Abstract: The roof water inrush seriously affects the safety production of coal mine.The author analyzed the characteristics of aquifer and aquifuge in Haitian Coal Mine 3618 upper layered working face, considered the influence of seepage field, established the damage-seepage coupling model with the rock porosity and damage factor as the independent variable, and established the flow-solidity coupling computation model of deep-buried thick coal seam mining by FLAC^3D,and analyzed the plastic zone of the overlying rock of goaf, and the evolution of the seepage field with the advancement of the working face.The results show that with the advancement of the working face, the distribution pattern of plastic zone and seepage field changes from trapezoidal to saddle shape; when the working face reaches full mining, the maximum heights of the collapse zone and fissure zone are 24 m and 113 m, respectively; on-site monitoring reveals that the mine water inrush is not affected by the rainfall on the surface, and the 50m thick sandy shale is connected by fissure zone.