Open AccessOn the Calculation of Recirculating Scheme of Quarry Ventilation
Author(s) -
Старостин,
I. Starostin
Publication year - 2015
Publication title -
bezopasnostʹ v tehnosfere
Language(s) - English
Resource type - Journals
ISSN - 1998-071X
DOI - 10.12737/11877
Subject(s) - ventilation (architecture) , aerodynamics , volume (thermodynamics) , current (fluid) , basis (linear algebra) , environmental science , scheme (mathematics) , boundary (topology) , mechanics , marine engineering , engineering , mathematics , geometry , mechanical engineering , mathematical analysis , physics , thermodynamics , electrical engineering
A recirculating scheme of quarry ventilation has been examined. A calculation of the recirculating scheme of a quarry gas interchange employing Karman´s integral method, allowing to account for the parameters of the developed cavity (the angles of leeward and windward sides, their configuration, the size of the bottom, etc.), using the geometry function of the quarry, has been referred. Analytical dependencies for calculation of aerodynamic parameters of the recirculating ventilation scheme (air currents velocity, limits of the boundary layer, circulating air volume, etc.) have been determined. The proposed calculation method allows evaluating the natural state of gas interchange in quarries at various stages of mining operations, which is the basis for the estimation of atmospheric pollution and the development of necessary ventilation techniques.