Australia

Grasstree Mine

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Categories

Overview

Mine TypeUnderground
StatusClosing / Closed
Commodities
  • Coal (metallurgical)
  • Coal (hard coking)
Mining Method
  • Longwall
Production Start... Lock
ShapshotIn February 2022, Anglo American announced, that Grasstree mine reached its end of life.
Related AssetCapcoal Operation

Owners

SourceSource
CompanyInterestOwnership
Mitsui & Co., Ltd. 30 % Indirect
Anglo American plc. 70 % Indirect
Anglo Coal (Capcoal Management) Pty Limited (operator) 100 % Direct
Capcoal complex is a joint venture between Mitsui Coal Holdings (30 per cent equity share) and Anglo American who is the operator of the mine.

Deposit type

  • Sedimentary

Summary:

The Grasstree is located on the north-western flank of the Bowen Basin, a sedimentary basin comprising Permian to Triassic age geology. A veneer of more recent Tertiary and Quaternary age sediments typically overlie the Bowen Basin strata.

The relevant geology in the vicinity of the Grasstree longwall mining area includes:
- Quaternary alluvium associated with German Creek and Little Parrot Creek;
- A veneer of Tertiary sediments of the Duaringa Formation;
- Permian coal measures including the target German Creek Seam (GC seam).

The Permian coal measures include the Rangal Coal Measures, the Burngrove Formation, the Fort Cooper Coal Measures (also known as the Fairhill Formation), the Macmillan Formation and the German Creek Formation. The coal measures comprise a sedimentary sequence with interbedded coal seams, including the target GC seam. The upper profile of the coal measures has been extensively and deeply weathered. The weathered coal measures outcrop at the surface across the southern portion of the longwall mining area and much of the surrounding area, forming undulating sandy plains. In the northern portion of the longwall mining area, the coal measures sub-crop under the Tertiary sediments and dip to the east. As the coal measures dip to the east, the depth of the GC seam increases from approximately 330 m in the south-western part of the Grasstree longwall mining area to a maximum depth of approximately 540 m at the north-eastern extent of the longwall mining of area.

Reserves

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Mining Methods

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Comminution

Crushers and Mills

Milling equipment has not been reported.

Processing

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Production

CommodityUnits2022202120202019201820172016
Coal (hard coking) t  ....  Subscribe  ....  Subscribe  ....  Subscribe5,282,4245,909,1685,686,6547,900,809
All production numbers are expressed as clean coal.

Operational metrics

Metrics20222021202020192018201720162015
Coal tonnes mined  ....  Subscribe  ....  Subscribe  ....  Subscribe7,127,860 t of ROM coal7,609,721 t of ROM coal7,404,229 t of ROM coal10,241,899 t of ROM coal10 Mt of ROM coal

Production Costs

Commodity production costs have not been reported.

Heavy Mobile Equipment

Fleet data has not been reported.

Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 5, 2024

EmployeesContractorsYear
...... Subscription required ...... Subscription required 2018

Aerial view:

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