1. DRE20 Recovery The Problem The Objectives
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.
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2. DRE20 Recovery The Problem Con’t
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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.
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4. DRE20 Recovery The Solution: The Recovery Method:
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.
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5. DRE20 Recovery Overall Recovery Plan
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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.
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7. DRE20 Recovery Dragline Bucket and Winch Location
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8. DRE20 Recovery Dragline Bucket Installation and Winch Location
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9. DRE20 Recovery Ready to Winch
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10. DRE20 Recovery Video – Initial Cut with Excavator
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11. DRE20 Recovery Video – RC Dozer in action
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12. DRE20 Recovery Video – RC Dozer in action
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13. DRE20 Recovery Video – RC Dozer in action
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14. DRE20 Recovery Video – RC Dozer in action
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15. DRE20 Recovery Video – RC UG Miner in Action
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16. DRE20 Recovery Almost level
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17. DRE20 Recovery
Level!!!!
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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
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19. DRE20 Recovery
Thanks
To everyone involved, as the recovery would not have gone as smoothly without your input and help.
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