STABILITY ANALYSIS OF LOW WALL COAL SLOPES IN PT XYZ USING FINITE ELEMENTS METHODS

• Main Author: Aji Pangestu, Vicky
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/50081
• Institution: Institut Teknologi Bandung

Occupational Safety and Health (K3) is very important. For open pit mines, one of the things that must be considered is the stability of the slopes. If the bearing force of the slope is greater than the driving force, the slope will remain stable. However, if the driving force is greater than the holding force, then the slope is unsafe and allows landslides to occur. Therefore, analysis is needed to see the possibility of landslides. In this case, a numerical method analysis was carried out using a computer program based on the Finite Element method, namely Phase2 8.0. Then the recommended slope geometry is suitable and safe for the slope. The saturated slope modeling results show that the Strength Reduction Factor (SRF) value is 0.9 or the FK value is also 0.9 so that the slope is declared unsafe. Then slope dewatering is carried out so that the FK of the slopes becomes 1.25. Recommendations that can be made on these slopes are to make changes to the slope geometry, namely to taper the slope or reduce the height of the slope, or it can also be done to dewatering of the slope so that it can increase the slope safety factor. After sloping down the slope and draining the FK value becomes 1.58, but if the slope is reduced in height and drained, the FK value becomes 1.45, this indicates a safe slope because FK is above 1.3. In the sensitivity analysis, the reduction in groundwater level and the reduction in slope height did not significantly affect the increase in FK, while the reduction in slope angle was the most sensitive parameter or influencing the increase in slope FK, so it should be noted in modeling this time.