Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9153, 1986 Nov :1-37
The Bureau of Mines conducted one of the most extensive studies on surface mine illumination to date to assess the illumination needs of mobile surface mining machinery with respect to the visual tasks required of machinery operators. Field investigations were performed at 22 surface mining operations (coal and metal-nonmetal) within several mining regions of the United States. Visibility and illumination were measured for 159 visual tasks performed by equipment operators on or near 57 surface mining machines, including draglines, shovels, blasthole drills, bulldozers, loaders, haul trucks, graders, scrapers, and several service-type vehicles. The report shows that illumination and/or visibility could be improved for various visual tasks and makes recommendations for these improvements. Moreover, the report describes the various equipment studied, gives details of the instruments and measuring techniques used, and presents equations to calculate the luminance and illuminnace levels suggested for performing mining tasks. Tables are presented that compare values of illumination computed for workers in the 25- and 50-yr age groups. Appendixes to the report include a glossary of terms, abbreviations, symbols, and calibration and analysis procedures.
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9153