Table 2 Mechanical parameters of the 1353 working face strata.
From: Research on process parameter optimization of irregular coal face
Rock type | Thickness (m) | Bulk density (kg/m3) | Bulk modulus (GPa) | Cohesion force (MPa) | Internal friction angle (°) | Tensile strength (MPa) |
|---|---|---|---|---|---|---|
Coarse sandstone | 23.3 | 2550 | 13.625 | 4.32 | 42 | 6.23 |
Fine sandstone | 18 | 2450 | 10.833 | 2.75 | 38 | 4.01 |
Mudstone | 16 | 2350 | 8.266 | 2.58 | 33 | 3.85 |
Fine sandstone | 11.5 | 2450 | 10.833 | 2.75 | 38 | 4.01 |
Coarse sandstone | 13.5 | 2550 | 13.625 | 4.32 | 42 | 6.23 |
Siltstone | 8.0 | 2420 | 11.856 | 2.83 | 39 | 6.91 |
Silty fine sandstone | 11.0 | 2471 | 10.833 | 2.75 | 38 | 3.815 |
Siltstone | 6.0 | 2420 | 11.856 | 2.83 | 39 | 6.91 |
Silty fine sandstone | 9.0 | 2471 | 10.833 | 2.75 | 38 | 3.815 |
Coal seam | 5.3 | 1376 | 4.907 | 1.25 | 32 | 0.73 |
Siltstone | 3.3 | 2420 | 11.856 | 2.83 | 39 | 6.91 |
Coal seam | 3.5 | 1376 | 4.907 | 1.25 | 32 | 0.73 |
Silty fine sandstone | 8.5 | 2471 | 10.833 | 2.75 | 38 | 3.815 |
Siltstone | 15.0 | 2400 | 12.856 | 3.83 | 39 | 5.06 |
