Abstract: Bulianta Coal Mine is a modern large-scale mine owned by Shendong Coal Group, and the main coal seams are thick coal seam and spontaneous coal seam. In the past, due to the limited technical conditions, there is much residual coal in the goaf, especially under the conditions of close coal seam mining and shallow buried depth, the mine fire fighting pressure is great. In order to prevent the coal spontaneous combustion in goaf, a set of up and down joint grouting system for well with fixed grouting station and mobile grouting station is constructed. The system is suitable for large area mining field, close distance coal seam group mining of mine, and can very good solve serous problems of traditional single mode of the long distance laying of grouting pipe, easy blocking of tube, poor coverage of grouting to greatly reduce the cost of fire prevention. Through the practice inspection from 2012 to 2017, the system is in good operation, and the preventive grouting in 32 goafs has been completed, which prevents the coal spontaneous combustion in goaf, and has achieved good results to ensure the safe production of the mine.