煤炭自燃生成标志气体的红外光谱分析

针对煤自燃氧化过程中生成的生产物能够判断煤自燃的反应过程和机理以及在不同温度下生成的标志性气体可以判断煤自燃的严重程度的问题，采用红外光谱手段对神东矿区6个煤矿不同层位和不同工作面的12个煤样进行了研究。研究结果表明，煤氧化燃烧过程是分阶段进行的，分为失水阶段、氧化阶段、着火燃烧阶段。各阶段的标志气体不一样：失水阶段以H2O吸收峰为主、氧化阶段C2H4、CH4出现显现峰、着火燃烧阶段出现C2H4、CH4强峰。确定煤样在不同温度下生成标志气体的规律，对预测煤的自燃发火具有重要的理论和实际意义。

Analysis on infrared spectrum study of significant gas produced by coal spontaneous combustion

In view of the fact that the products of coal spontaneous combustion could obtain the action process and mechanism for coal spontaneous combustion,twelve pieces of coal samples at different layers and workfaces in six coal minings of Shendong mining area were analyzed by infrared spectrum.The results show that the process was composed of several phases,such as evaporated phase,oxidated phase and combustion phase.The significant gas of each phase were different: the H2O absorption peak is primary at evaporated phase,the C2H4 and CH4 absorption peak isappearing at oxidated phase and the C2H4 and CH4 absorption peak is strong at combustion phase.The rules for the significant gas produced by coal samples were obtained at different temperature.And it has important theoretical and practicality significance for forecasting coal spontaneous combustion.