Continuum-Based Voronoi Tessellated Models for Capturing Unloading-Induced Brittle Damage in Hard Rocks

DOI

10.2991/978-94-6463-258-3_14How to use a DOI?

Keywords

Core damage; Unloading-induced stress path; Hard brittle rock; Voronoi Tessellated Model (VTM)

Abstract

The continuum numerical program RS2 was used to generate a Voronoi Tessellated Model (VTM), consisting of blocks meshed into several triangular elements and block boundaries simulated using joint elements. The RS2-VTM was calibrated to the compressive and tensile strengths of undamaged Lac du Bonnet (LdB) granite. The simulation results indicated a reasonable agreement between the peak strength and post-peak response of the RS2-VTM and those of LdB granite. Next, simplified 3D coring stress paths for horizontal and vertical boreholes at the 420 level of Canada's Underground Research Laboratory (URL) were applied to the calibrated RS2-VTM. The simulated core damage (i.e., yielded joint elements in RS2) was found to be comparable to that of discontinuum models. Finally, 2D and 3D stress paths experienced by the rock mass in the roof of the Mine-by Experiment (MBE) tunnel at the URL were applied to the calibrated RS2-VTM. It was found that the 3D stress path causes more damage compared to the 2D stress path due to the tensile stress generated ahead of the MBE tunnel face, which is not captured in 2D models.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Fatemeh Amiri
AU  - Navid Bahrani
PY  - 2023
DA  - 2023/11/08
TI  - Continuum-Based Voronoi Tessellated Models for Capturing Unloading-Induced Brittle Damage in Hard Rocks
BT  - Proceedings of the Rocscience International Conference  (RIC 2023)
PB  - Atlantis Press
SP  - 137
EP  - 145
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-258-3_14
DO  - 10.2991/978-94-6463-258-3_14
ID  - Amiri2023
ER  -