Adit
A mine entrance is technically an 'adit'
Adit
Adit
The horizontal entrance is called a portal. If there are two portals, then you call the excavation a tunnel. If there is only one, it is call a drift or adit.
The entrance to underground mines is called a portal or adit. It is the point of access for miners and equipment to enter and exit the mine.
A horizontal entrance to a mine is known as an adit.
An adit. In North America, the horizontal or sloped entrance to a mine is called a "Portal". Portal more specifically refers to the portion of the shaft visible from the outside of the mine. In some areas, the Portal portion of a horizontal shaft is called the "Drift Mouth" or "Drift Portal" as this shaft leads into a "Drift Mine". With a vertical shaft, that portion would be called a "Collar".
adit
A vertical mine entrance is commonly referred to as a "shaft." Shafts are used to access underground mines, allowing for the transportation of miners, equipment, and extracted materials. They can also serve as ventilation routes to facilitate airflow in the mining operation.
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at the entrance to Merry Vale there is a rich tin vein mine and get garnet there
The opening of the mine was at the entrance of the complex. "It's mine!" Yelled the toddler. Mine came first followed by Jessica's.