OFFICIAL Bulk – 70% Emulsion Blend 40 1100 2100 0.31 - ANFO 40 1270 1894 0.244 0.415 Air 20 COMSOL In-built - Scenarios Three scenarios were investigated: 1) an open hole, to understand the impact of ambient air convection on temperature measurements essential to deciding if a hole is safe to load. 2) a hole loaded with ANFO to understand the impact a porous explosive will have on heat dissipation and the temperature over time. 3) a hole loaded with a pumped emulsion blend/ANFO blend to understand the impact of a solid explosive will have on the heat dissipation and temperature over time Figure 8 illustrates the scenarios and heat transfer regimes applied. Figure 11: Cross section illustration of the 3D model showing the heat transfer regimes of the three scenarios modelled, open air, traditional pumped emulsion explosive and ANFO.
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