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Siti Hardianti
Program Studi Teknik Pertambangan Batubara, Politeknik Akamigas Palembang
Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology

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Analisis Metode Perhitungan Kuantitas Batubara Di Stockpile ROM PT. XYZ Edwin Harsiga; Siti Hardianti; Ardhi Lufthansyah Hidayat
MINERAL Vol 9 No 1 (2024): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v9i1.5547

Abstract

PT XYZ had a method called the on book method to determine the amount of coal tonnage in the ROM stockpile.. This method used the initial stock from the survey calculation resut at the beginning of each month, the incoming coal to the stockpile used truck count method, and the outgoing coal from stockpile used weighbridge calculation. PT XYZ used the survey calculation results at the beginning of the next month rather than on book method result to determine the difference. The Coal tonnages based on survey result data on April 2 was 34.225,454 tons. Whereas, for the on-book calculation, the stock at March 2 was 38.409,083 tons, the coal in 2 March - 2 April was 71.154 tons, and the coal out of 2 March - 2 April was 67.994,52 tons, so the final stock obtained was 41.568,56 tons. The difference from those two methods comparison was 7.343,11 tons. This research discover the factors causing the differences between two methods i.e. incompatible vessel capacity on the truck counts tonnage calculation, disorganized stockpile patterns, declining ROM stockpile base conditions, spilled material, total station tools and weighbridges which had not been calibrated yet.
Analisis Kemajuan Tambang Bulanan Pada Aktivitas Overburden Removal Di PT “X” Kabupaten Muara Enim Provinsi Sumatera Selatan: Analysis Of Monthly Mine Progress on Overburden Removal Activity In PT “X” Muara Enim Regency, South Sumatera Province Siti Hardianti; Rinda Pasari; Maryana
MINERAL Vol 11 No 1 (2026): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/br69aw76

Abstract

Mining progress analysis was conducted by comparing the monthly plan with the results of the end-of-month survey. This study used a quantitative method, because it uses numbers in its analysis. The purpose of this study was to determine mining progress based on area, depth, and volume, compare survey progress, and analyze factors that influence the achievement of overburden production. Based on the comparison of the monthly plan and topography progress, the results of mining progress were obtained based on 100% area. Based on depth, different percentage achievements were obtained at each elevation ranging from 0% to 100%. And the achievement of mining progress based on volume was 52.20%. Factors that influenced the failure to achieve overburden production, both in terms of depth and volume, included: the use of equipment that did not comply with the plan so that the overburden fleet was not realized from the plan, high rainfall and reduced operating hours due to the month of Ramadan. Efforts that can be made to improve the achievement of overburden production include ensuring the suitability of the number and capacity of equipment according to the planned fleet, reducing bottlenecks, conducting routine equipment maintenance, and optimizing the drainage system so that mining activities continue to run during high rainfall.
Co-Authors Ardhi Lufthansyah Hidayat Edwin Harsiga Maryana Rinda Pasari