Authors: Bungard, GP; Gleeson, A; Basson, FRP
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Abstract:
Kalgoorlie Consolidated Gold Mines (KCGM) has recently completed a slope optimisation study to safely steepen the western wall of the Golden Pike cutback. The optimised slope design exceeds 700 m in height, with a maximum overall slope angle of 52°, putting it near the limit of global experience. To build a case for a steeper slope design, KCGM undertook a campaign of data collection and analysis, which culminated in the successful completion of batter steepening trials within selected geotechnical domains. The optimised design incorporates a 75/90° bi-angle batter face, to achieve steeper inter ramp slopes while maintaining sufficient berm catch capacity. This paper summarises the work undertaken to support the steepened slope design and the future geotechnical engineering inputs required for successful completion.

Keywords: slope optimisation, slope steepening, data collection, batter trial, bi-angle batter

Citation:
Bungard, GP, Gleeson, A & Basson, FRP 2016, 'Slope steepening of the Golden Pike west wall at Fimiston Pit', in PM Dight (ed.), Proceedings of the First Asia Pacific Slope Stability in Mining Conference, Australian Centre for Geomechanics, Perth, pp. 239-252.

References:
Beer, AJ & Morrongiello, MR 2007, ‘Wall Optimisation – A case study from the Fimiston Open Pit, Kalgoorlie Consolidated Gold Mines’, in Y Potvin (ed.), Proceedings of the 2007 International Symposium on Rock Slope Stability in Open Pit Mining and Civil Engineering, Australian Centre for Geomechanics, Perth, pp. 403–415.
Clout, JMF, Cleghorn, JH & Eaton, PC 1990, ‘Geology of the Kalgoorlie Goldfield’, in FE Hughes (ed.), Geology of the Mineral Deposits of Australia and Papua New Guinea, Australasian Institute of Mining and Metallurgy, Melbourne, pp. 411–431.
Wesseloo, J & Read, J 2009, ‘Acceptance Criteria’ in Read, R & Stacey, P (eds), Guidelines for Open Pit Slope Design, CSIRO Publishing, ch. 9, pp. 229–230.
Wines, DR 2015, Three-dimensional Numerical Slope Stability Analyses for the East and West Walls at the Superpit, unpublished company report, Itasca Australia Pty Ltd.




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