ANALISIS REALISASI KEGIATAN PRODUKSI BATUBARA TERHADAP RENCANA KERJA DI TAMBANG PIT 1 UTARA BANGKO BARAT PT. BUKIT ASAM TBK TANJUNG ENIM SUMATERA SELATAN

AKBAR, TOMY and Asyik, Makmur and Syarifuddin, Syarifuddin (2020) ANALISIS REALISASI KEGIATAN PRODUKSI BATUBARA TERHADAP RENCANA KERJA DI TAMBANG PIT 1 UTARA BANGKO BARAT PT. BUKIT ASAM TBK TANJUNG ENIM SUMATERA SELATAN. Undergraduate thesis, Sriwijaya University.

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Abstract

The coal production activity of PT. Bukit Asam Tbk is disegined in a monthly mining work plan. In July 2019, the coal production at Pit 1 Utara Banko Barat is expected to be 500,000 tons. Therefore, it is divided into 6 mining fleets consisting of 2 fleets Volvo EC480D (Au03 and Au04), 1 fleet Caterpillar CAT340D (Ex-4005), 1 fleet Komatsu PC400 (4001), 1 fleet Hitachi ZX350R (Ex-2072), and 1 fleet Komatsu PC1250 (Ex-1001). The result of production for the period of July 2019 referring to work plan achieved 438,743 tons or 87.74%. This illustrates that actually there have been an inappropriate coal production activities in accordance with the work plan. The discrepancy between the mining work plan and actual realization in the field is caused by three factors. Firstly, the actual number of applied fleets does not match and follow mining work plan as the result of factors such as breakdowns on the digging equipment and the rainfall. Secondly, the effective work hours cannot meet mining work plan standard due to losstime production that is not expected from the work plan, the effective work time was originally planned for 601,79 hours whereas it was reduced to only 361,67 hours (reduction of 39,93%). Thirdly, the productivity of the mechanical tools whose production rate cannot achieve the goal due to the low-rate of digging tools work efficiency (the work efficiency average of the tool is only 50%) and other factor such as the low bucket fill shows a number below 1 or <1 which means that the operators performance in digging the excavated material is less than optimal. Improvement efforts that can be done to solved this problem are optimizing the working time of mechanical tools by reducing losstime, so the value of work efficiency and productivity of each mechanical tools are increases. The theoretic calculation of coal production after improvement efforts was 644,686.23 tons or 118.94% of the target 500,000 tons.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Rencana Kerja, Realisasi, Ketidaksesuaian, Produksi Batubara
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN1-997 Mining engineering. Metallurgy T Technology > TN Mining engineering. Metallurgy > TN275-325 Practical mining operations. Safety measures
Divisions:	03-Faculty of Engineering > 31201-Mining Engineering (S1)
Depositing User:	Users 7677 not found.
Date Deposited:	10 Sep 2020 04:42
Last Modified:	10 Sep 2020 04:42
URI:	http://repository.unsri.ac.id/id/eprint/34895

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