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

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
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: 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 days
Hydraulically tensioned boot
Allows final drive / LTU installation 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. 1:8 Drifts to remain within Seam from NWM 13 – 20c/t
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