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James D. Noll , Larry Patts, Roy Grau

The Effects of Ventilation Controls and Environmental Cabs on Diesel Particulate Matter Concentrations in Some Limestone Mines. James D. Noll , Larry Patts, Roy Grau. CDC NIOSH Pittsburgh Research Center.

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James D. Noll , Larry Patts, Roy Grau

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  1. The Effects of Ventilation Controls and Environmental Cabs on Diesel Particulate Matter Concentrations in Some Limestone Mines James D. Noll, Larry Patts, Roy Grau CDC NIOSH Pittsburgh Research Center

  2. Underground Metal/nonmetal mines are implementing different types of control technologies to apply with the final PEL EC(5040)* > 160 160 μg/m3 TC EC(5040)* x (TC(5040) – blank)/EC2(5040)a TC (5040)* * - personal sample a – area sample

  3. Ventilation Maintenance Newer Engines < 160 μg/m3 TC from DPM Administrative controls Goal DPFs Enclosed Cabs Alternative fuels

  4. Area samples were taken in two underground stone mines and ventilation was measured intake Working area or face return

  5. Ventilation Two propeller fans were used to provide the main mine air Auxilary fans were used to direct the air to the face

  6. 660,000 cfm total Mine A 114,000 cfm 326,000 129,000 cfm

  7. 209,000 cfm 554,000 cfm total Mine B 316,000 cfm

  8. 5040 Results

  9. Mine A

  10. Mine B

  11. The ventilation packages used in these two mines did not reduce the DPM concentration below the final limit but reduced the DPM significantly to could allow for a variety of other controls to be used to reach the final PEL.

  12. Measured DPM concentration inside and outside of two cabs (older and newer unit).

  13. 5040 results

  14. 73% efficiency 93% efficiency 87 % efficiency 41 % efficiency

  15. Cab were over 90% efficient when the doors and windows were shut.

  16. Other types of controls (alternative fuels, dpfs, maintenance, newer engines, ventilations, etc.) Administrative controls e.g. limiting time of some miners in high concentrations of DPM Not all miners can be in enclosed cabs.

  17. Questions????

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