Abstract: Through the analysis of hydrographic condition in Shanmushu Coal Mine, applying physical similarity and numerical simulation experiment method, the paper simulated development height, range and surface cracks of water flowing fractured zone caused by mining. Then, combined with F-RFPA^2D numerical simulation of solid liquid coupling conditions caused by mining overburden water flowing fractured zone height and its development and morphology of porous flow process, the simulation results show that height of water flowing fractured zone is 70 m with mining height of 2 m, mining area overlying rock and riverbed destruction is smaller, and it can realize safe mining under the Shitangou River.