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 ?
These adits are approximately perpendicular to strike and vary from 30 to 70 metres below surface.
0 million from cash and investments on hand for the final quarter in 2006 to finalize permitting, engineering, the preliminary draft EIS, and the reopening of the Libby Creek adit for the Montanore Project.
The Adit 600 platform achieves high service density with a compact, shoebox-size design incorporating six universal slots for multi-port network or customer service cards.
With the successful acquisition of EverCAD and the completion of the ADiT integration, ADMS further solidifies its position as the leader in mixed-signal simulation technologies," said Jue-Hsien Chern, senior vice president and general manager, deep submicron division, Mentor Graphics.
When configured as a media gateway, the Carrier Access Adit 600 Customer Service Terminal provides multi-service access at the edge of converged packet networks.
We believe that our meeting with the agencies was very positive, and we are encouraged that we could begin the process of reopening the Libby adit this year.
The adits developed by UPRR consist of a northern adit 755 feet long and a southern adit 452 feet long.
Between 1961 and 1965, a fifth adit tunnel (Adit #5) was developed on the Upper Skomac vein, from which some 553 tonnes (609 tons) of mineral were extracted, averaging 1.
The Association for Real Estate and Tourism Development, a Brazil-based non-profit organization focused on promoting partnerships between national and international investors, has announced the results of the ADIT Invest 2011 event.
Since its launch in November 2009, regional and international interest in the event u which boasts a unique racing format to allow for quicker athlete recovery time u has continued to swell with ADIT attracting athletes from the four corners of the globe, from the USA, UK and Finland in the West to Hong Kong, Australia and New Zealand in the East.
IT Works' main sponsor( public sector broadband connectivity supplier Adit ( will host a half-day of sessions and case studies under the title of the European Forum, which will look at the future of ICT in the public sector.
Fire assay results from adit PD3060 on mineralised Zone 3 in the