Discussion on the nonlinear seepage model of the fractured Rock mass under excavating

The process of surrounding rock crushing and water rushing under excavating or mining contains four phase, Darcy laminar flow in the aquifer, High velocity(relativity) Non-Darcy flow in transitional zone and fracture zone, and the Navier-Stokes turbulence in drift. In this paper, a model was suggested to simulate the process of fluid flows surround the fractured rock mass, in which Darcy flow and non-Darcy flow in Rock mass have been considered together. In this model, the aquifer, transitional zone, fracture zone and drift was connected together by coupling the Darcy Equation, Brinkman Equation, Forchheimer Equation and Navier-Stokes Equation. Some examples were performed, and the results show the reliability of this model.