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Environmental questions, occupational health and safety management are each time, more recognized and required by civil society and public agencies in all levels. Some of the ore stores that are opened today will need in the future to be closed to comply with stronger environmental regulations, required by society through controlling environmental agencies. Those agencies require the stores to be air tight or to have an efficient system of dust and particulate airbone. One feasible possibility for this question is the storage of the ore in closed sheds, which demand a higher cost of implementation, but on the other hand, it has a low cost of operation. In closed stores, the lighting is very important, since it provides necessary conditions for the workers productivity, particularly in the case of a continuous twenty four hour working day. Also, in addition to safety management, there are questions which should be considered, namely, an adjusted illumination that stimulates productivity, throughout higher illuminance, higher contrast, less glare and at the same time is comfortable for the tasks that will be carried through that environment. In environments in which the particulate material is highly combustible, such as coal stores, an adequate and safety illumination is an elementary question and if badly designed, can cause fires, explosions and tragic disasters that can injure people and destroy the working area. This work was composed by reference to an extensive bibliographical revision. The first part is a review of lighting concepts; the second refers to health and safety matters, security in the work place and also reference to the lighting. The third part highlights the national and international rules for lighting and analyzes it's requests. The fourth part deal with hazardous areas and explosive atmospheres, and explains in simple terms what are classified areas, which are the criteria involved, the risks of common different types of dusts and related regulations. The fifth part explains about lighting of industrial stores, with related criteria used in an adequate lighting design standard. In the sixth part it outlines the selection of lighting fixtures, light bulbs and lighting ancillaries used for industrial applications available in the market. A case in a company in the state of São Paulo, that possesses storage facilities of coal dust was carried out. The results were analyzed through data collected throughout the store and the measurement of the illumination realized at different times of the day. Such data was compared to rules, regulations and best practices in order to decide on lighting adequacy of the store and alternatives to solve the encountered problems were proposed. The conclusion is that it is possible to contribute to a significant improvement in the installations that provide illumination in the ore stores by, standardizing them, providing adequate maintenance, substituting obsolete equipment and observing rules and regulations. These measures increases the productivity, security and comfort of the workers. This action also results in cost savings, less energy consumption and ensures cooperation with environmental sustainability and complies with the requirements of NBR ISO 14.000 series.

Contribuição a melhora das condições ambientais de trabalho através do aprimoramento da iluminação em galpões e pátios cobertos na indústria mineral.