Managing geotechnical risk in multi-pit operations

Authors: Wessels, SDN; Dixon, R

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DOI https://doi.org/10.36487/ACG_rep/1905_18_Wessels

Cite As:
Wessels, SDN & Dixon, R 2019, 'Managing geotechnical risk in multi-pit operations', in J Wesseloo (ed.), MGR 2019: Proceedings of the First International Conference on Mining Geomechanical Risk, Australian Centre for Geomechanics, Perth, pp. 311-322, https://doi.org/10.36487/ACG_rep/1905_18_Wessels

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Abstract:
Rio Tinto Iron Ore operates 16 different mine operations in the Pilbara region of Western Australia. Across these operations, there could be more than 100 operational open pits at any given time. This poses a considerable challenge for the effective management of geotechnical risks with finite resources. There are also a number of external legislation and internal compliance requirements that need to be adhered to. A number of standardised systems and tools have been developed by the geotechnical teams to manage the geotechnical risks and this paper introduces the different components of Rio Tinto Iron Ore’s geotechnical management System (GMS). The GMS covers the complete process, from the geotechnical design of a slope, through implementation to verification of performance and feedback to the design engineer. The focus of the paper will be on the Geotechnical Risk and Hazard Assessment Management System (GRAHAMS) which is used to assess and document the safety and economic geotechnical risk assessments of different slope areas. A number of reports and visual summaries of the risk assessments are available in the system, offering leaders the opportunity to identify areas of elevated risk and allocate resources accordingly. Details of realised risks (geotechnical hazards) are also captured and GRAHAMS provides a process to communicate the hazard and relevant controls to operational personnel. The GRAHAMS system was recently enhanced, moving from a Microsoft Access front-end to a web-based platform. This will enable a number of system improvements to further increase its effectiveness.

Keywords: geotechnical risk management, geotechnical management system, risk assessments, multi-pit operations

References:
Bidwell, A, Knight, A & Anderson, WS 2013, ‘Geotechnical risk management at Teck Coal’, in PM Dight (ed.), Proceedings of the 2013 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering, Australian Centre for Geomechanics, Perth, pp. 841–852.
Cahill, J & Lee, M 2006, ‘Ground control at Leinster Nickel Operations’, Proceedings of the International Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering, The Southern African Institute of Mining and Metallurgy, Johannesburg, pp. 321–334.
de Graaf, PJH & Wessels, SDN 2016, ‘A framework for managing geotechnical risk across multiple operations’, The Journal of The Southern African Institute for Mine and Metallurgy, vol. 116, no. 5, pp. 367–377.
Dixon RA, Johnson TM, de Graaf PJH, & Wessels SDN 2011, ‘Risk based geotechnical slope reconciliation at Rio Tinto Iron Ore, Pilbara Operations’, in E Eberhardt & D Stead (eds), Proceedings of the 2011: International Symposium on Rock Slope Stability in Open Pit Mining and Civil Engineering, Canadian Rock Mechanics Association.
Johnson, JD, Ferguson, D & Guy, G 2007, ‘Risk based slope design for opencast coal mines at Rotowaro, Huntly, New Zealand’, 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. 157–171.
Roux, R, Terbrugge, PJ & Badenhorts, F 2006, ‘Slope management at Navachab Gold Mine, Namibia’, Proceedings of the International Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering, The Southern African Institute of Mining and Metallurgy, Johannesburg, pp. 579–564.
Sullivan, P 2006, ‘Pit slope design and risk – A view of the current state of the art’, Proceedings of the International Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering, The Southern African Institute of Mining and Metallurgy, Johannesburg, pp. 51–80.
Terbrugge, PJ, Wesseloo, J, Venter, J & Steffen, OKH 2006, ‘A risk consequence approach to open pit slope design’, Journal of the South African Institute of Mining and Metallurgy, vol. 106, no. 7, pp. 503–511.
Wesseloo, J & Read, J 2009, ‘Acceptance criteria’, in P Stacey & J Read (eds), Guidelines for Open Pit Slope Design, CSIRO Publishing, Collingwood, pp. 221–236




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