Authors: Campbell, AD

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DOI https://doi.org/10.36487/ACG_repo/2205_62

Cite As:
Campbell, AD 2022, 'A global review of recovery, dilution and draw control in sublevel caving mines', in Y Potvin (ed.), Caving 2022: Fifth International Conference on Block and Sublevel Caving, Australian Centre for Geomechanics, Perth, pp. 909-926, https://doi.org/10.36487/ACG_repo/2205_62

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Abstract:
Sublevel caving (SLC) has previously been regardedas a high dilution and low recovery mining method requiring specific orebody geometry and rock mass conditions to be successful. Progress in the past 20 years at numerous operations has broken this misconception. A wide range of challenges have been encountered and mitigated at operations around the world, including high stress and seismicity, fines, inrush hazard, remnant mining and interaction with open pits and other caves. Significant improvements have also been made in ore recovery and productivity. Variants of SLC including sublevel shrinkage (SLS) and sublevel retreat (SLR) have also become more widely implemented in modern operations. Unfortunately, these advancements in knowledge and practice are not widely published and generally remain within individual companies. To overcome this shortcoming, a global review of current practices in SLC was undertaken as part of the Cave Mining 2040 research consortium. The purpose of the global benchmark and mining review was to document and compare operational practices, technical aspects and hazard management techniques across SLC mines around the world. A total of 21 mines spread over four continents and 17 different mining companies participated in the study. This paper describes the main findings of the study related to ore recovery, dilution and draw control practices at the benchmarked mines.

Keywords: sublevel caving, dilution, recovery, benchmarking

References:
Bull, G & Page, CH 2000, ‘Sublevel caving–today’s dependable low-cost ‘ore factory’’, in G Chitombo (ed.), MassMin 2000,
The Australasian Institute of Mining and Metallurgy, Melbourne, pp. 537–556.
Campbell, AD 2019, Full-scale Experiments and Numerical Modelling to Improve Ore Recovery in Sublevel Cave Mines, PhD thesis,
The University of Queensland, Brisbane.
Campbell, AD & Power, GR 2016 ‘Increasing net present value by a third at an operating sublevel cave mine using draw strategy optimisation’, MassMin 2016: Proceedings of the Seventh International Conference and Exhibition on Mass Mining,
The Australasian Institute of Mining and Metallurgy, Melbourne, pp. 167–174.
Dunstan, G & Power, G 2011, ‘Sub level caving’, in P Darling (ed.), SME Mining Engineering Handbook, 3rd edn, Society for Mining, Metallurgy, and Exploration, Englewood.
Jamieson, M 2012, ‘Development of sub level cave draw optimisation at Newcrest Mining’, MassMin 2016: Proceedings of the Seventh International Conference and Exhibition on Mass Mining, The Australasian Institute of Mining and Metallurgy, Melbourne.
Kvapil, R 1965, ‘Gravity flow of granular materials in hoppers and bins: Part 2 – Coarse material’, International Journal of Rock Mechanics and Mining Sciences, vol. 2, no. 3, pp. 277–292.
Kvapil, R 1992, ‘Sublevel caving’, SME Mining Engineering Handbook, Society for Mining, Metallurgy, and Exploration, Englewood, pp. 1789–1814.
Kvapil, R 1998, ‘Mechanics and design of sublevel caving systems’, in RE Gertsch & RL Bullock (eds), Techniques in Underground Mining, Society for Mining Metallurgy and Exploration, Englewood, p. 621.
Kvapil, R 2004, Gravity Flow in Sublevel and Panel Caving – A Common Sense Approach, Luleå University of Technology, Luleå.
Power, GR 2004, Modelling Granular Flow in Caving Mines: Large Scale Physical Modelling and Full Scale Experiments, PhD thesis, The University of Queensland, Brisbane.




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