Tecnologias de corte em rochas ornamentais dos Estados da Paraíba e Rio Grande do Norte.

Abstract

With the development of cutting methods, from the 1990s onwards, the last century, and new rigging technologies are better modern looms, rocks previously considered unviable for use in construction - abundant bustling pegmatites, migmatites and gneisses precambrian formations existing mainly in the Paraíba and Rio Grande do Norte, became part of the map of the producers of exotic ornamental "granites". Such rocks, notorious for their beauty and previously considered technologically and economically unviable, have become most sought after by the rich European and North American markets, leading unceasing pursuit of these rocks with patterns that escape the biotite shales with a high degree of metamorphism, pegmatites, especially homogeneous, chalky silicate such as tactites, fault zones, breaches and metaconglomeres among many others precambrian rocks, provided that they allow, in the mining fronts, the extraction of standard size blocks. Pre-existing works in the bibliography research lead to a conclusion that attests to the modernity of this new line of production. All mining engineering studies published on ornamental rocks, turn to those already traditionally known in the most often emphasizing more specified rock mining methods traditional granitics, this work is different because it is the result of direct practical monitoring at all stages of a productive process in selected "exotic" rocks, proposing to comment on the various most commonly used cutting types, with their proper applications and comments technical-economic.