#TITLE_ALTERNATIVE#

• Main Author: FIRMANSYAH (NIM 12104059), IMAN
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/12241
• Institution: Institut Teknologi Bandung

There are some parameters in determining the quality of coal, such as Calorific Value (CV), Total Moisture (TM), Total Sulphur (TS), Hardgroove Grinability Index (HGI), etc. Compared with other parameters, the one which straightly related with coal mining is HGI.<p> <br /> <br /> <br /> <br /> <br /> <br /> <br /> Hardgroove Grindability Index (HGI) means the ease level (index) of coal to get grinded. The higher it is means the easier for coal to be grinded. This HGI parameter could also used to explain the hardness level of coal. The lower it is means the harder the coal.<p> <br /> <br /> <br /> <br /> <br /> <br /> <br /> The coal mining, which is done by PT. Bukit Makmur Mandiri Utama (BUMA) jobsite ADARO, use open pit mining method. The mining proccess use the combination of loading units (PC 1250-7 and PC 1250-8) with hauling units (HD-785). The productivity target of the company is 550 mt/hour for each loading unit. This productivity is calculated from the average loading units productivity from all PT. XYZ jobsites.<p> <br /> <br /> <br /> <br /> <br /> <br /> <br /> The loading units location placement must get bigger attention because wrong placement means an overall productivity reduction. The PC 1250-7 capability productivity will drastically decrease if it placed to work on coal with 37 HGI.