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 parametersModel parametersValue

Interface propertiesInterface friction angle ɸ (°)31.5
Interface adhesion c (kPa)14.2

CPB material propertiesInternal 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 parameterCoefficient of permeability Kb (cm/s)0.17

Symbol “-” indicates dimensionless unit.