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

Figure 12

The distribution of stress and crack propagation around a blast hole under unidirectional in situ stress (Case III:  = 1.0 MPa). (a) Distribution of tensile and compressive stress. (b) Crack propagation along the loading direction.

(a)

(b)