Avaliação geoestrutural e caracterização tecnológica do sienito marrom imperial localizado no município de João Alfredo-PE

Abstract

Through evaluating the fractures of rocky mass makes it possible to understand the forces that caused movements that generate their discontinuities. Such understanding isfundamental to control them, which results in a more efficient ornamental rock drilling andabetterexploitation,sincethedimensionsandqualityoftheblocksobtaineddepend mainly on the nature and equidistance of fractures controlled by the distribution of the active voltages, resulting in the reduction of the environmental liabilities so common in thistypeofextraction.Inthiswork,thestructuralanalysisoftheImperialBrownSienito is presented, located in the district of Umari, rural area of João Alfredo in Pernambuco-BRA. The data collected during the technical visit supplied a database used in the construction of stereographic projections androsette diagrams. Based on the results, it can be concluded that the SE-NW direction is the best cutting orientation for the development of the opening the quarry work for tension relieving and development of fracturesduringminingservices.Fortechnologicalcharacterization,theresultsobtained in the work were compared to those established by ABNT NBR 15845: 2010, NBR 12042: 1992 and ASTM C 615: 1992 standards. The Amsler physical indexes and wear tests satisfactorily met those standards. The data of the tests of resistance to simple compression and resistance to flexion shows that the rock endures a medium compression,slightlyinferiortotheoneestablishedbythementionednorms.According totheresultsandpetrographicanalysis,therockcannotbeappliedinhumidplacesand intense traffic, due to its degree of water absorption and simple compressive strength below the limits established by ASTM C615 and ABNT NBR15845