Sentence Examples

  • Workable coal beds are distributed through 3000 ft.
  • The deposits consist of workable veins, 50 to 220 ft.
  • They consist chiefly of sandstone and conglomerate, but include workable seams of coal.
  • In metal mining, when the workable portions of the deposit are small and separated by unworkable areas, the levels serve also the purpose of exploration, and in such cases must not be so far apart as to risk missing valuable mineral.
  • As the minimum workable thickness, and after making all necessary deductions, estimated the available quantity of coal in the proved coalfields of the United Kingdom as 100,914,668,167 tons.

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