Collision between semi-autonomous dozer and manned excavator

A collision occurred between a Caterpillar D11T dozer operating semi-autonomously and a manned Hitachi EX1200 hydraulic excavator at 13:40 on Monday 27 May 2019. The excavator operator was scaling a section of a highwall in the operating area of the semi-autonomous dozer fleet. The excavator travelled into an active slot, in the path of a dozer working in semi-autonomous mode, while the dozer was reversing to commence the next programmed push. When the dozer contacted the rear of the excavator, it pushed the excavator approximately 1.5 metres sideways and then began to spin its tracks. After five seconds the dozer’s semi-autonomous system identified that it had experienced track slip and stopped tramming as programmed.

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Failure of Suspension Airbag

The injured party (IP) was carrying out maintenance work on the underside of a trailer unit. Near the end of the maintenance, the IP was stood in the pit working on the underside of the trailer near the axle, when the suspension airbag to the right exploded.

 

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WEEKLY INCIDENT SUMMARY
Week ending Friday 28 June 2019

When carrying out repairs to a broken conveyor chain on a continuous miner, a flight bar became jammed in the foot sprocket. This occurred while pulling the chain on with a winch rope. This resulted in the flight bar snapping and being ejected. Part of the flight bar hit a worker on the left shoulder. The worker was positioned to observe the chain run around the foot sprocket, while standing on the bolting platform.

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Fatality Alert
MSHA MINE FATALITY – On June 10, 2019, a 22-year-old contractor with 3 years of experience, was fatally injured when he was pinned between a front-end loader and a concrete block. The victim was working in a conduit trench, preparing to install a junction box. The plant manager was using a front-end loader above to back fill the trench. The front-end loader over travelled the edge and toppled into the trench. 

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Vehicle collision near misses

We continue to have too many vehicle collision
near misses. The following have occurred in recent
months:

  • Near miss between a truck and a mechanic testing a forklift. The truck moved to line up better under the hopper and the mechanic has driven the forklift behind the truck thinking he was parked.
  • Operator went to fill up a vehicle he did not normally use at fuel station. Pulled up but the fuel tank was on the other side of the vehicle. They went to reverse the ute around to the other side and hit the corner pillar.
  • 40t ATD. Operator reversed past two dump trucks, without confirming on the R/T it was clear. They clipped the bonnet of the stationary ATD causing slight damage to bonnet.
  • A truck was leaving a clean fill area. On approaching a corner, a concrete truck turned in off the yard and cut off the truck.
  • A farmer entered the middle yard the wrong way and against the flow of traffic. The loader driver had to avoid the truck.
 
 

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Fatality Alert
MSHA MINE FATALITY – On June 24, 2019, a 34-year-old contractor with 10 years of experience, received fatal injuries when he fell beneath the wheels of a tractor-trailer. Miners were using a bulldozer to pull the tractortrailer, which had become stuck in the sand. As the tractor-trailer began to be pulled, the victim was seen walking toward the side of the truck. The victim died at the scene from crushing injuries after being run over by the truck wheels.

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