Dust Control on Auger-type Mining Machines Using the Wet Auger System.
NTIS: PB/273-517 Available for Reference At Bureau Libraries :88 pages
Control of respirable dust produced by auger-type continuous-mining machines is normally attempted by water sprays from fixed nozzles mounted on the frame of the machine. In tests conducted under this contract, a wet auger system was used, where the spray nozzles were mounted on the rotating auger itself. Operating the mining machine in the wet auger mode, it was found to produce 47 pct less respirable dust than when the fixed conventional sprays were used. On section dust levels were reducedto 3.5 Mg/m3, which is equivalent to approximately 2.0 Mg/m3 for a full shift portal to portal. The major difficulty to overcome was the development of a simple reliable water transfer mechanism to get the water into the rotating augers. This was achieved by developing a water-through-shaft-water system. This system can be retrofitted to existing machines and it is available in kit form.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/273-517 Available for Reference At Bureau Libraries
Dresser Industries Inc.