Geotechnical Factors Associated With Previously Mined Areas of Coal and Their Impact on Subsequent Extraction
Masters research on pillar extraction in the Witbank Coalfield, ranking the ground conditions that decide method choice and safety, for rock engineers and mine planners.
Geotechnical factors affecting secondary extraction were identified from interviews with collieries already re-mining pillars and with people experienced in stooping, then quantified and ranked against the different aspects of the work. No single factor governs the outcome. Factors interact, so choosing a method and working safely in old workings depends on managing them together across disciplines.
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