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All Journal Jurnal Riset Teknik Pertambangan Bandung Conference Series: Mining Engineering ETHOS: Jurnal Penelitian dan Pengabdian kepada Masyarakat
Elfida Moralista
Fakultas Teknik, Universitas Islam Bandung
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology

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Penentuan Remaining Service Life Struktur Conveyor B pada Tambang Batubara PT XYZ Yodi Kurniawan; Elfida Moralista; Zaenal
Jurnal Riset Teknik Pertambangan Volume 3, No. 1, Juli 2023, Jurnal Riset Teknik Pertambangan (JRTP)
Publisher : UPT Publikasi Ilmiah Unisba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jrtp.v3i1.786

Abstract

Abstract. In the mining industry, mining material transfer activities require tools that are able to move materials effectively and efficiently, including conveyors. conveyors made from carbon steel are prone to corrosion due to environmental influences. As a result, corrosion that occurs can reduce the remaining life of the conveyor. Therefore, corrosion control is necessary in order to prevent the rate of corrosion in the conveyor structure and increase the production of processing of excavation materials. The environmental conditions of the research area had an average rainfall amount of 325.88 mm / year, an average air temperature of 32.68°C/year and an average relative humidity of 90.91%/ year. The study was conducted on a 90-meter-long conveyor structure. Research aims to find out the type of corrosion, corrosion control, corrosion rate and the remaining life of the conveyor structure. The type of corrosion on the conveyor structure is even corrosion. The corrosion control method used is a coating method with a 3 layer system consisting of Seaguard 5000 primary coating, Sherglass FF intermediate coating and Aliphatic Acrylic Modified Polyurethane top coating. Corrosion rates in conveyor structures range from 0.1763 – 0.3013 mm/year. The life of the conveyor structure is 8 years and the remaining life of use ranges from 6.04 - 9.34 years. Thus there are 32% or 8 test points that are predicted not to reach the design age of 15 years. Abstrak. Pada industri pertambangan, kegiatan pemindahan material tambang membutuhkan alat yang mampu memindahkan material secara efektif dan efisien, diantaranya adalah conveyor. Conveyor berbahan dasar baja karbon yang rawan mengalami korosi akibat pengaruh lingkungan. Akibatnya, korosi yang terjadi dapat mengurangi sisa umur pakai conveyor. Oleh karena itu, perlu dilakukannya pengendalian korosi agar dapat mencegah laju korosi pada struktur conveyor dan meningkatkan produksi pengolahan bahan galian. Metodologi penelitian yang digunakan adalah pengukuran pengurangan ketebalan struktur conveyor. Kondisi lingkungan daerah penelitian memiliki jumlah curah hujan rata-rata sebesar 325,88 mm/tahun, temperatur udara rata-rata sebesar 32,68°C/tahun dan kelembaban relatif rata-rata sebesar 90,91%/tahun. Penelitian dilakukan pada struktur conveyor sepanjang 90 meter. Penelitian bertujuan untuk mengetahui jenis korosi, pengendalian korosi, laju korosi dan sisa umur pakai struktur conveyor. Jenis korosi pada struktur conveyor adalah korosi merata. Metode pengendalian korosi yang digunakan yaitu metode coating dengan sistem 3 layer yang terdiri dari primer coating Seaguard 5000, intermediate coating Sherglass FF dan top coating Aliphatic Acrylic Modified Polyurethane. Laju korosi pada struktur conveyor berkisar antara 0,1763 – 0,3013 mm/tahun. Umur pakai struktur conveyor 8 tahun dan sisa umur pakai berkisar antara 6,04 – 9,34 tahun. Dengan demikian terdapat 32% atau 8 test point yang diprediksi tidak mencapai umur desain yaitu 15 tahun.
Kajian Teknis dan Ekonimi Alat Gali-Muat dan Angkut pada Tambang Bijih Nikel di PT Mitra Tambang Gemilang di Kecamatan Pagimana Kabupaten Banggai Provinsi Sulawesi Tengah Moh. Ilham Akbar; Zaenal; Elfida Moralista
Bandung Conference Series: Mining Engineering Vol. 3 No. 2 (2023): Bandung Conference Series: Mining Engineering
Publisher : UNISBA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/bcsme.v3i2.8383

Abstract

Abstract. PT Mitra Tambang Gemilang was established in 2018, a company engaged as a mining contractor working on extracting minerals, especially nickel. The mining system used is an open pit mining system using the Selective Mining method. The mining operation area is in Central Sulawesi, in Luwuk Banggai to be precise. In pit 1, PT Mitra Tambang Gemilang has a production target of 600,000 BCM/year and based on mining results, the production of the Sany PC 215 C excavator loading and digging equipment is 586,455.12 BCM/year and the production of the Shacman F2000 dump truck is 581,644.08 BCM/year. year, this research was carried out with the aim of knowing the comparison of production values, comparison of ownership costs and operating costs, comparison of Present Worth Cost (PWC) and Production Unit Cost (PUC) comparisons between old and new digging and loading equipment.The company plans to replace the mechanical equipment with technical and economic assessments. Technical studies include calculating the production value of each tool and for economic studies including ownership costs, operating costs, Present Worth Cost (PWC) and Production Unit Cost (PUC) values. After knowing these values, a comparison is made between the production value and PUC of the old and new equipment so that it can be seen whether the old or new equipment is more profitable. Based on the results of technical and economic studies, the production of new loading and digging equipment was 773,139.06 BCM/year and showed a production increase of 31.83%. The production of new conveyance equipment is 769,994.96 BCM/year with an increase of 32.37%, indicating that the production target has been achieved. Production Unit Cost decreased by 44.96% for digging equipment, from Rp. 3,144.75 / BCM to Rp. 2,169.36 / BCM, while the Production Unit Cost of transportation equipment decreased by 26.28% from IDR 1,862.27 / BCM to IDR 1,469.96 /BCM. These results indicate that the tool needs to be replaced because the production of new tools is greater and the operating costs are more economical than the old tools. Abstrak. PT Mitra Tambang Gemilang berdiri pada tahun 2018, perusahaan yang bergerak sebagai kontraktor pertambangan yang bekerja pada penggalian mineral terutama nikel. Sistem penambangan yang digunakan yaitu Sistem Tambang Terbuka dengan menggunakan Metode Selective Mining. Wilayah operasi penambangan berada di Sulawesi Tengah, tepatnya di Luwuk Banggai. Pada Pit 1 PT Mitra Tambang Gemilang memiliki target produksi sebesar 600.000 BCM/tahun dan berdasarkan hasil penambangan produksi alat gali-muat Excavator Sany PC 215 C adalah 586.455,12 BCM/tahun dan produksi alat angkut Dump Truck Shacman F2000 adalah 581.644,08 BCM/tahun, maka dilakukan penelitian ini yang bertujuan untuk mengetahui perbandingan nilai produksi, perbandingan biaya kepemilikan dan biaya operasi, perbandingan nilai Present Worth Cost (PWC) dan perbandingan Production Unit Cost (PUC) antara alat gali-muat dan alat angkut yang lama dan baru. Perusahaan merencanakan penggantian alat mekanis yang dilakukan dengan pengkajian secara teknis dan ekonomi. Kajian teknis meliputi perhitungan nilai produksi masing-masing alat dan untuk kajian ekonomi meliputi biaya kepemilikan, biaya operasi, Present Worth Cost (PWC) dan nilai Production Unit Cost (PUC). Setelah mengetahui nilai-nilai tersebut, maka dilakukan perbandingan antara produksi dan PUC alat lama dan alat baru, sehingga dapat diketahui apakah alat lama atau alat baru yang lebih menguntungkan. Berdasarkan hasil kajian teknis dan ekonomi, produksi alat gali-muat baru sebesar 773.139,06 BCM/tahun dan menunjukan kenaikan produksi sebesar 31,83%. Untuk produksi alat angkut baru sebesar 769.994.96 BCM/tahun dengan kenaikan sebesar 32,37% menunjukan target produksi tercapai. Production Unit Cost (PWC) mengalami penurunan sebesar 44,96% untuk alat gali-muat, dari sebesar Rp. 3.144,75 /BCM menjadi Rp. 2.169,36 /BCM, sementara Production Unit Cost (PWC) alat angkut mengalami penurunan sebesar 26,28% dari Rp 1.862,27 /BCM menjadi Rp 1.469,96 /BCM. Hasil tersebut menunjukan alat perlu diganti karena produksi alat baru lebih besar dan biaya operasi lebih hemat dibandingkan alat lama.
Remaining Service Life Struktur Conveyor J pada Tambang Batubara PT GHI di Kabupaten Tapin Provinsi Kalimantan Selatan Ajeng Agustina Natahsia; Elfida Moralista; Zaenal
Bandung Conference Series: Mining Engineering Vol. 3 No. 2 (2023): Bandung Conference Series: Mining Engineering
Publisher : UNISBA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/bcsme.v3i2.8590

Abstract

Abstract. Conveyor is one of the means of transportation used in the mining industry, both to move excavated material processing and mining activities. The Conveyor structure is made of carbon steel material with strong structural characteristics and is susceptible to corrosion to oxidation due to environmental factors. With the occurrence of corrosion, it can cause damage and reduce the Remaining Service Life of the Conveyor structure. This study was conducted to determine Remaining Service Life, Corrosion Rate, type of corrosion and corrosion control on Conveyor structures. This study uses methodology measurement of thickness reduction of Conveyor structure. The actual thickness measurement on the Conveyor structure has a length of 94 meters divided into 3 segments with 25 test points above ground level. The tool used in measuring the thickness of the Conveyor structure is Ultrasonic Thickness Gauge TT 130.The type of corrosion that occurs in this Conveyor structure is evenly distributed corrosion. The method used for corrosion control is the Coating method with a three-layer system using Primer Coating Seaguard 5000, Intermediate Coating Sherglas FF and Top Coating Aliphatic Acrylic Modified Polyurethane. The value of Corrosion Rate that occurs in Conveyor structures ranges from 0.1814 – 0.3042 mm/year including the “good” category based on the relative corrosion resistance of steel. As for the design life of the Conveyor structure, which is 15 years and the remaining service life is 7 years, based on the calculation results obtained from the Remaining Service Life value it ranges from 6.71 – 9.65 years. Thus, 9 out of 25 test points or 36% were predicted to be unable to reach the predetermined design life of 15 years. Abstrak. Conveyor merupakan salah satu alat angkut yang digunakan dalam industri pertambangan, baik untuk memindahkan material pengolahan bahan galian maupun aktivitas penambangan. Struktur Conveyor terbuat dari material baja karbon dengan karakteristik struktur yang kuat serta rentan mengalami korosi terhadap oksidasi akibat dari faktor lingkungannya. Dengan terjadinya korosi maka dapat mengakibatkan kerusakan serta mengurangi Remaining Service Life pada struktur Conveyor. Penelitian ini dilakukan untuk mengetahui Remaining Service Life, Corrosion Rate, jenis korosi dan pengendalian korosi pada struktur Conveyor. Pada penelitian ini menggunakan metodologi pengukuran pengurangan ketebalan struktur Conveyor. Pengukuran tebal aktual pada struktur Conveyor memiliki panjang 94 meter yang dibagi menjadi 3 segmen dengan 25 test point yang berada di atas permukaan tanah. Alat yang digunakan dalam pengukuran ketebalan struktur Conveyor yaitu Ultrasonic Thickness Gauge TT 130. Jenis korosi yang terjadi pada struktur Conveyor ini ialah korosi merata. Metode yang digunakan untuk pengendalian korosi ialah metode Coating dengan sistem three layer menggunakan Primer Coating Seaguard 5000, Intermediate Coating Sherglas FF dan Top Coating Aliphatic Acrylic Modified Polyurethane. Nilai Corrosion Rate yang terjadi pada struktur Conveyor berkisar antara 0,1814 – 0,3042 mm/tahun termasuk kategori “good”dengan berdasarkan ketahanan korosi relatif baja. Sedangkan untuk umur desain dari struktur Conveyor yaitu 15 tahun dan umur sisa pakai 7 tahun, berdasarkan dari hasil perhitungan yang diperoleh dari nilai Remaining Service Life itu berkisar 6,71 – 9,65 tahun. Dengan demikian di dapatkan hasil sebanyak 9 dari 25 test point atau 36% yang diprediksi tidak dapat mencapai umur desainnya yang telah ditentukan yaitu 15 tahun.
Monitoring Korosi Discharge Conveyor F pada Tambang Batubara PT XYZ di Kabupaten Merangin Provinsi Jambi Muhammad Rizky Picauly; Elfida Moralista; Zaenal
Bandung Conference Series: Mining Engineering Vol. 3 No. 2 (2023): Bandung Conference Series: Mining Engineering
Publisher : UNISBA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/bcsme.v3i2.8629

Abstract

Abstract. Conveyors are the most widely used means of transporting raw materials in the mining industry, which are used to move excavated materials from the previous location to the next location, such as a stockpile. The conveyor structure used is made of carbon steel which is susceptible to corrosion. This research was conducted on the structure conveyor along 114 meters divided into 3 segments with 25 test points. This study aims to determine the type of corrosion, corrosion control, corrosion rate and the remaining life of the structure conveyor. The research was conducted on a 114 meter long conveyor structure which was divided into 3 segments and 25 test points, with a service life of 7 years and a design life of 15 years. The research methodology is the measurement of the thickness reduction of the conveyor structure. The actual thickness has a value ranging from 7.66-12.19mm measured with the Ultrasonic Thickness Gauge TT 130. Environmental data is in the form of rainfall data for 2015- 2019 with an average of 236.83 mm/year, average air temperature of 27.83°C and an average relative humidity of 85.60 %. The type of corrosion that occurs in the structure conveyor is uniform corrosion. The corrosion control method applied to the conveyor structure is the coating method with a primer coating Seaguard 5000, Intermediate coating Sherglass FF and top coating Aliphatic acrylic modified polyurethane. The corrosion rate of the structure conveyor ranges from 0.186-0.334 mm/year. Abstrak. Conveyor merupakan alat angkut raw material yang paling banyak dipakai di industri pertambangan yang digunakan untuk memindahkan material bahan galian dari tempat sebelumnya ke tempatnya selanjutnya seperti stockpile. Struktur conveyor yang digunakan adalah berbahan dasar baja karbon yang rentan terhadap korosi. Tujuan penelitian ini adalah untuk mengetahui jenis korosi, metode pengendalian korosi, laju korosi dan sisa umur pakai struktur conveyor. Penelitian dilakukan pada struktur conveyor sepanjang 114 meter yang dibagi menjadi 3 segmen dan 25 test point, dengan umur pakai 7 tahun dan umur desain 15 tahun. Metodologi penelitian adalah pengukuran pengurangan ketebalan struktur conveyor. Tebal aktual mempunyai nilai berkisar 7,66-12,19mm diukur dengan alat ukur Ultrasonic Thickness Gauge TT 130. Data lingkungan berupa data curah hujan tahun 2015-2019 dengan rata-rata 236,83 mm/tahun, suhu udara rata-rata 27,83 C dan kelembaban relatif rata-rata 85,60 %. Pada penelitian ini jenis korosi yang terjadi pada struktur conveyor yaitu korosi merata. Metode perlapisan ini menggunakan sistem 3 lapisan anti korosi yang terdiri dari lapisan primer Seaguard 5000, lapisan antara Sherglass FF dan lapisan atas Aliphatic acrylic modified polyurethane. Laju korosi struktur conveyor yaitu 0,186-0,334 mm/tahun.
Remaining Service Life Discharge Conveyor F pada Tambang Batubara PT XYZ di Kabupaten Banjar, Provinsi Kalimantan Selatan Rahma Azizah Kotta; Elfida Moralista; Noor Fauzi Isniarno
Bandung Conference Series: Mining Engineering Vol. 3 No. 2 (2023): Bandung Conference Series: Mining Engineering
Publisher : UNISBA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/bcsme.v3i2.8877

Abstract

Abstract. Conveyor is a means of conveyance used in the mining industry to move mining materials. The conveyor structure is made of steel which is prone to corrosion as a result of environmental influences which can cause a reduction in thickness and reduce the remaining life of the conveyor structure. This research was conducted to determine the type of corrosion, corrosion control method, corrosion rate, and the Remaining Service Life of the conveyor structure. The methodology used in this research is thickness reduction measurement. The conveyor structure has a length of 96 meters consisting of 3 segments with 25 test points. Measurements were made using a Smart Sensor Ultrasonic Thickness Gauge TT 130. The output obtained is the reduced thickness value which is used to determine the Corrosion Rate and Remaining Service Life. The environmental conditions of the study area in 2015-2020 had an average rainfall of 218.32 mm/year, an average relay humidity of 81.37% and an average temperature 25.92 0C. The type of corrosion that occurs in the conveyor structure is uniform corrosion. The corrosion control method used is the coating method with a three layers system. Coating method for primary coating using Seaguard 5000, Intermediate coating using Sherglass FF, and top coating using allphatic acrylic modified polyurethane. The corrosion rate of the conveyor structure ranges from 0.18 - 0.31 mm/year and based on the relative corrosion resistance of steel it is included in the good category. The service life of the conveyor structure is 7 years and the remaining service life ranges from 6.53 - 9.49 years, so there are 11 test points or 44% test points which are predicted not to reach the design life of 15 years. Abstrak. Conveyor merupakan alat angkut yang digunakan di industri pertambangan untuk memindahkan bahan tambang. Struktur conveyor terbuat dari baja yang rawan mengalami korosi sebagai akibat pengaruh lingkungannya yang dapat menyebabkan pengurangan ketebalan dan mengurangi sisa umur pakai struktur conveyor. Penelitian ini dilakukan untuk mengetahui jenis korosi, metode mengendalian korosi, laju korosi, dan Remaining Service Life struktur conveyor. Metodologi yang digunakan dalam penelitian ini adalah pengukuran pengurangan ketebalan. Struktur conveyor memiliki panjang 96 meter yang terdiri dari 3 segmen dengan 25 test point. Pengukuran dilakukan dengan menggunakan Smart Sensor Ultrasonic Thickness Gauge TT 130. Output yang di dapat adalah nilai pengurangan ketebalan yang digunakan untuk menentukan Laju Korosi dan Sisa Umur Pakai. Kondisi lingkungan daerah penelitian tahun 2015-2020 memiliki curah hujan rata-rata 218,32 mm/tahun, kelembapan relatif rata-rata 81,37% dan suhu rata-rata 25,920C. Jenis korosi yang terjadi pada struktur conveyor adalah korosi merata. Metode pengendalian korosi yang digunakan yaitu metode coating dengan sistem three layers. Metode coating untuk primer coating menggunakan Seaguard 5000, Intermediate coating menggunakan Sherglass FF, dan Top coating menggunakan Aliphatic Acrylic Modified Polyurethane. Laju korosi struktur conveyor berkisar antara 0,1842 - 0,310 mm/tahun dan berdasarkan ketahanan korosi relatif baja termasuk ke dalam kategori good. Umur pakai struktur conveyor yaitu 7 tahun dan sisa umur pakai berkisar 6,53 - 9,49 tahun, sehingga terdapat 11 test point atau 44% test point yang diprediksi tidak dapat mencapai umur desain yaitu 15 tahun.
Kajian Teknis Optimasi Produksi Alat Gali-Muat dan Angkut pada Overburden Removal Fakhri Akbar Dzulfikar; Zaenal; Elfida Moralista
Jurnal Riset Teknik Pertambangan Volume 3, No. 2, Desember 2023, Jurnal Riset Teknik Pertambangan (JRTP)
Publisher : UPT Publikasi Ilmiah Unisba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jrtp.v3i2.2879

Abstract

Abstract. PT Pancaran Surya Abadi is a coal mining company located in Muara Badak District, Kutai Kartanegara Regency, East Kalimantan Province, employing the surface mining system. Based on the company's productivity data in February 2023, the actual overburden excavation in Pit B1 East Block reached 80,946.00 BCM, accounting for 33.15% of the planned production target of 244,160.00 BCM. The discrepancy led to obstacles in coal production due to a mismatch between digging-loading and hauling equipment (match factor) and road geometry not meeting applicable standards. Consequently, this study evaluates the production shortfall by assessing the technical fleet determination to optimize the overburden removal process. The technical evaluation involves simulating the match factor and adjusting related variables to determine the optimal number of machines in the fleet. The analysis refers to Ministerial Decree ESDM 1827/2018 and AASHTO (American Association of State Highway and Transportation Officials) 1965 for technical road geometry recommendations supporting optimal fleet productivity. Field research in February-March 2023 yielded a match factor of 0.85 and a production rate of 164.03 BCM/hour, achieving 75.24% of the hourly production target. Optimization increased the match factor to 1.03, raising production to 230.91 BCM/hour or 258,622.18 BCM/month, ensuring the attainment of the 218 BCM/hour productive day shift target. Abstrak. PT Pancaran Surya Abadi merupakan perusahaan pertambangan batubara yang berlokasi di Kecamatan Muara Badak, Kabupaten Kutai Kartanegara, Provinsi Kalimantan Timur, dan menggunakan sistem penambangan terbuka. Berdasarkan data produktivitas perusahaan pada bulan Februari 2023, penggalian overburden aktual di Pit B1 Blok Timur mencapai 80.946,00 BCM, yang merupakan 33,15% dari target produksi rencana sebesar 244.160,00 BCM. Ketidaksesuaian ini menyebabkan hambatan dalam produksi batubara karena ketidakcocokan antara peralatan penggalian-pemuatan dan pengangkutan (match factor) serta geometri jalan yang tidak memenuhi standar yang berlaku. Oleh karena itu, penelitian ini mengevaluasi ketidakcapaian produksi dengan menilai penentuan armada teknis untuk mengoptimalkan proses pengangkatan overburden. Evaluasi teknis melibatkan simulasi match factor dan penyesuaian variabel terkait untuk menentukan jumlah optimal mesin dalam armada. Analisis mengacu pada Keputusan Menteri ESDM 1827/2018 dan AASHTO (American Association of State Highway and Transportation Officials) 1965 untuk rekomendasi geometri jalan teknis yang mendukung produktivitas armada yang optimal. Penelitian lapangan pada Februari-Maret 2023 menghasilkan match factor sebesar 0,85 dan produksi sebesar 164,03 BCM/jam, mencapai 75,24% dari target produksi per jam. Optimasi meningkatkan match factor menjadi 1,03, meningkatkan produksi menjadi 230,91 BCM/jam atau 258.622,18 BCM/bulan, memastikan pencapaian target produksi per jam pada shift kerja yang produktif sebesar 218 BCM/jam.
Kajian Pengaruh Geometri Jalan Terhadap Konsumsi Bahan Bakar Alat Angkut Dimas Gumelar; Zaenal; Elfida Moralista
Jurnal Riset Teknik Pertambangan Volume 4, No. 1, Juli 2024, Jurnal Riset Teknik Pertambangan (JRTP)
Publisher : UPT Publikasi Ilmiah Unisba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jrtp.v4i1.3817

Abstract

Abstract. PT XYZ Tbk is a company engaged in the mining industry with one of its commodities in the form of bauxite located in Sanggau Regency, West Kalimantan Province. In the actual conditions in the research area there are several road geometries that are not in accordance with the standards set so that the production target is not achieved. In this research process, the road geometry at Bukit 30 Site is focused on the standardization of the hauling road to the washing plant area. Analysis using the comparative method is carried out on road geometry that refers to the Decree of the Minister of Energy and Mineral Resources No. 1827 of 2018 and the American Association of State Highways and Transportation Officials Based on the actual research results, the actual productivity in the field of hauling equipment is 32.23 BCM / hour / tool with an average fuel consumption of 10.06 liters / hour and a Fuel Ratio of 0.31 liters / BCM. After simulating the road geometry improvement process using software, recommendations are obtained to increase tool productivity and reduce Fuel Ratio with road grade standardization of no more than 8%. Then obtained an increase in productivity of 69.4 BCM / hour / tool recommendations with the achievement of production of 126,469.04 tons / month with an average fuel consumption of 7.35 liters / hour and a Fuel Ratio of 0.1 liters / BCM. Abstrak. PT XYZ Tbk merupakan perusahaan yang bergerak di bidang usaha industri pertambangan dengan salah satu komoditasnya berupa bauksit yang berlokasi di Kabupaten Sanggau, Provinsi Kalimantan Barat. Pada kondisi aktual di daerah penelitian terdapat beberapa geometri jalan yang tidak sesuai dengan standar yang ditetapkan sehingga, target produksi tidak tercapai. Dalam proses penelitian ini dilakukan terhadap geometri jalan pada Site Bukit 30 yang berfokus pada standarisasi jalan hauling menuju area washing plant. Analisis menggunakan metode komperatif dilakukan terhadap geometri jalan yang mangacu pada Keputusan Menteri ESDM No. 1827 tahun 2018 dan American Association of State Highways and Transportation Officials Berdasarkan hasil penelitian secara aktual maka didapatkan produktivitas aktual di lapangan alat angkut 32,23 BCM/jam/alat dengan rata-rata konsumsi bahan bakar alat angkut 10,06 liter/jam dan Fuel Ratio sebesar 0,31 liter/BCM. Setelah melakukan proses simulasi perbaikan geometri jalan menggunakan perangkat lunak maka didapatkan rekomendasi untuk peningkatan produktivitas alat dan pengurangan Fuel Ratio dengan standarisasi grade jalan tidak lebih dari 8%. Maka didapatkan peningkatan produktivitas rekomendasi alat angkut 69,4 BCM/jam/alat dengan tercapainya produksi sebesar 126.469,04 ton/bulan dengan rata-rata konsumsi bahan bakar alat angkut 7,35 liter/jam dan Fuel Ratio sebesar 0,1 liter/BCM.
Pengaruh Geometri Jalan Terhadap Produktivitas Alat Angkut Rizky Noor Fitriadi; Iswandaru; Elfida Moralista
Jurnal Riset Teknik Pertambangan Volume 4, No. 1, Juli 2024, Jurnal Riset Teknik Pertambangan (JRTP)
Publisher : UPT Publikasi Ilmiah Unisba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jrtp.v4i1.3821

Abstract

Abstract. Based on the actual conditions in the field, there are several road geometries that are not in accordance with the standards resulting in high traffic density. This causes the actual productivity of the HD 785 conveyance at the KGU South front of 108.2 BCM / Hour / Tool to not reach the conveyance productivity target of 115.23 BCM / Hour / Tool. Therefore, it is necessary to conduct this research to increase the productivity of hauling equipment by improving road geometry. The research was conducted on road geometry focusing on the standardization of Jalan Pandawa. Analysis using the comparative method was carried out with reference to KEPMEN ESDM No. 1827 of 2018 and the American Association of State Highways and Transportation Officials (AASHTO) on road geometry, Rolling Resistance and traffic density, so as to achieve the planned hauling equipment productivity target.  Based on the research results, recommendations are obtained to achieve the HD 785 conveyance productivity target, namely by standardizing road geometry with a road grade of no more than 8%, Rolling Resistance of 2.11% with a subsidence state of 2.5 cm, and traffic density of no more than 80% of the maximum density of Jalan Pandawa with a total of 27 units in loaded conditions and 22 units in empty conditions. The productivity of the conveyance increased by 19.55% from 108.2 BCM/Hour/Tool to 129.36 BCM/Hour/Tool so that the productivity target of the conveyance was achieved. Abstrak. Berdasarkan pada kondisi aktual di lapangan terdapat beberapa geometri jalan yang tidak sesuai dengan standar sehingga terjadi traffic density yang tinggi. Hal tersebut menyebabkan produktivitas aktual alat angkut HD 785 di front KGU Selatan sebesar 108,2 BCM/Jam/Alat tidak mencapai target produktivitas alat angkut yaitu sebesar 115,23 BCM/Jam/Alat. Oleh sebab itu maka perlu dilakukan penelitian ini untuk meningkatkan produktivitas alat angkut dengan perbaikan geometri jalan. Penelitian dilakukan terhadap geometri jalan yang berfokus pada standarisasi Jalan Pandawa. Analisis menggunakan metode komparatif dilakukan dengan mengacu pada KEPMEN ESDM No. 1827 tahun 2018 dan American Association of State Highways and Transportation Officials (AASHTO) terhadap geometri jalan, Rolling Resistance serta traffic density, sehingga tercapai target produktivitas alat angkut yang sudah direncanakan.  Berdasarkan hasil penelitian didapatkan rekomendasi untuk mencapai target produktivitas alat angkut HD 785 yaitu dengan melakukan standarisasi geometri jalan dengan grade jalan tidak lebih dari 8%, Rolling Resistance sebesar 2,11% dengan keadaan subsidensi 2,5 cm, serta traffic density tidak lebih dari 80% dari maksimum density Jalan Pandawa dengan total 27 unit pada kondisi muatan serta 22 unit pada kondisi kosongan. Produktivitas alat angkut meningkat 19,55% dari 108,2 BCM/Jam/Alat sampai ke 129,36 BCM/Jam/Alat sehingga target produktivitas alat angkut tercapai.
Perencanaan dan Pentahapan Penambangan Nikel PT. Hillconjaya Sakti Site Indrabakti Mustika Andi Maulana Yusuf; Yuliadi; Elfida Moralista
Jurnal Riset Teknik Pertambangan Volume 4, No. 2, Desember 2024, Jurnal Riset Teknik Pertambangan (JRTP)
Publisher : UPT Publikasi Ilmiah Unisba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jrtp.v4i2.5215

Abstract

Abstrak. PT Hillconjaya Sakti operates a 512-hectare nickel mining area with a 2024 production target of 2,500,000 tons/year, an increase from 1,800,000 tons/year in 2023, necessitating updates in production planning and phase scheduling. Mining designs for the Longori, Silae, and Kolaka blocks follow Indonesian regulations and use Cut of Grade values: Lot 1 Ni 1.45, Lot 2 Ni 1.30, and Lot 3 Ni 1.25. Equipment availability is 86% with 54% utilization, achieving ore extraction efficiency of 71.1% and overburden removal efficiency of 74%. Excavator productivity reaches 240.26 tons/hour for ore and 275.98 BCM/hour for overburden, while dump trucks achieve 29.1 tons/hour and 55.17 BCM/hour, respectively. Reserves are estimated at 2,520,387 tons, adjusted to 2,515,753 tons with a stripping ratio of 1.44, and the 2024 disposal capacity is set at 3,618,793 BCM, supporting the company’s scaling and operational efficiency goals. Abstract. PT Hillconjaya Sakti is a nickel mining company with a 512 ha IUP area, aiming for a 2024 production target of 2,500,000 Tons/Year, up from 1,800,000 Tons/Year in 2023. This increase will impact the production plan and mine sequencing for 2024. The research aims to determine the production target, equipment productivity, reserve estimates based on the mine opening design, and mine sequencing plans.The mining designs were created in accordance with Indonesian mining regulations, including the Law No. 3 of 2020 and Ministerial Decree No. 1827 of 2018. The designs cover three mining blocks: Longori, Silae, and Kolaka, with classifications based on the company’s Cut of Grade values (Ni 1.45, Ni 1.30, and Ni 1.25). Mechanical equipment availability is 86%, with a 54% usage rate. The working efficiency for ore extraction is 71.1%, and for overburden removal, it's 74%. Productivity for ore extraction is 240.26 Tons/Hour for Backhoe and 29.1 Tons/Hour for Dump Truck. For overburden removal, productivity is 275.98 BCM/Hour for Backhoe and 55.17 BCM/Hour for Dump Truck. The estimated reserves based on the pit design are 2,520,387 tons. After completing the mine disposal plan, the reserves are reduced to 2,515,753 tons, with a stripping ratio of 1.44. The disposal capacity for 2024 is estimated at 3,618,793 BCM.
Increasing Added Value in Basalt Rocks for Making Basalt Fiber Yuliadi; Zaenal; Moralista, Elfida; Prabowo, Jerry Dwifajar; Noufal Abhinaya
ETHOS: Jurnal Penelitian dan Pengabdian kepada Masyarakat Vol. 12 No. 1 (2024): (Januari, 2024) Ethos: Jurnal Penelitian Dan Pengabdian Kepada Masyarakat (Sai
Publisher : UPT Publikasi Ilmiah UNISBA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/ethos.v12i1.2903

Abstract

Andesite and basalt are generally mined materials used only for building (construction). To increase the added value, basalt rock is currently starting to be widely used as a construction material that is converted into composites with fiber reinforcement. In this initial research, the aim is to examine the characteristics of basalt rock at three locations in the Greater Bandung area (Gunung Bohong, Cipatik, and Batu Templek), including its chemical composition, physical and mechanical properties, and mineral composition. The research methodology is carried out on three rock characteristics that can be used as basalt fiber, namely the XRF method to determine chemical composition (Al2O3 and SiO2), physical and mechanical testing, as well as the petrographic analysis method to discover mineral composition by examining the presence of Plagioclase minerals. The results of the chemical analysis of all samples are suitable, but there are chemical compounds that do not match the parameters, namely Fe2O3 + FeO and MgO. Samples from Cipatik and Batu Templek are suitable. The physical properties test is also suitable. For mechanical property testing, only samples from Gunung Bohong and Cipatik are suitable. Petrographic tests conclude that the three rock samples fit into the basaltic andesite rock category.
Co-Authors Adinda Pratiwi Fitrianingsih Afriyani Ahmad Iman Athalah Purnawarman Ahmad Syarifudin Ajeng Agustina Natahsia Andi Maulana Yusuf Anggi Maulana Ardiansyah Aristu Eka Adrian Arrmandha Alghifari Dimas Gumelar Duane Tika Maharani Dwi Yuda Meliady Kusuma Dwiki Zulkifly Ardiansa Eldera Rizki Nuraini Elviya Yeni Fajar Arifianto Fakhri Akbar Dzulfikar Holyness Nurdin Singadimedja Ikbal Amru Indra Karna Wijaksana Iswandaru Jossie Indra Saputra La Ode Arlin Lesmana Eka Fadhilah Maya Almaniar Zulhi Wibiyana Mochammad Faizal Fadhillah Moh. Ilham Akbar Muhamad Rizal Kautsar Muhammad Arib Nazhir Muhammad Fedryana Muhammad Fu'ad Muhammad Ikbal Muhammad Rizky Picauly Mutiara Nur Fajryanti Nabilla Amellia Putri Nirmaya Wulandari Noor Fauzi Isniarno Noufal Abhinaya Nurul Azizah Nuur Isniarno Padli Ahmad Wijaya Kusuma Prabowo, Jerry Dwifajar Rafid Rabbani Rahma Azizah Kotta Rahmat Fauzi Reka Juliantika Rihhadatul Aisyi Alfafa Rizal Andriansyah Rizkal Zubair Rizky Ade Pradana Rizky Noor Fitriadi Roby Ardianta Sandy Renaldi Soultan Taufiq Sriyanti Sulthan Aditya Pratama Gunawan Syifa Kharenina Vaisal Gilang Adrian Yodi Kurniawan Yuliadi Yuliadi Yuliadi Zaenal Zaenal Zaenal Zaenal Zaenal