Lee, MF, de Vries, R & Moller, CF 2017, 'Rock stresses, its controls and associated ground behaviour at the Rosebery mine, Tasmania', in J Wesseloo (ed.), Deep Mining 2017: Proceedings of the Eighth International Conference on Deep and High Stress Mining
, Australian Centre for Geomechanics, Perth, pp. 901-916, https://doi.org/10.36487/ACG_rep/1704_62_Moller
The Rosebery mine, on the west coast of Tasmania, is currently one of Australia’s deepest mines. The orebodies dip moderately (45°) and mining is currently about 1,800 m below Mount Black. As might be expected, ground conditions are challenging regarding rock stresses versus the strength of the rock mass.
Over 22 years, from 1983 to 2015, in situ rock stress measurements have been made at 16 sites at varying depths from about 500 to 1,800 m below surface. This data is documented and summarised, with depth and possible geologic and structural controls, to provide an understanding of what locally controls Rosebery’s rock stresses.
This understanding has been used to better appreciate some aspects of the mine’s challenging ground conditions.
Keywords: rock stress measurement, rock stresses, structures, ground behaviour, ground support
Barton, N, Lien, R & Lunde, J 1974, ‘Engineering classification of rock masses for the design of tunnel support’, Rock Mechanics, vol. 6, no. 4, pp. 189–236.
Beck, D & Sandy, M 2003, ‘Mine sequencing for high recovery in Western Australian mines’, Proceedings of the 12th International Symposium on Mine Planning and Equipment Selection, The Australasian Institute of Mining and Metallurgy, Carlton South, Victoria, pp. 137–144.
Harrison, JP, Hudson, JA & Carter, JN 2007, ‘Is there a relation between the in situ principal stress magnitudes in rock masses?’, in E Eberhardt, D Stead & T Morrison (eds), Proceedings of the 1st Canada-US Rock Mechanics Symposium, 27–31 May 2007, Vancouver, CRC Press.
Hillis, RR & Reynolds, SD 2003, ‘In situ stress field of Australia’, Geological Society of Australia Special Publication, vol. 22, pp. 43–52.
Hoek, E & Brown, ET 1980, Underground Excavations in Rock, The Institution of Mining and Metallurgy, London.
Lee, MF 1997, Confidence-Rating System for Rock Stress Measurements, AMC Consultants Pty Ltd (unpublished).
Martin, NK 2004, Genesis of the Rosebery Massive Sulphide Deposit, PhD thesis, University of Tasmania, Hobart.
Potvin, YH & Hadjigeorgiou, J 2008, ‘Ground support strategies to control large deformations in mining excavations’, The Journal of the Southern African Institute of Mining and Metallurgy, vol. 108, July 2008, pp. 393–400.
Thomas, S 2015, Resin Bolt Projectiles and Hazard Control, Rosebery Mine, Eastern Australian Ground Control Workshop, Launceston, March.
Villaescusa, E, Player, JR & Thompson, AG 2014, ‘A reinforcement design methodology for highly stressed rock masses’, Proceedings of the 8th Asian Rock Mechanics Symposium, Sapporo, Japan.