Using ultrasonic anemometers to evaluate factors affecting face ventilation effectiveness.
Taylor CD; Timko RJ; Thimons ED; Mal T
2005 SME Annual Meeting, February 28 - March 2, Salt Lake City, Utah, preprint 05-80. Littleton, CO, Society for Mining, Metallurgy, and Exploration, Inc., 2005 Feb; :1-7
A test system was developed for measuring airflow in the NIOSH Pittsburgh Research Laboratory's ventilation test gallery using a three-axis ultrasonic anemometer. The gallery was used to simulate face airflow conditions in underground mines having a blowing curtain. Airflow data collected at multiple sampling locations between the face and the end of the curtain were used to draw airflow profiles for different curtain setback distances, intake flow quantities, and entry widths. In addition, methane was released at the face, measured at the sampling locations, and displayed as methane distribution in the areas between the curtain and the face. Entry geometry had a significant effect on airflow patterns, and the flow patterns affected the distribution of methane in the entry. Flow measured at and parallel to the face was a good predictor of methane dilution and removal within 2 ft of the face.
Ventilation; Underground-mining; Coal-mining; Methanes; Airflow; Anemometry; Mining-industry
NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
Research Tools and Approaches: Control Technology and Personal Protective Equipment
2005 SME Annual Meeting, February 28 - March 2, Salt Lake City, Utah, preprint 05-80