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Vol. 27 (2024 year), No. 1, DOI: 10.21443/1560-9278-2024-27-1
The analysis of the conditions and limitations of using the Lichtenecker and Lichtenecker – Asaad models for predictive assessment of the effective thermal conductivity of rocks have been carried out. For a comparative assessment, experimental data on the thermal conductivity of carbonate rocks (limestone, dolomite) from the South-West German Molasse basin, the Chicxulub impact structure (Yucatan Peninsula, Mexico) and the Bazhenov Formation (Western Siberia, Russia) have been considered. Comparative assessments were carried out based on the use of correlation relationships obtained by the authors of experimental works as a result of regression analysis of the petrophysical properties of carbonate rocks. The results of the computational and analytical assessment have shown that the highest accuracy of thermal conductivity prediction using the Lichtenecker – Asaad model can be achieved if experimental data are available that provide a highly accurate determination of the structure factor. The features of the influence of various parameters of the Lichtenecker – Asaad model on the error in estimating the effective thermal conductivity of the rock have been studied. It has been established that at the stage of pre-design research, the Lichtenecker model can be used for a fairly correct theoretical assessment of the thermal conductivity of water-saturated, slightly porous rocks.
(in Russian, стр.9, fig. 7, tables. 1, ref 16, AdobePDF, AdobePDF 0 Kb)
Vol. 28 (2025 year), No. 1, DOI: 10.21443/1560-9278-2025-28-1
Gusak S. A.
Assessment of the effect of temperature on the physical and technical properties of rocks
The physical properties of petrographic varieties of granitoids of the Kola Peninsula have been considered. Experimental data on the mineral composition and physical properties of rocks (density, elastic modulus, Poisson's ratio, compressive strength, longitudinal wave velocity) that make up the rock complexes of the Murmansk block – granodiorite and alaskite granite – have been presented. To assess the thermophysical properties of rocks under normal thermodynamic conditions, the relationships between the parameters of the properties and their mineral composition have been used. Based on this approach and the temperature dependence of the properties of rock-forming minerals, a theoretical assessment of the effect of the thermal factor on the physical properties of granitoids (thermal conductivity, specific heat capacity, elastic modulus, coefficient of linear thermal expansion) have been carried out. The results of predicting changes in rock properties under elevated temperatures in the range from 20 to 100 °C have been presented.
(in Russian, стр.11, fig. 4, tables. 5, ref 21, AdobePDF, AdobePDF 0 Kb)