By constructing a coupling analysis numerical model of a Darcy-Forchheimer flow in aquifers, fault zones, and fracture zones after fault water inrush, the variations in porosity, permeability, and volumetric strain under fluid-solid coupling during coal seam mining were studied. The mechanism of fault water inrush was obtained. Grouting was carried out on the aquifer, fault fracture zone, and fracture zone. The mechanisms of flow velocity and pressure evolution in the cross-section during the grouting sealing process were obtained. The simulation results show that the Forchheimer equation can help to effectively simulate and calculate the flow process of current with high water pressure and high flow velocity. There were notable changes in the water pressure partition and porosity after the fault stretch, and the influence of stress-seepage coupling on the non-Darcy flow characteristics in the fault was significant. Through a simulation analysis of grouting at different grouting positions, the change law of flow velocity and pressure in the grouting process was obtained, which is of great significance for selecting appropriate grouting positions and optimizing grouting technology.

中文翻译：

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渗流断层突水注浆封堵机理

通过构造达西—福希海默流在断层突水后在含水层，断层带和裂缝带中的耦合分析数值模型，研究了煤层开采过程中流固耦合下的孔隙度，渗透率和体积应变的变化。得出了断层突水的机理。在含水层，断层断裂带和断裂带上进行注浆。在灌浆密封过程中，获得了截面内流速和压力演化的机理。仿真结果表明，Forchheimer方程可以有效地模拟和计算高水压，高流速的电流流动过程。断层伸展后水压分配和孔隙率发生了明显变化，应力-渗流耦合对断层非达西渗流特征的影响很大。通过对不同注浆位置的注浆进行仿真分析，得出注浆过程中流速和压力的变化规律，对于选择合适的注浆位置和优化注浆工艺具有重要意义。