LEMOS, J. E. G.; http://lattes.cnpq.br/3361173242642082; LEMOS, Jonas Eduardo Gonzalez.
Resumen:
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.
