ABSTRACT
PT Daya Bara Nusantara is the coal company of KBPC Group, which is located in Bungo Regency, Jambi Province. The coal mining system is an open pit backfilling method with a combination of mechanical equipment to carry out mining activities to achieve a production rate of 6,000 tons per month. The mechanical equipment used in the excavation and loading activities is the Doosan 500LCV Excavator. The transportation used is a Hino500 CWB340 truck. The location is in Block A, which is transported for the purpose of stock pile transportation. The problem is not achieving the production target of 6,000 tons per month. Based on field data, production is currently at 5,588.56 tons per month. Based on the results of the study, the production capacity of the digging tool is 5,588.56 tons per month, and the conveyance capacity is 6,341.76 tons per month. The work efficiency is 59.42%, while the work efficiency for conveyance is 58.5%. Two ways were performed to increase the production of coal stripping. The first is to increase the efficiency of the tool. The increase in the work efficiency of the loading and unloading equipment is 67.9%, and the work efficiency of the hauling equipment is 66.67%. Production of digging and unloading increased to 6,386.12 tons per month, and conveyance production increased to 6,570.4 tons per month. The second is to reduce conveyance units. A mining operation that previously used 11 units was changed to 10 units of conveyance. After reducing the number of conveyance units, production from coal mining increased to 6,570.4 tons per month, with a match factor of 1.
