Experiment and Failure Analysis of Rock-Like Material Affected by Different Excavation Depths

Figure 13

The stress-strain curve and crack coalescence process of specimen with single-hole crack: (a) H = 0 mm, (b) H = 20 mm, (c) H = 40 mm, (d) H = 60 mm, (e) H = 80 mm, and (f) H = 100 mm.

(a)

(b)

(c)

(d)

(e)

(f)