含瓦斯煤的吸附量与孔隙率及变形的映射规律研究  

Study on the mapping law of adsorption, porosity and deformation of gas bearing coal

作　　者：程波[1,2] 颜文学 孙炳兴 刘辉[1,2] CHENG Bo;YAN Wenxue;SUN Bingxing;LIU Hui(State Key Laboratory of Gas Disaster Monitoring and Emergency Technology,Chongqing 400037,China;China Coal Technology and Engineering Group Chongqing Research Institute,Chongqing 400037,China)

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：《煤矿安全》2021年第1期25-29,共5页Safety in Coal Mines

基　　金：国家自然科学基金面上资助项目(51774319)。

摘　　要：为厘清含瓦斯煤的吸附量与孔隙率及变形的映射规律,以高压容量法测试煤吸附瓦斯等温曲线的过程为条件,针对煤样在不同瓦斯压力的作用下,吸附量对煤孔隙率、变形的影响进行了理论分析;利用工业CT技术与高压容量法相结合的方法,研究含瓦斯煤的吸附量与孔隙率、变形的映射规律。结果表明:随着吸附瓦斯量的增加,煤的孔隙率逐渐降低,并趋于稳定值;煤的变质程度越高,其孔隙率演化的趋势越缓;煤的体积应变呈现近似于线性增长的特征。In order to clarify the mapping law of adsorption capacity, porosity and deformation of gas bearing coal, the influence of adsorption amount on porosity and deformation of coal sample under different gas pressures was analyzed theoretically based on the process of testing isothermal curve of coal adsorbing gas by high pressure volumetric method;the adsorption capacity of gas bearing coal was studied by combining industrial CT technology and high pressure capacity method. The results show that with the increase of adsorbed gas, the porosity of coal gradually decreases and tends to a stable value;the higher the coal metamorphism degree is, the slower the porosity evolution trend is;the volume strain of coal presents approximate linear growth.

关 键 词：瓦斯吸附 孔隙率 变形 瓦斯含量 映射规律 

分 类 号：TD713[矿业工程—矿井通风与安全]