Rock | Modulus of elasticity E/GPa | Poisson’s ratio | Severe/ (KN·m−3) | Cohesion c/MPa | Angle of internal friction φ/(˚) |
Sandstone | 12.6 | 0.24 | 20.2 | 4.45 | 46.52 |
Mudstone | 9.25 | 0.18 | 21.0 | 1.51 | 38.48 |