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• Longwall mining
  ...e about 900 feet wide (coal face width) and more than 8,000 feet long (the minable extent of the panel, measured indirection of mining). Longwall mining is do
  931 bytes (143 words) - 15:04, 24 February 2024
• Recoverability
  ...rces, the condition of being physically, technologically, and economically minable. Recovery rates and recovery factors may be determined or estimated for coa
  408 bytes (50 words) - 21:48, 8 April 2024