influence of heat injection in coal seam on the coal gas output. Based on the assumptions of Langmuir model and Warren-Root geometric model and by combining the elasticity mechanics with the fluid mechanics,the coal gas adsorption model and coal permeability model were established and then analyzed. Finally,the influence of temperature and moisture on the gas adsorption and permeability of coal was obtained under the condition of heat injection,this thus laid the foundation for the analysis and solution of the coal seam heat injection multi-physics coupling model.

关 键 词：煤体 注热 吸附 渗透率 多场耦合 

分 类 号：TD712[矿业工程—矿井通风与安全]