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Keywords:
Tunnel,
Excavate,
Underground,
Lode,
Orebody
To dig Horizontally; to cut a horizontal gallery or tunnel.
An underground excavation within the mine.
excavate horizontally; "drive a tunnel"
An underground passage for exploration, development or working of an orebody. It may be taken along the orebody or parallel to it.
A horizontal underground tunnel.
A tunnel driven along the strike of the lode
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