Correlation of strength and electrophysical characteristics of coal-bearing sedimentary rocks in South Yakutia in Neryungri

№3 (2026)

Neradovskii L.G.

УДК 550.372+552.08
https://doi.org/10.47148/1609-364X-2026-3-113-126

AbstractAbout the AuthorsReferences
In Neryungri, according to the data of the remote inductive sounding method, the correlation relationships of strength at a frequency of 1,125 MHz and the effective values of the electrophysical characteristics of the coal-bearing sedimentary rock layer at a frequency of 0,281 MHz were studied at a depth of 6–18 m. In the space of single values, a high correlation is observed between strength and the average azimuthal specific attenuation of the harmonic field of a vertical magnetic dipole. In the space of background values, which is ordered by microdistricts in Neryungri and is free of random interference, there are additional high and moderate correlations between strength, electrical resistance, dielectric constant, anisotropy coefficient, and anisotropy azimuth. In this chain of regular statistical interdependencies, there is an extensive system of functional cause-and-effect relationships between the strength and electrophysical characteristics of sedimentary rocks at different hierarchical levels. This fact significantly expands the engineering and geological capabilities of the remote inductive sensing method in solving various forecasting and modeling tasks in the direction of assessing the strength of sedimentary rocks based on their electrophysical characteristics or in the opposite direction.

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

1. Prozorova G.V., Senkevich L.B. On the Use of Large Language Models in Applied Tasks of the Oil and Gas Industry. Geoinformatics. 2025;(4):103–112. DOI: 1047148/1609-364X-2025-4-103-112.
2. Krichinsky A.K., Pospeev A.V. Integration of Artificial Intelligence into Geological and Geophysical Data Processing in Solid Minerals Exploration. Earth Sciences and Subsoil Use. 2025;48(3):310–320. DOI: 10.21285/2686-9993-2025-48-3-1-11.
3. Akimov A.T. Voprosy teorii i praktiki ehlektrorazvedki merzlykh porod [Theoretical and practical issues of electrical exploration of permafrost]. In: Geofizicheskie metody issledovanii pri izyskaniyakh v stroitel’stve (Trudy PNIIIS Gosstroya RSFSR. T. 6). Moscow: Gosstroi SSSR; 1971. pp.  6–73.
4. Zheleznyak M.N. Geotemperaturnoe pole i kriolitozona Yugo-Vostoka Sibirskoi platformy [Geotemperature field and permafrost in the southeastern Siberian Platform]. Novosibirsk: Nauka; 2015. 227 p.
5. Sysolyatin R.G., Zheleznyak M.N. Geocryological Conditions of the Tokarikhan and Guvilgra Grabens (South Yakutia). Arctic and Subarctic Natural Resources. 2023;28(2):261–274. DOI: 10.31242/2618-9712-2023-28-2-261-274.
6. Kudryavtsev V.A. (ed.) Yuzhnaya Yakutiya: merzlotno-gidrogeologicheskie i inzhenerno-geologicheskie usloviya Aldanskogo gornopromyshlennogo raiona [Southern Yakutia: permafrost-hydrogeological and engineering-geological conditions of the Aldan mining region]. Moscow: MGU; 1975. 444 p.
7. Zhelinskii V.M. Mezozoiskaya uglenosnaya formatsiya Yuzhnoi Yakutii [Mesozoic coal-bearing formation of South Yakutia]. Novosibirsk: Nauka; 1980. 119 p.
8. Grib N.N., Samokhin A.V. Fiziko-mekhanicheskie svoistva uglevmeshchayushchikh porod Yuzhno-Yakutskogo basseina [Physical and mechanical properties of carbon-bearing rocks of the South Yakut basin]. Novosibirsk: Nauka; 1999. 240 p.
9. Mokshantsev K.B., Gornshtein D.K., Gusev G.S. et al. Tektonicheskoe stroenie Yakutskoi ASSR [The tectonic structure of the Yakut ASSR]. Moscow: Nauka; 1964. 240 p.
10. Buldovich S.N., Melent’ev V.S., Naumov M.S., Furikevich O.S. Rol’ noveishikh razryvnykh narushenii v formirovanii merzlotno-gidrogeologicheskikh uslovii (na primere Neryungrinskoi sinklinali Yuzhno-Yakutskogo mezozoiskogo progiba) [The role of recent faults in the formation of permafrost-hydrogeological conditions (an example of the Neryungri syncline of the Southern Yakutsian Mesozoic trough)]. In: Merzlotnye issledovaniya. Iss. 15. Moscow: MGU; 1976. pp. 120–125.
11. Shesternev D.M. Kriogipergenez i geotekhnicheskie svoistv porod kriolitozony [Cryohypergenesis and geotechnical properties of cryolithozone rocks]. Novosibirsk: SO RAN; 2001. 266 p.
12. GOST 25100–2020. Grunty. Klassifikatsiya [GOST 25100–2020. Soils. Classification]. Moscow: Standartinform; 2020. 38 p.
13. GOST 21135.2-84. Porody gornye. Metody opredeleniya predela prochnosti pri odnoosnom szhatii [National Standard 21135.2-84. Rocks. Methods for determination of axial compression strength]. Moscow: Izdatel’stvo standartov; 1984. 7 p.
14. Neradovskii L.G. A Probabilistic Model for Predicting Sandstone Strength Using Electromagnetic Induction Sounding in the Southern Yakutian Permafrost Region: A Case Study in Neryungri. Kriosfera Zemli. 2022;26(6):43–57. DOI: 10.15372/KZ20220605.
15. Kompleks srednechastotnoi apparatury ehlektromagnitnogo zondirovaniya (SEHMZ). Tekhnicheskoe opisanie [The system for medium-frequency electromagnetic sounding (SEMZ). Technical specification]. Krasnoyarsk: NPO Sibtsvetmetavtomatika SSSR; 1991. 30 p.
16. Neradovskii L.G. Geological and Geophysical Assessments of the Strength of Sandstones of South Yakutia at the Foundation of Engineering Structures of the City of Neryungri. Journal of Geophysics. 2024;(4):70–77. DOI 10.34926/geo.2024.32.50.010.
17. Neradovskii L.G. Electrical Resistance and Dielectric Permittivity of Sandstones of South Yakutia at the Base of Engineering Structures in Neryungri (Part 1). Geoinformatika. 2025;(2):42–52. DOI: 10.47148/1609-364X-2025-2-42-52.
18. Kulaichev A.P. Metody i sredstva kompleksnogo analiza dannykh [Methods and tools for integrated data analysis]. Moscow: FORUM. INFRA-M; 2006. 512 p.
19. Borovikov V.P. Populyarnoe vvedenie v sovremennyi analiz dannykh i mashinnoe obuchenie na Statistica [A Popular Introduction to Modern Data Analysis and Machine Learning in Statistica]. Moscow: Goryachaya liniya – Telekom; 2024. 354 p.
20. Bernoulli J. O zakone bol’shih chisel [On the law of large numbers]. Translated from Latin. Moscow: Nauka; 1986. 176 p.
21. Bobachev A.A., Bol’shakov D.K., Modin I.N., Musatov A.A., Pervago E.V., Shevnin V.A., Akulenko S.A., Erokhin S.A., Pavlova A.M. Izuchenie anizotropii v metode soprotivlenii [Study of anisotropy in the resistance method]. Moscow: MGU; 2012. 248 p.
22. Gur’yanov I.E. Engineering Cryolithology: Strength of Perennially Frozen Soils. Novosibirsk: GEO; 2029. 139 p.
23. Kolomenskii N.V. Obshchaya metodika inzhenerno-geologicheskikh issledovanii: uchebnik dlya geologicheskikh spetsial’nostei vuzov [General methodology of engineering and geological research: textbook for geological specialties of universities]. Moscow: Nedra; 1968. 342 p.
24. GOST 20522–2012. Grunty. Metody statisticheskoi obrabotki rezul’tatov ispytanii [GOST 20522-2012. Soils. Methods of statistical processing of test results]. Moscow: Standartinform; 2013. 16 p.
25. Lebedev V.F., Onushchenko V.I., Litvintseva L.M. Kompleks SEhMZ. Metodicheskoe posobie [SEMZ system. A methodological guideline]. Krasnoyarsk: Sibtsvetmetavtomatika SSSR; 1991. 83 p.
26. Titlinov V.S., Zhuravleva R.B. Tekhnologiya distantsionnykh induktivnykh zondirovanii [Technology for distance inductive soundings]. Yekaterinburg: Nauka; 1995. 56 p.

Key words: Neryungri; coal-bearing sedimentary rocks; strength; electrical resistance; dielectric constant; specific attenuation; anisotropy coefficient and azimuth; correlation matrices.

Section: Practical application