| Type of support | Density (kg·m−3) | Modulus of elasticity/GPa | Uniaxial compressive strength/MPa | Poisson’s ratio |
| C25 concrete | 2570 | 22.5 | 11.5 | 0.21 |
| C30 second lining | 2500 | 30.5 | 21.3 | 0.20 |