Kestrel Mine Extension

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Project: Kestrel Mine Expansion
Location: Emerald, QLD
Client: Rio Tinto Coal Australia
Value: $248 million (CC03 and AA02 contracts)
Start Date: Mar 2010
Finish Date: Dec 2013
Project Description: The Kestrel Mine Extension Project was at the time 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 tears. 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 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 1 in 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 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

Manhours 430,412
Toolbox Talks 1,780
8M Mega Bolts installed 6,000
Rib Bolts installed 12,000
Galvanised high tensile roof bolts installed 35,700
m3 of fibre reinforced shotcrete applied 4,555
m3 of concrete 12,000
Concrete prestressed pavers installed 2,877
Total development M/year 7,225
Average development M/week 170
Average development MPOH 3.2
Average weekly operating hours for development 63
Roadway cutting width & height 3.2m (H) x 5.2m (W)
What we do

A record week of development on the Narrabri project demonstrates Mastermyne can achieve high productivity injury free. The week that was: Days Injury Free 384 days Record Meters 504.8m   Whilst we commend the Narrabri Project team for this achievement we acknowledge that consistency is king; ultimately week on week strong performance is always our […]