气煤自燃特征参数规律研究  

Study on Characteristic Parameters Laws of Gas Coal Spontaneous Combustion

作　　者：朱红青[1,2] 赵鸿儒[1,2] 李珂 王晓宽 李世祥 ZHU Hongqing;ZHAO Hongru;LI Ke;WANG Xiaokuan;LI Shixiang(College of Resources and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China;Mate Key Laboratory of Coal Resources and Safe Mining,China Unirersity of Mining and Technology (Beijing),Beijing 100083, China)

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京100083

出　　处：《煤矿安全》2019年第2期19-24,29,共7页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(5177041642)

摘　　要：为揭示气煤自燃特征参数规律,通过煤自燃标志性气体测定系统,测定气煤自燃标志性气体产生规律,对气煤自燃特征参数进行深度分析,得出了气煤自燃特征参数规律。结果表明:CO/CO_2的比值规律性良好,能反映气煤自燃的趋势;保德气煤的临界温度为42℃,干裂温度为101℃;CO产生率先缓慢增加后急剧增加,温度拐点为100℃;CO_2产生率随煤温升高而增大;CH4产生率随煤温升高先增大后减小,极值点煤温为130℃;煤温100℃前,耗氧速率线性缓慢增加,超过100℃,耗氧速率迅速增加;最大与最小放热强度随煤温升高而增大。基于以上研究,确立了气煤自燃特征参数规律,为科学有效地预防气煤自燃提供了理论依据。To reveal the characteristic parameters laws of gas coal spontaneous combustion, the test system for spontaneous index gases was established to deeply analyze the characteristic parameters laws of gas coal spontaneous combustion. The results show that the laws of CO/CO2 can reflect the trend of gas coal spontaneous combustion. The critical temperature of Baode gas coal is 42℃, and the cracking temperature is 101 ℃. The production rate of CO increases slowly then increases sharply and the temperature turning point is 100 ℃. The production rate of CO2 increases with coal temperature. The production rate of CH4 increases firstly then decreases with the increase of coal temperature and the extreme point coal temperature is 130 ℃. The oxygen consumption rate increases slowly before 100 ℃, then increases rapidly when the coal temperature is higher than 100 ℃. In addition, the maximum and minimum exothermic strength increase with the increasing of coal temperature. Based on the above studies, the characteristic parameters laws of gas coal spontaneous combustion were obtained, and it provides a theoretical basis for scientific and effective prevention of gas coal spontaneous combustion.

关 键 词：气煤 煤自燃 标志性气体 耗氧速率 特征温度 矿井火灾 

分 类 号：TD752.2[矿业工程—矿井通风与安全]