Studi Pemodelan Empirik Peak Particel Velocity (PPV) Tambang Bawah Tanah PT Freeport Indonesia

Abstract

PT Freeport Indonesia (PTFI) is mining copper and gold deposits in Papua, Indonesia. One of the mining locations that needs the company's attention is the Deep Mill Level Zone (DMLZ) underground mine, especially in undercut level blasting activities. In blasting activities, there is a part of the energy that passes through the rock mass in the form of vibration. Ground vibration can affect the stability of the opening hole and can cause collapse. In this study soil vibration data obtained from field measurements were calculated to obtain Peak Particle Velocity (PPV). From soil vibration measurement data from March 30, 2019 to May 7, 2019, analysis was carried out using the geometric model non-linear regression method (power regression) and a comparison between the scaled distance (SD) and peak particle velocity (PPV) values obtained actually. Power regression analysis produces an equation to predict PPV values, namely USBM (Duvall &; Fogelson, 1962) PPV = 934.24(SD)-1.116, Langefors and Kihlstrom PPV = 553.53(SD)-1.08, Ambraseys-Hendron, PPV = 2654.9(SD)-1.149.