INTEGRATED DIFFERENTIAL INTERFEROMETRY SYNTHETIC APERTURE RADAR (DINSAR) AND GROUND-BASED RADAR FOR OPEN PIT SLOPE STABILITY MONITORING

• Main Author: Ridwan Maulana, Faris
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/69552
• Institution: Institut Teknologi Bandung

Excavation activities and stockpiling materials in the mining activity caused slopes to change the distribution of forces and stresses. As a result, the slopes will seek a new equilibrium by releasing the load through displacement or landslide. As one of the mitigation efforts, it is necessary to monitor the displacement that occurs on the slope using a device with high accuracy. Ground Based Radar considered to have good ability to identify displacements that occur in real-time. However, Ground Based Radar has a drawback, sensor on the device is weak to identify vertical displacement. One technology that is developing and has good ability to identify vertical displacement is satellite based DInSAR. With the integration of two methods, displacement that occurs horizontally and vertically on the slope can identify with high accurated. In addition, changes in rock mass conditions due to displacement can be predicted based on numerical analysis using the finite element method. To realize this, case study from the South Tutupan pit area of PT Adaro Indonesia was used. Based on target area, the displacement monitoring data used from December 10th, 2021 – April 9th, 2022. In that period, the horizontal and vertical displacements occurred on the slopes are 1247.34 mm and 292.5 mm, respectively. Based on the reference value, it is known that changes rock mass conditions are based on the results of numerical analysis in the form of a decrease in Young's Modulus value by 35% and the Strength Reduction Factor (SRF) value ranging from 1.300 – 1.647.