how does a mine shaft headgear work
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Shaft Mining or Shaft Sinking is excavating a vertical or near-vertical tunnel from the top down, where there is initially no access to the bottom. Small shafts may be excavated upwards from within an existing mine as long as there is access at the bottom, in which case they are called Raises.
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each company will submit a tender for design and construction of a mind lifting system commonly called mansakadunch shaft headgear
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