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

Version 2 2024-06-04, 08:46
Version 1 2016-10-12, 11:44
journal contribution
posted on 2024-06-04, 08:46 authored by B Ghabraie, G Ren, Kazem GhabraieKazem Ghabraie, YM Xie
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.

History

Journal

Geotechnical and geological engineering

Volume

31

Pagination

667-682

Location

Amsterdam, The Netherlands

ISSN

0960-3182

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal, C Journal article

Copyright notice

2013, Springer Science+Business Media Dordrecht

Issue

2

Publisher

Springer