Abstract：In view of the issues of gas emission control for thick coal seam layering mining,a mathematical model for goaf flow field distribution was established,using numerical simulation calculation method. Then,the gas flow field distribution rule of the first layer face 0102102 at Baijigou mine during the mining working face was studied. The results show that: in the advancing direction,the wind speed decreases and the gas volume fraction increases from working face to deep goaf; in the inclined direction,the gas concentration along return aircourse is higher than that along intake airway; in the vertical direction,the gas concentration increases gradually from the floor of working face to the roof of goaf; under the premise that do not take other measures,the gas concentration on the working plane angle and return aircourse will be overrun whether the working face of the first layer face 0102102 were mined early or late. The research results can provide a theoretical basis for the gas comprehensive control of thick coal seam layering mining.

Keyword：thick coal seam;layer mining;goaf;gas flow field;