Stress-seepage Coupled Analysis of Roof in Fully-mechanized Working Face of Nearly Flat Coal Seam

The exploitation of coal resources in China is developed in the direction of big depth, high ground stress, and high karst water pressure and ground temperature direction, and coal mines face a wide variety of disasters. This paper uses the stress-seepage coupling method to analyze the seepage field and stress field evolution in the process of coal mining under confined aquifer, analyzes the laws of rock breaking in working face advancing process and the guiding effect of rock interface on rock fracture propagation path and the change laws of pore water pressure water head distribution, and predicts the possibility of pressurized fluid entering the working face.