Numerical methods for determining rock pressure in rocky and dispersed soils
https://doi.org/10.52170/1815-9265_2023_67_84
Abstract
This article discusses numerical methods for solving the problem of determining rock pressure using devices based on the finite element method and the so-called limit analysis method, which is currently becoming increasingly popular and is implemented in a number of software systems. Such popularity of the new method is explained by the fact that, unlike the finite element method in its classical sense, the equilibrium equations and the law of soil strength are implemented directly in the method of limit analysis. An important issue in carrying out any numerical calculations, both by the finite element method and by the method of limit analysis, is to determine the behavior model of the soil at the limit stage of work. If everything is relatively simple with the behavior of dispersed soils, in this case an ideal elastic-plastic model with the Mohr-Coulomb destruction criterion is used, the main characteristics of which are φ – the angle of internal friction of the soil and c – the specific adhesion of the soil, then questions arise with the behavior of rocky soils. In this paper, the Hoek-Brown criterion is adopted as the criterion of destruction, the main parameters of which are Rc – the strength limit of the soil for uniaxial compression. In addition, in this work, the results of numerical calculations were compared with the method of calculating rock pressure proposed by the authors in previously published articles. It was found that the results obtained during the finite element calculation give a qualitatively implausible picture. In addition, in this work, the equilibrium of the finite element model was checked.
About the Authors
Ya. O. Stakhnyov
Siberian Transport University
Russian Federation
Russian Federation
Yaroslav O. Stakhnyov – Postgraduate student of the Geotechnics, Tunnels and Subways Department
Novosibirsk
K. V. Korolev
Siberian Transport University
Russian Federation
Russian Federation
Konstantin V. Korolev – Head of the Geotechnics, Tunnels and Subways Department, Doctor of Engineering, Professor
Novosibirsk
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Review
For citations:
Stakhnyov Ya.O., Korolev K.V. Numerical methods for determining rock pressure in rocky and dispersed soils. Bulletin of Siberian State University of Transport. 2023;(4):84-91. (In Russ.) https://doi.org/10.52170/1815-9265_2023_67_84
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