ANALYSIS OF SLOPE STABILITY DUE TO BLASTING OPERATIONS FROM THE JAKARTA-BANDUNG FAST TRAIN TUNNEL NUMBER 4 WITH THE LIMIT EQUILIBRIUM METHOD

• Main Author: Jalaludin, Haris
• Format: Final Project
• Language: Indonesia
• Subjects: Pertambangan dan operasi berkaitan
• Online Access: https://digilib.itb.ac.id/gdl/view/51644
• Institution: Institut Teknologi Bandung

PT. SINOHYDRO and PT. POWERCHINA with PT. DAHANA (Persero) is currently constructing the Jakarta-Bandung Fast Train Tunnel No.4 in Purwakarta Regency. The tunnel construction was carried out by blasting operations, so it was feared that it could affect the stability of the slopes around the tunnel which is close to the quarry mining area and residential areas. So it is necessary to analyze the slope stability, determine the limit of vibration, and the limits of the amount of explosive charge per delay time to maintain slope stability. First, the relationship between PPA and PPV was determined based on field measurement data. Furthermore, the relationship between PPV and Scaled Distance (SD) was obtained using Blastware 10.74 based on field measurement data. The study slopes were modeled along with the stratigraphy using Rocscience Slide v6.0. Slope stability calculations are performed statically and dynamically. In determining the safety limit for vibration, the calculation is carried out by changing the seismic load (a) until the slope has a minimum Safety Factor value based on the Decree of the Minister of Energy and Mineral Resources 1827 of 2018. The results of this study are slope stability analysis (static FK and dynamic FK) based on field measurement data, maximum PPV value, and maximum explosive load weight per delay. The results of the slope stability analysis showed that the slopes was safe because static FK and dynamic FK were 1.608 and 1.339. The maximum PPV value is 11.15 mm/s. The maximum explosive charge weight per delay at a distance of 100 m is 37.5 kg.