Mining Institute, Ural Branch, Russian Academy of Sciences (Perm, Russia)
M. A. Semin, Head of Laboratory, Doctor of Engineering Sciences, seminma@inbox.ru
E. V. Kolesov, Researcher, Candidate of Engineering Sciences
M. D. Popov, Researcher, Candidate of Engineering Sciences
R. D. Luzin, Engineer
The paper examines methodological aspects of developing and parameterizing threedimensional mathematical models of open pit mine ventilation, using the complex system of open-pit operations at the Pioneer deposit as a case study, which includes multiple pits and waste dumps. An approach is proposed for defining the geometric parameters of the computational domain, specifying boundary conditions, and selecting turbulence models to adequately simulate unsteady gas-air flow dynamics in the atmospheric boundary layer and within pit spaces. Procedures for calibration and validation of the CFD model based on field observations and experimental measurements of gas-air mixture parameters are discussed. As key indicative metrics, it is proposed to use the limiting depth of natural ventilation in open pits and matrices of correlation coefficients characterizing air-gas flow interactions between open-pits. Based on these indicators, an analysis of velocity fields and temporal patterns of pollutant dispersion is carried out, along with mapping of poorly ventilated areas. The results obtained provide a foundation for the further development and assessment of engineering measures aimed at enhancing ventilation in deep open pits.
The study was carried out with financial support from the Ministry of Science and Higher Education of the Russian Federation under state assignment (No. 126012716039–2).
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