Authors: Mercier-Langevin, F; Wilson, D


Cite As:
Mercier-Langevin, F & Wilson, D 2013, 'Lapa Mine – ground control practices in extreme squeezing ground', in Y Potvin & B Brady (eds), Proceedings of the Seventh International Symposium on Ground Support in Mining and Underground Construction, Australian Centre for Geomechanics, Perth, pp. 119-131.

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Abstract:
Many underground hard rock mines have to deal with various degrees of squeezing in underground tunnels. Depending on the severity of the phenomenon, considerable investments either in rock reinforcement and support can be necessary. In worst cases, time-consuming and possibly hazardous scaling and rehabilitation operations can be required to keep drifts serviceable. Therefore, a proper understanding of the rock mass, its response to excavation and the mechanisms involved is paramount to the design of cost-effective ground support systems in squeezing ground. The Lapa gold mine located in northwestern Quebec operates in such challenging ground conditions. Using field observations and data from the Hard Rock Squeezing Ground Index (Mercier-Langevin and Hadjigeorgiou, 2011), a plausible failure mechanism is proposed. The resulting ground control strategy is presented.

References:
Agnico-Eagle Mines Ltd (2012) Agnico-Eagle Reports Fourth Quarter and Full Year 2012 Results; Record Annual Production and Operating Cash Flows; Provides Three Year Production Guidance and Reserve and Resource Update, Agnico-Eagle Mines Limited, Toronto, viewed 13 February 2013, .
Barla, G. (1995) Squeezing rocks in tunnels, ISRM News Journal, International Society for Rock Mechanics, Portugal, Vol. 2, No. 3/4, pp. 44–49.
Dobereiner, L. and De Freitas, M.H. (1986) Geotechnical properties of weak sandstones, Géotechnique, Vol. 36, No. 1, 1986, pp. 79–94.
Hoek, E. (2001) Big tunnels in bad rock, ASCE Journal of Geotechnical and Geoenvironmental Engineering, Vol. 127, No. 9, pp. 726−740.
Laing, R.G. (2012) Agnico-Eagle Mines Ltd – Annual report pursuant to section 13 or 15(d) of the Securities Exchange Act of 1934 for the fiscal year ended December 31 2012, United States Securities and Exchange Commission.
Mercier-Langevin, F. and Hadjigeorgiou, J. (2011) Towards a better understanding of squeezing potential in hard rock mines, Mining Technology Journal, Vol. 120, No. 1, 2011, pp. 36–44.
Mercier-Langevin, F. and Turcotte, P. (2007) Evolution of ground support practices at Agnico Eagle’s LaRonde Division: innovative solutions to high stress yielding ground, Rock Mechanics: Meeting Society’s Challenges and Demands, in Proceedings 1st Canada-US Rock Mechanics Symposium, E. Eberhardt, D. Stead and T. Morrison (eds), 27–31 May 2007, Vancouver, Canada, Taylor & Francis, pp. 1497–1504.
Mercier-Langevin, F. (2005) Projet de convergence des galeries - Phase 1: Consolidation de l'information disponible à la mine, Internal Memo, Agnico-Eagle Mines Ltd - LaRonde Division, Cadillac, Canada, 13 p.
Potvin, Y. and 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.
Sandy, M.P., Gibson, W. and Gaudreau, D. (2007) Canadian and Australian ground support practices in high deformation environments, in Proceedings Fourth International Seminar on Deep and High Stress Mining (Deep Mining 07), Y. Potvin (ed), 7‒9 November 2007, Perth, Australia, Australian Centre for Geomechanics, Perth, pp. 297–312.
Simser, B.P. (2007) The weakest link – ground support observations at some Canadian shield hard rock mines, in Proceedings Fourth International Seminar on Deep and High Stress Mining (Deep Mining 07), Y. Potvin (ed), 7‒9 November 2007, Perth, Australia, Australian Centre for Geomechanics, Perth, pp. 335–348.
Simser, B.P, Andrieux, P., Langevin, F., Parrott, T. and Turcotte, P. (2006) Field behaviour and failure modes of modified conebolts at the Craig, LaRonde and Brunswick mines in Canada, in Proceedings Third International Seminar on Deep and High Stress Mining Seminar, 2–4 October 2006, Quebec City, Canada, pp. 347–354.
Turcotte, P. (2010) Field behaviour of the hybrid bolt at LaRonde, in Proceedings Fifth International Seminar on Deep and High Stress Mining, M. Van Sint Jan and Y. Potvin (eds), 6–8 October 2010, Santiago, Chile, Australian Centre for Geomechanics, Perth, pp. 309–319.




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