摘要
为了准确地掌握煤的自然发火进程,采用程序升温及煤氧化过程的热重实验,确定出同发矿井5号煤层自然发火指标气体及临界值,该煤层首选CO、C2H6气体作为主要指标气体,并以C2H4、C3H8、C2H2和C2H4/C2H6、C3H8/C2H6作为辅助指标。在CO、C2H6气体浓度出现为缓慢氧化阶段;在CO、C2H6气体浓度明显增大,伴随C2H4气体出现,进入快速氧化阶段;C2H2气体出现,进入剧烈氧化阶段。实验结果在8200工作面应用,结果表明,该工作面在回采期间处于缓慢氧化阶段,在撤退期间处于快速氧化阶段。
In order to accurately grasp the natural combustion process of coal,the thermogravimetric experiments of temperature-programming and coal oxidation process were used to determine the natural ignition index gas and critical value of No.5 coal seam in Tongfa Mine.The coal seam preferred CO and C2H6 gas as the main indicator gas,and C2H4,C3H8,C2H2 and C2H4/C2H6,C3H8/C2H6 as auxiliary indicators.The concentration of CO and C2H6 appeared as a slow oxidation phase,the concentration of CO and C2H6 gas increased significantly,and the C2H4 appeared in the rapid oxidation stage,C2H2 appeared and entered the intense oxidation stage.The experimental results were applied at 8200 working face.The results showed that the working face was in the slow oxidation stage during the recovery and in the rapid oxidation stage during the retreat.
作者
潘凤龙
Pan Fenglong(Tongfa Dongzhouyao Coal Industry Corporation Ltd.,Datong Mining Group,Datong 037101,China)
出处
《煤炭与化工》
CAS
2019年第8期107-109,114,共4页
Coal and Chemical Industry
关键词
自然发火
指标气体
程序升温
热重实验
临界值
spontaneous combustion
index gas
temperature programming
thermogravimetric experiment
critical value
