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All Journal Journals Mining Engineering : Bina Tambang Journal of Degraded and Mining Lands Management JRTI (Jurnal Riset Tindakan Indonesia)
Jukepsa Andas
Universitas Negeri Padang
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Evaluasi Flyrock untuk Jarak Aman Alat Menggunakan Metode Empiris Tito Abadi Nugraha; Riam Marlina A.; Tri Gamela Saldy; Jukepsa Andas
Journals Mining Engineering : Bina Tambang Vol 10, No 2 (2025): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan, Fakultas Teknik, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bina tambang.v10i2.135576

Abstract

Penelitian ini bertujuan untuk mengurangi jarak aman flyrok maksimum 35 m serta menganalisis prediksi jarak lemparan flyrock dan mengidentifikasi parameter peledakan paling berpengaruh terhadap keselamatan alat Kleemann Mobiscreen MSS 802 Evo di Quarry Bukit Tapuan. Metode penelitian adalah penelitian terapan dengan pendekatan empiris, menggunakan model analisis dimensi yang dikembangkan oleh Ebrahim Ghasemi serta rumus empiris Richard and Moore. Data yang dibutuhkan meliputi parameter geometri peledakan aktual, yaitu burden, spacing, stemming, kedalaman lubang ledak, diameter lubang ledak, powder factor, dan panjang rata-rata kolom bahan peledak, serta jarak lemparan flyrock yang diukur menggunakan drone. Persamaan empiris dilakukan untuk menentukan konstanta spesifik lokasi. Hasil penelitian menunjukkan bahwa stemming memiliki pengaruh yang kuat terhadap jarak lemparan flyrock, dengan nilai koefisien determinasi (R² = 81,23%) pada model empiris. Peledakan ujicoba yang dilakukan sebanyak 6 kali dengan pengawasan ketat pada stemming menghasilkan jarak lemparan aktual maksimum menjadi 35 meter, sehingga tujuan keselamatan yang diinginkan dapat tercapai.
Adapted overall equipment effectiveness for evaluating loading and hauling equipment performance in open-pit coal overburden removal Raihan Mhd Indrawan; Riam Marlina; Jukepsa Andas; Rizto Salia Zakri
JRTI (Jurnal Riset Tindakan Indonesia) Vol. 11 No. 1 (2026): JRTI (Jurnal Riset Tindakan Indonesia)
Publisher : IICET (Indonesian Institute for Counseling, Education and Therapy)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29210/30036932000

Abstract

Proper equipment functioning is essential to achieving overburden-removal targets in open-pit coal mining, yet independent assessments of Overall Equipment Effectiveness (OEE) for loading-hauling fleets at small Indonesian coal contractor operations remain scarce. This single-site, single-period descriptive case study quantified the productivity of one excavator and four dump trucks engaged in overburden-removal work at BBMM, Jambi, Indonesia, and simulated the potential productivity gain from raising OEE to the 85% world-class benchmark. Cycle times were sampled from ten independent field observations per hauling unit and four documented sub-phases per loading cycle, cross-checked against company production records. Primary data (cycle time, effective working hours) and secondary data (production targets, equipment records) collected in June 2025 were analyzed descriptively using an adapted OEE formulation (Availability × Utilization × Speed × Bucket Fill Factor) suited to BELT (belt-based excavating, loading, and transport) equipment, followed by scenario-based simulation at 85% OEE. Actual overburden production reached 213,566.96 BCM against a target of 216,036.00 BCM, a shortfall of 2,469.04 BCM (98.86% achievement). Adapted-OEE values across all units ranged from 71.2% to 75.2%, below the 85% benchmark, with utilization identified as the primary limiting factor. The 85% OEE scenario indicated potential productivity gains of up to 8,341 BCM/month for the excavator and 1,606–2,268 BCM/month for the dump trucks, corresponding to a 13–19% possible monthly production increase over current performance. Utilization losses, rather than mechanical unavailability, were found to be the main constraint on fleet efficiency, suggesting that targeted dispatching, reduced standby time, and effective-hour management offer greater production leverage than expanding maintenance staffing. This study offers a diagnostic approach applicable to similar small-fleet coal contractors facing overburden-removal shortfalls.
Co-Authors Ansosry Ansosry Bagas Aditya Permana Bambang Heriyadi Daffa Imammuti Heri Prabowo Hisni Rahmi Insani Sabilillah Mantul Sasmito Massytah Massytah Muhammad Fahrurrozi Satria Mulya Gusman Nata, Refky Adi Raihan Mhd Indrawan Randa Nofriyaldi Putma Rangga Agung Pribadi Heriawan Refky Adi Nata Ren, Gaofeng Riam Marlina Riam Marlina A Riam Marlina A. Rifky Pratama Putra Rizky Juniostal Saputra Rizto Salia Zakri Rudy Anarta Rusli HAR Saldy, Tri Gamela Syahmer, Verra Tito Abadi Nugraha Yoszi Mingsi Anaperta Yudi Arista Yulanda