Block stability analysis considering depth-dependent damage on bedding planes due to blasting

DOI

10.2991/978-94-6463-398-6_70How to use a DOI?

Keywords

rock mechanics; block theory; slope stability; bedding plane

Abstract

The study presents a case study on the stability analysis of a rock s lope using block theory. During the early stages of excavation of the intake slope, which is a dip slope with the bench face angle greater than the dip angle of the bedding planes, local failures due to sliding along bedding planes occurred. Then, the slope stability was re-evaluated using a two-dimensional (2-d) limit equilibrium method with new strength parameters of the bedding planes obtained through back-analysis. If overall sliding along bedding planes is considered, according to the re-evaluation results, the corresponding FOS will be less than 1.0 even if reinforcement is added. In view of this problem, a thorough investigation aimed at the cause of the sliding failures and the evaluation of the slope stability was performed. This study proposed consideration of the weathering unloading of shallow strata and the damage depth of blasting and reasonably utilised the lateral constraint of the downstream transverse slope sections. Based on the analytical results from block theory, the study proposed suggestions for slope support designs and measures for construction safety which have been adopted and implemented by various design organisations. The results have been verified by subsequent excavation.

Copyright

© 2024 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  - Bo Lu
AU  - Dongdong Xu
AU  - Jiliang Wang
PY  - 2024
DA  - 2024/04/24
TI  - Block stability analysis considering depth-dependent damage on bedding planes due to blasting
BT  - Proceedings of the 2023 5th International Conference on Hydraulic, Civil and Construction Engineering (HCCE 2023)
PB  - Atlantis Press
SP  - 720
EP  - 734
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-398-6_70
DO  - 10.2991/978-94-6463-398-6_70
ID  - Lu2024
ER  -