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 ID	4022
Article Category	Article
Authors	Ghabraie, Behrooz (Author), Ren, Gang (Author), Ghabraie, Kazem (Author) and Xie, Yi Min (Author)
Journal Title	Geotechnical and Geological Engineering: an international journal
Journal Citation	31 (2), pp. 667-682
Number of Pages	16
Year	2013
Publisher	Springer
Place of Publication	Netherlands
ISSN	0960-3182
	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.
Keywords	truss bolt; reinforcement; FEM; stability indicators; underground excavation; ground control
Contains Sensitive Content	Does not contain sensitive content
ANZSRC Field of Research 2020	400502. 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 Origin	University of Southern Queensland
Byline Affiliations	Royal Melbourne Institute of Technology (RMIT)
	Department of Agricultural, Civil and Environmental Engineering

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