Study on Optimization of Delay Method of Wedge Cut Blasting in Tunnel

Figure 8

Crack propagation process of wedge-shaped double-hole blasting: (a) t = 0.059 ms, (b) t = 0.54 ms, (c) t = 1.38 ms, (d) t = 1.439 ms, and (e) t = 2.819 ms.

(a)

(b)

(c)

(d)

(e)