负压环境下含瓦斯煤扩散特性试验研究  

Experiment study on diffusion features of gassy coal under negative pressure environment

作　　者：陈向军[1,2,3] 段正鹏 刘洋 王鹏 

机构地区：[1]河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地,河南焦作454000 [2]煤炭安全生产河南省协同创新中心,河南焦作454000 [3]煤矿灾害预防与抢险救灾教育部工程研究中心,河南焦作454000

出　　处：《煤炭科学技术》2016年第6期106-110,133,共6页Coal Science and Technology

基　　金：国家自然科学基金资助项目(51204065);河南理工大学博士基金资助项目(72103/001/002);河南理工大学青年骨干教师资助项目(72105/149)

摘　　要：为了揭示含瓦斯煤在负压环境下的扩散特性,在实验室分别模拟了0、10、20、30、40 k Pa负压环境下含瓦斯煤的扩散解吸过程,对比分析了不同负压环境下的瓦斯解吸量、解吸速度、扩散率和扩散系数的变化情况。试验结果表明:瓦斯解吸量随环境负压的增加逐渐增大,360 min时累计解吸量最大增加37.45%,负压具有促进煤中瓦斯解吸的作用;负压对前15 min内瓦斯解吸速度的影响比较显著,尤其对前3 min内瓦斯解吸速度影响最大,衰减高达60%左右,15 min后负压对解吸速度的影响较弱;吸附平衡压力相同条件下,瓦斯扩散率、扩散系数均随着负压的增大而增大;负压增大引起扩散系数的增大是促进瓦斯解吸的主要原因。In order to reveal the diffusion features of the gassy coal in the negative pressure environment,the diffusion and desorption processes of the gassy coal were simulated under the negative pressure environment of 0,10,20,30 and 40 k Pa in the lab and a comparison analysis was conducted on the gas desorption volume,desorption rate,diffusion rate and diffusion coefficient under different negative pressure environment. The results showed that the gas desorption volume would be steadily increased with the environment pressure increased,the accumulated desorption volume within 360 minutes would be increased by 37. 45% in max and the negative pressure would have a role to promote the gas desorption of the coal. Before the first 15 minutes,the negative pressure would have obvious influences to the gas desorption rate,especially would have a max influence to the gas desorption rate within the first three minutes,the attenuation was about 60% and after the first15 minutes,the negative pressure would have less influences to the desorption rate. Under the same condition of desorption balanced pressure,the gas diffusion coefficient and the diffusion coefficient would all be increased with the negative pressure increased. The negative pressure increased would cause the diffusion coefficient increased and would be the main factor to promote the gas desorption.

关 键 词：负压环境 解吸速度 扩散率 扩散系数 

分 类 号：TD712[矿业工程—矿井通风与安全]