断层突水非线性渗流-应力耦合研究

Specific to the problem of increasingly severe inrush of water from the fault, the non-Darcy flow equation is applied to the fractured rock mass with the consideration of the effect of the stress and pore water pressure on fillings in the fault and fracture, so as to uncover the problem of fluid-solid coupling in the fault water inrush process, the water-rock interaction at different time and different stages, and the law of water flow. The Comsol Multiphysics software is adopted to establish the Darcy and non-Darcy free flow equation before and after the fault breakover in three stages, that is, the aquifer, fault and working face. Thus obtaining the fault water inrush and current flow mechanism under the effect of stress and water pressure. Results show that the non-Darcy Forchheimer equation can help to simulate and calculate the flow process of current with high water pressure and high flow rate effectively. The influence of liquid-solid coupling on the non-Darcy flow characteristics in the fault is significant. References can be provided by the research results for the prevention of fault water inrush issue in the coal mine inrush and the post-inrush treatment work. ?????