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 Results After 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 Operator March 2000

9. Miner & Bridge Operator January 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 Machine Conclusions 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