#TITLE_ALTERNATIVE#

• Main Author: SYAHPUTRA (NIM : 12106041); Pembimbing : Ir. Umar Hadi, HERWIN
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/18645
• Institution: Institut Teknologi Bandung

In coal mining industry, good planning and design must be done after coal reserves have been determined. Those must be done in order to achieve maximum profit. One of the important aspects in planning the coal mining is Stripping Ratio (SR). In this research, two types of calculation in Stripping Ratio had been done, which are the Break Even Stripping Ratio (BESR) and the Optimal Striping Ratio. Break Even Stripping Ratio is the limit of stripping ratio that could be used when the profit equals zero, while Optimal Stripping Ratio acts as the Stripping Ratio that would be done in mining operation. In this research, the calculation of Optimal Striping Ratio had been done through the approach of the most <br /> <br /> <br /> optimal Cash Margin and Net Present Value (NPV). <br /> <br /> <br /> This research took place at the Selatan Pit, Senakin Site, PT Arutmin Indonesia. According to calculation, the value of Break Even Stripping Ratio is 13,56 bcm/ton. The Optimal Striping Ratio would then be calculated from that value by using several scenarios of Striping Ratio, which are: SR 4,5; SR 5,5; SR 7,5; SR 9,5; SR 11,5; and SR 13,5. <br /> <br /> <br /> Based on the Cash Margin approach, the value of the Optimal Striping Ratio is 8,23 bcm/ton with a Cash Margin value of USD 35.856.150,00. While the value of Optimal SR based on Net Present Value is 8,02 bcm/ton with a relative NPV value of USD <br /> <br /> <br /> 26.289.110,00. <br /> <br /> <br /> Each approaching methods in this research (which yields optimal SR value) could give a conclusion that both methods shown that an increase in production does not always maximize profit. There is an optimum stripping ratio which at only that the level production could maximize profit.