adit


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adit

(ăd`ĭt), in mining, underground passage excavated nearly horizontally, with one end open to the earth's surface, usually used to service a mine. The adit end is the furthermost end from the surface, i.e., the location where miners work. The adit collar is the area where an adit opens to the surface and must be reinforced against any surface weakness.

Adit

 

a horizontal or inclined excavation that has an outlet to the surface and is designed to facilitate mining operations. Adits can be exploratory or used for working deposits. Transport, ventilation, and water-removal adits are distinguished, depending on their purpose.

adit

[′ad·ət]
(civil engineering)
An access tunnel used for excavation of the main tunnel.
(mining engineering)
A nearly horizontal tunnel for access, drainage, or ventilation of a mine. Also known as side drift.

adit

An entrance or passage.
References in periodicals archive ?
In this cross-section the continuation of all rock layers is clearly visible, the same Flysch composition can be noticed and the adit section is distinctly marked with the resistivity value larger than 260 [OMEGA]m.
These are active predators that had probably strayed into the adit via the entrance from the woodland floor above.
Pale gray-green spherical masses (to 6 mm) have also been found in small vugs lined with milky quartz crystals associated with an altered galena body in the lower adit.
This was just one of the contracts brokered by Adit last year.
Particularly fine specimens associated with spangolite were recovered during the May-June 1996 dig just south of the adit portal.
1 million in fixed assets in 2007, which principally consisted of equipment for rehabilitating and extending the adit.
2 adit intersects similar geology on the west side of the major fault, and a number of stopes are being developed along northeast trending structures.
LCV had a "12-year Mining Lease" with Noranda Minerals Corporation, which was terminated and the adit (tunnel) abandoned by Noranda on July 27, 2002, when Noranda "pulled up stakes" in Montana.
The Companys rehabilitation of the underground workings is making good progress at Adit #1.
At the forefront of technological change and innovation in telecommunications across the region is Adit North East.
7 million increase in net loss was attributed to increased expenditures for the first quarter 2007 compared to first quarter 2006 resulting from increased activity for the Montanore Project including permitting, technical studies, and preparation for the Libby adit rehabilitation and delineation drilling program, and corporate legal, accounting, and administrative expenses relating to the public offering completed on April 20, 2007.
The Canadian developer of one of the worlds largest gold/copper mines Seabridge Gold has won approval from the British Columbia provincial government to move forward with an exploration adit into the Deep Kerr gold/copper deposit at the KSM project, 65 km north-west of Stewart.