(a)
(b)
(c)
(d)
(e)
Figure 5: Maximum shear stress (upper) and pore pressure (lower) evolution diagram of different crack angle models. (a)  = 15°, step: 11–40; (b)  = 30°, step: 10–25; (c)  = 45°, step: 10–15; (d)  = 60°, step: 14–27; (e)  = 75°, step: 32–18.