HEAVY EQUIPMENT EFFICIENCY, PRODUCTIVITY AND COMPATIBILITY OF COAL MINE OVERBURDEN WORK IN EAST KALIMANTAN

A mining activity starts with clearing the land from plants and overburden stripping. The purpose of this study is to analyze the value of work efficiency, productivity, and compatibility of heavy equipment in overburden work. This research employs a descriptive method and includes a case study, then the data were obtained from observations. The research results found that the value of workload efficiency is 74.63% and the value of conveyance is 58.37%; while the productivity of loading equipment is 5,055 BCM/hour and conveyance is 5,189 BCM/hour; furthermore, the match factor level of the equipment is 0.65. However, the match factor level is still below the standard. Thus, further research is required to determine the appropriate strategy to make the equipment's match factor level equal to one