Avaliação de ruído em mineração de área urbana - caso Cimepar - João Pessoa/PB.

Abstract

The objective of this research is to analyse the noise that comes from a limestone quarry located in the urban area of Joao Pessoa city, capital of the state of Paraiba. A Portuguese group named CIMPOR actually owns the quarry. Initially a bibliographic review of the subject related to noise was made. It was found that very little has been published in Brazil concerning the specific topic of this research. The research was developed by measuring the noise originating from drilling, loading, hauling and crushing, using an equipment called dosimeter. This equipment provides the equivalent level of noise during the morning and afternoon shifts. To monitor the blasting operation, a sismograph was used in order to measure the airblast and the peak particle velocity. It has been found that the values measured by the dosimeter are sistematically higher than those allowed by Brazilian standards. For this reason, it is necessary a continuous utilization of individual protection equipments. Besides that an effective control and monitoring of the noise is needed. The values obtained from the sismograph for the airblast and the peak particle velocity are always smaller than those established by the NBR- 9653 Brazilian standards. Therefore, these parameters, have pointed out that the blasting operation can be considered as technically appropriate.