OFFICIAL Figure 10:Global Dimensions and geometry, in 3D, used as the basis for all simulations in COMSOL. Showing the 9 m deep hole, 0.229 m blasthole diameter, and 1 m deep, 2 m wide coal seam. Rock densities and thermal properties were sourced from literature or internal data as summarised in Table 2. Table 4: Thermal Properties and initial temperatures Material TInitial ( oC) Density, ρ (kg/m3) Heat Capacity, Cp (J/kgK) Thermal Conductivit y, k (W/mK) Porosity ε Coal 70 - (Kostúr, 2018) 1500 1000 0.4 - Ground 25 (Hassanvand, 2020) 2400 875 2 -
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