Determination of velocity correction factors for real-time air velocity monitoring in underground mines
Determination of velocity correction factors for real-time air velocity monitoring in underground mines作者机构：Pittsburgh Mining Research Division Office of Mine Safetyand Health Research National Institute for OccupationalSafety and Health PO Box 18070 626 Cochrans Mill RoadPittsburgh PA 15236 USA University of Pittsburgh Pittsburgh PA USA
出 版 物：《International Journal of Coal Science & Technology》 (国际煤炭科学技术学报（英文）)
年 卷 期：2017年第4卷第4期
页 面：322-332页
核心收录：
主 题：Underground mine Airflow measurement - Correction factor
摘 要：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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