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Effect of water sprays on airflow movement and methane dilution at the working face.

Authors
Chilton-JE; Taylor-CD; Hall-EE; Timko-RJ
Source
Proceedings of the 11th U.S./North American Mine Ventilation Symposium, University Park, Pennsylvania, June 5-7, 2006. Mutmansky JM, Ramani RV. eds., London, U.K.: Taylor & Francis Group, 2006 Jun; :401-406
Link
NIOSHTIC No.
20030323
Abstract
NIOSH has been conducting research to determine the influence of mining machine-mounted water sprays on airflows and methane concentrations at the face when blowing ventilation systems are used. Tests were conducted in a full-scale ventilation gallery. Airflow speeds and directions were measured at several locations near the face with ultrasonic anemometers. Methane was released from the face and concentrations were measured in the entry at locations above the mining machine using fixed-point methanometers. Changes in airflow speed, direction, and methane concentrations were correlated with water spray operations. The test results using different spray arrangements and water pressures showed that operation of the machine-mounted sprayers can improve face ventilation effectiveness by increasing the velocity of airflow moving toward and away from the face. The improved ventilation resulted in reduced methane levels near the face.
Keywords
Mining-industry; Underground-mining; Coal-mining; Ventilation; Air-flow; Ventilation-systems
Contact
NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
CAS No.
74-82-8
Publication Date
20060605
Document Type
Conference/Symposia Proceedings
Editors
Mutmansky-JM; Ramani-RV
Fiscal Year
2006
NTIS Accession No.
NTIS Price
ISBN No.
0415401488
NIOSH Division
PRL
Priority Area
Research Tools and Approaches: Control Technology and Personal Protective Equipment
Source Name
Proceedings of the 11th U.S./North American Mine Ventilation Symposium, University Park, Pennsylvania, June 5-7, 2006
State
PA
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