Abstract: In order to better grasp the influence of different locations of the air leakage on the distribution of “three zones” in the fully mechanized top coal caving mining face in the adjacent coal seam, it is necessary to prevent the “three zones” range. According to the actual situation of the working face, the physical models of the stope in the different air leakage locations are established, and the UDF is used to compile the source term of O₂ attenuation in gob and porosity and permeability in residual coal area, caved zone and fractured zone. Based on this, when the air leakage is located in the（30, -80, 47）, （30, 0, 47）, （30, 80, 47）, the distribution of “three zones” of spontaneous combustion is analyzed by means of numerical simulation. The results show that the area of the air leakage zone is the smallest when the air leakage is located in the gob of the inlet side; when the air leakage is located in the middle of the gob, the area of the heat dissipation zone is the smallest; it is necessary to prevent the spontaneous combustion zone of floating coal seam from 24.1 m to 127.2 m in intake side, and 18.5 m to 84.3 m in the return air side, 18.5 m to 84.3 m in the middle of the goaf.