Research Article
Study on Dynamic Evolution of Roof Crack and Support Timing of Secondary Tunneling for Large Section Open-Off Cut in Deep Mines
Table 4
Properties of support elements used in the model.
| ā | Contact properties | Value |
| Anchor cable | Elastic modulus (GPa) | 200 | Tensile yield strength (kN) | 380 | Stiffness of the grout (N/m/m) | 2e9 | Cohesive capacity of the grout (N/m) | 4e5 |
| Structure | Elastic modulus (GPa) | 200 | Tensile yield strength (MPa) | 500 | Compressive yield strength (MPa) | 500 | Interface normal stiffness (GPa/m) | 10 | Interface shear stiffness (GPa/m) | 10 |
|
|