At Troy Mine, a progression of pillar failures led to surface subsidence. Itasca back-analyzed this behavior, using a large-scale numerical model, to understand the level of stresses and failure mechanism leading to the collapse of some pillars. Forward predictions on pillar stability in another nearby deposit, in a similar geomechanical setting, were also done.
Mr. Christianson has more than 40 years of experience in the development and application of numerical models in geomechanics and mining engineering. He also is experienced in the installation and data analysis for various rock-stress and displacement measuring devices.
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