Development of a new methodology for evaluating rock support performance in seismically active mines

Reference number
Coordinator Luleå tekniska universitet - Institutionen för samhällsbyggnad och naturresurser
Funding from Vinnova SEK 4 850 000
Project duration September 2014 - February 2018
Status Completed
Venture The strategic innovation programme for mining and metal recovery – STRIM

Purpose and goal

The aim of this project was achieved. Methodologies used to find reliable relationships between the seismic source and the damages to the excavations and the rock support were developed. In detail, new methods for evaluating rock support performance, forensic evaluation, and for identifying dynamic demand on rock support were developed. By implementing the methodologies in practice, the number of production disturbances, and the risk for personnel injury and production losses could be reduced.

Expected results and effects

A forensic manual which can serve as a main guideline for future forensic investigation of rockbursts. Monitoring methodology/procedures for instrumentation design. Methodology for analysis of seismic data for large damaging events. Methodology, software and numerical model for determination of wave attenuation and scaling law in near- and far-field. Numerical modelling methodologies for investigating response of underground openings and its rock support system to seismic loading. New ground control strategies in Swedish seismically active mines.

Planned approach and implementation

The study comprised: forensic investigation, field monitoring and analysis. Six damaging seismic events were investigated by using an innovative method, namely forensic investigation. Different types of instrumentation were installed at three mines and four damaging seismic events occurred at/near the instrumented sites. The results from the forensic investigations combined with the field monitoring data were analysed and integrated to develop new methods to evaluate the rock support performance.

The project description has been provided by the project members themselves and the text has not been looked at by our editors.

Last updated 25 November 2019

Reference number 2014-01944

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