Fig. 6

Evolution of the safety factor as a function of depth for \(K_0 = 0.5\), \(E = 2\times 10^9\) Pa, \(\frac{d}{R} = 1\), \(\alpha = 13.5^\circ,\) \(\varphi = 30^\circ\).

Evolution of the safety factor as a function of depth for \(K_0 = 0.5\), \(E = 2\times 10^9\) Pa, \(\frac{d}{R} = 1\), \(\alpha = 13.5^\circ,\) \(\varphi = 30^\circ\).