28 Rock drill rod breaking accident

(1) Rock drill rodspecifications such as material and thickness do not meet the requirements of technical specifications. (2) There are serious scratches on the surface of the drill rod body. (3) In the process of forging and heat treatment of drill rod, due to poor temperature control or unreasonable process.
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One of the world''s biggest drilling companies has been fined $385,000 after a worker''s head was crushed while reassembling a drill rig at a

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As the shorter rod was installed, the operator activated the gripper jaws on the chuck. This released the gripper jaws at the top of the mast that were holding the drill rods in the roof,

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During a reverse circulation exploration drill program a driller''s offsider received serious spinal injuries when a 270kg drill rod, some 6 metres in length fell on him.

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Use a welded rigid rod to directly drill down and hook the crossbeam of the buried drill bucket to pull out the drill tool. (5) If the depth after blasting cannot meet the requirements or the drill tool

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When the drill rod reached approx. 5.5m high, it suddenly released from the screw plug attachment falling onto the driller''s offsider.

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About 28 Rock drill rod breaking accident

About 28 Rock drill rod breaking accident

(1) Rock drill rodspecifications such as material and thickness do not meet the requirements of technical specifications. (2) There are serious scratches on the surface of the drill rod body. (3) In the process of forging and heat treatment of drill rod, due to poor temperature control or unreasonable process.

(1) The drill rod is used for a long time, resulting in more surface damage. (2) When reaming or drilling pilot holes for a long distance, if the speed is too fast, the drill.

In the process of rock drilling, the drill rod is subjected to repeated impact and torsion about 2000 times per minute, and there are alternating compressive stress.

(1). Drill rods conforming to technical specifications shall be selected. (2). Avoid using drill rods with severe scratches. (3). Replace the new drill rod in time. (4).

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