摘要
针对井下高地温环境对煤自燃的影响,结合现有的理论知识与技术条件,对煤样进行恒温处理,利用煤自燃发火系统(程序升温色谱吸氧联用技术),测定30℃、40℃、50℃的高地温矿井条件下的CO、C2H4、C2H2等标志性气体产生情况,探究其产生规律以及特征温度的变化规律。通过对比常温煤样进行的试验结果,表明高温环境下煤体氧化产生气体的速率高于常温下氧化煤体,CO和C2H4气体随着处理温度的升高而速率升高,C2H2气体产生的起始温度明显随着温度的升高而降低,未经过处理的煤样产生C2H4的温度为270℃,而经50℃处理的煤样产生C2H4的温度为220℃,初步得出煤自燃危险性有所增加的结论。
In view of the influence of underground high temperature environment on coal spontaneous combustion, combined with the existing theoretical knowledge and technical conditions, the coal samples were treated with constant temperature, and the high temperature mine conditions of 30 ℃, 40 ℃ and 50 ℃ were simulated respectively. Then, the production of landmark gases such as Co, C2H4 and C2H2 under different ground temperature conditions was determined by using coal spontaneous combustion system(temperature programmed chromatography oxygen absorption combined technology), so as to explore the generation law and the change law of characteristic temperature. By comparing the test results of coal samples at room temperature, the results showed that the gas rate produced by coal oxidation in high temperature environment is higher than that under normal temperature. The rate of CO and C2H4 gas increases with the increase of treatment temperature, and the initial temperature of C2H2 gas decreases obviously with the increase of ground temperature. The temperature of acetylene produced by untreated coal sample is 270 ℃, while that of coal sample B treated at 50 ℃. It was concluded that the risk of coal spontaneous combustion is increased.
作者
李文福
宋战宏
马小辉
马搏滔
李洪杰
LI Wen-fu;SONG Zhan-hong;MA Xiao-hui;MA Bo-tao;LI Hong-jie(Binchang Mengcun Mining Co.,Ltd.,Changwu,Shaanxi,710065;Xuzhou Ji'an Mining Technology Co.,Ltd.,Xuzhou,Jiangsu,221116)
出处
《煤炭科技》
2020年第4期44-47,共4页
Coal Science & Technology Magazine
关键词
高地温
煤自燃
标志性气体
规律
high ground temperature
coal spontaneous combustion
landmark gas
law
