Limestone

MNM Fatality – 1/4/23

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On January 4, 2023, a miner was fatally injured while performing maintenance inside a jaw crusher. The pitman assembly (moving jaw) rotated, pinning the miner against the crusher housing.

Best Practices

Operators should:

  • block machinery components against motion before beginning maintenance or repairs;
  • position miners in a safe location and away from potential pinch point areas;
  • conduct repairs according to manufacturer’s recommendations; and
  • develop procedures for working safely in confined spaces.

Additional Information

This is the first fatality reported in 2023, and the first classified as “Machinery.”

Click here for: Preliminary Report (pdf) Final Report (pdf).

MNM Fatality – 6/20/22 Underground

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A 50 year-old miner died when the excavator he was operating underground slid over an elevated loading pad and was engulfed by lime dust.

Best Practices: 

•    Conduct workplace examinations prior to beginning work and assure hazards are corrected.
•    Train miners to identify and report hazards and stay clear of potentially unstable areas.

Additional Information: 

This is the 15th fatality reported in 2022, and the fifth classified as “Machinery.”

Click here or: Preliminary Report (pdf), Final Report (pdf).

MNM Fatality – 12/3/21

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On December 3, 2021, a miner was fatally injured when he became entangled in the return idler on the belt conveyor under a portable crusher plant. 

Best Practices: 

  • Before performing maintenance and repair work near belt conveyors:
    • Remove power from the belt drive.
    • Securely block equipment against hazardous motion in accordance with manufacturer’s instructions.
  • Guard moving machine parts to protect miners from contacting moving parts.
  • Provide and maintain a safe means of access to all working places.
  • Conduct thorough examinations of equipment. Report defects and do not work in unsafe conditions.
  • Train miners to assess risks and control hazards before beginning work on belt conveyors.

Additional Information: 

This is the 33rd fatality reported in 2021, and the 16th classified as “Powered Haulage.”

Click here for: Preliminary Report (pdf), Final Report (pdf).

MNM Fatality – 1/7/22

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On January 7, 2022, a 49 year-old front-end loader operator with 15 years of mining experience died when a large rock fell from the mine roof, crushing the cab of the front-end loader.  When the accident occurred, the victim was loading material from a recently blasted shot. 

Best Practices: 

  • Scale the back and ribs before performing work in an area.
  • Conduct examinations of the back, face, and ribs where miners work and travel.
  • Install suitable ground support where conditions warrant.
  • Use geologic hazard mapping to identify adverse conditions and be aware of changing ground conditions.
  • Train miners to identify workplace hazards and take action to correct them.

Additional Information: 

This is the first fatality reported in 2022, and the first classified as “Fall of Roof or Back.”

Click here for: Preliminary Report (pdf), Final Report (pdf).

MNM Fatality – 8/3/21

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On August 3, 2021, a 62 year old Utility Person with 14 years 48 weeks experience* was run over by a customer tractor-trailer while walking to his normal work area at a mine in Bridgeport, TX with 83 employees*.

Best Practices: 

  • Assure adequate illumination sufficient to provide safe working conditions.
  • Communicate with mobile equipment operators and make eye contact to ensure they acknowledge your presence. Be aware of the location and traffic patterns of mobile equipment in your work area.
  • Wear high visibility clothing when working around mobile equipment.
  • Wear strobe lights near mobile equipment.
  • Assure traffic controls provide for safe movement of mobile equipment and are followed. Operate mobile equipment at reduced speeds in work areas.
  • Stay clear of normal paths of travel for mobile equipment and train all persons to recognize work place hazards.

Additional Information: 

This is the 23rd fatality reported in 2021, and the ninth classified as “Powered Haulage.” (*details added by safeminers.com from MSHA data.)

Click here for: Preliminary Report (pdf), Final Report (pdf).

MNM Fatality – 2/8/21

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On February 8, 2021, a 38 year old ground man* was fatally injured when he became entangled in a fluted tail pulley while attempting to shovel under an adjacent fluted tail pulley at a limestone min in Potosi, MO with 12 employees*.

Best Practices: 

  • Design, install, and maintain area guards with signage and locks in addition to the physical barrier.  Find more information on area guarding at https://www.msha.gov/guarding-slide-presentation-guarding-conveyor-belts-metal-and-nonmetal-mines.
  • Design and maintain secure guards so miners can perform routine maintenance on belt conveyor systems without contacting moving machine parts.
  • Do not perform work on a belt conveyor until the power is off, locked out and tagged, and machinery components are blocked against motion.
  • Never clean pulleys or idlers manually while belt conveyors are operating.
  • Establish policies and procedures for conducting specific tasks on belt conveyors.
  • Ensure that people assigned to work on belt conveyors are task trained, understand the associated hazards, and demonstrate safe work procedures before beginning work.
  • Ensure all new miners receive new miner training and task training.

Additional Information: 

This is the third fatality reported in 2021, and the second classified as “Powered Haulage.” *(details added by safeminers.com from MSHA data)

Click here for: Preliminary Report (pdf), Final Report (pdf).

MNM Fatality – 8/21/20

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On August 21, 2020, a (customer*) truck driver (at a Gilmore City, IA mine with 32 employees*) sustained fatal head injuries while he was deploying the automatic tarp on his fifth-wheel side-dump trailer.

Best Practices: 

  • Install and use constant pressure electrical switches to deploy/retract automatic trailer tarps.
  • Inspect and maintain tarping systems routinely to ensure tarping systems function properly.
  • Install signs warning of the hazard of standing near trailers while automatic tarps are deployed/retracted.
  • Train miners on proper tarping techniques to understand the hazards associated with the work being performed.

Additional Information: 

This is the sixth fatality classified as “Machinery” in 2020. (Fatal Alert posted by MSHA 11/30/20.* Italicized details added by safeminers.com)

Click here for: Preliminary Report (pdf), Final Report (pdf).

MNM Fatality – 5/21/20

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On May 21, 2020, two miners were working to hoist an electric motor from its base by anchoring a hoist to an overhead, unsecured steel pipe (at Missouri underground limestone mine with 51 employees*). The steel pipe slid out of place and struck one of the miners (60 year-old plant maintenance worker with 27 years and 9 weeks total mining experience*) in the head and back. The miner died on May 23, 2020, due to complications from his injuries.

Best Practices: 

  • Ensure load anchor locations are stable, substantial and adequate to support the load.
  • Establish and discuss safe work procedures before beginning work and ensure those procedures are followed.
  • Identify and control all hazards associated with the work to be performed and the methods to properly protect persons.
  • Follow the manufacturer’s recommended safe work procedures for the maintenance task.
  • Examine work areas for hazards that may be created as a result of the work being performed.
  • Position yourself in areas where you will not be exposed to hazards resulting from a sudden release of energy. Be aware of your location in relation to machine parts that can move.

Additional Information: 

This is the first fatality in 2020 classified as “Hand Tools.” *(Italicized details added by safeminers.com)

Click here for: Preliminary Report (pdf), Final Report (pdf).

MNM Fatality – 7/24/20

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On July 24, 2020, two miners were loading explosives from inside an aerial lift’s basket when the basket jolted upward into the mine roof, causing the death of one of the miners.

Best Practices: 

  • Check all equipment before using it. Report all defects affecting safety to a responsible person for correction.
  • Service and maintain hydraulic systems according to the manufacturer’s specifications and schedules. Excessive pressure in a hydraulic circuit can drastically alter the control of booms, etc., creating serious hazards.
  • Instruct aerial lift users on hazard recognition and safe job procedures to avoid unsafe conditions.
  • Train lift operators in safe operating procedures listed in the operator’s manual.
  • Report equipment malfunctions and remove the equipment from service until repaired.

Additional Information: 

This is the 12th fatality reported in 2020, and the third classified as “Machinery.”

Click here for: Preliminary Report (pdf), Final Report (pdf).

MNM Fatality – 6/19/20

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On June 19, 2020, a miner died while inspecting a stockpile for oversized material. As the victim walked along the toe of the stockpile, a portion of the stockpile collapsed, covering him with approximately four feet of material.

Best Practices: 

  • Establish and discuss safe work procedures before beginning work. Identify and control all hazards associated with the work to be performed and the methods to properly protect persons.
  • Task train everyone to recognize potential hazardous conditions that can decrease bank or slope stability and ensure they understand safe job procedures for eliminating hazards.
  • Stay clear of potentially unstable areas. Barricade the toe area to prevent access where hazards have not been corrected.
  • Oversteepened slopes may be flattened from the top of the stockpile by using a bulldozer to gradually cut down the slope.

Additional Information: 

This is the 10th fatality reported in 2020, and the first classified as “Falling, Rolling, or Sliding Rock or Material of Any Kind.”

Click here for: MSHA Preliminary Report (pdf), Final Report (pdf).