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All Journal Jurnal Teknika : Jurnal Teoritis dan Terapan Bidang Keteknikan Jurnal Riset Rumpun Ilmu Teknik (JURRITEK)
Yustinus Hendra Wiryanto
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Industrial & Manufacturing Engineering Mechanical Engineering

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COST COAL PROCESSING DI STOCKPILE PORT MUARA BENGALUN PT. MITRABARA ADIPERDANA, Tbk DESA MALINAU KOTA KECAMATAN MALINAU KOTA KABUPATEN MALINAU PROVINSI KALIMANTAN UTARA Dippos Donal Ikzen Panjaitan; Lisa Virgiyanti; Yustinus Hendra Wiryanto
JURNAL TEKNIKA Vol. 2 No. 1 (2018): Jurnal Teoritis dan Terapan Bidang Keteknikan
Publisher : Fakultas Teknik Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Proses pengolahan batubara secara aktual kegiatannya, membutuhkan biaya produksi sehingga di perlukannya analisis mengenai besaran biaya yang di butuhkan selama kegiatan produksi terhadap banyaknya tonase batubara yang dihasilkan serta dibandingkan dengan Plan Production Equipment Requirement Estimation (PERE). Dengan mengetahui besaran biaya yang dibutuhkan maka perusahaan dapat melakukan manajemen, kontrol, mengetahui penyebab dan upaya dalam menurunkan biaya tersebut. Pengolahan batubara yang dilakukan oleh PT. MA bertujuan untuk menghasilkan produk yang sesuai dengan permintaan konsumen yang terdiri dari kegiatan in-loading dan out-loading. Pada pengolahan batubara di PT.MA terdapat beberapa aktivitas kegiatan yang menjadi parameter perhitungan biaya yaitu : cost handle, cost handle crushing, cost crushing, cost barging dan cost coal barging yang mengacu pada penetapan Plan Hour Rate pada bulan Mei serta harga fuel sebesar $ 0,62. PT MA telah melakukan perencanaan terhadap peralatan serta biaya yang akan dikeluarkan. Berdasarkan perhitungan dan perbandingan biaya pada kegiatan pengolahan batubara yaitu cost handle $ 0,22/ton, cost handle crushing $ 0,186/ton, cost crushing 0,0484/ton, cost barging $ 0,1998/ton, dan cost coal barging $ 0,051/ton terdapat beberapa biaya serta kompenen peralatan yang tidak sesuai dengan perencanaan.
INTEGRASI SIG, PEMODELAN HIDROLOGI, DAN PEMODELAN HIDRAULIKA UNTUK PENENTUAN ELEVASI MUKA AIR BANJIR Nomeritae, Nomeritae; Stephanus Alexsander; Hendro Suyanto; Yustinus Hendra Wiryanto
Jurnal Teknika: Jurnal Teoritis dan Terapan Bidang Keteknikan Vol. 6 No. 2 (2023): Jurnal Teknika: Jurnal Teoritis dan Terapan Bidang Keteknikan, April 2023
Publisher : Fakultas Teknik Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52868/jt.v6i2.8204

Abstract

Penelitian ini bertujuan untuk menentukan elevasi Muka Air Banjir (MAB) dalam tahap perencanaan struktur melintang sungai (misalnya jembatan) dengan mengintegrasikan Sistem Informasi Geografis (SIG), model hidrologi dan model hidraulika. SIG berperan dalam analisis Catchment Area (CA), topografi, geometri sungai, serta penentuan tipe dan kelas tanah yang digunakan sebagai input dalam model hidrologi dan hidraulika. Pengalihragaman hujan menjadi aliran dalam analisis hidrologi menggunakan HEC-HMS, sedangkan analisis profil aliran menggunakan HEC-RAS 2D. Terdapat 4 (empat) titik jembatan yang direncanakan sebagai outlet CA dalam analisis delineasi CA. Besaran puncak banjir kala ulang 50 tahun untuk masing-masing outlet jembatan 1, 2, 3, dan 4 berturut-turut adalah 91.95 m3/s, 59.98 m3/s, 10.28 m3/s, dan 6.96 m3/s. Analisis hidraulika menunjukkan bahwa meskipun tebing kiri dan kanan sekitar jembatan terluapi, elevasi MAB dengan kala ulang 50 tahun masih berada di bawah lantai jembatan yang ada.
Analisis Manajemen Penimbunan Batubara pada Area Stockpile di PT. Barito Bangun Nusantara Manissa Rahayu; Deddy Nan Setya Putra Tanggara; Yustinus Hendra Wiryanto; I Putu Putrawiyanta; Lisa Virgiyanti
JURNAL RISET RUMPUN ILMU TEKNIK Vol. 5 No. 1 (2026): April: Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v5i1.7419

Abstract

PT. Barito Bangun Nusantara is a company engaged in coal exploration and production activities, where the production is temporarily stored in a stockpile area before being processed or distributed. Stockpile management requires attention to several important factors, such as area design and stockpiling methods, so that storage runs effectively and does not cause a decrease in coal quality. This study was conducted on old and new stockpiles with the aim of analyzing the actual stockpiling conditions and providing technical recommendations regarding the ideal stockpile capacity and configuration. The research methods included field observation, primary and secondary data collection, and descriptive quantitative analysis. The results showed that both stockpiles experienced inefficiencies due to excess capacity. The actual tonnage reached 49,191.98 tons, exceeding the planned capacity of 35,000 tons, with a stockpile height reaching 9 m. This condition caused long stacking times and the FIFO system did not operate optimally. The study recommended an ideal stockpile capacity of 30,740.61 tons, with a maximum height of 8 m. The recommended angle of repose for the old stockpile is 30°, with a capacity of 11,542.19 tons, while for the new stockpile, it's 34°, with a capacity of 19,198.42 tons. This arrangement is expected to allow for a smoother unloading process and a more ideal stockpile.
Efektifitas Metode Amalgamasi dan Metode Flotasi pada Proses Pengolahan Emas di Wilayah Pertambangan Rakyat (WPR) Yossa Hutajulu; Lisa Virgiyanti; Wisnu Rijati; Fahrul Indrajaya; Yustinus Hendra Wiryanto
JURAL RISET RUMPUN ILMU TEKNIK Vol. 5 No. 2 (2026): : Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v5i2.8669

Abstract

The amalgamation and flotation methods are widely used by miners because the methods are simple, fast and easy. The purpose of this study was aims to test the effectiveness of gold recovery using the amalgamation and flotation methods in conventional gold processing. The research methods used were observation and testing using the amalgamation and flotation methods in conventional gold processing. The effectiveness analysis was carried out by calculating the percentage of gold produced in the amalgamation and flotation processing methods. The test was carried out on 10 samples, each weighing 10 kg. The amalgamation process used a Hg solution, while flotation used a detergent reagent. The total primary gold processing using the amalgamation method was 11.46 grams, while the total primary gold recovery using the flotation method was 12.15 grams. The results of gold processing using the flotation method were higher than those using amalgamation because flotation can separate gold more efficiently from ore containing various impurity minerals. Meanwhile, the amalgamation method, which uses mercury, tends to be less effective and loses some of the gold because it only binds very fine and dispersed gold particles, while flotation can handle ore with lower gold content and larger gold particles.
Analisis Productivity PC 300 pada Kegiatan Coal Getting di PT. Asmin Bara Bronang Maura Rahmawati; Yustinus Hendra Wiryanto; Yos David Inso; Hepryandi Luwyk Djanas Usup; Asri Fridtriyanda
JURAL RISET RUMPUN ILMU TEKNIK Vol. 5 No. 2 (2026): : Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v5i2.8904

Abstract

This study was conducted at PT. Asmin Bara Bronang, Sepan Uring Village, Kapuas Tengah District, Kapuas Regency, Central Kalimantan Province, with the aim of analyzing the productivity and influencing factors of the PC 300 excavator in coal getting activities to support the achievement of production targets. The objective of this research is to analyze the actual productivity and the factors affecting it in Sector 7 coal getting operations. The research method used field observation with a quantitative descriptive analysis approach. The results show that the productivity of the PC 300 excavator ranges from 127.12 to 224.29 tons/hour, with an average of 173.98 tons/hour. In several conditions, the productivity is still below the company’s target of 180 tons/hour. The analysis indicates that productivity is influenced by material conditions, particularly the Hardgrove Grindability Index (HGI) value of 47, which reflects relatively harder material with coarser particle size, and a moisture content of 22.71%, causing the material to be sticky and cohesive, thereby affecting the bucket filling process. In addition, operational factors such as bottom loading patterns, limited number of tailgate dump trucks, and suboptimal selection of dump truck types also contribute to productivity performance.  Based on the findings, it can be concluded that the productivity of the PC 300 excavator has not consistently met the company’s target. Therefore, improvement efforts are required, including the implementation of top loading methods, increasing the number of tailgate dump trucks, optimizing the selection of hauling equipment, and controlling material conditions that affect the digging process.    
Co-Authors Asri Fridtriyanda Deddy Nan Setya Putra Tanggara Dippos Donal Ikzen Panjaitan Fahrul Indrajaya Hendro Suyanto Hepryandi Luwyk Djanas Usup I Putu Putrawiyanta Inso, Yos David Manissa Rahayu Maura Rahmawati Nomeritae, Nomeritae Stephanus Alexsander Virgiyanti, Lisa Wisnu Rijati Yossa Hutajulu