Aerodynamic control in open pit gold mining

The study is aimed at the aerodynamic analysis of ventilation implemented in an open pit gold mine using underground mine excavations. The current method and means of deep open pit mine ventilation are reviewed. The natural airing efficiency decreases with an increasing depth of an open pit mine. Air recirculation zones arise within the pit space, and pollutants accumulate in these zones. The conclusion is drawn on the advisability of integrated natural/artificial ventilation using specially driven underground openings. The research task is set to validate an efficient ventilation method for deep open pit gold mines in the North. The methodology is proposed for selecting the integrated ventilation design for deep open pits. The computer models of geometry and aerodynamics of a representative open pit gold mine are constructed for studying air flow velocities. The Ansys-Fluent-based mathematical modeling of aerodynamic processes is performed for the cases of natural ventilation and integrated ventilation with forced air feed to the pit space from the system of underground openings. The artificial ventilation efficiency is assessed. When air is fed at the total flow rate of 60 m3 at the velocity of 2 m/s along five drifts aerodynamically connected with the pit space, configuration of the air recirculation zones is considerably changed, and the volumes of these zones are greatly decreased. The further research objectives are formulated.

Keywords: aerodynamics, open pit mine, gold mine, artificial ventilation, mathematical modeling, underground mine openings, natural ventilation, air velocities, recirculation zones, pollutants.
For citation:

Gendler S. G., Borisovsky I. A. Aerodynamic control in open pit gold mining. MIAB. Mining Inf. Anal. Bull. 2021;(2):99-107. [In Russ]. DOI: 10.25018/0236-1493-20212-0-99-107.

Acknowledgements:
Issue number: 2
Year: 2021
Page number: 99-107
ISBN: 0236-1493
UDK: 622.4
DOI: 10.25018/0236-1493-2021-2-0-99-107
Article receipt date: 16.09.2020
Date of review receipt: 10.11.2020
Date of the editorial board′s decision on the article′s publishing: 10.01.2021
About authors:

S.G. Gendler1, Dr. Sci. (Eng.), Professor, e-mail: sgendler@mail.ru,
I.A. Borisovsky1, Graduate Student,
1 Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia.

 

For contacts:

S.G. Gendler, e-mail: sgendler@mail.ru.

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