煤自燃氧化升温过程特性参数及标志气体研究

为了预防任楼煤矿52煤层自然发火,做好煤自燃发展程度的前期预测,准确预报工作,采用煤自燃程序升温试验,测试分析了52煤层煤样的耗氧速率、CO、CO₂和CH₄产生率等特性参数变化规律,以及CO、CH₄、C₂H₆、C₂H₄等气体随煤温变化规律,确定了煤自燃标志气体。结果表明:52煤层煤样耗氧速率、CO、CO₂和CH₄产生率均随煤温升高呈不断增大趋势;CO、C₂H₄可以作为煤自燃标志性气体;52煤层煤样的临界温度范围为60~70℃,干裂温度范围为110~120℃。研究成果对建立煤自燃早期预测预报,并采取有效的防灭火措施具有指导作用。

Study on characteristic parameters and mark gases of coal spontaneous combustion oxidation heating process

In order to prevent spontaneous combustion of 52 coal seam in Renlou coal mine and do a good job in the early prediction of the development degree of coal spontaneous combustion,by using the temperature programmed test of coal spontaneous combustion,the change law of characteristic parameters of 52 coal seam,such as oxygen consumption rate,CO,CO₂and CH₄generation rate was tested,the variation law of CO,CH₄,C₂H₆and C₂H₄with coal temperature was analyzed,and the mark gases of coal spontaneous combustion were determined.The results show that the oxygen consumption rate,CO,CO₂and CH₄production rate of coal sample in 52 coal seam are raise with the increase of coal temperature,so CO and C 2H 4 can be used as the mark gases of coal spontaneous combustion;the critical temperature of 52 coal seam is 60~70℃,and the drying temperature is 110~120℃.The research results have a guiding role in establishing the early prediction system of coal spontaneous combustion and taking effective fire prevention and extinguishing measures.