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A vertical passage which provides access or ventilation to an underground excavation or chamber. Use only if function is unknown, otherwise use specific term.

Related Terms

Term Note
ADIT A horizontal tunnel opening from the surface used for haulage, access to a mine, exploration or drainage.
COAL SHAFT A vertical shaft providing access to the lower tunnels in a coal mine.
MINE SHAFT A vertical or inclined excavation giving access to an underground mine.
TUNNEL An artificial underground channel. Use specific type where known.
WELL A shaft sunk into the ground to provide a supply of water. Linked Data resource