Research Article
Analytical Assessment of Internal Stress in Cemented Paste Backfill
Table 7
Model parameters adopted for sensitivity analysis and model application.
| Type of model parameters | Model parameters | Value |
| Interface properties | Interface friction angle ɸ (°) | 31.5 | Interface adhesion c (kPa) | 14.2 |
| CPB material properties | Internal friction angle φ (°) | 31.5 | Reaction coefficient K (−) | 0.27 | Parameter of the WRC model α (m−1) | 0.049 | Parameter of the WRC model m (−) | 0.44 | Air entry value of CPB Pe (kPa) | 200 | Fitting parameter of effective stress R (−) | −0.55 | Saturated unit weight of CPB γCPBs (kN/m3) | 18 | Unsaturated unit weight of CPB γCPBu (kN/m3) | 14 |
| Barricade parameter | Coefficient of permeability Kb (cm/s) | 0.17 |
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Symbol “-” indicates dimensionless unit.
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