ANALYSIS OF THE EFECT OF BLASTING VIBRATION ON THE STABILITY OF HIGWALL SLOPE ON THE LOM DESIGN AT PT XYZ COAL MINE

• Main Author: Teng, William
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/57022
• Institution: Institut Teknologi Bandung

PT XYZ is an open-pit coal mining company in Indonesia. In its mining operations, PT XYZ carries out blasting activities. This blasting activity produces vibrations that will affect the stability of the slope, where the vibration is considered as a seismic load. Analysis of slope stability was carried out on the highwall slope LOM design to determine the maximum amount of explosives per time delay that the slope can handle. Seismic loads that produce a critical Safety Factor (FoS) and Probability of Failure (PoF) are determined as the maximum values that the slope can handle. FoS and PoF are calculated using Slide 6.0 software which preceded by statistical data processing for parameters such as cohesion and internal friction angle, in order to determine the mean, standard deviation, Rmax and Rmin, and the type of data distribution of for each rock lithology such as claystone, siltstone, and sandstone. Seismic load parameters are obtained from the regression of the blasting vibration measurement results. Based on the simulation, the maximum explosive charge per time delay is, 300kg at a distance of 50 meters, and 2600kg at a distance of 100 meters, and not recommended to use blasting at a distance of 25 meter or less with reference regard to transverse waves. Meanwhile, when referring to longitudinal waves, the maximum explosive charge per time delay is 200 kg at a distance of 25 meters, 800 kg at a distance of 2600 meters, and 800 kg at a distance of 100 meters.