Damage Evolution and Circumferential Strain Distribution Characteristics of the Bolt-Supported Cavern under Multiple Explosion Sources

Figure 7

The damage evolution process of the underground cavern under the simultaneous top explosion and side arch explosion. (a) t = 0.3 ms. (b) t = 0.4 ms. (c) t = 0.5 ms. (d) t = 0.6 ms. (e) t = 0.8 ms. (f) t = 1.0 ms. (g) t = 1.5 ms. (h) t = 2.2 ms.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)