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Convective Flows in Superdeep Quarries

#0795


Investigation of Convective Flows of Heterogeneous Mixtures in Superdeep Quarries

Tech Area / Field

  • ENV-APC/Air Pollution and Control/Environment

Status
3 Approved without Funding

Registration date
11.11.1995

Leading Institute
VNIITF, Russia, Chelyabinsk reg., Snezhinsk

Supporting institutes

  • Chelyabinsk State University, Russia, Chelyabinsk reg., Chelyabinsk

Project summary

Intensification of mining works, particularly in opened quarries, results in intensification of the sources of pollution of quarry atmosphere: explosive works, loading engineering, vehicle, conveyor lifts and other.

Creation of an artificial microclimate in cabins of mountain and transport equipment partially reduces the acuteness of the problem, but does not exclude necessity of periodical interruption of technological process to ventilate quarry. This process is strongly complicated in wintertime, when water is in a crystalline state (snow, ice).

The main way is quarry ventilation by means of artificial thermics. However, by now there is no mathematical model, which describes adequately convective flow of heterogeneous multiphase atmosphere inside quarry, when transition from laminar to turbulent flow takes place as so as phase transitions in components (water-ice).

The contents of given proposals is determination of the most effective conditions of application of ways of quarry ventilation, i.e. removal from its volume of a mixture of air, water pair, exhaust gases of quarry vehicle and particles of dust formed after rock explosions. The complex approach to the solution of formulated problem, combining mathematical and physical simulation of convective flows four-phase heterogeneous mixture is proposed.


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