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Title: SUBSTANTIATION OF THERMAL REGIME DURING CONSTRUCTION OF UNDERGROUND COMPLEXES FOR NUCLEAR POWER OF THE ARCTIC REGION
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SUBSTANTIATION OF THERMAL REGIME DURING CONSTRUCTION OF UNDERGROUND COMPLEXES FOR NUCLEAR POWER OF THE ARCTIC REGION
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1314-2704
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English
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20
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The aim of the work is to create methodological provisions to justify the safe parameters of the thermal regime in permafrost rocks during the construction of underground complexes of small power nuclear plants in the Arctic region. The idea of the study is to assess the thermal regime of long-span mining excavations using mathematical modeling methods. To ensure the stability of underground mine excavations at the construction stage in the permafrost, the authors verify the use of various heat-protective systems. As the main stabilizing measures, heat insulation, artificial cooling and freezing of rocks can be noted. Separate results of experimental studies of increasing the stability of mine excavations in the permafrost zone at low positive temperatures are presented. The paper considers problems of determining the parameters of the temperature field around the excavations of an underground complex of various cross sections at the construction stage. Mathematical models of heat transfer in frozen rocks have been developed. The equation of energy transfer in a porous medium includes energy transfer by conduction and convection methods in proportion to the content of solid and liquid parts in the medium in accordance with the porosity of the medium. Modeling of thermal processes in rocks as porous media filled with water with a phase transition allowed the authors to create virtual computing stands where it is possible to work out thermal conditions during the construction of mine excavations of various sections under permafrost conditions. An analysis of the results of a series of computational experiments made it possible to justify the time factor during which it becomes possible to carry out construction mining of underground complexes without the use of special measures to cool rocks and prevent their defrosting.
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conference
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20th International Multidisciplinary Scientific GeoConference SGEM 2020
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20th International Multidisciplinary Scientific GeoConference SGEM 2020, 18 - 24 August, 2020
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Proceedings Paper
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STEF92 Technology
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International Multidisciplinary Scientific GeoConference-SGEM
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SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts & Letters; Acad Fine Arts Zagreb Croatia; C
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755-762
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18 - 24 August, 2020
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website
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cdrom
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6809
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underground complex; mining working; permafrost; temperature field; small power nuclear plant
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