Table 8 Input parameters, initial values and boundary conditions of control CPB and rock mass.
Parameter | Value |
|---|---|
Backfill | |
 Stope size (m) | 8(W) × 16(H) |
 Barricade size (m) | 4(W) × 4(H) |
 Stope inclination angle (°) | 90 |
 Cement content (wt%) | Residual fill: 4.5, and plug fill: 7 |
 w/c ratio | 7.6 |
 Initial void ratio | 1 |
 Filling rate (m/h) | 0.5 |
 Filling strategy | 2-stages with 1-day plug |
Rock mass | |
 Density (kg/m3) | 2500 |
 Young’s modulus (GPa) | 30 |
 Poisson’s ratio | 0.3 |
 Thermal conductivity (W/m·K) | 3.9 |
 Heat capacity (J/Kg·K) | 790 |
Mechanical component | |
 Top surface | Free |
 Lateral sides | Roller |
 Bottom side | Fixed |
 Volume force | Gravity |
Hydraulic component | |
 Surrounding surfaces | No flow |
 Volume force | Gravity |
 Initial value | Hydraulic head = 0 |
Thermal component | |
 Surrounding surfaces (°C) | 25 |
 Initial temp. (°C) | 25 |