#mine excavation in the earth from which ores and minerals are extracted
supertype: hole_in_the_ground__excavation a hole in the ground made by excavating
subtype: coal_mine copper_mine goldmine salt_mine silver_mine strip_mine sulphur_mine
part of: colliery
part: adit a nearly horizontal passage from the surface into a mine
part: mineshaft excavation consisting of a vertical or sloping passageway for finding or mining ore or for ventilating a mine
part: shaft.passage a vertical passage into a mine
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