Geotechnical risk assessment of rock slope stability using non-linear strength criterion

User Rating:  / 1
PoorBest 

Authors:

R.Boukarm, Laboratory of Construction Engineering and Architecture (LGCA), Faculty of Technology, University of Bejaia,  Bejaia, Algeria, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., Mining and Geology Department, Faculty of Technology, University of Bejaia, Bejaia, Algeria

A.Houam, Dr. Sc. (Tech.), Prof., King Khalid University, College of Engineering, Civil Department, Guraiger, Abha, Kingdom of Saudi Arabia

M. Fredj, Mining and Geology Department, Faculty of Technology, University of Bejaia, Bejaia, Algeria

R. Boucif, Mining and Geology Department, Faculty of Technology, University of Bejaia, Bejaia, Algeria

Abstract:

Purpose. To assess the geotechnical risk of rock slope stability by empirical, numerical and Limit Equilibrium methods with the generalized Hoek-Brown criterion as a strength failure criterion to encompass all structural and geomechanical parameters influencing the stability of the open slope.

Methodology. The study conducted risk assessment in three steps: risk identification, risk analysis, and risk evaluation. First, site observation and movement monitoring confirmed the real existence of instability risk. Then, from the in situ and laboratory investigations, an empirical classification called Slope Mass Rating, SMR and a geotechnical model were obtained. Finally, a quantification of this risk was evaluated using the limit equilibrium method and the finite difference method while considering the nonlinear criterion of Hoek-Brown as a criterion of failure.

Findings. The non-linear generalized Hoek-Brown criterion can be used with some reliability in these stability studies since it takes into account the conditions of the discontinuities and the rate of fracturing within the rock mass.

Originality. The method for geotechnical risk management was used based on the application of different approaches to quantify the geotechnical risk induced by the exploitation of this open pit. To attain the objective, the following techniques were involved: rock mass classification, geological strength index, limit equilibrium analysis. The philosophy of the research implies combining geometrical, structural and mechanical parameters to assess the rock slope stability

Practical value. This work has allowed us to conclude that SMR classification can be used as a prior check taking into account the structural and geometric context of the rock mass (orientation and integrity damage conditions, fracturing rates). The values of the safety factors of the extended Janbu’s method and that of Morgenstern & Price are quite close to the method of finite differences (use of shear strength reduction technique)

References.

1.  Siddique, T., Alam, M.M., Mondal, M.E.A., & Vishal, V. (2015). Slope mass rating and kinematic analysis of slopes along the national highway-58 near Jonk, Rishikesh, India, Journal of Rock Mechanics and Geotechnical Engineering. DOI: 10.1016/j.jrmge.2015.06.007.

2.  Saranaathan, S.E., & Kannan, M. (2017). SMR and Kinematic analysis for slope instability along Bodi-Bodimettu ghat section, Tamil Nadu. Journal of the Geological Society of India, 89(5), 589-599. DOI: 10.1007/s12594-017-0648-1.

3. Faramarzi, L., Zare, M., Azhari, A., & Tabaei, M. (2016). Assessment of rock slope stability at Cham-Shir Dam Power Plant pit using the limit equilibrium method and numerical modeling. Bull. Eng. Geol. Environ. DOI: 10.1007/s10064-016-0870-x.

4. Pantelidis, L. (2009). Rock slope stability assessment through rock mass classification systems. International Journal of Rock Mechanics & Mining Sciences, 46, 315-325. DOI: 10.1016/j.ijrmms.2008.06.003.

5.  Bhawani Singh, & Goel, R.K. (1999). Rock Mass Rating (RMR). In Rock Mass Classification (1st ed., pp 34-46). Elsevier Science Ltd. DOI: 10.1016/B978-008043013-3/50006-7.

6.  Bhawani Singh, & Goel, R.K. (1999). Slope Mass Rating (SMR). In Rock Mass Classification (1st ed., pp 171-183). Elsevier Science Ltd. DOI: 10.1016/B978-008043013-3/50017-1.

7.  Bhawani Singh, Goel, R.K. (1999). Geological Strength Index (GSI). In Rock Mass Classification (1st ed., pp 242-249). Elsevier Science Ltd. DOI: 10.1016/B978-008043013-3/50025-0.

8.  Basahel, H., & Mitri, H. (2017). Application of rock mass classification systems to rock slope stability assessment: A case study. Journal of Rock Mechanics and Geotechnical Engineering, 9(6), 993-1009. DOI: 10.1016/j.jrmge.2017.07.007.

9. Duncan C. Wyllie. (2018). Rock slope engineering: civil applications (5th ed.). Boca Raton: CRC Press.DOI: 10.4324/9781315154039.

10. Fredj, M., Hafsaoui, A., Khadri, Y., & Boukarm, R. (2018). Influence of the failure surface choice on the safety factor value during slope stability studies. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 3, 30-35. DOI: 10.29202/nvngu/2018-3/3.

11. Ureel, S., & Momayez, M. (2014). An Investigation of the Limit Equilibrium Method and Numerical Modeling for Rock Slope Stability Analysis. In Conference: ASCE. At: Shanghai, China. DOI: 10.1061/9780784413395.025.

12. Eberhardt, E. (2012). The Hoek-Brown failure criterion. Rock Mechanics and Rock Engineering, 45(6), 981-988. DOI: 10.1007/s00603-012-0276-4.

13.Nouioua, I., Fehdi, C., Boubaya, D., Serhane, B., & Djellali, A. (2015). Mapping underground cracks using 2D electrical resistivity tomography: the case of the landslide of Kef Essenoun phosphate deposit, Djebel El-Onk (northeast of Algeria). Arab J Geosci. DOI: 10.1007/s12517-014-1769-0.

14. Gadri, L., Hadji, R., Zahri, F., Benghazi, Z., Boumezbeur, A., Laid, B. M., & Raїs, K. (2015). The quarries edge stability in opencast mines: a case study of the Jebel Onk phosphate mine, NE Algeria. Arabian Journal of Geosciences, 8(11), 8987-8997. DOI: 10.1007/s12517-015-1887-3.

15. Hoek, E., Carter, T.G., & Diederichs, M.S. (2013). Quantification of the geological strength index chart. In: 47th US Rock Mech. Geomech. Symp, San Francisco, CA, USA June 23-26.

16. Read, J., & Stacy, P. (2009). Guidelines for Open Pit Slope Design. CRC Press. ISBN: 978-0415874410.

17. Rocscience (2010). Slide 6.0: stability analysis for soil and rock slopes. Rocscience, Toronto.

18. Diederichs, M. S., Lato, M., Hammah, R., & Quinn, P. (2007). Shear Strength Reduction (SSR) approach for slope stability analyses. In Rock Mechanics Meeting Society’s Challenges, and Demands.Proceedings of the 1st Canada–US rock mechanics symposium. Vancouver, Canada, 27‒31 May 2007, Taylor & Francis Group, London, UK. DOI: 10.1201/NOE0415444019.

19. FLAC: Itasca (2011). FLAC/Slope. I. Itasca Consulting Group. Minneapolis, Minnesota 55401 USA.

 повний текст / full article



Visitors

3311793
Today
This Month
All days
184
8017
3311793

Guest Book

If you have questions, comments or suggestions, you can write them in our "Guest Book"

Registration data

ISSN (print) 2071-2227,
ISSN (online) 2223-2362.
Journal was registered by Ministry of Justice of Ukraine.
Registration number КВ No.17742-6592PR dated April 27, 2011.

Contacts

D.Yavornytskyi ave.,19, pavilion 3, room 24-а, Dnipro, 49005
Tel.: +38 (056) 746 32 79.
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
You are here: Home Archive by issue 2019 Contens №4 2019 Geotechnical and Mining ­Mechanical Engineering, Machine Building Geotechnical risk assessment of rock slope stability using non-linear strength criterion