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.
For Diamer Basha Dam, laboratory testing data and geological mapping of two adits (total length 1183 m) have been used as the input parameters to classify the rock mass.
Given the proximity of the adit entrance to the soil litter interface, some individuals becoming active in the spring could reach the surface and follow the rock surface down into the adit entrance.
Adit regional development manager Annie Oldfield said: "Our function is to increase broadband take-up and get the best value for the public sector in buying broadband.
The pit caught rain and snowmelt, and funneled it down into fractures and the underground workings, from which it drained through an adit. Plugging the adit in 1994 helped reduce loadings of acid and metals from the site, but a number of seeps of acid water developed after the plugging.
With the mine's adit directly next to the A488 roadway and a river directly on the other side of the road, construction of a reception shaft was impractical due to the confined area.
At that time the workings consisted of a 35-meter-long southwest-trending adit with two short adits north and south of the main portal (Fig.
Ecuadorian completed an exploration adit through the Alejandra zone at Beroen last year (MJ, April 21, 2000, p.305), and notes that both the Alejandra and the Dorada zones are open along strike and at depth.
The best result for copper for the rocks samples was 12.2% for a sample of massive chalcocite from the upper adit at the Sunset showing.
Potential extensions to existing mines have also been identified, with infill sampling confirming continuity of an anomaly (the 'Lowri Target') lying parallel to the Llechfraith adit and a major anomaly (the 'Eryn Target') lying above historic Llechfraith workings
Subsequent to reporting the results of the new KSM PEA, Seabridge announced it has received permits from the British Columbia government necessary to develop an exploration adit into the Deep Kerr deposit.
Advent, the flagship brand of Adit Infratel Pvt Ltd and a leading player in the mobile accessories and peripherals market, has introduced Apple certified MFI Lightning cable at Rs.