Authors: Sjöberg, J; Perman, F; Quinteiro, C; Malmgren, L; Dahnér-Lindkvist, C; Boskovic, M


DOI https://doi.org/10.36487/ACG_rep/1201_26_sjoberg

Cite As:
Sjöberg, J, Perman, F, Quinteiro, C, Malmgren, L, Dahnér-Lindkvist, C & Boskovic, M 2012, 'Numerical analysis of alternative mining sequences to minimise the potential for fault slip rockbursting', in Y Potvin (ed.), Proceedings of the Sixth International Seminar on Deep and High Stress Mining, Australian Centre for Geomechanics, Perth, pp. 357-372, https://doi.org/10.36487/ACG_rep/1201_26_sjoberg

Download citation as:   ris   bibtex   endnote   text   Zotero


Abstract:
Mining in the production area ‘Block 19’ in the LKAB Kiirunavaara Mine has resulted in extensive seismic activity and several serious rockfalls. This paper describes a modelling study aimed at quantifying the seismic potential for future mining of Block 19, considering several different mining sequences. A 3D discontinuum model was used, in which geological structures were included explicitly to simulate the development of fault slip seismic events. Four different mining sequences were simulated —three of which involved leaving the whole, or part of, Block 19 as an unmined pillar. Mining was simulated from the current active mining level and for a production period of more than 20 years ahead in time. The results were evaluated in terms of stress influences on critical infrastructure in the footwall of Block 19 and, more importantly, the possible extent of fault slip seismic events due to mining (by calculating seismic moments). The results showed that leaving a pillar in Block 19 may be less desirable as higher seismic moments will develop in the final mining stages. However, continued mining without a pillar will also likely result in an increased seismic activity in Block 19, which needs to be addressed appropriately. Block 19 should be mined prior to the neighbouring production areas, but additional and more detailed numerical modelling may be needed to fine-tune the extraction sequence for each level mined.

References:
Andrieux, P., Zhu, H., Labrie, D., Doucet, C., Lampron, S. and Fleury, D. (2004) Determination and validation of the rock mass post-peak mechanical properties for a 3DEC strain-softening model of the 680 sill pillar at Louvicourt mine, in Proceedings First International Symposium on UDEC/3DEC, September 29–October 1, 2004, Bochum.
Andrieux, P.P. (2010) Numerical Modelling and High Stress Mining Situations, Presentation at Fifth International Seminar on Deep and High Stress Mining (Deep Mining 2010), M. Van Sint Jan and Y. Potvin (eds), 6–8 October 2010, Santiago, Chile.
Andrieux, P.P., Hudyma, M.R., O’Connor, C.P., Li, H., Cotesta, L. and Brummer, R.K. (2008) Calibration of large-scale three-dimensional non-linear numerical models of underground mines using microseismic data, in Proceedings First International FLAC/DEM Symposium on Numerical Modeling, August 25–27 2008, Minneapolis, Itasca Consulting Group, Inc., Minneapolis, pp. 343–350.
Beck, D.A., Pfitzner, M.J., Arndt, S.M. and Fillery, B. (2009) Estimating rock mass properties and seismic response using higher order, discontinuous, Finite Element models, Beck Engineering, viewed 21 May 2010, BAE_PAPER2009_BECK_AND_PFITZNER_ET_AL_V4.pdf.
Board, M. (1994) A Summary of the Thesis, Numerical Examination of Mining-Induced Seismicity, University of Minnesota, December 1994, International Society of Rock Mechanics (ISRM), viewed May 20 2010,
1156442864rocha_medal_1996_board_summary.pdf.
Board, M. (1996) Numerical examination of mining-induced seismicity, in Proceedings Eurock ’96, Prediction and Performance in Rock Mechanics and Rock Engineering, 2–5 September 1996, Torino, A.A. Balkema, Rotterdam, Vol. 3, pp. 1469–1486.
Buss, B. (2010) The Use of Modelling at Underground Mines, Presentation at the CEMI and Queen’s University Seminar: Recent Developments in Modeling, Data Integration and Mine Planning in Fault Slip-prone Deep Mines, Centre for Excellence in Mining Innovation (CEMI), viewed May 20 2010, _modeling/links/BBuss.pdf.
CAMIRO (1996). Canadian Rockburst Research Program 1990 – 1995, Book 2, Volume 4: Numerical Modelling & Case Histories, CAMIRO Mining Division.
Hildyard, M.W., Napier, J.A.L., Spottiswoode, S.M., Sellers, E., Linzer, L.M. and Kataka, M.O. (2006) New criteria for rockmass stability and control using integration of seismicity and numerical modelling, SIMRAC (Safety in Mines Research Advisory Committee) Final Project Report, Project No: SIM 02 03 01, January 2006, viewed May 20 2010, .
Hofmann, G. (2010) Simulating fault slip areas of mining induced seismic tremors using static boundary element numerical modelling, in Proceedings Fifth International Seminar on Deep and High Stress Mining (Deep Mining 2010), M. Van Sint Jan and Y. Potvin (eds), 6–8 October 2010, Santiago, Chile, Australian Centre for Geomechanics, Perth, pp. 395–412.
Itasca (2007) 3DEC, Version 4.10, Manual, Itasca Consulting Group, Inc., Minneapolis.
Kværna, T. and Gibbons, S. (2011) Beräkning av seismiskt moment för händelser i Block 19, LKAB Utredning 11-703E, 2011-01-04 (in Swedish).
Malmgren, L. and Nordlund, E. (2006) Behaviour of shotcrete supported rock wedges subjected to blast-induced vibrations, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, Vol. 43, pp. 593–615.
Mungur, G.D. (2005) An Evaluation of the Seismic Hazard Prior to the Extraction of a Shaft Pillar at Kloof Gold Mine, Controlling Seismic Risk, in Proceedings Sixth International Symposium on Rockburst and Seismicity in Mines (RaSiM6), Y. Potvin and M. Hudyma (eds), 9–11 March 2005, Perth, Australia, Australian Centre for Geomechanics, Perth, pp. 453–460.
O’Connor, C., Cotesta, L., Brummer, R. and Thibodeau, D. (2010) Non-linear modelling calibration process for Vale Nickel Mines Ontario Division, in Proceedings Fifth International Seminar on Deep and High Stress Mining (Deep Mining 2010), M. Van Sint Jan and Y. Potvin (eds), 6–8 October 2010, Santiago, Chile, Australian Centre for Geomechanics, Perth, pp. 521–536.
Potvin, Y., Jarufe, J. and Wesseloo, J. (2010) Interpretation of seismic data and numerical modelling of fault reactivation at El Teniente, Reservas Norte sector, in Proceedings of the Second International Symposium on Block and Sublevel Caving (Caving 2010), 20–22 April 2010, Perth, Australia, Australian Centre for Geomechanics, Perth, pp. 483–493.
Ryder, J.A. (1987) Excess shear stress (ESS): An engineering criterion for assessing unstable slip and associated rockburst hazards, in Proceedings Sixth International Congress on Rock Mechanics, Montreal, A.A. Balkema, Rotterdam, Vol. 3, pp. 1211–1215.
Ryder, J.A. (1988) Excess shear stress in the assessment of geologically hazardous situations, Journal of the South African Institute of Mining and Metallurgy, Vol. 88, No. 1, January 1988, pp. 27–39.
Salamon, M.D.G. (1993) Keynote address: Some applications of geomechanical modelling in rockburst and related research, in Proceedings 3rd International Symposium on Rockbursts and Seismicty in Mines, 16–18 August 1993, Kingston, Ontario, A.A. Balkema, Rotterdam, pp. 297–309.
Sandström, D. (2003) Analysis of the Virgin State of Stress at the Kiirunavaara Mine, Licentiate thesis 2003:02, Luleå University of Technology, Luleå, Sweden.
Sjöberg, J. and Malmgren, L. (2008) New haulage level at Kiirunavaara – rock mechanics challenges and analyses, in Proceedings 5th International Conference and Exhibition on Mass Mining, MassMin 2008, H. Schunnesson and E. Nordlund (eds), 9–11 June 2008, Luleå, Sweden, Luleå University of Technology Press, Luleå, pp. 729–838.
Sjöberg, J., Dahnér, C., Malmgren, L. and Perman, F. (2011) Forensic analysis of a rock burst event at the Kiirunavaara Mine — results and implications for the future, Continuum and Distinct Element Numerical Modeling in Geomechanics—2011, in Proceedings 2nd International FLAC/DEM Symposium, February 14–16, 2010, Melbourne, Itasca International Inc., Minneapolis, pp. 67–74.
Sjöberg, J., Lundman, P., Nordlund, E. and Quinteiro, C. (2003) Stability analysis of ore passes in the Kiirunavaara Mine, in International Society for Rock Mechanics, 10th Congress, Technology roadmap for Rock Mechanics, September 8–12, 2003, Johannesburg, The South African Institute of Mining and Metallurgy, Johannesburg, Symposium Series S33, Vol. 2, pp. 1093–1098.
van Aswegen, G. (2005) Routine Seismic Hazard Assessment in Some South African Mines, Controlling Seismic Risk, in Proceedings Sixth International Symposium on Rockburst and Seismicity in Mines (RaSiM6), Y. Potvin and M. Hudyma (eds), 9–11 March 2005, Perth, Australia, Australian Centre for Geomechanics, Perth, pp. 437–444.




© Copyright 2021, Australian Centre for Geomechanics (ACG), The University of Western Australia. All rights reserved.
Please direct any queries or error reports to repository-acg@uwa.edu.au