Hugo Dummett North ZoneHugo Dummett

South Zone

1300

m

1300

m

Heruga Deposit

Open PitOyut 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 FIRSTYear

2016Year2017

Year2018

Year2019

Year2020

Year2021

Year2022

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

0500

100015002000250030003500

Construction workforce (excluding operations workforce)

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

Year2016

Year2017

Year2018

Year2019

Year2020

Year2021

Year2022

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.