MODELING ALTERATION OF THERMAL DROP OF VENTILATION PRESSURE AND ITS EFFECTS ON MINE WORKING VENTILATION

Abstract


Topicality of the theoretical study results is determined by a need to develop, correct and improve the methods to forecast changes in air distribution and parameters of mine air in case of emergency. An analysis is made of relation between aerological and thermalphysic processes in mine workings. It is shown that the link between them is in thermal drop of ventilation pressure which influence on ventilation grows during mine emergency leading to fire and the main fan unit failure. Alteration of thermodynamic properties of air flow under gravitational contraction and stack effect in shafts was modeled. A solution is given to the problem of coupled heat transfer of ventilation air with rock mass using the short-time approximation, allowing forecast of thermal drops of ventilation pressure during the fire. The results of numerical simulation of air movement evolution inside the inclined shafts during the fire of different scale are presented. The results of mathematical simulation of aero- and thermal-gas-dynamic processes occurring in emergency ventilation mode lay foundation for development of a complex of measures aimed at emergency prevention and real-time emergency ventilation control.


About the authors

A. V Shalimov

Mining Institute of the Ural Branch of the Russian Academy of Sciences

Author for correspondence.
Email: shalimovav@mail.ru

D. S Kormshchikov

Mining Institute of the Ural Branch of the Russian Academy of Sciences

Email: dkormshchikov@gmail.com

R. R Gazizullin

Mining Institute of the Ural Branch of the Russian Academy of Sciences

Email: aero_rus@mail.ru

M. A Semin

Mining Institute of the Ural Branch of the Russian Academy of Sciences

Email: mishkasemin@gmail.com

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Copyright (c) 2014 Shalimov A.V., Kormshchikov D.S., Gazizullin R.R., Semin M.A.

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