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

Ghabraie, Behrooz and Ren, Gang and 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, 31 (2). pp. 667-682. ISSN 0960-3182

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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.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2013 Springer Science+Business Media Dordrecht. Published version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 31 Jul 2013 05:24
Last Modified: 05 Feb 2018 06:36
Uncontrolled Keywords: truss bolt; reinforcement; FEM; stability indicators; underground excavation; ground control
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
09 Engineering > 0914 Resources Engineering and Extractive Metallurgy > 091405 Mining Engineering
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
B Economic Development > 85 Energy > 8502 Mining and Extraction of Energy Resources > 850201 Coal Mining and Extraction
Identification Number or DOI: 10.1007/s10706-013-9617-7
URI: http://eprints.usq.edu.au/id/eprint/23666

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