Study on Temperature-hydrological-mechanical Coupling Model for Fault Water Inrush

In order to investigate the confined water flow laws in the process of fault water- inrush under the condition of high water pressure, high stress and high ground temperature in deep mine，a temperature (T)- hydrological (H)- mechanical (M) coupling model was established by using COMSOL. The nonlinear water flow equation couples Darcy’s law, Brinkman equation and Navier-Stokes equation. Results show that this THM coupling model can describe the interaction relationship of temperature field, hydrological field and mechanical field. The nonlinear water flow equation can describe the nonlinear migration of confined water from aquifer through fault fracture zone to roadway. The mining stress and the water velocity have great influence on the temperature of fault zone. The temperature change of fault zone can reflect the change of seepage field in the fault and confined aquifer. Therefore, monitoring the temperature change of fault zone, the fault water inrush can be predicted.