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.
Original language | English |
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Title of host publication | ISRM International Symposium - 10th Asian Rock Mechanics Symposium, 29 October - 3 November, Singapore |
Place of Publication | Singapore |
Publisher | International Society for Rock Mechanics and Rock Engineering |
Number of pages | 12 |
ISBN (Electronic) | 978-981-11-9003-2 |
Publication status | Published - Nov 2018 |
Event | 10th Asian Rock Mechanics Symposium: The ISRM International Symposium for 2018 - Singapore, Singapore, Singapore Duration: 29 Oct 2018 → 3 Nov 2018 |
Conference
Conference | 10th Asian Rock Mechanics Symposium |
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Country/Territory | Singapore |
City | Singapore |
Period | 29/10/18 → 3/11/18 |