Mechanical parameters of the supporting rock mass
| Parameter | Value |
|---|---|
| Thickness: mm | 30 |
| Elastic modulus: GPa | 40 |
| Compressive strength: MPa | 380 |
| Internal friction angle: ° | 30 |
| Ratio of uniaxial compressive strength to uniaxial tensile strength | 10 |
| Residual strength: % | 0·1 |
| Parameter | Value |
|---|---|
| Thickness: mm | 30 |
| Elastic modulus: GPa | 40 |
| Compressive strength: MPa | 380 |
| Internal friction angle: ° | 30 |
| Ratio of uniaxial compressive strength to uniaxial tensile strength | 10 |
| Residual strength: % | 0·1 |
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