Weekly Incident Summary
Week ending Friday 12July 2019
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A worker in an underground coal mine was installing 1.8 metre roof bolts (as infill secondary support) using a hand-held bolter on the narrow walkside of a conveyor belt.

In the process of relocating the bolter to the next bolt location, it hit the rib side, causing a block of material to dislodge, which hit the worker across the shoulders, back and right leg. The block was about 1.8 metres long and 600 millimetres wide, starting from near roof level (about 1.2 metres above the worker). 

The worker was knocked to the ground and winded. After co-workers checked him for injuries, he was transported to the surface for treatment, where he was cleared of any significant injury. .

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Close Call – Exposure to potential electrical shock 

A street light pole (direct buried type) was found to be rusted at ground level, was on a lean and at risk of falling over. To prevent the pole from falling over it was decided by the Supervisor and Electrician to drive four steel star pickets into the ground and tie the pole to the steel star pickets to provide temporary support. In doing so the star pickets narrowly missed the underground energised electrical cable.

The Supervisor and Electrician did not properly assess the risk. They incorrectly assumed the cable location, and the conduit type prior to driving the metal stakes into the ground. 

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Faulty pressure gauge

A subcontractor was performing splicing of a conveyor belt (joining the belt with pressure and heat) on a mobile crushing plant when a clamping bolt on the vulcaniser failed and part of the vulcaniser catapulted around 5 metres into the air. The part, weighing approximately 50kgs, landed on the back end of the contractor’s van and smashed the rear window.

During the normal vulcanising (splicing) process the belt is regularly checked to ensure a good “cook” is occurring. This involves the contractor getting up next to the vulcaniser. This check had been conducted two minutes before the incident exposing the subcontractor to significant risk of injury. 

An investigation found that the vulcaniser had a faulty pressure gauge, resulting in the vulcaniser  being pressurized to 150 PSI, almost twice the normal pressure of 90 PSI.

 

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Dropped Object struck Steel Fixer 

Two Steel Fixers were standing a 6m long vertical bar on the wall in the west box. The Steel Fixers stated the bar contacted a 200mm long Scaffold Tube extension piece which has caused it to dislodge from the scaffold structure above and drop approximately 6-8m striking one of the steel fixers on the right shoulder. Steel fixer received first aid on site.

 

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