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47 records found.
Fire on Hydraulic Jack Ejection of Burning Hydraulic Oil

As an Apprentice was welding brackets onto what appeared to be the front structural member of a Caterpillar Belly Guard Jack, he holed the structural member and was sprayed with burning hydraulic oil. The fire was extinguished and the protective... Read more


Roof Support Jacks

It is a common task for miners to set jacks or dukes to support the roof. But there can be a hazard from a piece of rock falling when a miner releases the pressure and removes the jack ... Read more


Hand Tools - Jacks

In a recent three-year period, 89 hand tool injuries in mines were caused by improper use of jacks ... Read more


Fire on Hydraulic Jack Ejection of Burning Hydraulic Oil

What As an Apprentice was welding brackets onto what appeared to be the front structural member of a Caterpillar Belly Guard Jack, he holed the structural member and was sprayed with burning hydraulic oil. The fire was extinguished and the protective... Read more


Investigation of the Jacking Force Capability of Tunnel Liners

Steel liner plates, which are bolted together to form a shell, are commonly used to provide temporary protective linings in the tunneling industry to ensure the stability of the tunnel and safety of the workers until more permanent ground reinforcement... Read more


Defective Restrained Back-to-Back Couplers

What A Department of Primary Industries inspection of two Crouse Hinds – Macey 425A, 660/1100V back to back couplers at an approved cable repair workshop has identified two potentially dangerous situations. A 425 ampere (A) back to back coupler had a... Read more


METAL/NON-METAL MINE FATALITY - Fatal Falling Material Accident

What A tyre contractor was fatally injured at a dimension stone operation. The victim was replacing tires on the front-end loader. He was pinned under the loader when it fell off the supporting jacks. Why The accident occurred because policies and procedures failed... Read more


Fatal Falling Material Accident

What A tyre contractor was fatally injured at a dimension stone operation. The victim was replacing tires on the front-end loader. He was pinned under the loader when it fell off the supporting jacks. Why The accident occurred because policies and procedures failed... Read more


MSB No. 091 Use of wooden blocks to support earthmoving equipment

The inappropriate use of wooden blocks to chock and support earthmoving equipment off the ground creates a serious hazard for people working under or near heavy equipment. This situation has resulted in serious crush injuries and deaths in Australia when... Read more


Mines Safety Significant Incident Report No. 22

An electronic malfunction caused a shaft winding engine drum to rotate in a direction opposite to that selected by the winding engine driver. Consequently, instead of the skip being lowered it moved upwards and was arrested by emergency braking initiated... Read more


Surface Nonmetal Mine (Crushed Stone) Fatal Machinery Accident G. Edgar Harr Son's Corp. (H4C) Cockeysville, Baltimore County, Maryland at Frederick

What A 58 year-old contract drill operator with 15 years drilling experience was fatally injured at a crushed stone operation. The victim had positioned the truck-mounted chassis drill, set the jacks and raised the truck chassis off the ground. He was... Read more


Surface Nonmetal Mine (Crushed Stone) Fatal Machinery Accident G. Edgar Harr Son's Corp. (H4C) Cockeysville, Baltimore County, Maryland at Frederick

What A 58 year-old contract drill operator with 15 years drilling experience was fatally injured at a crushed stone operation. The victim had positioned the truck-mounted chassis drill, set the jacks and raised the truck chassis off the ground. He was... Read more


COAL MINE FATALITY -Machinery

What Moving a stageloader to a new longwall section utilizing a water duke jack to keep the stageloader from sliding into the wide-side rib. A mechanic went to the duke jack location, presumably to reset the jack, but the duke... Read more


METAL/NON-METAL MINE FATALITY - Fatal Machinery Accident

What A tramway maintenance man was fatally injured when he was struck by a cable or jacking cylinders while aligning a cable for an aerial tramway. He was in a man basket aligning the load cable with a monocular scope while... Read more


Fatal Machinery Accident

What A tramway maintenance man was fatally injured when he was struck by a cable or jacking cylinders while aligning a cable for an aerial tramway. He was in a man basket aligning the load cable with a monocular scope while... Read more


COAL MINE FATALITY-Hand tools

Using a 5-ton ratchet-type jack to raise a belt Jacking the belt drive upwards either the drill steel slipped or the jack malfunctioned causing the drill steel to Kick, fatally striking the operator in his head ... Read more


Procedure for Safe Dogging of Steel Plates to Uneven Surfaces

Problem An inherent problem when performing dogging work is the competing requirements of sufficient weld on the dogging plate or strong back to acommodate the forces exerted by a hydraulic jacking cylinder or wedge and the ability to remove them from... Read more


Pressurized Fittings

A coal miner in Kentucky was injured when he attempted to bleed the pressure from a conveyor grease jack. The grease jack had the OEM relief type fitting broken and a standard grease fitting had been substituted ... Read more


ACCIDENT INVESTIGATION REPORT, Underground Coal Mine, FATAL MACHINERY ACCIDENT, Cumberland Mine (ID 36-05018), Cyprus Cumberland Resources Corporation, Kirby, Greene County,

Why Management failed to foresee the problem of controlling the stageloader assembly as it was pushed as a unit and the necessity of using duke jacks to assist in steering it. The duke jack sprang free as a result of high... Read more


Fatal Rolling Material - Boone County, West Virginia

What A 34-year old miner with 5 years mining experience was fatally injured while shovelling along a belt conveyor. The victim was using a shovel and sledge hammer to clean the belt conveyor walkway. He was struck by a large piece... Read more



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