Development of Optimized Diffuser and Spray Fan Systems for Coal Mine Face Ventilation.
NTIS: PB 277 987 Available for Reference At Bureau Libraries :256 pages
The objective was to determine configurations for a diffuser fan system and water spray (spray fan) system that will provide a maximum reduction in face methane concentrations without causing an increase in methane concentrations at the operator's position. A limited study was also performed to assess the effect of scrubber discharge location on methane concentrations in the face area. The results indicate that diffuser fan and spray fan systems that were designed to augment the natural airflow pattern in the entry could provide a factor of 3 to 5 reduction in average methane concentration at the face, compared with a mining machine with just conventional water sprays. The properly designed diffuser and spray fan systems also significantly reduced the total methane present in the entry. A properly designed dust scrubber discharge can reduce face methane levels by a factor of 2.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB 277 987 Available for Reference At Bureau Libraries