Thiess, in joint venture with local contractor Khishig Arvin, is delivering the boxcut and decline project from August 2016. The boxcut will provide a safe and secure entrance for the underground tunnels and conveyors expanding over 10km and depths of up to 1,300m.
The twin declines provide up to 395m of vertical lift with a maximum gradient of 18%. The conveyor to surface declines consist of 16.6km of tunnels and 35,000m3 of large excavations to house the required conveyor transfer and drive stations.
Oyu Tolgoi is jointly owned by the Government of Mongolia (34%) and Turquoise Resources (66%, of which Rio Tinto owns 51%). Rio Tinto has managed the Oyu Tolgoi project since 2010.
Maptek I-Site laser scanners are safe, portable and versatile. The I-Site 8200 system is suited to underground drive mapping and above ground survey applications. Thiess will also use I-Site Studio software with conformance reporting.