Table 2 Table of rock mechanical parameters.
Lithology | Thicknesses (m) | Densities (kg*m-3) | Bulk modulus (GPa) | Shear modulus (GPa) | Cohesive (MPa) | Internal friction angle (°) |
|---|---|---|---|---|---|---|
Siltstone | 8 | 2450 | 2.3 | 1.8 | 5.6 | 40 |
Shale | 22 | 2150 | 4.1 | 3.9 | 3.2 | 38 |
Fine Sandstone 1 | 20 | 2550 | 12.3 | 10.8 | 6.6 | 42 |
Medium Sandstone | 12 | 2650 | 13.6 | 12.1 | 6.6 | 40 |
Fine Sandstone 2 | 8 | 2550 | 14.5 | 13.7 | 7.3 | 42 |
Coal 3 | 4 | 1440 | 1.83 | 1.53 | 2.7 | 38 |
Sandy Mudstone 1 | 8 | 2150 | 4.2 | 3.8 | 3.2 | 38 |
Fine Sandstone 3 | 16 | 2550 | 12.3 | 10.8 | 6.6 | 42 |
Sandy Mudstone 2 | 12 | 2350 | 4.2 | 3.8 | 3.5 | 38 |
Fine Sandstone 4 | 10 | 2550 | 14.5 | 13.7 | 7.3 | 42 |
