Illumination of Jumbo Drills in Metal and Nonmetal Mines.
Ketler AE; Auer JP
NTIS: PB 290-905 :63 pages
The objective of this program was to illuminate the underground working places of two jumbo drills in a metal mine to a level of 0.06 Foot lamberts. The required light is mounted on the machine and is operated from available power. Lighting analysis was based on direct illumination of 50 pct of the roof and upper ribs and indirect illumination of the balance. The face was illuminated by direct lighting. The total lumens required by analysis was 80,000. The program plan consisted of an analysis and design phase, followed by fabrication, installation, and test phases.
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