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Lesley Sharon Jeffrey

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  Lesley Sharon Jeffrey

  2002

  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.

  What this report foundGeotechnical factors affecting secondary extraction were identified from interviews with collieries already re-mining pillars and with people experienced in...

  Geology and Geophysics

  Geotechnical Factors Associated With Previously Mined Areas of Coal and Their Impact on Subsequent Extraction

  R1500,00 Add to basket