水分对煤中瓦斯的置换作用实验研究  

Experimental Study on Replacement Effect of Water to Gas in Coal

作　　者：樊亚庆 王兆丰[1,2] 陈金生 李皓伟[1] FAN Yaqing;WANG Zhaofeng;CHEN Jinsheng;LI Haowei(School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China;Key Laboratory of Gas Geology ＆ Gas Control, Jiaozuo 454003, China)

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003 [2]瓦斯地质与瓦斯治理重点实验培育基地,河南焦作454003

出　　处：《煤矿安全》2017年第12期25-27,32,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51274090)

摘　　要：为了研究水分对煤中瓦斯的置换作用,搭建实验平台,保证实验系统压力恒定,实验研究了不同含水率、不同吸附平衡压力下水分对煤中瓦斯的置换作用。实验结果表明:相同吸附平衡压力下,置换量、置换率随着时间的延长逐渐增大,但增加的幅度不断减小,最大置换量、最大置换率与含水率、吸附平衡压力正相关;相同含水率下,1.5 MPa较2.5 MPa下的最大置换量小,但两者的最大置换率相差不大;置换速度经历了快速增加、缓慢持久、衰减至0这3个阶段。In order to study the replacement effect of water to gas in coal,setting up the experimental platform,under the constant pressure of the experimental system,under different water contents and different adsorption equilibrium pressures,the experiment was studied.Results show that under the same adsorption equilibrium pressure,the replacement amount and the replacement rate increase with the extension of time,but the range is in constant decrease.The maximum amount and the maximum rate of replacement are positively correlated with the water content and the adsorption equilibrium pressure;under the same water content,the maximum amount of 1.5 MPa is smaller than that under 2.5 MPa,but the maximum rates of the two have little difference;the speed of replacement experiences three stages,including a rapid increase,slow lasting,decay to zero.

关 键 词：水分 含水率 吸附平衡压力 煤中瓦斯 置换作用 

分 类 号：TD713[矿业工程—矿井通风与安全]