A study on truss bolt mechanism in controlling stability of underground excavation and cutter roof failure

Article


Ghabraie, Behrooz, Ren, Gang, Ghabraie, Kazem and Xie, Yi Min. 2013. "A study on truss bolt mechanism in controlling stability of underground excavation and cutter roof failure." Geotechnical and Geological Engineering: an international journal. 31 (2), pp. 667-682. https://doi.org/10.1007/s10706-013-9617-7
Article Title

A study on truss bolt mechanism in controlling stability of underground excavation and cutter roof failure

ERA Journal ID4022
Article CategoryArticle
AuthorsGhabraie, Behrooz (Author), Ren, Gang (Author), Ghabraie, Kazem (Author) and Xie, Yi Min (Author)
Journal TitleGeotechnical and Geological Engineering: an international journal
Journal Citation31 (2), pp. 667-682
Number of Pages16
Year2013
PublisherSpringer
Place of PublicationNetherlands
ISSN0960-3182
1573-1529
Digital Object Identifier (DOI)https://doi.org/10.1007/s10706-013-9617-7
Web Address (URL)https://link.springer.com/article/10.1007/s10706-013-9617-7
Abstract

The truss bolt reinforcement system has been used in controlling the stability of underground excavations in severe ground conditions and cutter roof failure in layered rocks especially in coal mines. In spite of good application reports, working mechanism of this system is largely unknown and truss bolts are predominantly designed based on past experience and engineering judgement. In this study, the reinforcing effect of the truss bolt system on an underground excavation in layered rock is studied using non-linear finite element analysis. Different indicators are defined to evaluate the reinforcing effects of the truss bolt system. Using these indicators one can evaluate the effects of a reinforcing system on the deformation, loosened area, failure prevention, horizontal movement of the immediate layer, shear crack propagation and cutter roof failure of underground excavations. Effects of truss bolt on these indicators reveal the working mechanism of the truss bolt system. To illustrate the application of these indicators, a comparative study is conducted between three different truss bolt designs. It is shown that the design parameters of truss bolt systems, including tie-rod span, length, and angle of the bolts can have significant effects on the reinforcing capability of the system.

Keywordstruss bolt; reinforcement; FEM; stability indicators; underground excavation; ground control
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020400502. Civil geotechnical engineering
401902. Geomechanics and resources geotechnical engineering
401905. Mining engineering
Public Notes

File reproduced in accordance with the copyright policy of the publisher/author.

Institution of OriginUniversity of Southern Queensland
Byline AffiliationsRoyal Melbourne Institute of Technology (RMIT)
Department of Agricultural, Civil and Environmental Engineering
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