HIGHWALL SLOPE STABILITY ANALYSIS ON PT. ABC USING THE FINITE ELEMENT METHOD

• Main Author: WARDIMAN MANAN - NIM : 12114055 , MUHAMMAD
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/29360
• Institution: Institut Teknologi Bandung

<p align="justify">The increasing of coal prices in 2017 has encourage coal mining companies trying to increase it’s coal production. PT. ABC is a coal mining company that is currently making several scenarios to optimize coal production by lowering the relative level of pit floor at the final pit limit. For that purpose, PT. ABC must conduct a geotechnical study at the highwall slope target area to determine the stable overall slope value of the highwall slope which has a safety factor (SF) above 1.5. Slope stability analysis is performed with finite element method using Phase2 8.0 software, while litology modeling of highwall slope target area is carried out by borehole correlation using AutoCAD software. The calculation results obtained from Phase2 8.0 software are not value of SF but critical strength reduction factor (SRF) which is considered as SF. From the analysis result using the finite element method it is found that in Section 1 the overall slopes have to be used are 45o, 30o, and 30o for RLT 75m, RLT 25m, and RLT -25m respectively. In Section 2 the overall slopes have to be used are 25o, 20o, and 20o for RLT -50m, RLT -95m, and RLT -125m respectively. In Section 3 the overall slopes have to be used are 20o, 20o, 20o, 20o, and 20o for RLT -60m, RLT -120m, RLT -154m, RLT -167m, and RLT -190m respectively.<p align="justify">