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The mechanism of the bottom-crashing rockfall of a massive layered carbonate rock mass at Zengziyan, Chongqing, China

  • Kai He
  • Yueping YinEmail author
  • Bin Li
  • Chunli Chen
Article
  • 9 Downloads

Abstract

Multiple carbonate cliffs are distributed in the karst mountain areas of southwestern China. The dynamic process and failure mechanism of rockfalls in the cliffs are complicated and undefined, and can be dangerous for settlements. Moreover, it is difficult to identify the potential for such failures before they occur. The rockfall of the Zengziyan cliff at Chongqing, China, is used as an example for studying this type of failure and to determine the developmental characteristics of rockfall, expounding on the evolving process from a cliff to an unstable rock mass through to rockfall. A fracturing–crashing failure mode is proposed, based on the evolutionary characteristics of damage development, compression-induced fracturing, rock mass crashing and overall rockfall. Finite difference numerical simulations were used to analyse and validate the failure mode of the Zengziyan cliff under three simulation conditions. The results of the simulations indicated that strength deterioration at the bottom of the cliff was the root cause of its fracturing–crashing rockfall. The outcomes of this paper could provide a new analytical model and theoretical basis for identifying and analysing similar types of geological disasters in the mountainous areas of southwestern China, and may provide valuable reference information for further mechanical analysis, stability evaluation and engineering prevention of unstable rock masses prone to a fracturing–crashing rockfall.

Keywords

Bottom zone failure mode fracturing–crashing rockfall damage-induced deterioration numerical simulation 

Notes

Acknowledgements

This study was conducted with the financial support from the National Natural Science Foundation of China (No. 41702342) and National Key R&D Program of China (2018YFC1504806, 2018YFC1504805).

References

  1. Feng Z, Li B, Cai Q and Cao J 2016 Initiation mechanism of the Jiweishan landslide in Chongqing, south-western China; Environ. Eng. Geosci. 22 34–351.Google Scholar
  2. Frayssines M and Hantz D 2006 Failure mechanisms and triggering factors in calcareous cliffs of the subalpine ranges (French Alps); Eng. Geol. 86 256–270.CrossRefGoogle Scholar
  3. Glastonbury J and Fell R 2008 A decision analysis framework for the assessment of likely post-failure velocity of translational and compound natural rock slope landslides; Can. Geotech. J. 45 329–350.CrossRefGoogle Scholar
  4. He K, Chen C and Li B 2018 Case study of a rockfall in Chongqing, China: Movement characteristics of the initial failure process of a tower-shaped rock mass; Bull. Eng. Geol. Environ.,  https://doi.org/10.1007/s10064-018-1364-9.
  5. Hoek E and Bray J 1977 Rock slope engineering (2nd edn); Institution of Mining & Metallurgy, London.Google Scholar
  6. Huang B, Yin Y, Liu G, Wang S, Chen X and Huo Z 2012 Analysis of waves generated by Gongjiafang landslide in Wu Gorge, three Gorges reservoir, on November 23, 2008; Landslides 9 395–405.CrossRefGoogle Scholar
  7. Huang R 2012 Mechanisms of large-scale landslides in China; Bull. Eng. Geol. Environ. 71 161–170.CrossRefGoogle Scholar
  8. Hungr O 1981 Dynamics of rock avalanches and other types of slope movements; PhD Thesis, University of Alberta, Edmonton, 500p.Google Scholar
  9. Hungr O and Evans S G 2004 The occurrence and classification of massive rock slope failure; Felsbau 22 16–23.Google Scholar
  10. Hungr O, Evans S G, Bovis M and Hutchinson J N 2001 Review of the classification of landslides of the flow type; Environ. Eng. Geosci. VII 221–238.CrossRefGoogle Scholar
  11. Hungr O, Leroueil S and Picarelli L 2014 The varnes classification of landslide types, an update; Landslides 11 167–194.CrossRefGoogle Scholar
  12. Jones D B, Siddle H J, Reddish D J and Whittaker B N 1992 Landslide and undermining: Slope stability interaction with mining; In: Proceedings of the 7th International Society of Rock Mechanics congress, Aachen, pp. 893–898.Google Scholar
  13. Keiler M and Fuchs S 2016 Vulnerability and exposure to geomorphic hazards: Some insights from the European Alps, Geomorphology and Society; Springer, Tokyo.Google Scholar
  14. Li B, Feng Z, Wang G and Wang W 2016 Processes and behaviors of block topple avalanches resulting from carbonate slope failures due to underground mining; Environ. Earth Sci. 75 694–720.CrossRefGoogle Scholar
  15. Peisser C D, Helmstetter A, Grasso J R, Hantz D, Desvarreux P, Jeannin M and Giraud A 2002 Probabilistic approach to rock fall hazard assessment: Potential of historical data analysis; Nat. Hazards Earth Syst. 2 15–26.CrossRefGoogle Scholar
  16. Poisel R and Eppensteiner W 1988 A contribution to the systematics of rock mass movements; In: 5th international symposium on landslides, Lausanne, pp. 1353–1357.Google Scholar
  17. Poisel R, Steger W and and Zeitler A 1991 Stability investigations of competent rock masses lying on an incompetent base; In: 7th ISRM Congress, International Society for Rock Mechanics, pp. 939–944.Google Scholar
  18. Poisel R, Martin B, Rudolf H and Pavel L 2005 Geomechanics of hazardous landslides; J. Mt. Sci. 2 211–217.CrossRefGoogle Scholar
  19. Susan L N, Hungr O and Evans S G 2002 Large-scale brittle and ductile toppling of rock slopes; Can. Geotech. J. 39 773–788.CrossRefGoogle Scholar
  20. Terzaghi K 1950 Mechanism of landslides; The Geological Society of America, America, pp. 83–123.Google Scholar
  21. Yin Y, Huang B, Liu G and Wang S 2015 Potential risk analysis on a Jianchuandong dangerous rockmass-generated impulse wave in the Three Gorges Reservoir, China; Environ. Earth Sci. 74 2595–2607.CrossRefGoogle Scholar
  22. Yin Y, Sun P, Zhang M and Li B 2011 Mechanism on apparent dip sliding of oblique inclined bedding rockslide at Jiweishan, Chongqing, China; Landslides 8 49–65.CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 2019

Authors and Affiliations

  1. 1.Key Laboratory of Neotectonic and Goehazard, Ministry of Land Resources, Institute of GeomechanicsChinese Academy of Geological SciencesBeijingThe People’s Republic of China
  2. 2.Technical Center for Geo-Hazards Prevention of MNR, ChinaChina Institute for Geo-Environment MonitoringBeijingThe People’s Republic of China

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