Thermal Processes in Deep Mine Ventilation Shafts in Case of Airflow Reversal in Cold Seasons
M. A. Semin, N. A. Knyazev, D. S. Kormshchikov
Mining Institute, Ural Branch, Russian Academy of Sciences, Perm, 614007 Russia
Keywords: Mine ventilation, reversal ventilation, ventilation shaft, heat transfer coefficient, modeling, thermal processes, experimental research
Abstract
The spotlight is on reversal ventilation in a mine in case of an accident in winter. The inlet of cold air in underground openings endanger the health of miners, and mining equipment suffers from an adverse effect of negative temperatures. In compensatory measures design, the source data is the potentially transient distribution of mine air temperature after airflow reversal. The procedure of air temperature pattern in ventilation shaft during airflow reversal involves mathematical modeling of transient thermal processes in the shaft and in adjacent rock mass. The correct choice of the heat transfer coefficient between the shaft lining and air results from the comparison of the modeling results and the experimental data on the air temperature dynamics in planned airflow reversal.
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