adit definition

adit means a horizontal or nearly horizontal opening into an underground mine;
adit affiliate means an individual who has passed the ADIT exams and has subscribed to become an ADIT Affiliate.
adit means a passageway or opening driven horizontally into the side of a hill, generally for the purpose of exploring underground or otherwise accessing a mineral deposit.

More Definitions of adit

adit means a horizontal or nearly horizontal underground passage coming to the surface at one end of a mine. “Assay” means to test minerals by chemical or other methods for determining the amount of metals contained therein.
adit means a horizontal or nearly horizontal passage driven from the surface for the working or unwatering of a mine.
adit means a nearly horizontal access into underground workings from a side of a hill or surface;
adit. Means a type of entrance to an underground mining shaft which is horizontal or nearly horizontal.
adit means an artificial pit or hole of an inclination not more than 3 degrees from the horizontal;
adit means a permanent horizontal underground tunnel leading from the surface to an ore body;
adit means a horizontal excavation for a mine entrance, or potential mine entrance, made in connection with a coal or oil sand exploration program;