Abstract
New legislation and new mining methods have resulted in a revival of interest in mine lighting, in which many problems remain unsolved. The mining engineer is required to ensure that the workings under his control are lighted to an extent which provides safe and efficient operating conditions. This paper describes some of the results of an attempt to approach mine lighting from the aspect of visibility underground. The effects of visibility on efficiency and safety are discussed. Typical illumination and luminance levels are described for various underground environments together with some details of the visual tasks which occur in them.
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