There have been several related incidents of diesel fuel fires occurring on mobile plant while they were being refuelled.
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A blast hole drill rig mast was being lowered from the vertical to horizontal position. Its top end was about 1 metre from its horizontal resting position when a bearing block capping bolt failed.
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A drill rig assistant suffered a blow to the head and an injured knee when the drill rod he was helping to support suddenly fell to the ground.
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Hydraulic fluid burst through the wear spot on the hose and injected through the double gloves into the fitter’s index finger. Major surgery was required to track and remove the injected hydraulic fluid from the fitter’s finger and hand.
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While pulling drill rods the “D” Shackle used to connect the hoist rope to the hoist plug failed catastrophically.
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The injured man inserted his arm into the cyclone to clear the blockage and while his arm was still in the cyclone, the Driller closed the cover plate.
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As the pedal depressed it opened the foot clamp and released the drillstring which fell into the hole causing the hoisting plug to hit the top of the clamp. The force with which the hoisting plug hit the foot clamp caused the foot clamp pedal to lift very abruptly.
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Just as the injured man was about to loosen the drill rod the chuck and therefore the drill rod rotated unexpectedly pulling the drill rig assistant towards the drill rig, jamming his right hand between the spanner and the substructure of the drill rig.
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