SLOPE STABILITY ANALYSIS USING GRAPHIC METHODS AT PT XYZ COPPER MINE, MALUKU PROVINCE

• Main Author: Ikhsan Pradana, M.
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/57465
• Institution: Institut Teknologi Bandung

Slope stability analysis using graphic method provides another alternative for approaching the value of the factor of safety, namely potential failure information of a slope based on the percentage of failure. This study aims to find out whether the slopes of copper mine owned by PT XYZ are safe from plane slides and wedge slides, obtaining a graph of the relationship between the overall slope angle and the probability of landslides, and providing the overall slope angle that is still stable for the slopes analyzed from PT XYZ. This mine has 3 pits, namely north west (NW), south west (SW), and east (E) where each zone has discontinuity data that representing the discontinuity of the zone. The percentage of failure value can be directly obtained through kinematic analysis using the Dips 7.0 software after inputting the discontinuity data, slope dip, slope dip direction, friction angle of the slope, lateral limit, and the type of slope failure for which the percentage of failure value is sought. Based on the results of the stability analysis conducted, it is known that there is a slope of PT XYZ that are not safe from plane and wedge failure, which is the left slopes of section B3 with percentage of plane failure is 20% and percentage of wedge failure is 20% and also the left slopes of section C1 with percentage of wedge failure is 10%. A graph of the relationship between the overall slope angle and the percentage of failure and its analysis is also obtained. The maximum overall slope angle of PT XYZ's slopes that are still stable is also obtained.