1 Jul 2017
1 Dec 2017 (Extended to 10 Jan 2018)
15 Jan 2018
16 Apr 2018 (Extended to 15 Jun 2018)
From 16 July 2018
By 17 September 2018
Young Researcher Plenary
Université Laval, Canada
Thu-01 Nov 2018 | 09:55 – 10:15 | Summit 2
"Properties of Large-scale Geological Features and Seismic Responses Affecting Strainburst Potential in Deep Underground Mines"
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 Â± 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.
Mrs. Audrey Goulet completed a bachelor degree in Engineering Geology in 2016 at Université Laval, Canada. During her studies, she completed internships at Canadian Malartic Mine, an open pit operation in Canada, and at the Research Institute on Mines and Environment at UQAT (Université du Québec en Abitibi-Témiscamingue). At Canadian Malartic, her fieldwork focussed on monitoring blast movement in the production geology department. Her research work at UQAT aimed at characterizing hydrogeological properties of a new geomaterial for mine tailings ponds rehabilitation in northern Canada.
She completed her Master degree at Université Laval earlier this year. Her research project was done in collaboration with an industrial partner, the LaRonde mine in Quebec, Canada. The contribution of the thesis was on the development of an integrated geomechanical model and associated analysis tools for a deep underground mine. She was awarded a research grant for the excellence of her dossier by the Québec provincial government.
She is currently pursuing her graduate studies at the PhD level at the same institution, looking at improving our understanding on seismic and aseismic response to mining in deep hard rock underground mines.