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SUBSTANTIATION OF THERMAL REGIME DURING CONSTRUCTION OF UNDERGROUND COMPLEXES FOR NUCLEAR POWER OF THE ARCTIC REGION

В. Г. Николаев, Aleksandr O. Orlov, V. K. Burkov, Yurii Smirnov

First published: 2020-09-20https://doi.org/10.5593/sgem2020/1.1/s02.092View metrics

Abstract

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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Publication details

Title
SUBSTANTIATION OF THERMAL REGIME DURING CONSTRUCTION OF UNDERGROUND COMPLEXES FOR NUCLEAR POWER OF THE ARCTIC REGION
Authors
В. Г. Николаев, Aleksandr O. Orlov, V. K. Burkov, Yurii Smirnov
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th SGEM International Multidisciplinary Scientific GeoConference Proceedings 2020, Science and Technologies in Geology, Exploration And Mining
Publisher
STEF92 Technology
Year
2020
Pages
755-762
SWS Citekey
Nikolaev20202755762
ISSN
1314-2704
ISBN
978-619-7603-04-0
Language
en
Publication type
Conference Paper
Keywords
underground complexmining workingpermafrosttemperature fieldsmall power nuclear plant
References9

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  2. . Melnikov N.N., Gushchin V.V., Konukhin V.P., Naumov V.A. Underground nuclear power plants: safety analysis, conservation and technical and economic indicators of construction. - Apatity: KSC RAS USSR, 1989 - 130 p.

  3. . Shuvalov Yu.V., Galkin A.F. Theory and practice of optimal control of the thermal regime of underground structures of the permafrost zone // Mining Information and Analytical Bulletin. - 2010. - No. 8. – Pp. 365-370.

  4. Khokholov Yu.A. Mathematical modeling of heat transfer processes in underground excavations of the permafrost zone // Mining Information and Analytical Bulletin. - 2005. –№ 1. T.12 - Pp.102-110.

  5. . Galkin A.F. Improving the stability of mine excavations in the permafrost zone // Notes of the Mining Institute. - 2014.– T. 207. - S.99-102.

  6. . Pavlov, A.R. Mathematical model and computer calculation algorithms for heat and mass transfer during freezing of the ground / A.R. Pavlov, P.P. Permyakov .// Engineering Physics Journal. 1983.V.44. N2 2.- 311-316.

  7. . Samarsky A.A. Computational heat transfer A.A. Samarsky, P.N. Vabishchevich M .: URSS editorial, 2003.-784 p.

  8. . Anderson D.M. Physics, Chemistry, and Mechanics of frozen ground / Anderson D.M., Morgenctem N.R. Permafrost, North American Contribution, Second International Conference.- Wachington, 1973. Pp. 257-288.

  9. . https://www.ansys.com/

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