The shortest period of coal spontaneous combustion on the basis of oxidative heat release intensity

It's necessary to forecast the shortest spontaneous combustion period for preventing and controlling the coal spontaneous combustion. During the experimental process, a calculating model of the SSCP is established on the basis of the oxidative heat release intensity and thermal capacity at different temperatures. According to the basic parameters of spontaneous combustion, heat of water evaporation and gas desorption, the SSCPs of different coals are further predicted. Finally, this study analyzed the relationships of the SSCP and the judging indexes of the self-ignite tendency. The result shows that the SSCP non-linearly increases with the decrease of dynamic oxygen adsorption and increase of activation energy. Compared with the practical fire situation of mine, this reliable method can meet the actual requirement of mine production. (C) 2014 Published by Elsevier B.V. on behalf of China University of Mining & Technology.