Determination of velocity correction factors for real-time air velocity monitoring in underground mines

Lihong Zhou; Liming Yuan; Rick Thomas; Anthony Iannacchione

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Determination of velocity correction factors for real-time air velocity monitoring in underground mines

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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(R).The correction factors at each measuring station for both the centerline and the sensor location were calculated and are discussed.

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《国际煤炭科学技术学报（英文）》 |2017年第004期|322-332|共11页
作者
Lihong Zhou; Liming Yuan; Rick Thomas; Anthony Iannacchione;
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作者单位

Pittsburgh Mining Research Division, Office of Mine Safety and Health Research, National Institute for Occupational Safety and Health, PO Box 18070, 626 Cochrans Mill Road,Pittsburgh, PA 15236, USA;

Pittsburgh Mining Research Division, Office of Mine Safety and Health Research, National Institute for Occupational Safety and Health, PO Box 18070, 626 Cochrans Mill Road,Pittsburgh, PA 15236, USA;

Pittsburgh Mining Research Division, Office of Mine Safety and Health Research, National Institute for Occupational Safety and Health, PO Box 18070, 626 Cochrans Mill Road,Pittsburgh, PA 15236, USA;

University of Pittsburgh, Pittsburgh, PA, USA;

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Determination of velocity correction factors for real-time air velocity monitoring in underground mines

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