Design of Lighting System for Surface Mine Projects
Abstract: Indian mining
illumination standard is based on incident light without mentioning about
uniformity ratio, but International Commission on Illumination (CIE), Austria
insists uniformity ratio. In a mine with low surface reflectance, the
surrounding illumination level is lower than the minimum lighting standard as
specified by various regulatory bodies. The surface brightness further reduces
in wet surface condition, and results in poor visibility. In the present study,
design was made both in mineral and overburden benches based on the minimum
acceptable reflected light and the reflected uniformity ratio. For the purpose
of comparison of various types of lighting systems, a stretch of 1.0 km long
haul road was considered. The design was attempted with five different types of
luminaries. Lamp mounting heights were varied at five steps, namely 8, 10, 12,
14 and 16 m. Design under wet condition incurs an excess cost 9.4 % for mineral
bench and 50 % for overburden bench haul roads. Designing under wet surface
condition ensures the minimum light level even under the worst condition of
surface reflectivity, with marginal increase in cost.
Author: Mangalpady Aruna,
Sunil M Jaralikar
Journal Code: jptkomputergg120045
