Abstract: For the features of many times of sealing in the history, easy to spontaneous combustion of gob, high gas and super thick coal seam in Taxihe Mine No. 2 Mining Area B₉ full-mechanized caving mining face, the effect of using general fire prevention and extinguishing means to control fire area is not obvious. The three-dimensional fire prevention measures of fire area sealing and drainage pipeline management matching, nitrogen injection and borehole grouting, temperature measurement can quickly and effectively inert, suffocate fire area to create conditions for safety unsealing of working face.