Wind Effects on the Measured Values by a Dust Sampler LV-5E

Abstract

Wind effects on the measured values by a dust sampler LV-5E are inspected in a laboratory wind tunnel. The wind direction was set at angles of 0°, 45° and 90° to the respiration direction. The wind velocity was changed from 1.0 to 5.0m/s. The results are that respirable dust values are not affected by the wind direction and the velocity, but total dust values tend to be reduced with increasing angles of the wind direction. When the wind velocity increases, the reduction of total dust values become more remarkable.
On-site experiments in coal mines showed similar results as in the laboratory experiment.