Underground

Fatality #5 for Metal/Nonmetal Mining 2011

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On April 25, 2011, a 31 year- old drill operator with 6 weeks of experience was killed at an underground crushed stone operation. He was walking in a crosscut when a slab of roof, approximately 5 feet wide by 6 feet long by 10 inches thick, struck him.

Best Practices

  • Train persons to identify work place hazards and take action to correct them.
  • Design, install, and maintain a support system to control the ground in places where persons work or travel.
  • Examine and test ground conditions in areas where work is to be performed prior to work commencing and as ground conditions warrant during the shift.
  • When ground conditions create a hazard to persons, install additional ground support before other work is permitted in the affected area.
  • Be alert to any change of ground conditions.

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

Fatality #4 for Coal Mining 2011

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On Friday, March 25, 2011, a 54-year old continuous mining machine operator with 35 years of experience was killed when he was caught between the coal rib and the conveyor boom of the remote controlled continuous mining machine he was operating.

Best Practices
  • AVOID “RED ZONES”!!! Prior to tramming the continuous mining machine to a new place, ensure the machine operator is positioned outside the turning radius of the machine. MSHA Red Zone webcast (pdf)
  • Prior to tramming the continuous mining machine to a new place, ensure the tip of the conveyor boom is positioned on the side of the mining machine opposite to the side where the machine operator is located.
  • Install MSHA approved Proximity Detection Systems on continuous mining machines. Proximity Detection Single Source
  • Assign another miner to assist the continuous mining machine operator. Train all persons in the programs, policies, and procedures for operating or working near remote controlled continuous mining machines. Additional information on preventing these types of accidents can be found at: MSHA’s Safety Targets Program Hit By Underground Equipment.

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

Fatality #4 for Metal/Nonmetal Mining 2011

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On April 15, 2011, a 53 year- old miner with 26 years of experience was killed at an underground silver operation. He was wetting a muck pile in a stope when a fall of back, approximately 90 feet long, struck him.

Best Practices

  • Design, install, and maintain a support system to control the ground in places where persons work or travel.
  • Examine and test ground conditions in areas where work is to be performed prior to work commencing and as ground conditions warrant during the shift.
  • When ground conditions create a hazard to persons, install additional ground support before other work is permitted in the affected area.
  • Analyze extraction ratios and backfill methods and characteristics to improve stability.
  • Be alert to any change of ground conditions.

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

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)