Authors: Adiyansyah, B; Gorokhov, D; Rakhmetov, B; Caratti, J; Bar, N

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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,

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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

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