The tailings dams, most of the times, present a high associated risk, considering the characteristics inherent to the materials that constitute them, and to the existing elevation processes to increase their storage capacity. Thus, studies related to security alert systems are important in order to guarantee alert procedures for the population that is at risk. In this context, this research aims to present a proposal for the installation of an emergency alert system in the secondary safety zone (ZSS) of the Gelado dam, in view of the existence of a
population affected by the hypothetical flood spot, presenting the budget of the system based on an actual project. It was also sought to verify the possibility of funding the alert system by the municipal entity, given that it annually collects financial resources from CFEM (Financial Compensation for the Exploration of Mineral Resources). The research methodology was developed based on three stages, the first step 1 - characterization of ZAS and ZSS; step 2 - definition of the location of the installation of the emergency alert system for the ice cream dam ZSS and; step 3 - determining the estimated budget of the alert system in the ZSS. The estimated value for the implementation of the entire alert system, including preventive and corrective maintenance, was R $ 1,678,224.25, being the system composed of five alert towers whose sound protection radius of each tower is 2 km, defined by a minimum sound volume of 70 decibels, sufficient to alert an estimated population of 4,075 inhabitants. It was also concluded that the city of Parauapebas could pay for the installation of the proposed system, since it is benefited annually with significant financial resources from CFEM, having received an average of R $ 457,813,870.35 in the last eleven years (resource that would represent a percentage of 0.37% of the implantation costs). The installation of the system in the ZSS of the Gelado dam would allow, in the event of a collapse, the agility when reporting the accident in the ZSS, implying a lower number of victims, considering that only ZAS has an emergency alert system installed.
|
