Developing a numerical modelling methodology for assessing burst potential in deep hard rock mines
| Reference number | |
| Coordinator | Luleå tekniska universitet - Avdelningen för geoteknologi |
| Funding from Vinnova | SEK 479 800 |
| Project duration | August 2017 - June 2018 |
| Status | Completed |
| Venture | The strategic innovation programme for Swedish mining and metal producing industry - SIP Swedish Mining Innovation |
Purpose and goal
The aim of this project was achieved. Numerical methodology used to assess burst potential for discontinues in deep underground mines was developed by implementing the loading stiffness concept. A modelling-based burst assessment procedure for the Kiirunavaara underground mine was proposed. By implementing the methodology in practice, the number of production disturbances, and the risk for personnel injury and production losses could be reduced.
Expected results and effects
The expected results from this project comprise a calibrated numerical modelling methodology at mine scale, and a modelling-based burst assessment procedure for the Kiirunavaara underground mine.
Planned approach and implementation
The study comprised: collecting historical rockburst events, establishing the numerical technique, calibrating the numerical modelling methodology and developing the burst potential assessment procedure. More than fifty damaging seismic events were collected and statistically analyzed. Two of them were used in model calibration. The numerical technique was tested in two dimensions and then upgraded to three dimensions. The results from parametric analyses were integrated. A procedure was proposed for evaluating burst potential for the Kiirunavaara underground mine.