Способ количественного учета статических искажений по магнитному полю

ELECTRICAL RESISTIVITY OF ROCKS AS A SENSITIVE SENSOR OF CHANGES IN THEIR STRESS STATE AND DEFORMATIONS

A.Ya. Sidorin

Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia

e-mail: al_sidorin@hotmail.com

Highlights

– analysis of data on the results of laboratory studies of the strain-gauge sensitivity of the electrical resistance of rocks

– compiled a summary table of the values of the coefficient of strain sensitivity of various rocks and minerals

– the values of the coefficient of tensosensitivity can reach hundreds of thousands and even more

– in laboratory experiments and field observations, significant anisotropy of variations in the electrical resistance of rocks was revealed

– the high tensosensitivity of the electrical resistance of rocks was the basis for conducting unique geoelectric experiments to search for earthquake precursors

Abstract. The literature data on the results of laboratory studies of the strain-sensitivity of the electrical resistivity of rocks were collected and summarized. A summary of the data is presented in the form of a table of the values of the strain amplification coefficient for various rocks and minerals. The analysis of the collected data showed that the relative changes in the electrical resistivity of some rocks under certain conditions can be hundreds of thousands or even more than the relative deformations of the studied samples. In recent years, results have been obtained that indicate significant changes in the anisotropy of the electrical resistance of rocks in the process of their loading. These features of the electrical resistivity of rocks show the prospects for using geoelectric monitoring to obtain information on changes in the stress state and deformations of rocks and as a method for indirectly determining the permissible threshold for loading rocks, as well as in integrated geophysical monitoring systems when solving various applied problems.

Keywords: rocks, electrical resistance, strain-sensitivity coefficient, review, laboratory experiments, field observations, monitoring to search for precursors of earthquakes and rock bursts, anisotropic changes

Cite this article as: Sidorin A.Ya. Electrical resistivity of rocks as a sensitive sensor of changes in their stress state and deformations, Nauka i Tekhnologicheskie razrabotki (Science and Technological Developments), 2020, vol. 99, no. 2, pp. 38–48. [in Russian]. https://doi.org/10.21455/std2020.2-3

Funding

This study was performed under State Task of Schmidt Institute of Physics of the Earth RAS.

Ethics declarations

The author declares that there is no conflict of interest.

References

ELECTRICAL RESISTIVITY OF ROCKS AS A SENSITIVE SENSOR OF CHANGES IN THEIR STRESS STATE AND DEFORMATIONS

A.Ya. Sidorin

Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia

e-mail: al_sidorin@hotmail.com

Highlights

– analysis of data on the results of laboratory studies of the strain-gauge sensitivity of the electrical resistance of rocks

– compiled a summary table of the values of the coefficient of strain sensitivity of various rocks and minerals

– the values of the coefficient of tensosensitivity can reach hundreds of thousands and even more

– in laboratory experiments and field observations, significant anisotropy of variations in the electrical resistance of rocks was revealed

– the high tensosensitivity of the electrical resistance of rocks was the basis for conducting unique geoelectric experiments to search for earthquake precursors

Funding

This study was performed under State Task of Schmidt Institute of Physics of the Earth RAS.

Ethics declarations

The author declares that there is no conflict of interest.

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About the author

SIDORIN Alexander Yakovlevich – Schmidt Institute of Physics of the Earth of the RAS. Russia, 123242, Moscow, ul. Bolshaya Gruzinskaya 10, str. 1. E-mail: al_sidorin@hotmail.com