#mineshaft  excavation consisting of a vertical or sloping passageway for finding or mining ore or for ventilating a mine
  supertype:  #hole_in_the_ground__excavation  a hole in the ground made by excavating
  part of:  #mine  excavation in the earth from which ores and minerals are extracted
     part of:  #colliery__pit  a workplace consisting of a coal mine plus all the buildings and equipment connected with it

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