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contour mining

Surface mining that progresses in a narrow zone following the outcrop of a coal seam in mountainous terrain, and the overburden, removed to gain access to the mineral commodity, is immediately placed in the previously mined area, such that reclamation is carried out contemporaneously with extraction.

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  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 分数
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