Limestone

Fatality #18 for Metal/Nonmetal Mining 2010

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2010 MNM Fatality 18On October 16, 2010, a 52 year- old haul truck driver with 5 years of experience died at a crushed stone operation. He was using an air-powered hammer/chisel to clean hardened material on a belt conveyor tail pulley. The victim was positioned on top of the return side of the belt conveyor, facing the tail pulley, when the belt conveyor was energized, entangling him in the tail pulley.

Best Practices

  • Deenergize and block belt conveyors against motion before working near a drive, head, tail, and take-up pulleys.
  • Lock-out/tag-out all energy sources to belt conveyors before working on them.
  • Establish policies and procedures for conducting specific tasks on belt conveyors.
  • Ensure that persons are task trained and understand the hazards associated with the work being performed.
  • Maintain communications with all persons performing the task. Before re-starting belt conveyors, ensure that all persons are clear.

Click here for: MSHA Preliminary Report (pdf), MSHA Investigation Report (pdf), Overview(powerpoint), Overview (pdf).

Fatality #7 for Metal/Nonmetal Mining 2010

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On May 24, 2010, a 61-year-old maintenance foreman with 32 years of experience was fatally injured at a crushed stone operation. The victim entered a vertical roller mill without locking out the electrical power switch. The mill was started with the victim in the mill.

Best Practices

  • Always follow established lock-out and tag-out procedures.
  • Never rely on others to place your lock on electrical power switches.
  • Always post warning notices at the power switches.
  • Never enter machinery without ensuring the energy source is locked out.
  • Always test to ensure power is off after locking out.
  • Maintain power switch lock out mechanisms to function properly.

Click here for: MSHA Investigation Report (pdf), Overview (powerpoint), Overview (pdf), Spanish Fatalgram (pdf)

Fatality #5 for Metal/Nonmetal Mining 2010

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On May 5, 2010, a 21 year-old old contract driller with 1 year of experience was fatally injured at a crushed stone operation. The victim was repositioning a truck mounted drill. He lowered the mast and raised the leveling jacks to move the drill. The drill then rolled down a grade and struck him.

Best Practices

  • Maintain parking brakes to ensure proper function.
  • Always set parking brakes when leaving a vehicle unattended.
  • Ensure parking brake will hold the vehicle before exiting cab.
  • Use tire chocks when parking equipment on grades.
  • Never attempt to enter the cab of a runaway vehicle.

Click here for: MSHA Investigation Report(pdf), Overview(powerpoint), Overview(pdf), Spanish Fatalgram (pdf)

Fatality #2 for Metal/Nonmetal Mining 2009

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On January 17, 2009, a 48 year-old mill operator with 22 weeks of experience was fatally injured at a crushed stone milling operation. The victim was loading material into a hopper with a front-end loader. He entered the hopper to dislodge frozen bridged material that would not feed onto the belt conveyor below. Coworkers found the victim engulfed in the hopper.

Best Practices

  • Establish and review procedures to ensure all possible hazards have been identified and appropriate controls are in place to protect persons before beginning work.
  • Train miners in safe work procedures and hazard recognition, specifically when clearing blocked hoppers.
  • Lock out discharge operating controls.
  • Ensure a safety harness properly secured to a lanyard is worn and a second person is positioned outside to adjust the lanyard.
  • Management should routinely monitor these activities to ensure miners are protected from possible hazards.
  • Provide vibrating shakers to maintain material flow or mechanical means of safely removing material if hoppers experience recurring flow problems.

Click here for: MSHA Investigation Report(pdf), Overview(powerpoint), Overview(pdf)