Measurement and Construction of Dust Distribution Maps for Longwall Faces.
Peng SS; Chiang HS
For Reference Only At Bureau Libraries :110 pages
This report describes the development of dust distribution maps to aid in the prevention of the production and spread of airborne dust. Air velocity and flow patterns were measured by velometers and smoke tubes positioned at the 3d or 5th support from the head entry t-junction, at the 11th and every 10th support thereafter, with the last station located at the tail entry t-junction. Moving and fixed real-time aerosol monitor surveys also measured respirable dust both near the shearer and the support advance. Airflow distribution along the longwall face differed among the five mines surveyed as well as from face to face within the same mine. The most important contributing factor seemed to be the air leakage conditions in the gob. Location of high dust concentrations are identified and the techniques to control them are discussed.
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