Engineering Geology World, Vol. ХIХ, No. 2/2024
Naumov M.A., Fomenko I.K., Gorobtsov D.N.
Naumov M.A., Fomenko I.K., Gorobtsov D.N., 2024. Mathematical modeling of the soil thawing depth due to the water impact in the storage pond. Engineering Geology World, Vol. ХIХ, No. 2, pp. 64–75, https://doi.org/10.25296/1993-5056-2024-19-2-64-75.
Thermophysical modeling is an essential part of the design process in permafrost regions. Today, these types of calculations are well-studied and are implemented by various software packages using numerical methods. When constructing fuel and energy facilities, it is mandatory to carry out these calculations throughout the entire lifespan of the facility. The paper presents the results of studies on the state of permafrost under a bucket-type intake structure near the Tas-Yuryakh River (Eastern part of the Srednebotuobinskoye oil, gas and condensate field). Mathematical modeling of soil thaw depth at the base of the structure due to the heating effect of the water was carried out using the Temp/W software from the GeoStudio package, which employs the finite element method. The forecast for the remaining service life of the structure was based on studies of temperature changes in the reservoir and on the surface of the soil. When solving geocryological problems, setting boundary conditions is essential. Numerous methods have been developed to adequately specify the upper boundary condition of the model. Much less attention has been paid to specifying the lower boundary condition, despite its significant influence on the calculation results. When the thermal influence from the structure approaches the lower boundary of the model, the results become inaccurate. The relevance of this work lies in analyzing the results of determining the thawing depth, depending on the variability of the lower boundary condition in the model. Based on the analysis, conclusions are drawn about the required input data set for an objective solution to this problem.
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MIKHAIL A. NAUMOV*
Sergo Ordzhonikidze Russian State University for Geological Prospecting; Moscow, Russia; naumovma@mgri.ru
Address: Bld. 23, Miklouho-Maclay St., 117997, Moscow, Russia
IGOR K. FOMENKO
Sergo Ordzhonikidze Russian State University for Geological Prospecting; Moscow, Russia; ifolga@gmail.com
DENIS N. GOROBTSOV
Sergo Ordzhonikidze Russian State University for Geological Prospecting; Moscow, Russia; gorobtsovdn@mgri.com