Effects of Unidirectional In Situ Stress on Crack Propagation of a Jointed Rock Mass Subjected to Stress Wave

Figure 11

The stress distribution and damage zone around a blast hole under unidirectional in situ stress (Case II:  = 0.5 MPa). (a) Distribution of tensile and compressive stress. (b) Damage zone around a blast hole.

(a)

(b)