Advanced seismological analysis of a complex seismic event at LaRonde mine

Authors: Meyer, S; Durham, C; Falmagne, V

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DOI https://doi.org/10.36487/ACG_repo/2465_18

Cite As:
Meyer, S, Durham, C & Falmagne, V 2024, 'Advanced seismological analysis of a complex seismic event at LaRonde mine', in P Andrieux & D Cumming-Potvin (eds), Deep Mining 2024: Proceedings of the 10th International Conference on Deep and High Stress Mining, pp. 355-372, https://doi.org/10.36487/ACG_repo/2465_18

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Abstract:
The LaRonde mine has been in continuous operation since 1988, with mining undertaken from near surface to a current depth of 3,260 m, and reserves and resources extending deeper. Over the past decade mininginduced seismicity at great depths has become a significant challenge at LaRonde. Strategic and tactical control measures have been successfully implemented to manage seismic risks and promote a safe working environment. As mining progresses ever deeper, the enhanced analysis of seismic data can support a more comprehensive understanding of the increased dynamic responses of rock masses and structural behaviours subject to varying stresses and deformations induced by mining. This advanced understanding is needed to continue to improve the mine design, optimise ground support schemes and plan the ore extraction sequence, thereby contributing to the management of seismic risk. In August 2023 the mine experienced a significant seismic event around the 317–320 levels of the East mine. Bulking and excavation damage were observed in multiple locations, some away from the initially processed event location. An advanced seismic analysis was undertaken to help understand and explain the processes and observations associated with the event. Seismic data from a regional network on the surface was combined with that from the in-mine system to improve seismic source parameter estimates. The recorded waveforms contain multiple phases, indicating a complex event driven by more than a single failure mechanism occurring over an extended volume. A finite source inversion was undertaken to provide a more realistic description of the source process, how it is distributed in space and how it evolved in time. The findings illustrate that large seismic events in mines need to be considered as regions of deformation where the failure mechanisms can vary and that traditional approaches, such as a point source approximation and peak ground velocity-focused analyses, are inadequate for such scenarios.

Keywords: seismicity, rockburst, moment tensor, finite source inversion, mining-induced seismicity

References:
Bent, AL 2011, ‘Moment magnitude (MW) conversion relations for use in hazard assessment in eastern Canada’, Seismological Research Letters, vol. 82, no. 6, pp. 984–990,
Boore, DM 1986, ‘The effect of finite bandwidth on seismic scaling relationships’, Earthquake Source Mechanics, American Geophysical Union.
Boskovic, M 2022, ‘Challenges of resuming the production after a major seismic event at LKAB’s Kiirunavaara mine’, in MS Diederichs (ed.), Proceedings of the 10th International Conference on Rockbursts and Seismicity in Mines, Society for Mining, Metallurgy & Exploration, Englewood.
Cai, M & Kaiser, PK 2018, Rockburst Support Reference Book, vol. 1, MIRARCO Mining Innovation, Sudbury.
Chounet, A, Vallée, M, Causse, M & Courboulex, F 2018, ‘Global catalog of earthquake rupture velocities shows anticorrelation between stress drop and rupture velocity’, Tectonophysics, vol. 733, pp. 148–158,
j.tecto.2017.11.005
Corthesy, R 2006, Détermination des Contraintes in situ aux Niveaux Inférieurs des Mines Agnico-Eagle, draft report, Division Mine LaRonde.
DGI Geoscience Inc. 2017, LaRonde – Stress Inversion Study and Acoustic Televiewer Surveys (Technical Report L–434).
Gibowicz, SJ & Kijko, A 1994, ‘Chapter 11: seismic spectra and source parameters’, An Introduction to Mining Seismology, Academic Press, New York,
Goulet, A, Grenon, M, Woodward, K, Wesseloo, J & Morissette, P 2018a, ‘Development of an integrated geotechnical database and associated analysis tools for excavation design in seismically active underground mines’, Proceedings of the 52nd U.S. Rock Mechanics/Geomechanics Symposium.
Goulet, A, Grenon, M, Morissette, P, Woodward, K & Wesseloo, J 2018b, ‘Properties of large-scale geological features and seismic responses affecting strainburst potential in deep underground mines’, Proceedings of the 10th Asian Rock Mechanics Symposium.
Hanks, TC & Kanamori, H 1979, ‘A moment magnitude scale’, Journal of Geophysical Research: Solid Earth, vol. 84, no. B5,
pp. 2348–2350,
Hoek, E 1994, ‘Strength of rock and rock masses’, International Society for Rock Mechanics News Journal, vol. 2, no. 2, pp. 4–16
Ide, S 2007, ‘Slip inversion’, in G Schubert (ed.), Treatise on Geophysics, Volume 4: Earthquake Seismology, pp. 193–223.
Kaiser, PK & Moss, A 2022, ‘Deformation-based support design for highly stressed ground with a focus on rockburst damage mitigation’, Journal of Rock Mechanics and Geotechnical Engineering, vol. 14, no. 1, pp. 50–66,
j.jrmge.2021.05.007
Karampinos, E, Hadjigeorgiou, J, Hazzard, J & Turcotte, P 2015, ‘Discrete element modelling of the buckling phenomenon in deep hard rock mines’, International Journal of Rock Mechanics and Mining Sciences, vol. 80, pp. 346–356,
Malovichko, D 2020, ‘Description of seismic sources in underground mines: theory’, Bulletin of the Seismological Society of America, vol. 110, no. 5, pp. 2124–2137,
Malovichko, D, Cuello, D & Rojas, E 2018, ‘Analysis of damaging seismic event on 24 December 2011 in the Pilar Norte sector of El Teniente 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. 637–650,
1815_49_Malovichko
Malovichko, D & Rigby, A 2022, ‘Description of seismic sources in underground mines: dynamic stress fracturing around tunnels and strainbursting’, ARxiv,
McGarr, A 1991, ‘Observations constraining near-source ground motion estimated from locally recorded seismograms’, Journal of Geophysical Research: Solid Earth, vol. 96, no. 91.
Mendecki, AJ 2016, Mine Seismology Reference Book: Seismic Hazard, Institute of Mine Seismology, Kingston,
Monecke, T, Mercier-Langevin, P, Dubé, B & Frieman, BM 2017, Geology of the Abitibi greenstone belt, in T Monecke, P MercierLangevin, & B Dubé (eds.), Archean Base and Precious Metal Deposits, Southern Abitibi Greenstone Belt, Canada, vol. 19,
National Resources Canada 2024, Search the Earthquake Database, viewed 17 May 2024,
Nordström, E, Dineva, S & Nordlund, E 2017, ‘Source parameters of seismic events potentially associated with damage in block 33/34 of the Kiirunavaara mine (Sweden)’, Acta Geophysica, vol. 65, no. 6, pp. 1229–1242,
Olson, A & Apsel, R 1982, ‘Finite faults and inverse theory with applications to the 1979 Imperial Valley earthquake’, Bulletin of the Seismological Society of America, vol. 72, pp. 1969–2001.
Ouellet, A, Seguineau de Preval, C & Andrieux, P 2024, LaRonde Mine – Numerical Modelling and Risk Analysis (Technical Report 2253LAR-007-R-20240409-F) A2GC, Montréal
Sasseville, G, Turcotte, P & Falmagne, V 2022, ‘Control measures to manage seismic risk at the LaRonde mine, a deep and seismically active operation’, Proceedings of the 56th U.S. Rock Mechanics/Geomechanics Symposium,
Sonley, E & Atkinson, GM 2005, ‘Empirical relationship between moment magnitude and Nuttli magnitude for small-magnitude earthquakes in southeastern Canada’, Seismological Research Letters, vol. 76, no. 6, pp. 752–755,
10.1785/gssrl.76.6.752
Vavryčuk, V & Kühn, D 2012, ‘Moment tensor inversion of waveforms: a two-step time-frequency approach’, Geophysical Journal International, vol. 190, no. 3, pp. 1761–1776,
Wesseloo, J, Hudyma, MR & Harris, P 2011, ‘A community based seismic system for obtaining regional and local seismic data of strategic importance’, in Y Potvin (ed.), Strategic versus Tactical 2011: Proceedings of the Fourth International Seminar on Strategic versus Tactical Approaches in Mining, Australian Centre for Geomechanics, Perth, pp. 159–168,




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