Dimensionamento e desempenho de painéis HEA para desmonte a fogo

Abstract

Rock Blast is a technique based on experience and empirical formulations well established. Although the blasting design’s method and concepts are known, the biggest variable still is the stratum that the explosive is placed on. The rock mass has complex characteristics due to the presence of discontinuities, which influences how the rock blast goes. The biggest environmental impact from excavation by rock blasting and on open-pit mining is flyrock. It consists of the projection of rock boulder or splinter at the blast moment, which may hit a construction, buildings and causing damages and being a safety liability to people around. Therefore, slope protection is important at rock blasting operations. This work presents and analyses a new slope protection technique, developed by NUNES (2017), that uses high energy absorption metallic panels known as HEA’s panels. This technique was designed to be used at rock slope blasting at an industry zone. The case was accompanied and analyzed in order to verify its behavior on the subsequent blasting events. The analyses showed the technique had satisfactory development, with the advantage that flyrock is eliminated without the necessity of any other protection and being able to be used again on each excavation progress and as stabilizing lining to the remain rock slope after being excavated.