Research Article

Numerical Simulation Research of Smooth Wall Blasting Using the Timing Sequence Control Method under Different Primary Blast Hole Shapes

Figure 18

Cracks formation diagram under different blast hole spacing when PBH is a round hole. (a) H = 50 cm. (b) H = 60 cm. (c) H = 70 cm. (d) H = 80 cm. (e) H = 90 cm. (f) H = 100 cm. (g) H = 110 cm. (h) H = 120 cm.