Study on the Generation Mechanism and Development Law of the Zonal Disintegration in Deep Burial Tunnels

Figure 6

The plastic and fractured zones under different axial stress. (a) Plastic zone (1 time). (b) Fractured zone (1 time). (c) Plastic zone (0.8 time). (d) Fractured zone (0.8 time).

(a)

(b)

(c)

(d)