ESTIMATION OF FIRE-RELATED PARAMETERS IN TUNNELS FROM ANALYTICAL MODELING OF WARM ADVECTION

The article presents the analytical research data on the convective motion dynamics and air temperature variation in a mine tunnel after cutoff of a drag source during fire. The single-valued prediction is only possible based on the stability theory of convection currents. The mathematical modeling...

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Published in:Journal of mining science 2020-11, Vol.56 (6), p.1040-1045
Main Authors: Kazakov, B. P., Shalimov, A. V., Grishin, E. L., Kormshchikov, D. S.
Format: Article
Language:English
Subjects:
Advection
Aerodynamics
Air flow
Air temperature
Burning
Burning time
Computational fluid dynamics
Convection
Convection currents
Drag
Earth and Environmental Science
Earth Sciences
Fires
Flow velocity
Fluid flow
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Mathematical models
Mineral Resources
Mining Thermophysics
Modelling
Parameter estimation
Stability
Tunnels
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cited_by cdi_FETCH-LOGICAL-c389t-d87437555ac0c74e68db0d4c8d4e786dc62b7175f05161cfedde346d54237ad73
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creator Kazakov, B. P.
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description The article presents the analytical research data on the convective motion dynamics and air temperature variation in a mine tunnel after cutoff of a drag source during fire. The single-valued prediction is only possible based on the stability theory of convection currents. The mathematical modeling of advection currents of counter air flows in a tunnel is performed at longitudinal gradient of temperature. The analytical formulas are obtained to calculate advection vortex and air flow velocity in vortex as function of burning time and temperature at the source. The range of hot airflow weakly depends on the burning temperature, insignificantly grows within a day and makes 850 m at the temperature of 1000°C. The developed procedure allows evaluating the fire size and duration, as well as the air flow velocities in tunnels after the drag source cutoff.
doi_str_mv 10.1134/S1062739120060162
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subjects Advection
Aerodynamics
Air flow
Air temperature
Burning
Burning time
Computational fluid dynamics
Convection
Convection currents
Drag
Earth and Environmental Science
Earth Sciences
Fires
Flow velocity
Fluid flow
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Mathematical models
Mineral Resources
Mining Thermophysics
Modelling
Parameter estimation
Stability
Tunnels
title ESTIMATION OF FIRE-RELATED PARAMETERS IN TUNNELS FROM ANALYTICAL MODELING OF WARM ADVECTION
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