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Kestrel Mine Extension

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The Kestrel Mine Extension Project is the largest underground coal project since the construction of the Gordonstone Mine in 1990, providing access to the 400/500 series longwall coal panels in the German Creek Seam, with an expected mine life of 25 years.

Scope of work

Mastermyne’s involvement incorporated three separate parts;

  • Drift development,
  • Pit bottom development,
  • Mains and gate road development for first longwall coal.

CC03 contract work scope included;

  • Excavation of portal entries
  • Installation of steel sets
  • Supply and installation of temporary development drift conveyors
  • Supply and installation of development ventilation fans for both drifts and pit bottom development
  • Construction of a surface training facility including bolting platform and wheeling roads
  • Construction and completion of a 1in 8 transport drift 1877m long with concrete segment paving
  • Construction and completion of a 1 in 6 conveyor drift 1577m long with concrete segment paving
  • Construction and completion of a 2.5km pit bottom drivage, which included the linking of the drifts
  • Intersection of the main ventilation shaft
  • Installation of development belts, pit bottom belt and TG401
  • Installation of pit bottom pumping station
  • Several overpasses/ underpasses

AA02 contract work scope included;

  • Temporary drift conveyor replacement
  • ‘Life-of-mine’ drift conveyor installation
  • Mains trunk belt installation
  • LW401 conveyor installation
  • Pit bottom pumps and mine dewatering
  • Underground electrical infrastructure installation
  • Real time monitoring installation

Key Statistics

Division: Underground Mining
Client: Rio Tinto Coal Australia
Location: Emerald, QLD
Value: CC03 $105 million, AA02 $38 million
Start date: March 2010
Finish date: December 2013
Key outcomes:

  • 430,412 man hours were completed.
  • Tool box talks completed – 1,780
  • 6,000 × 8m mega bolts were used
  • 12,000 rib bolts
  • 12,000 m3 of concrete
  • 35,7000 galvanised high tensile roof bolts were installed
  • 4,555m3 of fibre reinforced shotcrete was applied
  • 2,877 concrete pre-stressed pavers have been used

Safety: TRIFR 6.51 (200,000 m/hrs.)

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