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. |
