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Australia
Mount Thorley Mine (Mount Thorley Warkworth Operation)

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 Location:
13 km SW from Singleton, New South Wales, Australia

  Address:
380 Putty Road Mount Thorley Via Singleton
New South Wales, Australia
2330
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  • Mining
  • Processing
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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Coal (semi-soft coking)
  • Coal (thermal)
  • Coal (metallurgical & thermal)
Mining Method
  • Truck & Shovel / Loader
  • Dragline
Production Start...


Owners

Source: p. 102
CompanyInterestOwnership
POSCO Australia Pty Ltd. 20 % Indirect
Yancoal Australia, Ltd. 80 % Indirect
Mt Thorley Operations (MTO) is a joint venture owned by Yancoal (80%) and Posco (20%).

Contractors

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Deposit Type

  • Sedimentary


Summary:

Mount Thorley Warkworth (MTW) is located within the Sydney Basin of New South Wales (NSW), a world–class export thermal coal mining district. The Sydney Basin is a north-south trending basin, containing generally flat lying Permian Triassic sequences, approximately 250 km long, averages 100 km in width, ranges from 2km to 4km in depth and covers an area of approximately 37,000 km2 onshore and 15,000 km2 offshore. Sedimentation in the Sydney Basin can be divided into many distinct depositional episodes, related to marine transgression and regression an terrestrial sedimentation. In the Sydney Basin the total thickness of the sedimentary package ranges on average from 2 to 3 km over much of the basin, based primarily on drill-hole records and deep seismic profiles. Coal bearing formations in Permian aged sediments are extensive in the Sydney Basin and range in depth from near the surface to over 1 km. The Sydney Basin is divided into five major coalfields; Southern, Central, Newcastle, Hunter and Western, and comprised of black anthracite coal bed of a few centimetres to several meters, interbedded with sandstones, shales, tuffs and claystone. During coal bore drilling in the late 19th Century a number of bores encountered flows of natural gas. The Late Permian coal measures show sources of both oil and gas, with the offshore basin possibility more prone to oil Fine grained sediments deposited during the brief marine incursions that took place during the Late Permian ........


Mining Methods

  • Truck & Shovel / Loader
  • Dragline


Summary:

The proposed mining method within MTW is the same as that currently employed. Large electric face shovels, hydraulic excavators and front-end loaders are utilised to load haul trucks to remove pre-strip and parting material. Draglines are used to expose lowest coal seams. Ancillary equipment in the form of drills, graders, rubber-tyred dozers and water carts will provide the mining equipment with support as required. Coal is extracted by front-end loaders and/or excavators loading haul trucks.

The current mining equipment will continue to be used. In general, changes may occur due to replacement or as technology changes.

Overburden and Interburden Material
Overburden removal at MTW is centred on shovel pre-stripping methods and dragline “stripping”. Multiple bench pre-stripping is used to expose shallower coal seams with a combination of dragline and shovel operations to remove lower interburden. Overburden removal operations generally proceed as follows:

- Tree clearing and timber harvesting is carried out under contract. Topsoil removal is carried out under contract using small earthmoving equipment such as a D6 bulldozer with a loader and trucks.

- Overburden is drilled. Generally holes stop short of the coal seams to reduce blast damage to vthe coal. Hole diameters range from 200mm to 270mm. Drill patterns depend on hole depth and hole diameter but pattern sizes will generally range from 5m x 6m to 10m x 12m.

- ........


Crushing and Grinding


Processing

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Summary:

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Production:

CommodityUnits201620152014
Coal (semi-soft coking) kt 1,4201,3981,952
Coal (thermal) kt  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as clean coal.

Operational Metrics:

Metrics202020192018201720162015
Coal tonnes mined  ......  Subscription required0.71 Mt of ROM coal3.02 Mt of ROM coal4.08 Mt of ROM coal3.96 Mt of ROM coal3.32 Mt of ROM coal
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Reserves at December 31, 2021:

CategoryTonnage CommodityMarketable Coal
Proven 2 Mt Coal (metallurgical & thermal) 1.3 Mt
Probable 16 Mt Coal (metallurgical & thermal) 11 Mt
Proven & Probable 18 Mt Coal (metallurgical & thermal) 12.3 Mt
Measured 203 Mt Coal (metallurgical & thermal)
Indicated 150 Mt Coal (metallurgical & thermal)
Inferred 75 Mt Coal (metallurgical & thermal)
Total Resource 428 Mt Coal (metallurgical & thermal)



Heavy Mobile Equipment:

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 24, 2022
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Annual Review 2018
Other 2018
Annual Report 2017
Annual Review 2017
Annual Report 2016
Annual Review 2016
Annual Report 2015
Annual Review 2015
Annual Report 2014
Annual Review 2014
Other 2014
Annual Review 2013
Other 2013
Annual Report 2012
Other 2011
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