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Open Cast Mining

  • Open-pit mining, also known as opencast mining, open-cut mining, and strip mining,
  • means a process of digging out rock or minerals from the earth by their elimination from an open pit or borrow.
  • The word is used to distinguish this type of mining from extractive methods that need tunneling into the earth.
  • Open-pit mines are used when deposits of commercially helpful minerals or rock are found close to the surface; that is, where the overburden (layer material covering the valuable deposit) is comparatively thin or the material of interest is structurally inappropriate for tunneling.

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