Mikula, PA & Lee, MF 2007, 'Empirical Performance Chart for Ground Support in Seismic Conditions at Mt Charlotte', in Y Potvin (ed.), Proceedings of the Fourth International Seminar on Deep and High Stress Mining
, Australian Centre for Geomechanics, Perth, pp. 325-334.
Methods of estimating dynamic-capable ground support requirements from first principles are limited by the
complexities of seismic event mechanisms, the susceptibility of excavations to damage and the behaviour of
ground support systems. Some of these complexities were bypassed at the Mt Charlotte gold mine by
adopting an alternative site-specific empirical approach, based on underground observations of seismic
damage and the performance of ground support.
Relationships were derived between peak particle velocity due to seismicity, the energy absorption capacity
of ground support systems, and the damage occurring in excavations. A ground support design chart was
developed for dynamic situations to enable estimation of the minimum required energy absorption capacity
for ground support. Alternatively, given a particular seismic event magnitude and location, the chart can be
used to indicate likely ground support performance in dynamic situations, in terms of the expected damage to
The chart has been successfully applied to assess dynamic ground support requirements in development used
to mine remnants in the seismically active ROB5 stoping block. A key advantage of this empirical approach
is that it is calibrated to the peculiarities of the specific mine site.
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Empirical Performance Chart for Ground Support in Seismic Conditions at Mt Charlotte P.A. Mikula, M.F. Lee
334 Deep Mining 07, Perth, Australia