THERMAL SCIENCE

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Kai-Peng Zhu

STUDY ON THE MESOSCOPIC FAILURE PROCESS OF HETEROGENEOUS ROCK BASED ON THE 3-D GBM MODEL

ABSTRACT
The rock deformation and failure processes under uniaxial compression are a fundamental issue in rock mechanics. This study constructs a numerical heterogeneous rock specimen composed of Voronoi polyhedral particles using Neper software. It examines the fracture patterns, mechanical behavior, and strength of granular rock through numerical simulations using the 3-D distinct element code. The findings demonstrated that the number of cracks escalates with increasing axial stress. The rate of crack initiation rises significantly when the axial stress is approximately 57.3% of the peak stress, and shear cracks start to appear when the axial stress reaches 73.84% of the peak stress. These heterogeneous rock specimens exhibit significant axial splitting damage under uniaxial compression, transitioning from tensile to shear failure as the axial stress improves. In addition, smaller internal friction angles lead to more severe failures, and the more fully developed the shear zones are, the more pronounced the rock mass’s zonal fracturing becomes.
KEYWORDS
rock, Heterogeneity, GBM model, uniaxial compression, fracture
PAPER SUBMITTED: 2024-07-22
PAPER REVISED: 2024-10-18
PAPER ACCEPTED: 2024-11-25
PUBLISHED ONLINE: 2025-05-03
DOI REFERENCE: https://doi.org/10.2298/TSCI2502071Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2025, VOLUME 29, ISSUE Issue 2, PAGES [1071 - 1075]
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Study on the mesoscopic failure process of heterogeneous rock based on the 3-D GBM model

2025 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence