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ArticleName Stress–strain determination in Oktyabrsky Mine SS-1 skip shaft area by overcoring
DOI 10.17580/gzh.2024.03.04
ArticleAuthor Marysyuk V. P., Trofimov A. V., Kirkin A. P., Shutov A. A.

NorNickel’s Polar Division, Norilsk, Russia

V. P. Marysyuk, Chief Geotechnical Engineer—Director, Center for Geodynamic Safety, Candidate of Engineering Sciences


Geotechnique Laboratory, Gipronickel Institute, Saint-Petersburg, Russia
A. V. Trofimov, Head, Candidate of Engineering Sciences,
A. P. Kirkin, Researcher, Candidate of Engineering Sciences
A. A. Shutov, Leading Engineer


The growing depth of underground mineral mining calls for the integrated research, including geomechanical numerical modeling for the analysis of structure and lithology of enclosing rock mass. The quality modeling needs knowing the in-situ stress–strain behavior of intact rock mass. Currently there are many various methods of the stress–strain analysis and determination of stress influence zones in rock mass. The methods differ in the amount of financial and labor inputs, as well as in the accuracy and objectiveness of the data obtained. It should be taken into account that alongside direct in-situ measurements of stresses and strains in rock mass, the research should include special-purpose post-fieldwork laboratory testing of cores, as well as the pre-fieldwork analysis of structural–lithological, geomechanical and numerical models to validate correctness of the measurement procedure parameters. The authors describe the results of the in-situ stress–strain determination by the method of overcoring in the field of Oktyabrsky Mine, in the area of underground crushing facilities of SS-1 skip shaft. The measurements were taken using 12-channel digital extensometers CSIRO HID Cells capable to determine components of the full stress tensor in a single measurement taken in a single borehole. It is found that the stress field is gravitational in the test area of rock mass, but the resultant values of the subhorizontal intermediate and minimal stresses are rather high and exceed the calculations as per the Dinnik hypothesis.

keywords Rocks, testing procedure, samples, lithology, overcoring, stresses, strains, stress sensors

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