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Oyu Tolgoi Underground Project



Oyu Tolgoi consists of a series of deposits containing copper, gold, and silver. The deposits stretch over 12 km, from the Hugo Dummett North Zone in the north through the adjacent Hugo Dummett South Zone, down to the Oyut Deposit, extending to the Heruga Deposit in the south. Over 80 per cent of Oyu Tolgoi’s potential lies underground.



Hugo North Lift 1 (First stage)



Open Pit Oyut Deposit Heruga Deposit



A total of US$2.2 billion USD is projected to be paid to the Government of Mongolia through taxes and other fees during the first stage of underground development. 0.5



(Second Stage)



The total area of the ore body to be covered in the first stage of underground development is 17 times as big as the area of the Chinggis Square.



1300 m



1300 m



Total length of tunnels over the life of Hugo North Lift 1 - 200 km (height 5.5m, width 5m)



undercutting level



Hugo North Lift 1



extraction level ventilation level



Hugo North Lift 1



95,000t ore per day



haulage level



The crusher is as high as a 7-story building.



The first stage of underground development will take place at Hugo North Deposit Lift 1. Construction is expected to take approximately five to seven years.



3500 2500



0.3



2000



0.2



1500



Estimated direct payment to Government of Mongolia*



0.1 Year 2016



Year 2017



Year 2018



Year 2019



Year 2020



Year 2021



Construction workforce



1000 500 Year 2022



- * Figures are inclusive of open pit operations and underground construction. - All numbers are estimations and may be updated.



0



(excluding operations workforce)



Year 2016



Year 2017



Year 2018



Year 2019



Year 2020



Year 2021



Year 2022



All images are for illustrative purposes only and not to scale.



Fractured ore



The total conveyor length (10km) is as long as the road from the Chinggis Square to Tolgoit station.



At the peak of construction, the workforce at the underground is estimated to reach more than 3,000.



Hugo North Lift 2



3000



0.4



0



At peak operations: - 50 drilling machines - 25 loaders - 10 haulage trucks - 290 other pieces of equipment



The deepest shaft is the equivalent of 12 Blue Sky Towers in depth.



• Mining method: Block caving • Operations: The mine will work 365 days a year with two 12hour shifts. • Future underground infrastructure: - 3 maintenance shops - 2 drilling machine shops - 2 fuel stations - 1 explosives storage - 2 crushers - 1 shotcrete station - 10 km of conveyors



Hugo Dummett North Zone



1300 m



Hugo Dummett South Zone



SAFETY COMES FIRST