Experimental study on characteristic temperature of coal spontaneous combustion

Using the coal spontaneous combustion experiment platform as the experimental testing method, based on Dafosi (defined as DFS) coal sample and Dongtan (defined as DT) coal sample, the characteristic temperature of coal spontaneous combustion was found out through a series of parameters such as heating rate, oxygen consumption rate, gas generation rate, single gas and composite gas index, and the corresponding relationship between characteristic temperature and each parameter was analyzed, the corresponding relationship between coal temperature and relevant parameters of gas generation is established, and the characteristic temperature of coal spontaneous combustion is determined as T 1 = 35 °C, T 2 = 55 °C, T 3 = 75 °C, T 4 = 100 °C, T 5 = 145 °C, T 6 = 190 °C, T 7 = 230 °C, T 8 = 310 °C.