Global Approach for Managing Deep Mining Hazards
Rock Engineering 2009 - Rock Engineering in Difficult Conditions
Benoit Valley, Steve Runnalls, Yurek Krynicki, Jeff Whitney, Kevin Beauchamp, Luiz Castro,
Mining rockburst hazards can be divided into two categories depending on the underlying energy release mechanism; (1) fault slip; or (2) strain burst. Strain bursting events are typically related to competent rock masses under high loading conditions while fault slip type events are associated with the release of energy on stressed, large scale structural features. These features are driven to failure due to complex interaction between mining induced stress changes and kinematics with mine openings and other structural features. Such interactions were shown to potentially lead to the occurrence of fault slip type failure in unexpected areas within and at distances >200m away from active mining areas at Garson Mine. In order to diagnose and then mitigate associated risks, an integrated approach using diverse sources of data as well as numerical analysis was needed to gain insight into the mechanisms behind the complex interactions leading to the occurrence of fault slip rockbursts. This paper discusses the use of a Global or Integrated Approach at Garson Mine (Sudbury, Canada) and the resulting value obtained for creating an engineering geology model which has allowed for improved mine planning and Risk mitigation strategies to be implemented.