Fig. 8

Validation of the proposed evolution equation for different initial stress state conditions (H = 500 m, \(\varphi = 30^\circ \, \alpha = 15^\circ\), \(d/R = 1\) and \(\lambda\) = 1). For this specific case m = 0.35 and n = 1.2.

Validation of the proposed evolution equation for different initial stress state conditions (H = 500 m, \(\varphi = 30^\circ \, \alpha = 15^\circ\), \(d/R = 1\) and \(\lambda\) = 1). For this specific case m = 0.35 and n = 1.2.