Research Article
Constitutive Model of Solid Backfill Materials and Numerical Simulation of Overburden Movement and Deformation in Backfill Mining
Table 2
Physical and mechanical parameters of the model.
| | Lithology | Thickness (h/m) | Density (ρ/kg/m3) | Bulk modulus, K (GPa) | Shear modulus, G (GPa) | Cohesive force (c/MPa) | Internal friction angle (φ/°) |
| | Surface soil | 133 | 1300 | 5.6 | 1.85 | 1.5 | 26 | | Sandstone | 29 | 2500 | 22.7 | 11.7 | 8.3 | 32 | | Mudstone | 42 | 2400 | 8.3 | 3.8 | 6.1 | 30 | | Sand-mudstone | 64 | 2300 | 11.4 | 5.8 | 6.5 | 31 | | Sand-mudstone | 34 | 2300 | 15.2 | 7.8 | 6.4 | 31 | | Mudstone | 18 | 2400 | 8.3 | 3.8 | 6.1 | 30 | | Sandstone | 37 | 2500 | 16.7 | 10 | 8.3 | 32 | | #2 coal seam | 3.3 | 1800 | 4.17 | 1.09 | 2.1 | 28 | | Sandstone | 30 | 2500 | 16.7 | 10 | 8.3 | 32 |
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