Through the study of the spontaneous combustion of thick coal seam fire prevention and extinguishing technology, mining planning and ventilation system were optimized. Goaf pipe grouting, three-phase foam, composite slurry spraying wind insulation and a number of new technologies, new materials and new technology were applied, which made an obvious effect on fire preventing and extinguishing fire in Gequan mine and exerted a certain guiding significance for mine fire under similar conditions.