Investigation of seismic effects on disturbed rock slope stability assessments

Qian, Z., Li, A. J., Lyamin, A. V. and Wang, J. P. 2015, Investigation of seismic effects on disturbed rock slope stability assessments, in ISRM 2015 : Innovations in Applied and Theoretical Rock Mechanics : Proceedings of the 13th International Symposium on Rock Mechanics, Canadian Institute of Mining, Metallurgy and Petroleum, Quebec, Canada, pp. 1-9.

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Title Investigation of seismic effects on disturbed rock slope stability assessments
Author(s) Qian, Z.
Li, A. J.
Lyamin, A. V.
Wang, J. P.
Conference name Rock Mechanics. Congress (13th : 2015 : Montreal, Canada)
Conference location Montreal, Canada
Conference dates 10-13 May 2015
Title of proceedings ISRM 2015 : Innovations in Applied and Theoretical Rock Mechanics : Proceedings of the 13th International Symposium on Rock Mechanics
Publication date 2015
Start page 1
End page 9
Total pages 9
Publisher Canadian Institute of Mining, Metallurgy and Petroleum
Place of publication Quebec, Canada
Keyword(s) earthquake
safety factor
stability chart
disturbance factor
limit analysis
blasting damage zone
Summary For general stability analysis of rock slopes, rock mass strength and rock mass disturbance are definitely should be considered. In addition, the impact of earthquakes must be taken into account. In fact, the rock mass strength is very difficult to be assessed which causes the difficulty of analysing rock slope stability. Therefore, an empirical failure criterion, the Hoek-Brown failure criterion, has been proposed. It is one of the most widely accepted approaches to estimate rock mass strength. The rock mass disturbance is important and was found having significant influence on evaluating rock slope stability, especially for rock slope with poor quality rock mass. In the Hoek-Brown failure criterion, the disturbance factor can represent the level of the rock mass disturbance which would provide a reasonable basis for estimating rock mass strength. This research will not only discuss the slope factor of safety, but also consider the influence of the seismic force on rock slope stability assessment using pseudo-static method. In practice, only horizontal seismic coefficient is used. Various magnitudes of the disturbance factor and recommended blasting damage zone thickness are also taken into account. The blasting damage zone thickness considered ranges from 0.5 to 2.5 times of slope height. The research results have potential to be extended and then sets of comprehensive stability charts can be provided for the rock slope stability evaluations. They will be convenient tools for practising engineers. In this study, finite element upper bound and lower bound limit analysis methods are employed. Their applicability has been investigated in some previous studies. The differences between upper bound and lower bound solutions are less than ±10% which would provide reasonable and acceptable range for rock slope stability safety factor estimation.
ISBN 9781926872254
Language eng
Field of Research 090501 Civil Geotechnical Engineering
Socio Economic Objective 870201 Civil Construction Design
HERDC Research category E1 Full written paper - refereed
ERA Research output type E Conference publication
Copyright notice ©2015, CIM
Persistent URL http://hdl.handle.net/10536/DRO/DU:30082394

Document type: Conference Paper
Collection: School of Engineering
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