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Determination of velocity correction factors for real-time air velocity monitoring in underground mines
  • Published Date:
    Dec 2017
  • Publisher's site:
  • Source:
    Int J Coal Sci Technol. 4(4):322-332.
Filetype[PDF-985.58 KB]


Details:
  • Pubmed ID:
    29201495
  • Pubmed Central ID:
    PMC5709814
  • Description:
    When there are installations of air velocity sensors in the mining industry for real-time airflow monitoring, a problem exists with how the monitored air velocity at a fixed location corresponds to the average air velocity, which is used to determine the volume flow rate of air in an entry with the cross-sectional area. Correction factors have been practically employed to convert a measured centerline air velocity to the average air velocity. However, studies on the recommended correction factors of the sensor-measured air velocity to the average air velocity at cross sections are still lacking. A comprehensive airflow measurement was made at the Safety Research Coal Mine, Bruceton, PA, using three measuring methods including single-point reading, moving traverse, and fixed-point traverse. The air velocity distribution at each measuring station was analyzed using an air velocity contour map generated with Surfer®. The correction factors at each measuring station for both the centerline and the sensor location were calculated and are discussed.

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