Abstract: According to the characteristics of large air flow and easy self-ignition in compound seam at E_9-10-16150 working face with large mining height, by measuring the distribution law of oxygen content and temperature in gob, the range of stereo "three zones" in gob is analyzed, and measures for fire prevention and extinguishing are established according to characteristics of the workface, So the range of oxidation zone in gob is reduced greatly and spontaneous combustion of residual coal in goaf is prevented.