Notes
Slide Show
Outline
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"MSHA WEBCAST"
  • MSHA WEBCAST
  • WITH STAKEHOLDERS
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WEBCAST
  • Heightened awareness of fatal accidents involving remote control continuous mining machines


  • Update on proximity device – Dave Chirdon (MSHA)
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PROXIMITY PROTECTION SYSTEM
  • A safety system that provides proximity detection and machine shutdown when personnel are positioned in a hazardous area close to the machine.
  • Consists of:
    • beltpack unit worn by machine operator;
    • on-board logic and antenna;
    • receiver and transmitter that communicate warning and shutdown commands.
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PROXIMITY PROTECTION PROJECT PARTNERS
  • Nautilus International provides proximity protection system.
  • Massey Energy provides machine and miner for installation and field testing.
  • Joy Mining provides installation assistance and technical support.
  • MSHA coordinates activities; provides permissibility evaluation; and conducts field testing studies.
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PROXIMITY PROTECTION PROJECT STATUS
  • Permissible system designed and installed on Massey 12CM in April 2003
  • Field testing started in July 2003
  • Problems identified with on-board antenna and beltpack unit requiring re-design
  • Re-design completed and system currently being installed on Joy 12CM in Franklin, PA
  • Field testing expected to resume in early spring
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"COAL MINE FATALITY - On..."
  • COAL MINE FATALITY - On Friday, March 24, 1995, a maintenance trainee was fatally injured while working as a continuous mining machine helper. The continuous mining machine operator, utilizing a remote control, was in the process of tramming the continuous mining machine through a crosscut. The operator was walking in front of the machine as the machine moved toward him. The maintenance trainee was attending to the continuous mining machine power cable at the rear of the machine. When the continuous mining machine was "squirmed" the conveyor boom crushed the trainee against the inby rib of the crosscut. The victim had three weeks of mining experience.
  • The continuous mining machine operator's line of sight to the rear of the mining machine and the victim, a distance of thirty feet, was obstructed by illumination from the mining machine's headlight. Two other employees were in close proximity to the moving continuous mining machine, between the machine's operator and the victim.
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COAL MINE FATALITY - On Tuesday, April 18, 1995, at 2:10 a.m., an electrician helper was fatally injured while making repairs to a radio-remote controlled continuous mining machine. The electrician helper was positioned in the conveyor of the continuous miner during the installation of a hydraulic relief valve. The conveyor boom of the continuous miner was positioned against the roof and had been securely blocked. The helper remained in the conveyor to observe the relief valve for oil leaks while another miner energized the radio-remote. When the pan switch was engaged on the radio-remote control, the conveyor chain also started.

The electrician helper was forcibly pushed against the roof by the conveyor chain.
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COAL MINE FATALITY - On Monday, October 21, 1996, a continuous mining machine operator, using a radio remote control, had backed the continuous mining machine away from the face. The mining machine operator crawled inby, dragging the remote control unit, to the rear corner of the mining machine. The continuous mining machine's trailing cable rolled out of the side cable hook and fell onto the remote control unit inadvertently activating the left tram reverse control. The rear portion of the mining machine moved suddenly toward the right rib, crushing the continuous mining machine operator. Investigators found the remote control unit's "slide" tram control safety-device, taped in the activated position.
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COAL MINE FATALITY - On Friday, March 28, 1997, in Eighty-Four, Pennsylvania, two mechanics and a maintenance foreman were troubleshooting a remote-controlled continuous mining machine. During mining operations, the continuous mining machine was not functioning properly and had unexpectedly stopped while tramming out of a working place. One of the mechanics was crouching between the machine and the coal rib peering through a sight glass to observe the operation of the diagnostic lights of the remote-controlled circuit. The continuous mining machine pivoted suddenly, pinning the maintenance foreman and the crouching mechanic against the coal rib. The mechanic was fatally injured but the foreman only received minor injured.

                                                                                                                                                



Plan View of the Accident Area
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FATALITIES BY SHIFT
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FATALS BY DAY OF WEEK
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FATALITIES BY AGE
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FATALS BY TOTAL EXPERIENCE
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FATALS BY EXPERIENCE
AT MINE
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FATALS BY
JOB CLASSIFICATION
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