通过程序升温实验研究了煤炭的自燃特性,测定了不同粒度煤样在不同温度下产生CO,CO2等气体的浓度.讨论了指标气体的选择,分析了CO,CO2等气体浓度随温度的变化规律,得到了耗氧速度与煤温及煤体粒度的关系.结果表明,煤体粒度越小,温度越高,则煤氧复合的强度越大.本实验的研究结果对煤矿火灾的防治具有指导作用. The spontaneous combustion characteristics of coal were studied by temperature programmed experiment, and the concentrations of CO, CO2 and other gases were measured at different temperatures of coal samples with different particle sizes. The selection of index gas was discussed. The variation rules of CO, CO2 and other gases with temperature , The relationship between oxygen consumption rate and coal temperature and coal particle size was obtained.The results show that the smaller the coal particle size and the higher the temperature, the greater the strength of the coal-oxygen complex.The results of this experiment have guidance to the prevention and treatment of coal mine fires effect.