Abstract: Aimed at the problems of coal spontaneous combustion at large mining height workface of close distance coal seams in the mine with positive pressure ventilation, taking 12314 fully mechanized caving face of Daliuta Coal Mine as an example, we analyzed the dangerous factors of residual coal in gob during mining period, and established prediction and forecast system of coal spontaneous combustion; the comprehensive technology of fire prevention and extinguishment was provided by controlling the air distribution of face as the core and secondarily by injecting nitrogen, grouting, sealing air leakage in the gob.