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

Figure 8

Geological analysis of the tunnel face. (a) Overall drawing of the tunnel face. (b) Right side of the tunnel face. (c) Water gushing from cracks on the left side of the tunnel face. (d) Water pouring downward from the crown.

(a)

(b)

(c)

(d)