A study of the process simulation of water burst in a karst tunnel based on different seepage equations

The mechanism of water burst in karst tunnel excavation is complex.Based on Darcy’s law,Brinkman equation and Navier-Stokes(N-S) equations,multi-coupling software is used to simulate water burst process in this paper.Deep aquifer can be expressed using Darcy’s law,the broken zone of excavation is expressed using Brinkman equation and free face of the tunnel is expressed using N-S equations in a karst tunnel.Taken the Mingyueshan tunnel as an example,the results show that single fracture flow is ...