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With three units of laboratory equipment (jaw and roller crushers, as well as rotary ore divider) operating simultaneously, numerical modeling research was performed to examine the effect of dust emission area on air pollution in a laboratory crushing room. The modeling was performed in a three-dimensional setting using the COMSOL program. The room ventilation process was modelled based on a previously developed two-stage methodological approach: calculation of aerodynamic parameters in the incompressible fluid ap...