Previous classification of rock mass surrounding underground excavations and rock support design using block models

The creation of tridimensional models that represent the quality and geomechanical characteristics rock mass to be excavated can made by using spatial interpolation techniques. aim this research is improve safety in underground activities, as well spread popularize use methods both continuity variables through geostatistical methods. This article presents demonstrates viability Q-System block estimated from borehole data for previous classification surrounding excavation support design. model design galleries justified because it allows previously forecast kind quantity necessary stability excavation, costs with these devices, besides increasing operations. Techniques indicator kriging ordinary were used build index model. was validated techniques visual inspection cross validation. study collected geotechnical description 39 core samples a total measurement 4,015 meters Fazenda Brasileiro Mine, located town Teofilândia, Bahia State, Brazil.