摘要
为探究粒径和温度耦合作用对煤中瓦斯解吸演化规律,以贵州六盘水矿区17号煤层为研究对象,借助HCA高压容量法瓦斯吸附装置,开展了不同粒径和温度条件下的瓦斯解吸试验。结果表明:温度不变时,煤中瓦斯解吸量和初始瓦斯解吸量与粒径成反相关关系,粒径抑制瓦斯解吸过程;粒径恒定时,煤中瓦斯解吸量随温度升高而增加,温度促进瓦斯解吸过程;利用改进巴雷尔式和解吸试验前30 min实测数据,推导得出煤中瓦斯解吸量随粒径和温度耦合作用的函数关系式;当粒径从0.1~0.3 mm增至0.75~1 mm范围,粒径和温度耦合作用均抑制煤中瓦斯解吸过程,瓦斯解吸量总体呈下降趋势,但其随粒径增大呈快速降低-缓慢降低的渐变趋势,而随温度变化规律各异。
In order to investigate the evolution law of the coupling effect of particle size and temperature on gas desorption in coal,the gas desorption test was carried out under different conditions of particle size and temperature by virtue of the HCA gas desorption device in No.17 coal seam of Liupanshui Mining Area in Guizhou Province.The results show that:when the temperature is constant,the gas desorption amount and initial gas desorption amount are inversely correlated with the particle size,and the particle size inhibits the gas desorption process.When the particle size is constant,the gas desorption amount in the coal increases with the increase of temperature,and the temperature promotes the gas desorption process.Based on the improved Barrel formula and the data measured from the first 30 minutes of the desorption test,the function relation of gas desorption in coal with the coupling action of particle size and temperature is deduced.When the particle size increases from 0.1-0.3 mm to 0.75-1 mm,the coupling effect of particle size and temperature inhibits the process of gas desorption in coal,and the gas desorption capacity shows a downward trend as a whole.But it has a trend of gradual change from rapid decrease to slow decrease as the particle size increases and the law varies with temperature.
作者
袁梅
王玉丽
李闯
许石青
张平
YUAN Mei;WANG Yuli;LI Chuang;XU Shiqing;ZHANG Ping(Mining College of Guizhou University,Guiyang 550025,China;Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources,Guiyang 550025,China;Guizhou Engineering Lab of Advantage Mineral Resources Efficient Utilization,Guiyang 550025,China;Engineering Center for Safe Mining Technology Under Complex Geologic Conditions,Guiyang 550025,China;Xingyi Normal University for Nationalities,Xingyi 562400,China)
出处
《煤矿安全》
CAS
北大核心
2019年第12期32-35,40,共5页
Safety in Coal Mines
基金
国家自然科学基金资助项目（51864009）
贵州大学引进人才资助项目（贵大人基合字（2015）30号、（2016）58号）
关键词
粒径
温度
耦合作用
瓦斯解吸
瓦斯灾害
particle size
temperature
coupling
gas desorption
gas disaster
