APPLICATION OF Q-SLOPE METHOD IN SLOPE STABILITY ANALYSIS: CASE STUDY OF SINGLE SLOPE QUARRY A PT INDOCEMENT TUNGGAL PRAKARSA TBK. PLANT PALIMANAN, CIREBON DISTRICT, WEST JAVA

• Main Author: Saoma Ramadhan, Aziz
• Format: Final Project
• Language: Indonesia
• Subjects: Pertambangan dan operasi berkaitan
• Online Access: https://digilib.itb.ac.id/gdl/view/76549
• Institution: Institut Teknologi Bandung

This research was motivated by the lack of use of slope stability assessment methods that can be used in real time in the field during the slope excavation or civil construction process based on the actual characteristics of the slope in the field that can be observed visually. So this research aims to assess the accuracy of using the empirical Q-slope method in determining the beginning of slope stability based on visual descriptions of slopes in the field compared to slope stability analysis using the limit equilibrium method and numerical methods (finite element) using slope modeling with the help of software. The research was conducted at the Quarry A mining site of PT Indocement Tunggal Prakasa Tbk. Plant Palimanan, in three different slope locations, namely slopes with limestone lithology, slopes with sandstone lithology, and slopes with claystone lithology. The analysis begins with stereographic projection or kinematics analysis of the scanline data to obtain the orientation of the weak plane and failure potential. After that, it is continued with the slope stability analysis using the empirical Q-slope method, the output of this analysis is the Q-slope value and the optimum slope recommendation. In addition, statistical analysis is also conducted to obtain the best data distribution of physical and mechanical properties of rocks as input in the analysis by the boundary equilibrium method and numerical method (finite element) to obtain the Probability of Failure (PoF) value. Then, the slope geometry resulting from the application of the empirical Q-slope method will be analyzed by the limit equilibrium method to obtain the FS value (adjusted to the type of failure that has been obtained from the kinematics analysis) and by the finite element method to obtain the SRF value. The analysis with the finite element method is intended to strengthen the results of the slope stability analysis regardless of the type of failure. The results of this research have shown that there is alignment between the results of the analysis with the empirical Q-slope method and the results of the analysis with the limit equilibrium method and the numerical method (finite element), as proven by the safe values of the Factor of Safety (FS), Probability of Failure (PoF), and Strength Reduction Factor (SRF) for slopes that apply the Q-slope recommendation.