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.
| | | 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 |
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