Influence of Charge Hole Spacing on the Crack Propagation Behavior under the Effect of Empty-Hole Directional Blasting

Figure 4

Crack distribution of different charge hole spacing. (a) 600 mm. (b) 600 mm. (c) 800 mm. (d) 800 mm. (e) 1000 mm. (f) 1000 mm. (g) 1200 mm. (h) 1200 mm.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)