Underground

Fatality #1 for Coal Mining 2011

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On Thursday, January 27, 2011, a 19 year old underground miner with fifteen weeks of mining experience was killed when he became caught between the “V” shaped coal discharge guides adjacent to the discharge roller of the section conveyor belt. Both belt conveyors were operating at the time of the accident.

Best Practices

  • Train all employees thoroughly on the dangers of working or traveling around moving conveyor belts.
  • Never attempt to cross a moving belt conveyor, except at suitable cross-overs or cross-unders.
  • Install proper belt cross-overs and/or cross-unders at strategic locations, when height allows.
  • Be aware of locations where new miners are working or intend to travel.
  • Provide belt conveyor stop and start controls at areas where miners must access both sides of the conveyor. These areas should be provided with adequate crossing facilities (e.g. cross-overs or cross-unders).
  • Install adequate guarding at all conveyor belt pinch point locations.

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

Fatality #46 for Coal Mining 2010

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On Wednesday, October 27, 2010, 39-year old continuous mining machine helper, with approximately 4 years of mining experience, was killed when he was struck by a loaded shuttle car. The victim was in the No.7 Entry between crosscuts No.37 and No.38, repairing a ventilation curtain. This entry and adjoining crosscuts were being used to gain access to the ratio feeder, which was located in the No.6 Entry.

Best Practices

  • Before performing work in an active haulage travelway, stop mobile equipment until work has been completed and communicate your position and intended movements to mobile equipment operators.
  • Use approved transparent ventilation curtains to improve visibility.
  • Operate mobile equipment at safe speeds and sound audible warnings when making turns, reversing directions, approaching ventilation curtains, and any time the operator’s visibility is obstructed. The sound level of audible warnings must be significantly higher than that of ambient noise.
  • Place visible warning devices at all entrances to areas where work is to be performed in the active travelway of mobile equipment.
  • Be aware of blind spots when traveling in the same areas where mobile equipment operates.
  • Install proximity detection systems on mobile face equipment.
  • Always wear reflective clothing, or use permissible personal flashing lights, to ensure high visibility when necessary to walk or work where moving equipment operates.

For more information related to struck-by equipment accidents view the following link: MSHA – Safety Targets Program – Hit By Underground Equipment at www.msha.gov.

Click here for: MSHA Preliminary Report (pdf)

Fatality #45 for Coal Mining 2010

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On October 11, 2010, a 56 year old roof bolting machine operator with 31 years mining experience was killed in a roof fall. The victim was standing beside the roof bolting machine when a portion of a rock brow fell from between the roof bolts and struck him. The rock was approximately 6 feet long and 3 feet wide, and varied in thickness from approximately 7 inches, up to 24 inches.

Best Practices

  • Remain alert for changing roof conditions, and remove hazards immediately.
  • Roof brows that are created by a sudden change in mining height can create unsafe roof conditions and may require removal and/or additional roof support.
  • Know and always follow your Approved Roof Control Plan.
  • Don’t leave freshly cut roof unbolted for long periods of time.
  • Use roof screen, large roof bolt plates, or other surface controls to prevent rocks from falling between supports.
  • Train all miners to identify unsafe roof conditions that are encountered daily.
  • Conduct thorough examinations in areas where miners will work or travel before and after work is completed.
  • Please see the following information related to roof bolter safety in the following links:

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

MSHA Provides Winter Alert Materials

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The annual Winter Alert is ON! “Conditions at underground and surface coal mines can change dramatically during the winter months,” said Joseph A. Main, assistant secretary of labor for mine safety and health. “We must be ever mindful of the seasonal changes that can affect our work environments.”

Posters, decals, and a PowerPoint presentation focus on some underground issues, but a printable poster for surface is also available on the MSHA web site at http://www.msha.gov/FocusOn/WinterAlert2010/WinterAlert2010homepage.asp. Check it out!

Fatality #13 & #14 for Metal/Nonmetal Mining 2010

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On August 12, 2010, a 38 year-old maintenance technician with 3 years of experience and a 47 year-old operations miner with 21 years of experience died at an underground gold mine. They were working from the top of a conveyance in a 16-foot diameter ventilation shaft attempting to locate and free a blockage in a 24-inch-diameter aggregate delivery pipe. While the conveyance was near the 820 foot level, the entire pipe from the shaft collar to the 860 level broke away and fell to the bottom at the 1330 foot level. The pipe struck the conveyance as it fell, causing the hoist drum to break away from its support base. The victims were found at the bottom of the shaft.

Best Practices
  • Routinely examine pipe support structures for indications of excessive corrosion and cracked, missing, or damaged: clamps, brackets, support beams, and connections.
  • Conduct periodic visual and non-destructive examination on couplings and pipes for corrosion, abrasion thinning, cracking, and loose connections.
  • Inspect and test process monitoring systems to ensure safety controls are functioning properly.
  • Perform construction and maintenance in accordance with design drawings and specifications.
  • Minimize exposure to hazards by using equipment such as air cannons and vibrators to prevent or clear blockages.
  • Ensure that miners are in a safe position to avoid falling objects or materials.

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

Fatality #42 for Coal Mining 2010

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On Thursday, July 29, 2010, at approximately 11:55 a.m., the left side integral roof bolter operator on a continuous mining machine was fatally injured. The victim was struck with a portion of rib measuring approximately 276 inches long by 55 inches high and up to 16 inches thick. The accident occurred while cutting an overcast. The victim had installed one test bolt and was near the left rear bumper of the machine, when the accident occurred. The rock in the left rib sheared off pinning, the victim against the machine.

Best Practices
  • Develop a plan for cutting overcasts and train miners in the procedures and precautions.
  • Examine the roof and ribs frequently while working.
  • Take down or support any loose ribs or roof adequately before working or traveling in the affected area.
  • Be aware of changing roof and rib conditions, especially when working between the ribs and equipment.
  • Unless necessary, do not position yourself between any piece of machinery and the rib.
  • Where the mining process allows, remain within the confines of protective devices such as cabs, canopies and rib protectors whenever possible.
  • Install additional rib support prior to mining in areas where the roof or floor is cut above or below the coal seam, especially overcasts, loading points, etc.

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

Fatality #41 for Coal Mining 2010

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diagram of coal fatality number 41 for 2010On Friday, July 9, 2010, a 61-year old production foreman with 33 years mining experience was fatally injured when he was struck by a battery-powered ram car. The victim was last seen in the No. 6 entry just outby the intersection at crosscut No. 107. This intersection and adjoining crosscuts were being used to gain access to the ratio feeder located in the No. 5 entry.

Best Practices
  • Install proximity detection systems on mobile face equipment. See the proximity detection single source page on the MSHA web site.
  • Use approved translucent check curtains designed to allow mobile equipment to tram through.
  • Sound audible warnings when making turns, reversing directions, approaching ventilation curtains, and any time the operator’s visibility is obstructed. The sound level of audible warnings must be significantly higher than that of ambient noise.
  • Be aware of blind spots when travelling in mobile equipment travel ways.
  • Communicate your position and intended movements to mobile equipment operators.

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

Off-Road Tire Fires

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Two recent fires occurred that involved front-end loaders. These fires proved very dangerous to miners and fire fighters because the off-road tires exploded, resulting in a dangerous release of energy. Large off-road tires can throw debris 900 feet when they explode. Although the exploding tires did not injure anyone during these accidents, one front-end loader operator received burns and injuries when he jumped from the loader

Click here for: Safety Flyer (pdf)

Fatality #40 for Coal Mining 2010

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COAL MINE FATALITY – On Thursday, July 1, 2010, a 60-year old section electrician was fatally injured when he was run over by a shuttle car. The victim was last seen walking outby the face in a connecting crosscut. As the loaded shuttle car was leaving the continuous miner, the victim was discovered under the shuttle car.

Best Practices

  • Always sound the shuttle car alarm or bell when approaching and before traveling through check curtains.
  • Be aware of your location in relation to movement of equipment, especially in lower coal seams.
  • Wear reflective or florescent clothing to aid visibility when working around mobile equipment.
  • Train miners to use effective means of communication between themselves and equipment operators.
  • Develop and follow standard operating procedures for tramming shuttle cars.
  • Ensure all personnel are clear of the traveling path and turning radius before moving equipment.
  • Pursue new technology such as proximity detection to protect personnel and eliminate accidents of this type.

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

Fatality #39 for Coal Mining 2010

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On June 24, 2010, a 29 year old continuous mining machine operator with 12 years experience received fatal injuries when he was caught between the right rib and the remote controlled continuous mining machine he was operating.

Best Practices
     

  • Install MSHA approved Proximity Detection Systems on continuous mining machines.
    http://www.msha.gov/Accident_Prevention/...
  • Avoid “Red Zone” areas associated with remote controlled continuous mining machines and other mobile equipment.
    http://www.msha.gov/webcasts/coal2004/REDZONE2.pdf
  • Ensure equipment is being operated safely, especially in low mining heights, and slippery and uneven floor conditions.
  • Maintain equipment in a safe operating condition.
  • Observe work practices and provide timely feedback.

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Click here for: MSHA Preliminary Report (pdf), Spanish Fatalgram (pdf), MSHA Investigation Report (pdf).