Table 1 Mechanical parameters of simulated stratum.
Lithology | Elastic modulus/GPa | Poisson’s ratio | Tensile strength/MPa | Cohesion/MPa | Internal friction angle/(°) | Normal stiffness/GPa | Coefficient of friction | Normal stiffness of parallel bond/GPa | Contact modulus |
|---|---|---|---|---|---|---|---|---|---|
Peat | 1.20 | 0.20 | 4.00 | 5.00 | 36 | 4.4 | 0.3 | 4.4 | 4.5 |
Coal seam 4 | 2.65 | 0.33 | 1.33 | 5.00 | 36 | 0.5 | 0.2 | 0.5 | 5.1 |
Fine sandstone | 8.51 | 0.26 | 1.68 | 5.40 | 38 | 6.8 | 0.5 | 6.8 | 16.9 |
Siltstone | 1.20 | 0.20 | 4.00 | 5.00 | 36 | 7.4 | 0.5 | 7.4 | 6.7 |
Coarse sandstone | 6.31 | 0.25 | 1.31 | 5.40 | 38 | 6.2 | 0.4 | 6.2 | 16.9 |
Topsoil | 0.20 | 0.45 | 0.20 | 0.60 | 44.3 | 0.2 | 0.1 | 0.2 | 1.5 |
