Research Article
Effect of Strain-Dependent Hydraulic Conductivity of Coal Rock on Groundwater Inrush in Mining
Table 3
Parameters and lithology of the numerical model of water inrush in the working face.
| | Lithology | Thickness (m) | Density (kg/m3) | Elastic model (GPa) | Poisson’s ratio | Cohesion (MPa) | Tensile strength (MPa) | Internal friction angle (°) | Dilatancy angle (°) | Hydraulic conductivity (×10-6 cm/s) | Porosity |
| | Roof | 100 | 2600 | 5.00 | 0.25 | 3.0 | 2.6 | 32 | 24 | 10.8 | 0.2 | | Siltstone | 6 | 2550 | 2.30 | 0.27 | 2.6 | 2.5 | 32 | 23 | 3.0 | 0.15 | | Fine sandstone | 12 | 2600 | 5.00 | 0.25 | 3.0 | 2.8 | 32 | 24 | 10.8 | 0.2 | | Mudstone | 3.5 | 2500 | 1.45 | 0.35 | 1.3 | 1.0 | 30 | 22 | 1.0 | 0.1 | | Fine sandstone | 16 | 2600 | 5.00 | 0.25 | 3.0 | 2.8 | 32 | 24 | 10.8 | 0.2 | | Siltstone | 4 | 2550 | 2.30 | 0.27 | 2.6 | 2.5 | 32 | 23 | 3.0 | 0.15 | | No. 8 coal | 3.5 | 2000 | 1.40 | 0.3 | 1.2 | 1.0 | 28 | 22 | 1.0 | 0.1 | | Siltstone | 8 | 2550 | 2.30 | 0.27 | 2.6 | 2.5 | 32 | 23 | 3.0 | 0.15 | | Mudstone | 4 | 2500 | 1.45 | 0.35 | 1.3 | 1.0 | 30 | 22 | 1.0 | 0.1 | | Fine sandstone | 4 | 2600 | 5.00 | 0.25 | 3.0 | 2.8 | 32 | 24 | 10.8 | 0.2 | | Siltstone | 10 | 2550 | 2.30 | 0.27 | 2.6 | 2.5 | 32 | 23 | 3.0 | 0.15 | | Floor | 34 | 2600 | 5.00 | 0.25 | 4.0 | 3.2 | 32 | 24 | 10.8 | 0.2 |
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