MNM Fatality (2) – 1/27/23

On January 27, 2023, at approximately 6:25 a.m., CharQuaveiun Bloodsaw, a 23 year-old contract haul truck operator with 48 weeks of mining experience, and Damian Asberry, a 25 year-old contract haul truck operator with seven years of mining experience, were electrocuted. An energized high-voltage power line contacted their haul trucks, resulting in fatal electric shocks when they exited the cabs of their haul trucks. 

There was no Fatal Alert posted by MSHA for these fatalities.

Additional Information

Click here for: Preliminary Report 1 (pdf), Preliminary Report 2 (pdf), Final Report (pdf).

Coal Fatality – 9/1/22

On September 1, 2022, a roof bolter was electrocuted when he contacted a metal hook that became energized after it penetrated the 480-volt cable that supplied electrical power to a roof bolting machine.

Best Practices: 

  • Make sure miners use suitable, non-conductive ropes when pulling or handling electrical cables. 
  • Never attach conductive parts, such as metallic hooks, to the portions of non-conductive ropes that contact electrical cables.
  • Make sure miners use proper Personal Protective Equipment when handling cables, such as insulated gloves.

Additional Information: 

This is the 20th fatality reported in 2022, and the first classified as “Electrical.”

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

MNM Fatality – 11/17/21

On November 17, 2021, an 18 year-old* customer truck driver with no mining experience* was electrocuted after the tarping mechanism on the trailer contacted a high-voltage overhead power line at a mine with 10 employees*.  While exiting the cab of the truck, the victim contacted the energized truck and received a nonfatal electrical shock.  When he tried to reenter the cab of the truck, he was electrocuted.

Best Practices: 

  • Construct roadways to provide adequate width and clearance between mobile equipment and energized high-voltage power lines, as required by the National Electrical Safety Code.  Evaluate clearances periodically to account for changing physical and environmental conditions.
  • Provide and maintain a safe location for truck drivers to tarp their loads.
  • Check for overhead hazards when raising and lowering truck beds and tarps.
  • If your vehicle contacts an energized power line:
    • Stay in your vehicle.
    • Immediately call for help on a mobile phone or radio.
    • If staying in the vehicle is unsafe, jump away from the vehicle without contacting the vehicle and the ground at the same time.  Once on the ground, hop away from the power line for at least 40 feet.
  • Post readily visible warning signs or signals when overhead hazards exist.

Additional Information: 

This is the 32nd fatality reported in 2021, and the first classified as “Electrical.” (*details added by safeminers.com from MSHA data.)

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

MNM Fatality – 11/23/20

On November 23, 2020 (at a mine in Houston, TX with 12 employees*), a (39 year old Maintenance Mechanic with 1 year 7 weeks experience*) was electrocuted while troubleshooting a disconnect box for the classifier drive motor. The victim had the electrical disconnect box open and the main power supply was not deenergized.

Best Practices: 

  • Ensure electrical circuit components are properly designed and installed by qualified electrical personnel.
  • Ensure electrical troubleshooting and work are performed by people with proper electrical qualifications. Positively identify the circuit on which work will be conducted.
  • Before performing electrical work, locate the visual disconnect away from an enclosure and open it, lock it, and tag it, to ensure all electrical components in the enclosure are de-energized. Verify by testing for voltage using properly rated test equipment.
  • Wear properly rated and well maintained personal protective equipment, including arc flash protection such as a hood, gloves, shirt and pants.
  • Train miners on safe work practices for electrical equipment and circuits.

Additional Information: 

This is the 26th fatality reported in 2020, and the second classified as “Electrical.”  (* Italicized details added by safeminers.com from MSHA data)

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

MNM Fatality – 7/9/20

On July 9, 2020, a mine superintendent was electrocuted while attempting to reverse the polarity of a 4,160 VAC circuit by switching the leads inside an energized 4,160 VAC enclosure that contained a vacuum circuit breaker and disconnect.

Best Practices: 

  • Follow these steps before performing electrical work inside a high voltage enclosure:
    1. Locate the high voltage visual disconnect away from the enclosure that supplies incoming electrical power to the enclosure.
    2. Open the visual disconnect to provide visual evidence that the incoming power cable(s) or conductors have been de-energized.
    3. Lock-out and tag-out the visual disconnect yourself. Never rely on others to do this for you.
    4. Ground the de-energized conductors.
  • Verify circuits are de-energized using properly rated electrical meters and non-contact voltage testers.
  • Ensure properly qualified miners perform all work on high voltage equipment.
  • Wear properly rated and well maintained personal protective equipment, including arc flash protection such as a hood, gloves, shirt and pants.
  • Train miners on safe work practices for high voltage electrical equipment and circuits.

Additional Information: 

This is the 11th fatality reported in 2020, and the first classified as “electrical.”

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

2019 Fatality #20 / Coal #10

On September 17, 2019, an electrician was electrocuted when he contacted an energized conductor. The victim contacted a 995 VAC connector while attempting to troubleshoot the scrubber motor circuit on a continuous mining machine.

Best Practices: 

  • Lock out and tag out the electrical circuit yourself. Never rely on others to do this for you.
  • BEFORE performing electrical work:
    • Open the circuit breaker or load break switch away from the enclosure to de-energize the incoming power cables or conductors.
    • Open the visual disconnect away from the enclosure to confirm that the incoming power cables or conductors have been de-energized.
    • Lock out and tag out the visual disconnect.
    • Ground the de-energized phase conductors.
  • Wear properly rated and well maintained electrical gloves when troubleshooting or testing energized circuits.  After the electrical problem has been found, follow the proper steps before performing electrical work.
  • Use properly rated electrical meters and non-contact voltage testers to ensure electrical circuits have been de-energized.
  • Only use qualified, trained workers. Ensure electrical work is performed by a qualified electrician or someone trained to do electrical work under a qualified electrician’s direct supervision.
  • Identify circuits and circuit breakers. Properly identify all electrical circuits and circuit breakers before troubleshooting or performing electrical work.

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

2019 Fatality #16 / MNM #10

On Friday August 15, 2019, a 44-year-old contract electrician with 10 weeks of mining experience was electrocuted when he contacted a 120V cable while working inside a fire suppression system’s electrical panel.

Best Practices: 

  • Ensure miners receive proper training on all electrical related tasks. 
  • Ensure that circuit breakers and switches are properly labeled.
  • Properly lock-out and tag-out electrical circuits prior to working on them.
  • Wear properly rated and well maintained personal protective equipment while troubleshooting or testing energized circuits. 
  • Use properly insulated tools when performing electrical work.
  • Use properly rated electrical meters and non-contact voltage testers to ensure electrical circuits have been de-energized prior to performing electrical work. 

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

2019 Fatality #15 / Coal #6

On Wednesday, August 7, 2019, a 42-year-old preparation plant electrician with 15 years of mining experience was electrocuted when he contacted an energized connection of a 4,160 VAC electrical circuit. The victim was in the plant’s Motor Control Center (MCC) adjusting the linkage between the disconnect lever and the internal components of the 4,160 VAC panel supplying power to the plant feed belt motors.

Best Practices: 

  • Lock Out and Tag Out the electrical circuit yourself and NEVER rely on others to do this for you.
  • Control Hazardous Energy!  Design and arrange MCCs so electrical equipment can be serviced without hazards.  Install and maintain a main disconnecting means located at a readily accessible point capable of disconnecting all ungrounded conductors from the circuit to safely service the equipment.
  • Install warning labels on line side terminals of circuit breakers and switches indicating that the terminal lugs remain energized when the circuit breaker or switch is open.
  • Before performing troubleshooting or electrical type work, develop a plan, communicate and discuss the plan with qualified electricians to ensure the task can be completed without creating hazardous situations.
  • Follow these steps BEFORE entering an electrical enclosure or performing electrical work: (1) Locate the circuit breaker or load break switch away from the enclosure and open it to de-energize the incoming power cable(s) or conductors. (2) Locate the visual disconnect away from the enclosure and open it to provide visual evidence that the incoming power cable(s) or conductors have been de-energized. (3) Lock-out and tag-out the visual disconnect. (4) Ground the de-energized conductors.
  • Wear properly rated and maintained electrical gloves when troubleshooting or testing energized circuits.
  • Focus on the task at hand and ensure safe work practices to complete the service.  A second qualified electrician should double check to ensure you have followed all necessary safety precautions.
  • Use properly rated electrical meters and non-contact voltage testers to ensure electrical circuits have been de-energized.

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

Fatality #2 for Coal 2018

On Wednesday, February 21, 2018, a 38-year-old highwall mining machine operator, with 21 years of total mining experience, was electrocuted when he contacted an energized connection of a 7,200 volt electrical circuit.  The victim was found inside a transformer station troubleshooting and/or performing electrical work on the electrical system that supplies power to the mining machine.

Best Practices: 
  • Lock-Out and Tag-Out the electrical circuit yourself and NEVER rely on others to do this for you.
  • Follow these steps BEFORE entering an electrical enclosure or performing electrical work:
    1. Locate the circuit breaker or load break switch away from the enclosure and open it to de-energize the incoming power cable(s) or conductors.
    2. Locate the visual disconnect away from the enclosure and open it to provide visual evidence that the incoming power cable(s) or conductors have been de-energized.
    3. Lock-out and tag-out the visual disconnect.
    4. Ground the de-energized conductors.
  • Wear properly rated and well maintained electrical gloves when troubleshooting or testing energized circuits.  After the electrical problem has been found, follow the proper steps before performing electrical work
  • Use properly rated electrical meters and non-contact voltage testers to ensure electrical circuits have been de-energized.
  • Install warning labels on line side terminals of circuit breakers and switches stating that the terminal lugs remain energized when the circuit breaker or switch is open.
  • ​Electrical work must be performed by a qualified electrician or someone trained to do electrical work under the direct supervision of a qualified electrician.

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

Fatality #5 for Metal/Nonmetal Mining 2017

On July 14, 2017, a part time mine employee was moving irrigation pipe by hand and was electrocuted when the pipe came in contact with high voltage transmission lines overhead.

Best Practices

  • Before work begins, conduct a hazard assessment and examine the work area to identify and correct hazards and ensure safe distances to overhead power lines.
  • Contact the electrical utility to determine the operating voltage of the line and confirm the safe limits of approach distances.
  • Do not use electrically conductive tools or materials in situations where they may contact overhead power lines.

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