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Australia
Middlemount Mine

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 Location:
7 km W from Middlemount, Queensland, Australia

  Address:
Dysart Road Middlemount
PO Box 24
Middlemount
Queensland, Australia
4746
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Coal (metallurgical & thermal)
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life18 years (as of Jan 1, 2022)
The Middlemount mine predominantly produces semi-hard coking coal and low-volatile pulverized coal injection (LV PCI) coal.

The Southern Extension Project involves extension of operations at the Middlemount Coal Mine to the south and extension of waste rock emplacement areas.

The Project would result in an extension of the approved mine life to 2044.


Owners

Source: p. 127,128
CompanyInterestOwnership
Yancoal Australia, Ltd. 49.9997 % Indirect
Peabody Energy, Inc. 50.0003 % Indirect
Middlemount Coal Pty Ltd. (operator) 100 % Direct
Middlemount Coal Pty Ltd (Middlemount) is an incorporated joint venture between Peabody Energy Australia Pty Ltd (50.0003 % interest through Peabody Custom Mining Pty Ltd) and Yancoal Australia Ltd (49.9997% interest through Gloucester (SPV) Pty Ltd).

Contractors

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Deposit Type

  • Sedimentary


Summary:

The Middlemount resource contains the coal seams of the Rangal Coal Measures and Burngrove Formation of the Blackwater Group. The target seams within the resource consist of the Roper, Middlemount, Tralee and Pisces Upper seams (in descending order) which belong to the Rangal Coal Measures, while the Pisces Lower and Girrah seams belong to the Burngrove Formation and are not considered to have economic potential based on current studies.

Overlying the Rangal Coal Measures are alluvial sediments, inferred to be Tertiary in age, with a thickness of up to 30m. The depth of weathering averages 45m, ranging from 20m in the southeast to over 60m in the central and northern areas of ML70379.

The Middlemount and Pisces seams have been subjected to the majority of the exploration mining works. The Middlemount seam averages 4.0m thick in the area west of the Jellinbah Fault, ranging from less than 2 to over 7 m. The Middlemount Upper working section is a high ash section that is present over most of the Middlemount area – the exception is in the north, where it is less than 0.3m thick. The top section of the Middlemount Lower Section is predominantly dull with some bright banded coal with an average raw coal CSN average of 1 to 1.5. The base section of the Middlemount seam has more bright coal than the top section and the average raw coal CSN is 4 to 5.

The Tralee seam underlies the Middlemount seam. At Middlemount, it ranges in thickness from 0.5 to ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Middlemount uses conventional truck and excavator methods. Coal mining activities is carried out on a 24 hour a day, 7 days a week basis.

Mine Design
The following outlines the mine design aspects of Middlemount operations.
- The geotechnical design criteria that are applied at Middlemount can be summarised as follows:
- A 35° degree slope for the low wall in weathered Permian and Tertiary/Cenozoic sands;
- Individual 50° degree batter slopes for highwalls, sidewalls and endwalls in weathered Permian and tertiary/Cenozoic sands. 10m berms are included every 12m vertically to give an overall slope angle of approximately 35°;
- 25m berm for the highwalls and on top of the fresh Permian. On some endwalls a 50m haul bench is included;
- Individual 70° slope for the highwalls, sidewalls and endwalls in fresh Permian;
- Above the cast blasting zone 25m berms are included approximately 50m vertically to give an overall angle of 55°; and
- A 25m berm is included on top of the cast blasting horizon.

Middlemount operations are contained within two Mining Leases (ML’s) and one Mineral Development Licence (MDL). The area covered by these licenses and permits is about 1,600 ha with the area having approximate dimensions of 5 km north south and 2 km east west.

Pit Limits
The open cut pit limits at Middlemount are based on the following criteria:
- An off set of 50m on the Middlemount seam from the Jellinbah ........


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits2022202120202019201820172016
Coal (metallurgical & thermal) Mt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required3.83.94.1
All production numbers are expressed as clean coal.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Coal tonnes mined  ......  Subscription required  ......  Subscription required4 Mt3.4 Mt4.8 Mt5.3 Mt
Coal washing plant annual capacity  ......  Subscription required  ......  Subscription required5.4 Mt
Stripping / waste ratio  ......  Subscription required  ......  Subscription required10.6 bcm/t
Subscription required - Subscription is required.

Reserves at December 31, 2022:

CategoryTonnage CommodityMarketable Coal
Proven 69 Mt Coal (metallurgical & thermal) 49 Mt
Probable 19 Mt Coal (metallurgical & thermal) 18 Mt
Proven & Probable 88 Mt Coal (metallurgical & thermal) 67 Mt
Measured 79 Mt Coal (metallurgical & thermal)
Indicated 55 Mt Coal (metallurgical & thermal)
Inferred 21 Mt Coal (metallurgical & thermal)
Total Resource 155 Mt Coal (metallurgical & thermal)

Financials:

Units20222021202020192018
Revenue M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required 755  
After-tax Income M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 91  
Book Value M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 274  
Subscription required - Subscription is required


Water Supply
Source: Subscription required

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Heavy Mobile Equipment:
HME TypeModelSizeQuantityLeased or
Contractor
Ref. Date
Dozer ....................... Subscription required ....................... Subscription required Leased Apr 3, 2023
Dozer ....................... Subscription required ....................... Subscription required Leased Apr 3, 2023
Excavator ....................... Subscription required ....................... Subscription required Leased Apr 3, 2023
Grader ....................... Subscription required ....................... Subscription required Leased Nov 21, 2018
Truck (dump) ....................... Subscription required 220 t ....................... Subscription required Leased Apr 3, 2023
Truck (dump) ....................... Subscription required 190 t ....................... Subscription required Leased Apr 3, 2023
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 8, 2023
....................... Subscription required ....................... Subscription required Subscription required May 8, 2023
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required May 8, 2023
....................... Subscription required ....................... Subscription required Subscription required May 8, 2023
....................... Subscription required ....................... Subscription required Subscription required May 8, 2023
....................... Subscription required ....................... Subscription required Subscription required May 8, 2023
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2022
Subscription required 2021
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Corporate Presentation 2022
Financial Review 2022
Form 10-K 2022
Quarterly Report 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Form 10-K 2018
Other 2018
Other 2018
Other 2018
Annual Report 2017
Annual Report 2017
Financial Review 2017
Project Description 2017
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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