Abstract：Under the influence of the complicated geological conditions, the method of sampling analysis by pipe for dividing "three-zone" in the goaf has many limitations. Utilizing the method of numerical simulation to analyze "three-zone" in the goaf becomes the main means. The fluid mechanics calculation software, Fluent is applied to simulate the air leakage flow field status in the goaf of 1121(3) working face of Panbei Mine, Huainan Mining Group, and then the "three-zone" of goaf location and area are obtained according to the air leakage flow field simulation result. The results show that the width of "oxidation-zone" is about 40 meters. Considering the coal spontaneous combustion stage is three to six months, it is impossible that the residual coal in the goaf is spontaneously combusted during a working face mining process. At last, the different air leakage flow field status in the goaf is obtained under the condition of different ventilation quantity. It is found that the more ventilation quantity is provided, farther away from the working face the location of "oxidation-zone" is and the wider extent of "oxidation-zone" is.
2011, Vol. 28 
