Science and technological developments: article

ELECTRICAL RESISTIVITY OF ROCKS AS A SENSITIVE SENSOR OF CHANGES IN THEIR STRESS STATE AND DEFORMATIONS
A.Y. SIDORIN
Schmidt Institute of Physics of the Earth of the RAS
Journal: Science and technological developments
Tome: 99
Number: 2
Year: 2020
Pages: 38-48
UDK: 550.837
DOI: 10.21455/std2020.2-3
Аnnotation file
Bibliographic list
Keywords: rocks, electrical resistance, strain-sensitivity coefficient, review, laboratory experiments, field observations, monitoring to search for precursors of earthquakes and rock bursts, anisotropic changes
Аnnotation: 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.