Simultaneous pattern and size optimisation of rock bolts for underground excavations

Nguyen, Tin and Ghabraie, Kazem and Tran-Cong, Thanh (2015) Simultaneous pattern and size optimisation of rock bolts for underground excavations. Computers and Geotechnics, 66. pp. 264-277. ISSN 0266-352X

Abstract

Designing a rock bolt reinforcement system for underground excavation involves determining bolt pattern, spacing, and size. In this paper, a topology optimisation technique is presented and employed to simultaneously optimise these design variables. To improve rock bolt design, the proposed technique minimises a displacement based function around the opening after bolt installation. This optimisation technique is independent of the material model and can be easily applied to any material model for rock and bolts. It is also extremely flexible in that it can be applied to any mechanical analysis method. To illustrate the capabilities of this method, numerical examples with non-linear material models and discontinuities in the host rock are presented. It is shown that the complexity of systems optimised using this approach is only restricted by limitations of the method used to analyse mechanical system responses.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Copyright 2015 Elsevier Ltd. Permanent restricted access to published version due to publisher copyright policy.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 11 Mar 2015 04:38
Last Modified: 29 Jun 2016 01:26
Uncontrolled Keywords: layout optimisation; rock bolts; size optimisation; topology optimisation; tunnel reinforcement; underground excavation
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering
09 Engineering > 0914 Resources Engineering and Extractive Metallurgy > 091402 Geomechanics and Resources Geotechnical Engineering
01 Mathematical Sciences > 0101 Pure Mathematics > 010112 Topology
Socio-Economic Objective: B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870302 Metals (e.g. Composites, Coatings, Bonding)
Identification Number or DOI: 10.1016/j.compgeo.2015.02.007
URI: http://eprints.usq.edu.au/id/eprint/26865

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