Authors: M.M. Aliev, E.A. Sozontova

Title of the article: Unified method for taking into account the anisotropy of rock strength

Year: 2025, Issue: 3, Pages: 110-118

Branch of knowledge: 2.8.6. Geomechanics, destruction of rocks by explosion, mine aerogasdynamics and mining thermophysics

Index UDK: 622.2

DOI: 10.26730/1999-4125-2025-3-110-118

Abstract: Relevance of the work. Anisotropic rocks, which have different mechanical properties in different directions, require a large number of experimental samples to determine their properties. The absence of the required amount of core material extracted from wells and the production of twin samples in this case is practically impossible. Thus, the development of a unified method for taking into account the anisotropy of rocks proposed by the approach in this work is an urgent task. Purpose of the work: to consider an approach to determining the limiting stress state leading to the destruction of anisotropic rock, where the results of uniaxial compression tests at various angles relative to the axis of a full-size core will be used. If it is not possible to obtain twin samples, the number of tests can be reduced to a minimum (4 tests). Research methods: using the generalized Coulomb-Mohr criterion for the anisotropy of rocks, the strength characteristics during shear along and across layers in the form of adhesion and the angle of internal friction are determined. Also, from the linear strength criterion for anisotropic rocks, it is theoretically possible to calculate the values ​​of the ultimate stresses during volumetric compression at various angles to the direction of bedding. Results: the initial parameters are taken to be the strength limits, adhesion and angle of internal friction in different directions of layering. Tensile strength at various angles can also be determined by calculation if test results determined by simple tensile or Brazilian test are not available.

Key words: layering anisotropy rocks geomechanical model stress state strength criterion Coulomb-Mohr criterion

Receiving date: 14.10.2024

Approval date: 10.06.2025

Publication date: 26.06.2025

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