矿井突水灾害是威胁我国煤矿安全生产的重大隐患和技术难题,为更准确地预测预报矿井突水灾害,通过耦合多孔介质流动方程、多孔介质传热方程和固体力学方程,利用多物理场耦合数值模拟软件COMSOLMultiphysics建立了温度场-渗流场-应力场(THM)多场耦合数值模拟模型,模拟断层导通含水层和工作面引发顶板水害,研究多场耦合作用下不同含水层水压下地下水渗流速度分布及其变化规律,以及渗流场作用下地下岩体温度场分布及其变化规律。研究得出,煤层上部含水层水压越大,对工作面附近煤岩体的降温作用就越大,能够用来反映渗流场的变化及预测突水危险性的大小,对矿井突水灾害的预防具有指导意义。

The mine water inrush disaster is a major hidden danger and technical difficulties that threatens the safety production of coal mines in China. In order to more accurately predict and forecast mine water inrush disasters, by coupling the flow equation of porous media, the heat transfer equation of porous media, and the solid mechanics equation, a temperature field-seepage flow field-stress field (THM) multi field coupling numerical simulation model is established using the multi physic field coupling numerical simulation software COMSOL Multiphysics. The model simulates the roof water hazard caused by the fault conducting aquifer and working face, and studies the seepage velocity distribution and its variation law of groundwater under different aquifer water pressures under the action of multi field coupling, as well as the temperature field distribution and its variation law of underground rock mass under the action of seepage flow field. The research shows that the higher the water pressure in the upper aquifer of the coal seam, the greater the cooling action on the coal and rock mass near the working face. This can be used to reflect changes in the seepage flow field and predict the magnitude of water inrush danger, which has guiding significance for the prevention of mine water inrush disasters.