Research Article
A Large Goaf Group Treatment by means of Mine Backfill Technology
Table 2
Rock mass mechanical variables.
| Variables | Slate | Ore |
| Uniaxial compressive strength (MPa) | 9.38 | 7.65 | Uniaxial tensile strength (MPa) | 0.61 | 0.68 | Apparent cohesion (MPa) | 2.28 | 2.11 | Angle of friction (°) | 34.87 | 32.74 | Young’s modulus (GPa) | 13.65 | 10.95 | Specific gravity | 2.58 | 3.67 | Poisson’s ratio | 0.31 | 0.18 |
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