Overview

Mine Type	Open Pit
Stage	Permitting
Commodities	Coal (thermal)
Mining Method	Truck & Shovel / Loader
Mine Life	...
Snapshot	The Wahana Rimba Lestari (WRL) Project is designed as a source for supplying coal to domestic power plants. Mine is planned to be initially a 3Mtpa operations with 3 yrs ramp-up period. Mine is proposed to be expanded to 5.5 Mtpa operation from Year 8 onwards. Coal is proposed to be sold to the Power Plant on the ROM stockpile uncrushed.

Deposit type

• Sedimentary

Summary:

The local geology of the concession is comprised mainly of the late Miocene to Pliocene age Muara Enim Formation which is conformably overlain by the Kasai Formation to the south.

The Muara Enim Formation is the major coal-bearing formation within the South Sumatra region. The top and bottom of the Muara Enim Formation are defined by the upper and lower occurrence of laterally continuous coal beds. The formation itself is comprised of several stacked parasequences which vary from 0 m to 30 m in thickness, with shallow marine or bay clays at the base and shoreline and delta plain facies (sand, clay, coal) at the top. The Muara Enim Formation has been divided into 4 sub-formations (M-1 to M-4) and contains up to 12 different coal seams, which can reach a maximum total thickness of around 30- 35 metres.

The concession is located in an area of relatively simple geology with undulating coal seams with low dip angles and no major structural features recognized. The coal dips at less than 10 degrees.

WRL Coal Block lies in the Muara Enim formation coals and seams dip shallowly approximately 10 degrees to the north east. The coal quality is low rank with high inherent moisture and low ash and sulphur contents.

The deposit at WRL coal block contains 11 modelled coal seams of which 5 have been split into upper and lower plies. Some seams are less continuous than others and have been modelled to pinch out were not present in a particular drill hole. The Seam P14 seam is one of the most continuous seams contributing towards the coal resource and is present along the eastern part of the tenement. It sub crops in the middle of the tenement running from NW to SE throughout the deposit.

Within the WRL concession, Muara Enim Formation coals are classified as a low energy subbituminous class B coal.

Mining Methods

- subscription is required.

Comminution

Crushers and Mills

Processing

Summary:

Coal will be sold from the stockpile area in an uncrushed form (as mined), hence no crushing facilities planned to be constructed for WRL project. The stockpiles will be the coal selling point where the ownership of the coal transfers from WRL to customer.

Weighbridges are planned to be installed at the entrance to ROM stockpiles to weigh coal trucks coming from the pit and at the exit point of the ROM area. These weighbridge readings will be reconciled and used as the basis for contractor payments calculation and for invoicing the customer.

Production

Operational metrics

Metrics
ROM coal, LOM	....
Raw coal annual capacity	....
Stripping / waste ratio	....
Waste tonnes, LOM	....

Personnel

Job Title	Name	Profile	Ref. Date
.......................	.......................		Dec 31, 2022
.......................	.......................		Dec 31, 2022