According to the data of the remote inductive sensing method obtained in 2017–2023, a correlation and regression analysis of the dependence at a frequency of 1,125 MHz of the effective values of the characteristics of the electrophysical properties of South Yakutia sandstones composing the annual heat turnover layer of the base of engineering structures in Neryungri was performed. It has been established that the growth of large values of electrical resistance of strongly slightly fractured sandstones at a distance of 40 m (depth 5–14 m) leads to a regular linear increase in lower average values of electrical resistance of seasonally frozen weathered sandstones at a distance of 5 m (depth 0–5 m). A nonlinear increase in lower average values is observed for the dielectric constant of fractured sandstones in comparison with the increase in high permeability values of weathered sandstones. This reciprocal process is mathematically described in the reverse regression order by the equations of linear and exponential functions. The application of these equations makes it possible to solve the problem of predicting the average values of electrical resistance and dielectric constant of fractured sandstones based on known a priori values of the same electrophysical characteristics of weathered sandstones. The random spread of forecast errors with a confidence probability of 70 % acceptable for methods of terrestrial geophysics is small. For electrical resistance, the error spread is ±27,6 %, and for dielectric constant — ±16,7 %. The obtained regression equations expand the technical and operational capabilities and increase the geological and economic efficiency of the remote inductive sensing method in the built-up areas of South Yakutia.

Leonid G. Neradovskii
Doctor of Technical Sciences
Senior Researcher at the Laboratory of Engineering Geocryology
Melnikov Permafrost Institute SB RAS
36, Merzlotnaya Str., Yakutsk, 677010, Russia
е-mail: leoner@mpi.ysn.ru
Scopus ID: 57201729984
SPIN-code: 3296-2473
AuthorID: 394470

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