Estudos dos sistemas de descontinuidades em maciços rochosos, visando a extração de rochas ornamentais.

Abstract

The study of fractures is of great importance for the extraction of ornamental rock, as discontinuities can present themselves closed, open or filled and persistent, making it difficult to thus disassemble it to be executed, causing loss of material fractures or damage the entire block by misuse of the extraction method. The objectives of this paper are: a) the analysis of discontinuities in the rocky mass, Pocinhos-PB granite; b) map the existing fractures in the granitoid under study; c) develop a methodology for the treatment of discontinuities in the massif, aiming at the extraction of ornamental rocks. The field part of The survey was carried out in a Pocinhos white granite quarry, owned by Fuji S / A. The chosen granitoid presents good conditions for conducting the study, as it is in the process of research and a pilot bench has already been opened. The rock has a reserve of about 500,000 m3, with forecast favorable for future mining. The methodology comprises the steps a) quarry selection as a study area; b) location, GPS, the latitudes and longitudes of the points studied in the outcrop; c) survey of local data on discontinuities (joints, failures, fractures); d) elaboration of maps of fractures; e) making drawings using software; f) achievement statistical treatment in families of joints; g) interpretation of data and comparison with regional geology. With this work you could conclude that the analysis of discontinuities and the structure of the rocky mass and a very important factor for the extraction of ornamental rocks. It was also concluded that discontinuities in the studied batholith have a strong correlation with the structure geology called Patos Lineament, inferring that this regional feature caused the studied joints. In the studied body no we observed the existence of killings, which is a strong indication that the monkey has a low degree of compartmentalization.