Water Inrush Risk Assessment Based on AHP and Advance Forecast Approach: A Case Study in the Micangshan Tunnel

Table 14

Dynamic risk prediction method of water inrush in tunnel.

Dynamic prediction method	Primary dynamic prediction		Secondary dynamic prediction	Tertiary dynamic prediction
Risk level	I (extremely low-risk area)	II (low-risk area)	III (moderate-risk area)	IV (high-risk area)	V (extremely high-risk area)
Dynamic risk prediction methods	Geological analysis of the tunnel face; TSP or TRT detection		Geological analysis of the tunnel face; TSP or TRT detection; GPR or TEM or infrared water detection method	Geological analysis of the tunnel face; TSP or TRT detection; GPR or TEM or infrared water detection method; advanced drilling