Abstract: To address water inrush control in water-rich fractured rock tunnels, this study is focused on the Chaor River to the Western Liaohe River Water Diversion Tunnel Project. Statistical analysis of rock mass fracture characteristics was conducted, and an equivalent fractured rock numerical model was developed based on field observations of water inrush to assess full-face grouting and sealing performance. The results reveal that interconnected fractures penetrating the tunnel serve as dominant pathways for water inrush, with single-point polyurethane grouting showing limited effectiveness in sealing continuous fracture flow paths. The established 3D equivalent numerical model accurately simulates actual water inrush conditions, demonstrating that increasing the grouting ring thickness to 2.5-4.0 m while reducing permeability to 2.07×10??-4.14×10?? cm/s can reduce water inrush by 83.27-93.25%.Field application of full-face cement-sodium silicate double-liquid grouting proved highly effective, achieving 96.9-98.3% sealing efficiency and transforming gushing water and large-area linear flow into localized dripping and a small linear flow.