Abstract: As coal mining operations in China progressively advance to greater depths,mining safety under deep extraction conditions faces severe threats from fault-induced water hazards.Dynamic coupling between floor and fault damage zones leading to water inrush represents one of the most pressing challenges requiring immediate resolution.A "seepage-damage" evolution model for the floor-fault damage zone coupling region was developed through theoretical analysis and similar material simulation experiments to analyze the dynamic disaster mechanisms of the coupling process.A deep mining face under fault threats in Shandong Province served as the research context,where geological exploration and field monitoring data were integrated to establish a coupled "stress-seepage" numerical model.The model incorporates dynamic rock mass permeability equations to simulate extraction processes.Spatio-temporal evolution characteristics of damage zone coupling were analyzed under three factor synergy of coal seam depth, fault dip angle, and aquifer pressure.Analysis reveals three Spatio-temporal evolution stages based on coupling characteristics: Initial Stable Period,Synergistic Catastrophe Period, and Complete Coupling Period;Coal seam burial depth governs the Spatio-temporal evolution scale of floor-fault damage zone coupling by modulating the intensity of the in-situ stress field.With the increase of buried depth,the mining unloading and stress redistribution are more intense,which has a more significant Spatio-temporal compression effects on each stage of the "seepage-damage" evolution model;Fault dip angle influences the coupling morphology by disrupting uniform stress transmission and altering the lift paths of confined water.The shallower the fault dip angle, the larger the intersection area between the fault and floor damage zones and the greater the number of seepage fractures, leading to accelerated damage zone coupling;Aquifer pressure serves as the driving force promoting floor-fault damage zone coupling,governs its temporal progression and disaster intensity, and its elevation triggers the transition of the failure mechanism to "seepage-damage" coupling.The research findings offer reference for predicting and preventing damage zone coupling under various influential conditions, and provide a theoretical basis for water hazard control efforts in deep mining faces.