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NOISE SOURCE IDENTIFICATION PROJECT CONTINUOUS MINER TEAM

NOISE SOURCE IDENTIFICATION PROJECT CONTINUOUS MINER TEAM. Fairchild Mining Machine. Fairchild Model 410 Auger Type Operator’s Compartment 1 Operator and no helper Fairchild Haulmark Continuous Haulage 4 Operators No operator compartment. Miner Operators. Bridge Operator Summary.

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NOISE SOURCE IDENTIFICATION PROJECT CONTINUOUS MINER TEAM

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  1. NOISE SOURCE IDENTIFICATION PROJECT CONTINUOUS MINER TEAM

  2. Fairchild Mining Machine • Fairchild Model 410 • Auger Type • Operator’s Compartment • 1 Operator and no helper • Fairchild Haulmark Continuous Haulage • 4 Operators • No operator compartment

  3. Miner Operators

  4. Bridge Operator Summary

  5. Significant Changes • Miner operator changes positions with bridge operator at midshift • Switch with #2 instead of #4 • Plexiglas Barrier • Between operator and conveyor chain

  6. Dosimeter ResultsAfter Modifications

  7. Joy Mining Machines • Joy 14AA CM • Remote Control • Scrubber Capacity 3997 • 13 Horsepower motor • Silencer package installed in August • 1 bridge operator

  8. Miner & Bridge OperatorMarch 2000

  9. Miner & Bridge OperatorJanuary 2001

  10. Tivar Conveyor Deck • Joy 14 CM • Full face miner with Integral Bolters • Auxiliary Fans

  11. Noise Level Readings • 87 dbA with fan only • 93 dbA motors only • 102 dbA with chain only • Chain is dominant noise source • 101 dbA left ear - 474% Dose • 97 dbA right ear - 272% Dose

  12. Eimco Mining Machines • 2810-2 Continuous Mining Machine • Remote Control • Silenced Fan Housing • 30 HP motor • 6000 CFM capacity

  13. Miner Operators

  14. Bridge Operators Summary

  15. Significant Findings • Mining: 96 - 99 dBA with scrubber • Scrubber exhaust: 102 dBA

  16. Scrubbers • Sleeve style attenuator • 30 or 40 HP only • Bolt on attenuator • Foam wrap on deflector • Foam wrap around housing • 30 or 40 HP only • Silenced fan housing • Proper fan blade clearance

  17. Auxiliary Fans • Silencers • Enclose fans as much as possible • Tubing maintenance • Holes • Loose connections

  18. Continuous Mining MachineConclusions • Chain conveyor is primary source of noise • Scrubber is secondary source of noise • Insulation of motors and pumps show limited results • Replace bent conveyor flights or sides • Proper operator positioning • Barriers where possible

  19. Future Work • Coated conveyor flights • with Consol, Joy, NIOSH • Scrubbers with crossover ductwork • Initial survey conducted 2/14/01

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