Authors: Bridges, MC


DOI https://doi.org/10.36487/ACG_rep/1308_03_Bridges

Cite As:
Bridges, MC 2013, 'An extensional mechanism of instability and failure in the walls of open pit mines', in PM Dight (ed.), Slope Stability 2013: Proceedings of the 2013 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering, Australian Centre for Geomechanics, Perth, pp. 137-150, https://doi.org/10.36487/ACG_rep/1308_03_Bridges

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Abstract:
Evidence from studies of instability and failures in the walls of open pit mines and cuttings indicates a predominance of an extensional mechanism, comprising toppling, ravelling and creep-subsidence. This is interpreted to arise from relief and dilation when a pit wall is excavated, removing overburden and lateral confinement of the wall. Evidence does not support sliding and shear or shallow toppling mechanisms of instability or failure.

References:
Baczynski, N.R.P., Sheppard, I.K., Smith, K.J., Simbina, P. and Sakail, R. (2008) Toppling slope failure – Predicted versus actual, Ok Tedi, Papua New Guinea, in Proceedings First Southern Hemisphere International Rock Mechanics Symposium (SHIRMS), Y. Potvin, J. Carter, A. Dyskin and R. Jeffrey (eds), Vol. 1 – Mining and Civil, 16–19 September 2008, Perth, Western Australia, Australian Centre for Geomechanics, Perth, pp. 419–431.
Baczynski, N.R.P. (2010) Deformation rebound in a blast-damaged cutback rock slope, in Rock mechanics in civil and environmental engineering, J. Zhao, V. Labiouse, J.P. Dudt and J.F. Mathier (eds), CRC Press, pp. 605–608.
Becker, G.F. (1916) Mechanics of the Panama Canal slides, in Shorter Contributions to General Geology, D. White (ed) Washington Government Printing Office, USGS Numbered Series 1917, Vol. 98, pp. 253–261.
Blackwell, G.H. and Calder, P.N. (1982) Practical aspects of wall stability at Brenda Mines Ltd., Peachland, B.C., in Proceedings Third International Conference on Stability in Surface Mining, C.O. Brawner (ed), 1–3 June 1981, Vancouver, Canada, Society of Mining Engineers, AIME, New York, pp. 573–605.
Bridges, M. (2005) Mechanisms of instability and failure in the walls of open pit mines, Digging Deeper, AMC Consultants, June 2005, pp. 1–4.
Broadbent, C.D. (1972) The practical side of mining research at Kennecott Copper Corporation, in proceedings International Conference on Stability in Open Pit Mining British Columbia University, Centre for Continuing Education, Geotechnical practice for stability in open pit mining, in Proceedings of the second International Conference on stability in open Pit Mining, C.O. Brawner and V. Milligan (eds), 1–2 November, Vancouver, B.C., Canada, Society of Mining Engineers of the American Institute of Mining, Metallurgical, and Petroleum Engineers, New York, 1071 p.
Brummer, R.K., Li, H. and Moss, A. (2006) The transition from open pit to underground mining: an unusual slope failure mechanism at Palabora, in Proceedings International Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering, Cape Town, 3–6 April 2006, The South African Institute of Mining and Metallurgy, pp. 411–420.
Burland, J.B., Longworth, T.I. and Moore, J.F.A. (1977) A study of ground movement and progressive failure caused by a deep excavation in Oxford Clay, Geotechnique, Vol. 27, No. 4, pp. 557–591.
Calder, P.N. and Blackwell, G. (1980) Investigation of a complex rock slope displacement at Brenda Mines, CIM Bulletin, Canadian Institute of Mining, Metallurgy and Petroleum, August 1980, pp. 73–82.
Calderón, A., Catalán, A. and Karzulovic, A. (2003) Management of a 15x106 Tons Slope Failure at Chuquicamata Mine, Chile, in Soil and Rock America 2003 (39th U.S. Rock Mechanics Symposium, Cambridge, Massachusetts, June 2003), P.J. Culligan, H.H. Einstein and A.J. Whittle (eds), Essen: Verlag Glückauf, pp. 2419–2426.
Coates, D.F. (1967) The stability of slopes in open pits, in Proceedings Eighth Commonwealth Mining and Metallurgical Congress, Australia and New Zealand, 1965–1967, R.T. Madigan (ed), Australasian Institute of Mining and Metallurgy, Melbourne, Vol. 6, pp. 543–550.
Coates, D.F. and Yu, Y.S. (1978) Block flow slope instability, CANMET Report 78–10, Canadian Centre for Mineral and Energy Technology.
Coulthard, M.A., Dugan, K.J. and Hutchison, B.J. (1999) Numerical modelling of complex slope movements at Savage River Mine, Tasmania, Mining One Consultants, viewed 29 April 2013, www.miningone.com.au.
Cremeens, J. (2003) Geological controls on complex slope displacement at the pitch reclamation project, D.D. Boyer, P.M. Santi and W.P. Rogers (eds), Engineering Geology in Colorado: Contributions, Trends, and Case Histories: AEG Special Publication 15, Colorado Geological Survey Special Publication, Vol. 55, CD-Rom only.
Cremeens, J., Gilbride, L., Cellan, R. and Cox, A. (2000) Numerical simulation of complex slope displacement, in Proceedings 4th North American Rock Mechanics Symposium, Pacific Rocks 2000: Rock Around the Rim, 31 July–3 August 2000.
Day, A. and Seery, J. (2007) Monitoring of a large wall failure at Tom Price iron ore mine, in Proceedings International Symposium on Rock Slope Stability in Open Pit Mining and Civil Engineering (Slope07), Y. Potvin (ed), 12‒14 September 2007, Perth, Australia, Australian Centre for Geomechanics, Perth, pp. 333–340.
Feltus, W.R. (1993) Victorious East failure at Ora Banda - a case study, in Proceedings Geotechnical instrumentation and monitoring in open pit and underground mining, T. Szwedzicki (ed), Kalgoorlie, Western Australia, Rotterdam, Balkema, 21–23 June.
Gloe, C.S., James, J.P. and Barton, C.M. (1971) Geotechnical investigations for slope stability studies in brown coal open cuts, in Proceedings 1st Australian-New Zealand Conference on Geomechanics, Vol. 1, pp. 329–336.
Gloe, C.S., James, J.P. and McKenzie, R.J. (1973) Earth movements resulting from brown coal open cut mining – Latrobe Valley, Victoria, in Proceedings 11th Symposium on Subsidence in Mines, Wollongong, Australia.
Graham, H.L. (1989) Description of a slope failure in the Vanderbijl pit, Thabazimbi, caused by underground mining activities, in Proceedings Rock Slope Stability Symposium, 10 March, South Africa, The Group, South Africa, pp. 22–27.
Grimes, G. and Nowell, R. (1995) Fatal Fall of Highwall Accident, United States Department of Labor Mine Safety and Health Administration, Rocky Mountain District, Metal and Nonmetal Mine Safety and Health, Accident investigation report, Surface Mine Metal, I.D. No. 39–01284 X52.
Hencher, S.R., Liao, Q.H. and Monaghan, B.G. (1996) Modelling slope behaviour for open-pits, Transactions of the Institution of Mining and Metallurgy, Section A: Mining technology, London: The Institution, pp. 37–47.
Hoek, E. (1972) Recent Rock Slope Stability Research at the Royal School of Mines, London, C.O. Brawner and V. Milligin (eds), Geotechnical practice for stability in open pit mining, The American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc., New York, 1972, p. 27.
Hoek, E., Read, J., Karzulovic, A. and Chen, Z.Y. (2000) Rock Slopes in Civil & Mining Engineering, in Proceedings GeoEng 2000, International Conference on Geotechnical & Geological Engineering, 19–24 November 2000, Melbourne, Pennsylvania: Technomic Publishing, pp. 643–658.
Hutchison, B., Dugan, K. and Coulthard, M. (2000) Analysis of flexural toppling at Australian Bulk Minerals Savage River Mine, in Proceedings GeoEng 2000, International Conference on Geotechnical & Geological Engineering, 19–24 November 2000, Melbourne, Pennsylvania: Technomic Publishing.
Joass, G.G. (1993) Stability monitoring on the west wall of the Muja open cut, in Proceedings Geotechnical Instrumentation and Monitoring in Open Pit and Underground Mining, T. Szwedzicki (ed), Kalgoorlie, Western Australia, Balkema, Rotterdam, pp. 283–291.
Kennedy, B.A. and Niermeyer, K.E. (1970) Slope monitoring systems used in the prediction of a major slope failure at the Chuquicamata Mine, Chile, in Planning Open Pit Mines, in Proceedings International Symposium on the theoretical background to the planning of open pit mines with special reference to slope stability, P.W.J. Van Rensburg (ed), Balkema, Cape Town, South Africa, pp. 215–225.
Mallett, C.W. (1982) Sedimentological control of mining conditions in the Permian coal measures of the Bowen Basin, Australia, in Proceedings Third International Conference on Stability in Surface Mining, C.O. Brawner (ed), 1–3 June, Vancouver, Canada, Society of Mining Engineers of the American Institute of Mining, Metallurgical, and Petroleum Engineers, pp. 333–346.
Merrill, R.H. (1968) Bureau contribution to slope angle research at the Kimbley Pit, Ely, Nevada, Transactions of the Society of Mining Engineers, Vol. 241: 4, pp. 513–525.
Miller, V. (1982) The northeast Tripp slide at Kennecott’s Nevada Mine division, Stability in Surface Mining, C.O. Brawner (ed), American Institute of Mining, Metallurgical and Petroleum Engineers, New York.
Moss, A., Diachenko, S. and Townsend, P. (2006) Interaction between the block cave and the pit slopes at Palabora Mine, in Proceedings International Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering, Cape Town,
3–6 April 2006, The South African Institute of Mining and Metallurgy, pp. 399–409.
Naismith, W.A. and Wessels, S.D.N. (2005) Management of a major slope failure at Nchanga Open Pit, Chingola, Zambia, The Journal of the South African Institute of Mining and Metallurgy, Vol. 105, pp. 619–626.
National Academy of Sciences (1924) Report of the Committee of the National Academy of Sciences on Panama Canal Slides, Volume 28, Government Printing Office, Washington.
Newcomen, H.W. and Martin, D.C. (1988) Geotechnical assessment of the southeast wall slope failure at Highmont Mine, British Columbia, CIM Bulletin, Canadian Institute of Mining, Metallurgy and Petroleum, Vol. 81:917, pp. 71–76.
Newcomen, H.W. and Shwydiuk, L. (2003) Managing pit slope displacements: Highland Valley Copper’s Lornex pit southwest wall, CIM Bulletin, Canadian Institute of Mining, Metallurgy and Petroleum, Vol. 96:1071, pp. 43–48.
Rapiman, M. (1993) Slope stability and rock mechanics analyses Chuquicamata mine, Codelco, Chile, in Innovative Mine Design for the 21st Century, in Proceedings of the International Congress On Mine Design, W.F. Bawden, J.F. Archibald (eds), August 1993, Kingston, Ontario, Canada, Rotterdam, Netherlands, A.A. Balkema, pp. 23–26.
Read, J.R.L. (2003) Risk and accepted practice in open pit mining geomechanics, in Fifth Large Open Pit Conference, November 2003, Kalgoorlie, Australia, Australasian Institute of Mining & Metallurgy, Publication Series No7/2003, pp. 3–5.
Reid, G. and Stewart, D. (1986) A large scale toppling failure at Afton, in Proceedings International Symposium on Geotechnical Stability in Surface Mining, 6–7 November 1986, Calgary, AB, Canada, A.A. Balkema, Rotterdam, pp. 215–223.
Rose, N.D. and Hungr, O. (2007) Forecasting potential rock slope failure in open pit mines using the inverse-velocity method, International Journal of Rock Mechanics & Mining Sciences, Vol. 44, pp. 308–320.
Rose, N.D. and Sharon, R.P. (2000) Practical rock slope engineering designs at Barrick Goldstrike, in Proceedings Slope Stability in Surface Mining, W. Hustrulid, M.K. McCarter and D. Van Zyl (eds), SME, Colorado, pp. 213–218.
Rosengren, K.J. and Krehula, F.J. (1967) Earth movements and batter stability in the Latrobe Valley open cuts, in Proceedings Eighth Commonwealth Mining and Metallurgical Congress, Australia and New Zealand, 1965–1967, R.T. Madigan (ed), Australasian Institute of Mining and Metallurgy, Melbourne, Vol. 6, pp. 573–585.
Sharp, J.C., Lemay, C. and Neville, B. (1987) Observed behaviour of major open pit slopes in weak ultrabasic rocks, in Proceedings 6th International Congress on Rock Mechanics, G. Herget and S. Vongpaisal (eds), 30 August–3 September 1987, Montreal, Canada, A.A. Balkema, Rotterdam, pp. 541–550.
Sharon, R. (2001) Slope Stability and Operational Control at Barrick Goldstrike, in Proceedings Slope Stability in Surface Mining, W.A. Hustrulid, M.K. McCarter and S.J.A. Van Zyl (eds), Society for Mining Metallurgy, Englewood, USA, pp. 219–226.
Simmons, J.V. (2000) New rock mechanics models needed for slope stability in open pit coal mines, in proceedings of the GeoEng 2000, International Conference on Geotechnical & Geological Engineering, 19–24 November 2000, Melbourne, Technomic Publishing, Pennsylvania.
Stacey, T.R. and Xianbin, Y. (2004) “Extension” in large open pit slopes and possible consequences, in Proceedings Massmin 2004, M.A. Alfaro and A. Karzulovic (eds), 22–25 August 2004, Santiago, Chile, Mineria Chilena, pp. 280–285.
Thompson, P.W. and Cierlitza, S. (1993) Identification of a Slope Failure Over a Year before Final Collapse Using Multiple Monitoring Methods, Geotechnical Instrumentation and Monitoring in Open Pit and Underground Mining, T. Szwedzicki (ed.), A.A. Balkema, Rotterdam, Netherlands, pp. 491–511.
Voight, B. and Kennedy, B.A. (1979) Slope failure of 1967-1969, Chuquicamata Mine, Chile. In Rockslides and Avalanches, B. Voight (ed), Elsevier Scientific Publishing Company, Amsterdam, pp. 595–632.
Wessels, S.D.N. (2009) Monitoring and management of a large open pit failure, Master’s thesis, University of Witwatersrand, Johannesburg.
Victorian Government (2008) Mining Warden Yallourn Mine Batter Failure Inquiry, Victorian Government Printer, No 156 Session 2006–2008.
Zavodni, Z.M. and McCarter, M.K. (1977) Main Hill slide zone, Utah Copper Division, in Proceedings Monograph 1 on Rock Mechanics Applications in Mining, 17th US Symposium on Rock Mechanics, 25–27 August 1976, Snow Bird, USA, American Rock Mechanics Association, Virginia, pp. 84–92.




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