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Using ultrasonic anemometers to evaluate face ventilation conditions.

Authors
Hall-E; Taylor-C; Chilton-J
Source
2007 SME Annual Meeting and Exhibit, February 25-28, Denver Colorado, Preprint 07-096. Littleton, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2007 Feb; :1-5
Link
NIOSHTIC No.
20031823
Abstract
The fact that methane ignitions continue to occur at the mining face indicates that monitoring with machine-mounted methanometers does not always indicate the presence of high methane concentrations. Methane concentrations at the face change quickly due to changes in airflow. By measuring these changes in airflow, it may be possible to predict changes in face methane levels more quickly. Currently there are no techniques or instruments to accurately measure airflow in by the mouth of the ventilation curtain or tubing. Tests conducted in the NIOSH ventilation test gallery compare the data provided by one-, two-, and three-axis ultrasonic anemometers. The effects of changes in airflow direction and turbulence on instrument readings are discussed, and guidelines are given for selecting the type of instruments to be used for monitoring airflow near the mining face.
Keywords
Ventilation; Underground-mining; Coal-mining; Methanes; Airflow; Anemometry; Mining-industry
Contact
NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
Publication Date
20070225
Document Type
Conference/Symposia Proceedings
Fiscal Year
2007
NTIS Accession No.
NTIS Price
NIOSH Division
PRL
Source Name
2007 SME Annual Meeting and Exhibit, February 25-28, Denver Colorado, Preprint 07-096
State
PA
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