Fig. 9

Evolution of the shear stress on the discontinuity and the shear stress around the tunnel after its excavation (H = 500 m, \(E = 2 \times 10^9\) Pa, \(K_0 = 0.5\), and \(d/R = 1\)).

Evolution of the shear stress on the discontinuity and the shear stress around the tunnel after its excavation (H = 500 m, \(E = 2 \times 10^9\) Pa, \(K_0 = 0.5\), and \(d/R = 1\)).