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Video 1 displays a 3-hour transient simulation of air exchange, presented across 180 frames with a one-minute interval. The inflow rate into the mine approximates 16 kg/s. Notably, the natural ventilation doesn’t sufficiently reach the lower part of the mine, thus suggesting the need to add forced ventilation.

Video 2 showcases the same 3-hour transient scenario, incorporating an additional forced ventilation of around 6 kg/s, positioned at the mine’s lowermost point, which ensures optimized air exchange within the tunnels.