Table 1 Thermal properties of coal gangue and air.
Parameter | Symbol | Value | Unit |
|---|---|---|---|
Density of coal gangue29 | ρs | 2500 | kg/m3 |
Thermal conductivity of coal gangue | λs | 0.24 | W/(m·K) |
Specific heat capacity of coal gangue30 | Cs | 1450 | J/(kg·K) |
Coal gangue permeability | k | 1.32 × 10–6 | m2 |
The porosity of the coal gangue dump31 | e | 0.3 | - |
Density of air31 | ρg | 1.43 | kg/m3 |
Specific heat capacity of air31 | Cg | 1000 | J/(kg·K) |
Pre-factor | A | 180 | 1/s |
Activation energy | E | 5 × 104 | J/mol |
Gas constant30 | R | 8.314 | J/(mol·K) |
Aerodynamic viscosity coefficient | µ | 1.8 × 10–5 | kg/(m·s) |
Fluid diffusion coefficient29 | D | 1 × 10–5 | m2/s |
The thermal conductivity of air | λg | 0.026 | W/(m·K) |
Enthalpy change value of coal gangue29 | ΔH | 450 | kJ/mol |
Initial atmospheric pressure | P0 | 1 | atm |
