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Bord And Pillar Coal Mining Ppt

Oct 22, 2014nbsp018332Room Bord-and-Pillar Layout Figure shows Room and Pillar Mining 6. Underground mining room-and-pillar mining of thick seams Benching Different approaches allow either the top or bottom part of the seam to be mined out first. Note the hangingwall is above the mining cavity, and the footwall is below it.

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