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Safety with Dozer
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Dozer Safety On Stockpiles
Purpose
– To increase the level of understanding around the risks associated with operating dozers on stockpiles with discharge feeders, and to share learning's and controls available to help minimise these risks.
Outcome
– Increased awareness around the operating risks
– Share learning's from two recent incidents– Share some of the available controls to
minimise these risks
Stockpile and Feeder Design- Stockpile Cross Section
Conveyor
Discharge Feeders
Live Zone Dead Zone
Stockpile and Feeder Design- Stockpile Cross Section
Conveyor
Discharge Feeders
Live Zone Dead Zone
Live Area of Feeder Cones
Principal Operating Risks and Hazards
• Falling into feeder
Principal Operating Risks and Hazards (cont.)
• Domed out or rat holed feeder
Principal Operating Risks and Hazards (cont.)
• Slumping
Principal Operating Risks and Hazards (cont.)
• Engulfment
Safety Statistics
Stockpile Incidents XXX
0102030405060708090
2000 2001 2002 2003 2004 2005
Year
Cum
ulat
ive
Inci
dent
s Feeder Incidents
Slumping Incidents
Total Incidents
Dozer Incident – 19th March 2006• 15:45 : Operator travels between feeder 7 and 8, Stops dozer
due to limited visibility. After 3 to 5 minutes of being stopped, dozer falls into feeder cone.
• 15:50 : Emergency signal received, Dispatch unable to verify with TRD 326, Supervisor asked to investigate
Dozer Incident – 19th March 2006 (cont.)
• 16:00 : Supervisor unable to locate Dozer, decision is made to stop the systems ( trippers and feeders).
• 16:10 : Mine rescue group informed.• 16:20 : Excavation commences on Feeder 1• 18:00 : Upper Portion of Ripper exposed in Feeder 8
Dozer Incident – 19th March 2006 (cont.)
• 20:42 : The rear window of the bulldozer is cleaned by rescue teams, who discover by way of signals that the operator is alive.
• 20:45 : Operator leaves the cabin of bulldozer 326 walking unaided.
Dozer Incident – 19th March 2006 (cont.)
•Cabin of dozer where operator was trapped, it is believed that the air conditioning fan continued to circulate air from engine bay through cabin throughout event
•Operator remained calm throughout event
•No additional oxygen supplies used,
•Recovered dozer
Learnings From These Events
Comunication/Emergencysystem needs to work in all conditions
Operators need to be able to understand the risk in order to control it
Challenge our operations to rigorously apply the hierarchy of controls
Hierarchy of Controls• Eliminate– Dozerless stockpiles • Separate – Remote Control Dozers
• Re-design – Stacker/Reclaimer systems, Load out bins
• Substitution – Low profile blades to improve visibility, Establish stockpile trigger points. Eg. >400Kt – Isolate feeders/trippers before pushing in
• Administration – training to increase awareness, GPS to locate feeders, Feeder indicating lights
• PPE – Oxygen in cabins, self rescuers, Strengthened glass, ROPS,
