Fig. 9

Comparative analysis of k under different mechanical laws at Dm = − 60 m. a Mohr–Coulomb criterion with μ = 0.7; b Slip weakening law with μs = 0.7, μd = 0.6, and Dc = 0.02 m

Comparative analysis of k under different mechanical laws at Dm = − 60 m. a Mohr–Coulomb criterion with μ = 0.7; b Slip weakening law with μs = 0.7, μd = 0.6, and Dc = 0.02 m