In recent years, China's coal mines have entered the stage of deep mining, and the mining environment and geological conditions become more and more complex. In this paper, the factors that influenced the seepage of coal seam at the bottom of coal mining were mainly discussed. By constructing the fluid solid coupling state model, the mathematical tool was combined with the theoretical mechanism and the numerical simulation method to discuss the formation mechanism of coal seam floor failure under the coupling of seepage and stress. The coupling analysis F-RFPA2D system of seepage and stress in the coal seam in the damaged rock was used. Based on the case study of the coal seam floor rock structure in a coal mine, the numerical model of the coupling effect of the seepage field was established.With the help of the model, the failure characteristics of coal seam floor and its corresponding stress field and seepage characteristics were reproduced, which provided base data for the in- depth analysis of water inrush mechanism in coal mine floor in China
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