Abstract: In order to prevent the spotaneous combustion accident of coal in goaf in gassy and high spontaneous combustion propensity coal seam, 19 influencing factors were identified according to the characteristics of goaf spontaneous combustion in this kind of coal seam. The factors were treated by using the integrated DEMATEL and ISM method based on intuitionistic fuzzy sets. A multi-level hierarchical structure model was built for the factors and the respective influences of the factors were examined. The results show that the factors influencing goaf spontaneous combustion in gassy and high spontaneous combustion propensity coal seam can be divided into three levels: the root factors are the ventilation mode, the length of working surface, the oxygen absorption rate, the critical temperature, the residual gas content, the thickness of coal seam, the dip angle and geological structure of coal seam. Intermediate factors are the gas condition in adjacent layer, the mining method of working surface. The air quantity of ventilation and advancing speed of working surface. The surface factors are the fire prevention measures, the safety monitoring, the goaf residual coal thickness, the gas extraction measures, the ventilation resistance of working surface, the advancing speed, the surrounding rock temperature, the depth of coal seam and the roof lithology, and that more attention should be paid to improving the root factors.

Key words: intuitionistic fuzzy sets, decision making trial and evaluation(DEMATEL), interpretive structural model( ISM), high gassy coal seam, coal spontaneous combustion