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介绍了煤岩组分在低温氧化阶段产出的氧化分解气体浓度变化和低温氧化的难易程度，指出应用标志气体预测预报自燃发火时，煤岩组分的影响决不可忽视，煤矿应采用本矿有代表性的煤样做模拟实验，求得标志气体的浓度与煤温的相关值作为本矿预测预报临界值的依据。
The changes of the concentrations of oxidative decomposition gases and the ease of low temperature oxidation produced during the low temperature oxidation stage are introduced. It is pointed out that the influence of coal and rock components can not be neglected when using the marker gas to predict spontaneous combustion, and the coal mine should use this Representative coal samples do simulation experiments, obtained the concentration of the flag gas and coal temperature as the basis for the forecast value of the mine base.