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All Journal Jurnal Ners Jurnal Indonesia Sosial Teknologi Blantika : Multidisciplinary Journal
Nursani, Rodiyah
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Computer Science & IT Economics, Econometrics & Finance Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Medicine & Pharmacology Nursing Public Health Social Sciences

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Journal : Blantika : Multidisciplinary Journal

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Evaluasi Produktivitas Excavator Komatsu Pc 1250 dan OHT Komatsu 785 pada Pengupasan Overburden Pada Bulan Februari Pt Dizamatra Powerindo Lahat Sumatera Selatan Delti, Delti; Husni, Ahmad; Nursani, Rodiyah
Blantika: Multidisciplinary Journal Vol. 3 No. 9 (2025): Special Issue
Publisher : PT. Publikasiku Academic Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57096/blantika.v3i9.408

Abstract

PT Dizamatra Powerindo merupakan perusahaan independen di bidang pertambangan batubara dengan target produksi 378.000 ton dan target pengupasan overburden sebesar 2.872.800 BCM pada tahun 2025. Penelitian ini bertujuan untuk mengevaluasi produktivitas alat gali muat excavator Komatsu PC 1250 dan alat angkut OHT Komatsu 785 dalam kegiatan pengupasan overburden di Pit Tengah. Metode penelitian menggunakan pengambilan data cycle time sebanyak 30 data pada bulan Februari 2025 dengan pendekatan observasi langsung dan pengolahan data statistik. Hasil penelitian menunjukkan produktivitas alat gali muat sebesar 542,029 BCM/jam dengan cycle time rata-rata 22,29 detik, sedangkan produktivitas alat angkut mencapai 103,617 BCM/jam dengan cycle time rata-rata 17,49 menit. Efisiensi kerja mencapai 83% dengan match factor 0,76, yang menunjukkan adanya waktu tunggu bagi alat gali muat menunggu alat angkut. Untuk mengoptimalkan kinerja unit dan mencapai match factor 0,95, disarankan pengurangan jumlah unit alat angkut menjadi 5 unit untuk mengurangi waktu tunggu alat gali muat. Faktor-faktor yang mempengaruhi produktivitas meliputi kondisi jalan angkut, cuaca, bucket fill factor (0,71), dan swell factor (0,85). Penelitian ini memberikan kontribusi dalam optimasi operasional penambangan batubara khususnya dalam pengupasan overburden menggunakan alat berat.
Analisis Pengendalian Air Asam Tambang Menggunakan Kapur Tohor pada KPL AL-14 (Taman) Site Tambang Air Laya PT Bukit Asam TBK Tanjung Enim Sumatera Selatan Supriyanto, Agus; Husni, Ahmad; Nursani, Rodiyah
Blantika: Multidisciplinary Journal Vol. 3 No. 12 (2025): Blantika: Multidisciplinary Journal
Publisher : PT. Publikasiku Academic Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57096/blantika.v3i12.471

Abstract

This study discusses the control of acid mine drainage (AMD) using quicklime (CaO) in the AL-14 (Taman) Sludge Settling Pond (KPL) at the Air Laya Mine site of PT Bukit Asam Tbk, Tanjung Enim, South Sumatra. Acid mine drainage is waste formed due to the oxidation of sulfide minerals, which can degrade water quality and damage the environment. This study aims to analyze the AMD control system, determine the ideal dosage of quicklime, calculate liming costs, and identify factors that influence daily lime requirements. The research method used is an experimental and observational approach, including laboratory tests using the jar test method and direct observations in the field during the period of April 28 to June 30, 2025. Tests were conducted on acid mine drainage samples with varying doses of quicklime (0–0.5 gr/L) to determine the optimum dose for increasing pH and reducing TSS. The test results showed that the ideal dose of quicklime to increase pH from 5.20 to the standard range (6–9) is between 0.1121–0.2812 gr/L, with an actual requirement of approximately 5 sacks/day. However, field usage reached an average of 10 sacks/day, causing cost overruns of up to Rp 381,600,000/month. The main factors influencing lime requirements are rainfall and runoff flow. This study provides recommendations for the implementation of an automatic monitoring system and blending system to improve the efficiency of AAT processing and reduce chemical waste.
Co-Authors Agus Supriyanto Delti, Delti Husni, Ahmad Suhardiman Gumanti, Suhardiman Yovanda, Ridho