MSHA release Serious Accident Alert on Surface Blasting incident

Three miners preparing for a shot were struck with debris when it detonated prematurely on 11 December 2017, according to the latest serious accident alert from The Mine Safety and Health Administration. They were positioned about 130 yards from the face. One miner was standing between a pick-up truck and an excavator; the other two were under the excavator.

Best Practices:

• Consider mine specific conditions and rock strata when designing blasts to prevent fly rock.

• Closely follow mine policies and procedures through all phases of the blasting operation.

• Schedule blasting between shifts or on off-shifts.

• Utilize suitable blast shelters for all persons at the mine site during blasting.

• Use restricted areas for non-enclosed blasting operations.

• Keep coworkers away from the blaster.

• Always consider past ‘Fly Rock’ when determining your Blast Area and your Blast Area should as a minimum be 1 ½ times the furthest distance that any previous Fly Rock has traveled.



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