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M. Puspita
Sriwijaya University
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PERFORMANCE AND OPERATIONAL COSTS OF STRIPPING OVERBURDEN AT PT BUMI SEKUNDANG ENIM ENERGY M. Puspita; S. Wijaya; E. Oktarinasari; F. Mahdyrianto; Erwedi
Jurnal Pertambangan Vol. 9 No. 3 (2025): Agustus 2025
Publisher : Fakultas Teknik Universitas Sriwijaya

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Abstract

The plan for overburden stripping at PT Bumi Sekundang Enim Energy's Pit AB was 332,829.17 BCM/month, but the company was unable to achieve this target. This study aims to evaluate the performance of overburden stripping, identify obstacles that affect overburden stripping, and calculate the costs of overburden stripping before and after improvements are made to overcome these obstacles. This study uses a descriptive-analytical quantitative approach with a case study at PT Bumi Sekundang Enim Energy. The actual productivity of the transport equipment obtained is 20.5 BCM/hour, lower than the specified target of 22.37 BCM/hour. The failure to achieve this overburden stripping was due to obstacles that reduced effective working time and mechanical equipment efficiency. Improvements were made to delay time and idle time, successfully reducing total downtime by 40.64%. As a result, mechanical equipment efficiency increased to 77.82%. After the improvements were made, the productivity of the transport equipment increased to 25.67 BCM/hour and the overburden stripping target was achieved with a percentage of 114.76%. The operational costs of overburden stripping consist of excavation and transportation costs by mechanical equipment. The costs taken into account include fuel, lubricants and filters, tire and undercarriage replacement, ground engaging tools replacement, and operator wages. The operational cost of stripping overburden before the improvement was Rp 20,473/BCM, but after the improvement, the cost decreased by 20.14% to Rp 16,350/bcm.
KONTRIBUSI SEKTOR PERTAMBANGAN BATUBARA TERHADAP PEMBANGUNAN BERKELANJUTAN: ANALISIS DATA PANEL REGIONAL SUMATERA SELATAN F. Mahdyrianto; M. Puspita; R. Fajri; I. Purwadi
Jurnal Pertambangan Vol. 10 No. 1 (2026): Februari 2026
Publisher : Fakultas Teknik Universitas Sriwijaya

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Sektor pertambangan batubara merupakan kontributor utama Produk Domestik Regional Bruto (PDRB) di Provinsi Sumatera Selatan, namun kontribusi ekonomi tersebut belum tentu sejalan dengan peningkatan kualitas pembangunan berkelanjutan daerah. Ketimpangan antara pertumbuhan ekonomi dan capaian sosial-lingkungan menimbulkan pertanyaan mengenai efektivitas sektor ekstraktif dalam mendorong pembangunan yang inklusif dan berkelanjutan. Penelitian ini bertujuan menganalisis pengaruh sektor pertambangan batubara terhadap pembangunan berkelanjutan kabupaten/kota di Provinsi Sumatera Selatan. Penelitian menggunakan pendekatan kuantitatif dengan data panel 14 kabupaten/kota periode 2015–2025. Variabel dependen adalah Indeks Pembangunan Berkelanjutan (IPB) yang dikonstruksi dari indikator ekonomi, sosial, dan lingkungan, sedangkan variabel independen utama adalah PDRB subsektor pertambangan batubara. Analisis dilakukan menggunakan regresi data panel dengan pendekatan Fixed Effect Model (FEM) berdasarkan hasil uji Chow dan Hausman. Hasil estimasi menunjukkan bahwa sektor pertambangan batubara tidak berpengaruh signifikan terhadap IPB (p-value 0,8201) dengan koefisien negatif sebesar -0,185. Temuan ini mengindikasikan bahwa besarnya kontribusi ekonomi batubara belum mampu mendorong peningkatan kualitas pembangunan berkelanjutan secara signifikan di tingkat daerah. Dengan demikian, diperlukan penguatan tata kelola dan optimalisasi pemanfaatan pendapatan sektor pertambangan untuk mendukung pembangunan jangka panjang yang lebih inklusif dan berkelanjutan.
MECHANICAL EQUIPMENT INVESTMENT ANALYSIS TO MEET PRODUCTION TARGETS AT PT ABC, NORTH BENGKULU R. Fajri.B; F. Mahdyrianto; M. Puspita
Jurnal Pertambangan Vol. 10 No. 2 (2026): Mei 2026
Publisher : Fakultas Teknik Universitas Sriwijaya

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The reallocation of production equipment to a subsidiary in 2025 significantly reduced fleet availability at PT ABC, preventing the company from meeting its annual coal production target of 617,000 tons. This decline in productivity necessitates immediate and meticulous investment planning for additional mechanical units to ensure long-term operational continuity. This study aims to analyze the requirements for loading and hauling equipment, calculate investment cost components, and determine the most efficient procurement scheme among cash purchase, leasing, and rental. Utilizing the Discounted Cash Flow (DCF) method, the research evaluates investment criteria such as Net Present Value (NPV), Internal Rate of Return (IRR), and Payback Period (PBP), while conducting a sensitivity analysis on coal price fluctuations and operational costs. The results indicate that the leasing scheme is the most profitable alternative, yielding the highest NPV of IDR 12,877.68 million, an IRR of 27.45%, and a payback period of 3.45 years. Sensitivity analysis reveals that a 5-10% decrease in coal prices exerts a more significant impact on declining profitability compared to an equivalent increase in operational costs. Consequently, the leasing scheme is recommended as the primary strategic choice due to its superior initial cash flow flexibility and market risk resilience.
EFFECT OF HAUL ROAD GEOMETRY ON THE HAULER PRODUCTIVITY IN COAL MINING Mega Puspita; Bochori; Arie Putra Usman
Jurnal Pertambangan Vol. 10 No. 3 (2026): Agustus 2026
Publisher : Fakultas Teknik Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/0g7gwj92

Abstract

In surface coal mining, haul road geometry directly influences vehicle travel times, motion resistances, and production output. In May 2025, coal production at PT X reached only 95.49% (28,399.74 tons) of its 29,741 ton target due to geometric bottlenecks along the 1.45-km haul road. This study evaluates the haul road geometry against Kepmen ESDM No. 1827 K/30/MEM/2018 and AASHTO standards, analyzing the productivity gains after geometric redesign. Primary data were gathered via GNSS RTK and clinometers, followed by rimpull-based cycle time modeling on a fleet of five Hino 500 FM 280 JD dump trucks. Field results revealed geometric non-compliances, including an excessive 10.06% grade on segment B–C (standard max. 8%), narrow curve widths on segments F–G (13.56 m) and K–L (11.01 m) against the 14.57 m standard, and substandard superelevation across all curves. The actual single-truck cycle time averaged 17.43 minutes, producing 44.83 tons/hour. Following geometric improvements—cutting the B–C grade to 6.28% and widening curves—cycle time decreased by 8.77% to 15.90 minutes. Consequently, single-truck productivity increased to 49.14 tons/hour (total fleet: 245.70 tons/hour), driving monthly output to 31,130.19 tons (104.67% of the target, reflecting a 9.61% increase). Aligning mine haul road geometry with technical standards significantly optimizes hauling efficiency and ensures production targets are met.
Co-Authors A. P. Gobel A. Triando A.M.M.Rus A.P. Wibowo Arie Putra Usman Bimbi Cahyaningsih Bochori Bochori . Bochori Bochori Diana Purbasari E. Ibrahim E. Oktarinasari Eddy Ibrahim Erwedi Erwedi Eva Oktarinasari F. Mahdyrianto F. Mahdyrianto H. Nashita I. D. A. Purbasari I. Marwanza I. Purwadi K. Dino Lusitania M. A. Azizi M. Asof M. D. Almentirado M. Ibrahim M. M. Ibrahim Mukiat . Nina Tanzerina R. Amalia R. Fajri R. Fajri.B R. M. Arafiq Rosihan Pebrianto S. Wijaya Sri Destita K T. Marbun Taufik Arief W. Dahani Y. Maulana