Lewis, PA 2022, 'Opening sublevel cave slot drifts at Diavik Diamond Mine', in Y Potvin (ed.), Caving 2022: Proceedings of the Fifth International Conference on Block and Sublevel Caving
, Australian Centre for Geomechanics, Perth, pp. 1411-1422, https://doi.org/10.36487/ACG_repo/2205_98
Sublevel retreat (SLR) and sublevel cave (SLC) production levels require an initial void for production drifts to begin blasting into. Slot drifts are commonly developed perpendicular to production drifts and used to establish a free face using uphole drilling and blasting. Unlike in open stoping, these openings are filled with caved or blasted material, requiring choke blasting. The overall approach of establishing these slot drifts is relatively straightforward from a high level, operationally there are many options to achieve this. It is important to understand the impact these options have on safety, ore recovery, and production rates.
Diavik Diamond Mine uses SLR/SLC methods to mine two ore bodies. During the last 10 years of production, seven different methods have been used to open and establish slots in SLR/SLC levels. This paper examines the various methods used and their suitability to different situations. The methods used at Diavik are heavily dependent on ground conditions and what the ore quality will allow. The work completed at Diavik may offer a starting point for other mines beginning or changing an SLR or SLC.
Keywords: sublevel cave, sublevel retreat, slot, blasting
Bull, G & Page, CH 2000, ‘Sublevel caving - today’s dependable low-cost ‘ore factory’’, Proceedings of 3rd International Conference and Exhibition on Mass Mining 2000, The Australasian Institute of Mining and Metallurgy, Melbourne, pp. 537–556.
Di Giovinazzo, M & Singh, U 2010, ‘Instrumentation and monitoring of cave initiation at Telfer Mine’, in Y Potvin (ed.), Caving 2010: Proceedings of the Second International Symposium on Block and Sublevel Caving, Australian Centre for Geomechanics, Perth, pp. 145–155,
Diavik Diamond Mine 2021, Ground Control Management Plan, Diavik Diamond Mines, Yellowknife.
Jakubec, J, Page C & Harvey, P 2004, ‘Mining method selection for diamond mines - challenges in the arctic’, in A Karzulovic
& MA Alfaro (eds), Proceedings of MassMin 2004, Instituto de Ingenieros de Chile, Santiago.
Kosowan, MI 1999, Design and Operational Issues for Increasing Sublevel Cave Intervals at Stobie Mine, MSc thesis, Laurentian University, Sudbury.
Lewis, PA, Clark, LM, Rowles, SJ, Auld, CP, Petryshen, CM & Elderkin, AP 2018, ‘Sublevel retreat mining in the subarctic: a case study of the Diavik Diamond Mine’, in Y Potvin & J Jakubec (eds), Caving 2018: Proceedings of the Fourth International Symposium on Block and Sublevel Caving, Australian Centre for Geomechanics, Perth, pp. 57–72,
Page, CH & Bull, G 2001, ‘Sublevel caving: a fresh look at this bulk mining method’, in WA Hustrulid & RL Bullock (eds), Underground Mining Methods: Engineering Fundamentals and International Case Studies, Society for Mining, Metallurgy, and Exploration, Englewood, pp. 385–394.
Power, G & Just, GD 2008, ‘A review of sublevel caving current practice’, in H Schunnesson & E Nordlund (eds.), Proceedings of the 5th International Conference and Exhibition on Mass Mining 2008, Luleå University of Technology, Luleå, pp. 155–166.
Yip, CG & Pollock, KS 2017, Diavik Diamond Mine NI 43-101 Technical Report, Diavik Diamond Mines, Yellowknife.