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DRE20 Recovery

DRE20 Recovery. The Problem DRE20 was positioned at a combined angle of 45.5 degrees from the horizontal. The Objectives Recover DRE20: Safely. Minimise collateral damage to the machine. To allow return to work as soon as possible. DRE20 Recovery. The Problem Con’t. DRE20 Recovery.

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DRE20 Recovery

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  1. DRE20 Recovery • The Problem • DRE20 was positioned at a combined angle of 45.5 degrees from the horizontal. • The Objectives • Recover DRE20: • Safely. • Minimise collateral damage to the machine. • To allow return to work as soon as possible. H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  2. DRE20 Recovery • The Problem Con’t H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  3. DRE20 Recovery • The Problem Con’t • Material in the area does not have a high bearing capacity. • Machine could not safely be recovered using traditional methods of material removal from under the tub due to the type of material and the angle of the machine. • In previous recoveries, machines had slipped along the centreline of the machine (ie Nose down, or ballast box down). • Initial meetings determined that traditional recovery methods were not able to be applied in this situation. • Initial Centre of Gravity checks determined that the machine required a restraint to be used to control movement. H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  4. DRE20 Recovery • The Solution: • The recovery of DRE20 required the collaboration of experts in their field of Engineering. • The Recovery Method: • After the slip, the machine was stabilised and planning had begun on the method of recovery to meet the objectives. • Excavation to a level to allow DRE20 to sit level. • Attach winch frame and position dragline buckets as anchor points • Complete excavation under tub • Winch machine back to a level position to allow it to walk out under its own propel system • Repair machine as needed. H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  5. DRE20 Recovery • Overall Recovery Plan H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  6. DRE20 Recovery • The Righting Frame • Weighed 30 Tonnes and was made of 1200mm Welded Beams. • When load is applied, it moves the CoG toward the rear of the machine 1m for every 100t applied. H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  7. DRE20 Recovery • Dragline Bucket and Winch Location H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  8. DRE20 Recovery • Dragline Bucket Installation and Winch Location H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  9. DRE20 Recovery • Ready to Winch H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  10. DRE20 Recovery • Video – Initial Cut with Excavator H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  11. DRE20 Recovery • Video – RC Dozer in action H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  12. DRE20 Recovery • Video – RC Dozer in action H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  13. DRE20 Recovery Video – RC Dozer in action H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  14. DRE20 Recovery • Video – RC Dozer in action H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  15. DRE20 Recovery • Video – RC UG Miner in Action H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  16. DRE20 Recovery • Almost level H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  17. DRE20 Recovery • Level!!!! H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  18. DRE20 Recovery • Repairs post Levelling • LHS Boom Foot Stiffening between Clusters 1 and 2. • Lube Room Panel Beating • Crack repairs • Motor Armature cables replaced • Oil re-filled H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

  19. DRE20 Recovery • Thanks • To everyone involved, as the recovery would not have gone as smoothly without your input and help. H:\01 Administration\Presentations\State of Nations\2008\State of Nation – July 2008

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