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

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, vol. 31, no. 2, pp. 667-682, doi: 10.1007/s10706-013-9617-7.

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Title A study on truss bolt mechanism in controlling stability of underground excavation and cutter roof failure
Author(s) Ghabraie, Behrooz
Ren, Gang
Ghabraie, KazemORCID iD for Ghabraie, Kazem orcid.org/0000-0002-1043-3403
Xie, Yi Min
Journal name Geotechnical and geological engineering
Volume number 31
Issue number 2
Start page 667
End page 682
Total pages 16
Publisher Springer
Place of publication Amsterdam, The Netherlands
Publication date 2013-04
ISSN 0960-3182
Keyword(s) Truss bolt
Stability indicators
Underground excavation
Ground control
Summary 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.
Language eng
DOI 10.1007/s10706-013-9617-7
Field of Research 010303 Optimisation
090506 Structural Engineering
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2013, Springer Science+Business Media Dordrecht
Persistent URL http://hdl.handle.net/10536/DRO/DU:30087021

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