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

Figure 20

The stress curve of TBH hole wall measuring element b1 before TBH initiation. (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.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)