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Base de datos CISDOC

ID (ISN) del documento52962
Número CIS 89-2085
ISSN - Título de la serie 0829-0369 - Travail et santé
Año 1989
Número de serie
Autor(es) Desnoyers L., Dumont D.
Título Cap lamps and visibility in mines: an exploratory study
Título original Lampes de chapeau et visibilité dans les mines: une étude exploratoire [en francés]
Información bibliográfica Fall 1989, Vol.5, No.3, p.S19-S23. 7 ref.
Resumen Three lamp models were tested. Illumination levels, measured 2 meters in front of the lamps, varied from 380 to 2500 lux when the lamps were adjusted for narrow beam lighting (approximately 5° of arc). Adjusting the lamps for wide beam lighting reduced centre-field illumination by 80 to 90% while increasing levels in the immediate periphery. At the end of the 7 hour shifts, illumination levels produced by new lamps were reduced by 45 to 60%. Used lamps were still in service which gave off only 2/3 to 1/4 of the illumination produced by new lamps. Rockface reflectance averages only 9 to 22% and therefore miners use their lamps set for narrow beam illumination, in order to obtain high enough luminances. However, this also produces luminance ratios as high as 350:1 between the center of the visual field and its immediate periphery. This value is 100 times more than the maximum level recommended to avoid glare.
Descriptores (primarios) explotación minera en el fondo; valoración de la visibilidad; lámparas de casco
Descriptores (secundarios) iluminación
Tipo de documento D - Artículos periódicos
Tema(s) Minas y canteras
Broad subject area(s) Fisiología, ergonomía
Navegación por categoria(s) Lighting and colour