煤体吸附解吸瓦斯规律及细观特征研究  

Study on Laws of Coal Adsorbing and Desorbing Gas and Microcosmic Characteristics

作　　者：王磊[1] 杨栋[1] 燕俊鑫 康志勤[1] 

机构地区：[1]太原理工大学采矿工艺研究所,山西太原030024

出　　处：《煤矿安全》2017年第6期1-4,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(U1261102);山西省研究生教育创新资助项目(2016SY013)

摘　　要：煤体对瓦斯的吸附解吸特征对防止瓦斯事故以及煤层气抽采技术都具有重要的意义。对不同温度下的煤体吸附解吸规律做了量化研究,同时从细观角度对实验后的煤样做了渗透性分析,得到如下结论:煤体吸附和解吸瓦斯的过程均可分为3个不同的阶段,解吸率与温度呈对数关系变化;从20℃变化到80℃,孔隙率呈现先增后减的趋势;从煤体解吸率和渗透性的角度综合分析,认为60℃是煤体吸附解吸瓦斯的最佳温度。The characteristics of coal adsorbing and desorbing gas have important significance to prevent gas accidents and coal seam gas drainage technology. In this paper, the adsorption and desorption of coal at different temperature was studied quantitatively, and the permeability of coal sample was analyzed from microscopic view. The conclusions are as follows： the process of coal adsorbing and desorbing gas can be divided into three different stages, moreover, the desorption rate and temperature shows a logarithmic relationship; from 20℃ to 80℃, the porosity shows the trend of first increasing and then decreasing. The 60 ℃ is the best temperature of coal adsorbing and desorbing gas from the aspects of coal body desorption rate and permeability.

关 键 词：瓦斯吸附解吸 解吸率 细观分析 渗透性 CT扫描 临界温度 

分 类 号：TD712[矿业工程—矿井通风与安全]