Authors: Arbi, HF; Doumis, K; Dalton, N
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Abstract:
Site geotechnical engineers are often reliant on elastic numerical modelling to assist with mine design and the selection of appropriate stoping sequences. Although plastic numerical models are often preferred, site engineers do not have access, or the ability, to use these codes. Hence, three-dimensional elasto-plastic analyses are not viable at most sites. The challenge for the site engineers is to use the available tools most effectively, and present the results in a way that most clearly communicates the mine design requirements. A first step is to establish a mine design criteria, which should not be confused with failure criteria. Mine design criteria correlate observed conditions with modelled stress states at a specific location. An effective mine design criterion then enables the assessment of probable future ground conditions on modelled stress states. Many design criteria could be used concurrently on a single mine site, as different failure mechanisms cannot be assessed with the same criterion. Comparing actual conditions or measurements with modelled stress states is the only way to establish a correlation that could be generalised into a design criterion. During the back analysis process, the actual response of the rock mass is recorded and categorised with a damage classification system and compared to different modelling result parameters. Different correlations are evaluated, and the criterion with the most consistent performance selected to make predictions of future ground conditions. This paper shares case studies where design criteria were successfully used at the Callie underground mine, and discusses the potential application areas for future evaluations. Keywords: back analysis of elastic numerical modelling

Keywords: back analysis of elastic numerical modelling

Citation:
Arbi, HF, Doumis, K & Dalton, N 2017, 'Strengths and weaknesses of using elastic numerical modelling in mine design at the Callie underground mine', in J Wesseloo (ed.), Proceedings of the Eighth International Conference on Deep and High Stress Mining, Australian Centre for Geomechanics, Perth, pp. 863-874.

References:
Basson, FRP 2016a, FailureCriteria, BasRock Software for Geotechs, Perth, Western Australia, http://www.basrock.com
Basson, FRP 2016b, GEM4D, BasRock Software for Geotechs, Perth, Western Australia, http://www.basrock.net
Basson, FRP & Dunn, MJ 2009, Numerical Modelling Guidelines for Underground Mine, Internal Newmont Report, September.
COMRO 1988, An Industry Guide to Methods and Amelioration the Hazards of Rockburst and Rockfalls, 2nd edn, Chamber of Mines Research Organisation, South Africa.
Graf, CC & Basson, FRP 2010, ‘Managing stress and ground condition changes with increasing depth at Callie underground mine’, Second Australasian Ground Control in Mining Conference.
Sandy, M, Sharrock, G, Albrecht, J & Vakili, A 2010, ‘Managing the transition from low stress to high stress condition’, Second Australasian Ground Control in Mining Conference, The Australasian Institute of Mining and Metallurgy, Carlton South.
Watson, O 2014, Tanami Production Expansion Geotechnical Study, Internal Newmont Report, November.
Wiles, T 2016, Map3D, version 65, Map3D International Ltd, http://www.map3d.com




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