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Dendrobium Coal

Dendrobium Coal. Development Taskforce Presentation. Dendrobium and Illawarra Coal. Commenced construction 2001 for continuity of number 3 seam supply for Illawarra blend Commenced longwall production April 2005 Transport via rail network to Dendrobium Washery.

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Dendrobium Coal

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  1. Dendrobium Coal Development Taskforce Presentation

  2. Dendrobium and Illawarra Coal • Commenced construction 2001 for continuity of number 3 seam supply for Illawarra blend • Commenced longwall production April 2005 • Transport via rail network to Dendrobium Washery

  3. BlueScope Steel & Coal Terminal No.1 Vent Shaft Dendrobium Mine Portal Area 1 Longwall Blocks

  4. Regional location Cordeaux Dam Mine site Stockpile and coal handling facilities Mount Kembla Village

  5. Mine plan overview • Operational constraints • Mining within a sensitive catchment • Multiple external approvals • Geology and structural intrusions • Proximity to other existing mines • Curfews for transport • Community proximity • Longwall constrained by development

  6. Development Equipment Overview • Gate road: • 2 x Voest Alpine continuous miners (superpanel) • 2 x 15SC 32 Waratah Shuttle cars • 1 x Stamler feeder • 1 x 18m3 and 1 x 23m3 Auxiliary Ventilation Fans • Conveyor 1500mm fastgate • Mains Headings: • 1 x Joy 12 CM 30 continuous miner • 1 x 10 SC 32 shuttle car • 1 x Stamler feeder • Conveyor 1800mm bolted structure • 1 x 18m3 auxiliary ventilation fan

  7. Constraint- Mining under and adjacent to old mine workings • Risk management and gaining approval for development and extraction • Pillar by pillar approval requiring up holes for drainage • Water management under Mount Kembla Colliery – infrastructure to pump up to 150l/s • Training and authorisation of personnel to work in control zones

  8. Constraints – Exploratory and statutory drilling Stubs driven off gate roads

  9. Constraints – Geology (MG3 ABM20 superpanel) • Geology – Low strength roof conditions with a large number of low angle faults and dykes. Support type is the primary driver of development performance Cycle time range: 7 -19 days Cutting rate:0.5m/hr – 3.5m/hr

  10. Constraint - Geology Roof falling to 5.5m on first workings and roadway for future tailgate Normal mining horizon 3.2m Red Support density Typical Jointing on Development

  11. Improvements – Changing mining horizon • Historical soft floor conditions • Reduced sprains/strains – muddy conditions • Reduced production delays - bogging of equipment, cleaning of roads and pumping • Reduced equipment damage Ramped up on coal 15th Dec 05 Floor conditions changed 9th Apr 05

  12. Improvement – Gate belt installations • Working at heights and time constraints • Transfer point, Jiffy drive & structure - installed first pass at 3.1m high • Panel sequenced around jiffy belt installation - 4-5 days • Hydraulically tensioned boot • Allows final drive / LTU installation - 2-3 months Working at heights risk reduced

  13. Improvement – Gate belt installations Jiffy drive configuration : flameproof 110kw with delay fluid coupling mounted from head pulley off a torque arm Hydraulically tensioned boot end for use with the jiffy drive gate belt installation.

  14. Improvement – Fit for purpose equipment Building on the work from Centennial Coal - machines modified to better control variable strata conditions. Stage 2: Tilt on apron Stage 1: removal of CLA and fitment of EW shovels

  15. Improvement – Supervisory leadership • Managing performance and developing people - frontline supervisors • Supervisors relatively young with little experience • Conducted a site survey on Leadership. • Linked leadership to front line competencies • Real workplace ‘projects’ as learning vehicles and supported by workplace coaching • Tailored Certificate IV ‘Business’ • Review and evaluation on-going

  16. Upcoming challenges: Mining at grades Grade of 1:5 seam profile (9m seam section)

  17. Upcoming challenges: mining at grades 1:8 Drifts to remain within Seam from NWM 13 – 20c/t

  18. Summary • Dendrobium is a simple mine constrained primarily by location and geology, though forms an essential part of the Illawarra Coal business • Continue to learn about more accurate forecasting and management of local number 3 seam conditions • Rationalising development for simplicity, and consistency • Continue to seek changes to equipment- fit for purpose • Considerable challenges ahead - mining at grades

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