Hugo Dummett North Zone Hugo Dummett South Zone 1300 m 1300 m Heruga Deposit Open Pit Oyut Deposit Hugo North Lift 1 • Mining method: Block caving • Operations: The mine will work 365 days a year with two 12- hour 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 North Lift 1 (First stage) Hugo North Lift 2 (Second Stage) The crusher is as high as a 7-story building. The deepest shaft is the equivalent of 12 Blue Sky Towers in depth. The total conveyor length (10km) is as long as the road from the Chinggis Square to Tolgoit station. Hugo North Lift 1 1300 m 95,000t ore per day Fractured ore extraction level ventilation level haulage level undercutting level 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. Oyu Tolgoi Underground Project At peak operations: - 50 drilling machines - 25 loaders - 10 haulage trucks - 290 other pieces of equipment Total length of tunnels over the life of Hugo North Lift 1 - 200 km (height 5.5m, width 5m) 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. 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. SAFETY COMES FIRST Year 2016 Year 2017 Year 2018 Year 2019 Year 2020 Year 2021 Year 2022 At the peak of construction, the workforce at the underground is estimated to reach more than 3,000. 0 500 1000 1500 2000 2500 3000 3500 Construction workforce (excluding operations workforce) - * Figures are inclusive of open pit operations and underground construction. - All numbers are estimations and may be updated. Year 2016 Year 2017 Year 2018 Year 2019 Year 2020 Year 2021 Year 2022 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 0.1 0.2 0.3 0.4 0.5 Estimated direct payment to Government of Mongolia* All images are for illustrative purposes only and not to scale.