Properties of large-scale geological features and seismic responses affecting strainburst potential in deep underground mines

Authors: Goulet, AudreyGrenon, Martin; Morissette, P.; Woodward, Kyle; Wesseloo, Johan
Abstract: Strainburst refers to local small seismic events generating shallow spalling with violent ejection of fragments in an active development heading. This rockburst category may affect worker safety and mine productivity. This paper conducts a preliminary study investigating properties of large-scale geological features, mine operational context, and both aseismic and seismic responses generating strainbursts. Using the LaRonde mine as a case study, key parameters influencing strainburst occurrence and severity are defined and highlighted. The distance to a lithological contact and the orientation of the drift are parameters that affect strainburst potential and severity at LaRonde. The analysed bursts were seismically triggered or self-initiated. The analysed seismic events generating strainbursts had a local magnitude of-0.7 ± 0.5 on average and were located between 3 and 58 meters from the damage. Finally, strainbursts mostly occur within five days after a development blast.
Document Type: Article de recherche
Issue Date: 1 November 2018
Open Access Date: Restricted access
Document version: AM
This document was published in: 10th Asian Rock Mechanics Symposium
Société internationale de mécanique des roches
Collection:Autres articles publiés

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