ROLE OF THERMOPHYSICAL RESEARCH IN PROVIDING EFFICIENCY AND SAFETY OF MINE OPERATION IN PERMAFROST ZONE
C. M. Tkach, A. S. Kurilko, D. E. Solovyov
Mining Institute of the North, Siberian Branch, Russian Academy of Sciences, Yakutsk, Russia
Keywords: Permafrost, mines of the Russian North, mine workings, thermal regime, mathematical modeling
Abstract
The issues concerning the influence of temperature factor on safety and efficiency during the underground mining of mineral deposits in the areas with permafrost rocks are set forth. The features of mining operations and the formation of a thermal regime in alluvial mines of the permafrost zone have been determined. It is shown that the main requirement for regulating the thermal regime of a mine is to prevent thawing of dispersed rocks surrounding mine workings. The results of predictive calculations (by the method of mathematical modeling) of the temperature regime in air supply workings, as well as in enclosing rock mass of a designed alluvial mine, are presented. The results of mathematical modeling of the temperature regime of soils in the area of pile foundation of a tower-type drop hammer and the mouth of a vertical shaft are considered. Based on the results of numerical modeling, recommendations are given to organize automated control of soil temperature (horizontal wells) of the wellhead.
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