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Initial calculation parameters of rock mass and segment.
| Types | Density ρ (kg/m3) |
Elastic modulus E (GPa) |
Bulk modulus K (GPa) |
Shear modulus G (GPa) |
Cohesion C (MPa) |
Friction angle φ (°) |
Poisson’s ratio μ |
Permeability coefficient k (cm/s) |
|---|---|---|---|---|---|---|---|---|
| Surrounding rock | 2680 | 2.58 | 1.95 | 1.01 | 1.34 | 22.80 | 0.28 | 1.2 × 10−4 |
| Segment (C50) | 2450 | 34.50 | 17.27 | 14.78 | – | – | 0.167 | – |
