ANALYSIS OF A NUMBERS OF SUBTRACT IN THE PIT MODEL OF 3-DIMENSIONAL FINITE ELEMENT METHOD

The geological model in 3-dimensional slope stability analysis represents the condition/shape characteristic of the actual rock lithology distribution, either laterally or vertically. The reconstruction of the 3-dimensional geological model is carried out by interpolating the rock lithology core information data resulting from geotechnical softwares. However, there are limitations when reconstructing geological models obtained from other software with the pit model which causes a large numbers of subtract to be formed. These will cause failure in the analysis using a high mesh type due to the number of elements and nodes formed too much. This study focused on analyzing the effect of reducing a numbers of subtract by cutting parts of the pit model to a critical section, in order to increase efficiency and reduce computation time