Adiyansyah, B, Gorokhov, D, Rakhmetov, B, Caratti, J & Bar, N 2023, 'Three-dimensional geotechnical analysis on a strongly altered sedimentary domain at Bozshakol copper mine', in PM Dight (ed.), SSIM 2023: Third International Slope Stability in Mining Conference
, Australian Centre for Geomechanics, Perth, pp. 965-982, https://doi.org/10.36487/ACG_repo/2335_66
Bozshakol is a large open pit copper mine located in north Kazakhstan. During the initial mining phases, a series of multi-bench instabilities developed within a complex, sheared sedimentary rock mass on the south wall of the pit. These were safely managed using prism and radar monitoring.
This paper discusses three-dimensional geotechnical back-analyses that were used alongside information obtained from a series of geotechnical investigation programs and laboratory testing to determine realistic shear strength parameters for the complex materials in the geotechnical model. With improved geotechnical model confidence, forward analysis was completed to enable slope optimisation for future pushbacks and to provide guidance on slope depressurisation requirements for key geotechnical domains.
Keywords: anisotropy, limit equilibrium analysis, finite element analysis, 3D slope stability model, slope stability radar
AMC Consultants Pty Ltd 2010, Bozshakol Feasibility Study – Geotechnical, unpublished report, AMC Consultants Pty Ltd, Melbourne.
Bar, N & Weekes, G 2017, ‘Directional shear strength models in 2D and 3D limit equilibrium analyses to assess the stability of anisotropic rock slopes in the Pilbara region of Western Australia’, Australian Geomechanics Journal, vol. 52, no. 4,
Bar, N & McQuillan, A 2018, ‘3D limit equilibrium slope stability analysis for anisotropic and faulted rock masses in Australian coal and iron ore mines’, ISRM International Symposium - 10th Asian Rock Mechanics Symposium, OnePetro, Singapore, pp. 12.
KAZ Minerals 2023, Bozshakol, viewed 17 October 2023, www.kazminerals.com/our-business/bozshakol
Read, J & Stacey, P 2009, Guidelines for Open Pit Slope Design, CSIRO Publishing, Melbourne.
Shen, P, Pan, H, Seitmuratova, E, Yuan, F & Jakupova, S 2015, ‘A Cambrian intra-oceanic subduction system in the Bozshakol area, Kazakhstan’, Lithos, vol. 224–225, pp. 61–77.
Tektonik 2022, Bozshakol Cu Deposit, Kazakhstan: Structural Geological Model to Support Geotechnical and Hydrogeological Planning, unpublished report, Tektonik Consulting Limited, South Wales.