Research Article
Optimization for U-Shaped Steel Support in Deep Tunnels under Coupled Static-Dynamic Loading
Table 3
Rock mechanical parameters.
| Parameter | Supporting section surrounding rock |
| Young’s modulus (GPa) | 98 | Poisson’s ratio | 0.22 | Compressive strength (MPa) | 75 | Tensile strength (MPa) | 10 | Internal friction angle | 35 | Cohesion (MPa) | 27 |
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