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All Journal Jurnal Riset Teknik Pertambangan Bandung Conference Series: Mining Engineering ETHOS: Jurnal Penelitian dan Pengabdian kepada Masyarakat
Noor Fauzi Isniarno
Program Studi Teknik Pertambangan, 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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Journal : Bandung Conference Series: Mining Engineering

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Rencana Teknis dan Biaya Reklamasi Tambang Batubara di PT Bhadra Pinggala Sejahtera Kecamatan Tabang Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur Muhammad Mulya Prasetya; Noor Fauzi Isniarno; Solihin
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.v3i2.8684

Abstract

Abstract. Coal mining in Indonesia is generally carried out with an open pit mining system so that it has an impact on environmental damage. The government requires holders of mining business permits to repair land disturbed by mining activities. The government has issued a clear policy regarding reclamation, namely PP No. 78 of 2010 concerning "Reclamation and Post-mining" and Ministry of Energy and Mineral Resources Regulation No. 7 of 2014 concerning "Implementation of Reclamation and Postmining in Mineral and Coal Mining Business Activities". Studies regarding technical plans and reclamation costs need to be carried out so that reclamation can run optimally. In this research, a study on reclamation planning and reclamation cost calculation was carried out on former Pit C mining with a total area of 131,67 Ha during 2023 to 2027. Technical planning includes studies on land use management, revegetation and maintenance. Calculation of reclamation costs includes the calculation of direct costs and indirect costs, direct costs include land use planning costs, revegetation costs, and maintenance costs while indirect costs include equipment mobilization costs (2.5%), reclamation planning costs (6.5-6 .8%), and supervision costs (4.3-4.9%). Based on the calculations, the direct cost of the reclamation plan for the ex-mining area of Pit C from 2023-2027 is IDR 75.311.443.648 with an indirect cost of IDR 7.042.627.235. The total cost of the planned reclamation activities is IDR 82.354.070.883. Abstrak. Tambang batubara di Indonesia umumnya dilakukan dengan sistem tambang terbuka (open pit mining) sehingga berdampak terhadap kerusakan lingkungan. Pemerintah mewajibkan pemegang izin usaha pertambangan untuk melakukan perbaikan terhadap lahan terganggu akibat dari aktivitas penambangan. Pemerintah telah mengeluarkan kebijakan yang jelas terkait reklamasi yaitu PP No.78 Tahun 2010 tentang “Reklamasi dan Pascatambang” dan Permen ESDM No. 7 Tahun 2014 tentang “Pelaksanaan Reklamasi Dan Pascatambang Pada Kegiatan Usaha Pertambangan Mineral Dan Batubara”. Kajian mengenai rencana teknis dan biaya reklamasi perlu dilakukan agar pelaksanaan reklamasi dapat berjalan secara optimal. Pada penelitian ini dilakukan kajian perencanaan reklamasi dan perhitungan biaya reklamasi pada bekas penambangan Pit C dengan luas total 131,67 Ha selama tahun 2023 hingga 2027. Perencanaan teknis meliputi kajian penata gunaan lahan, revegetasi, dan pemeliharaan. Perhitungan biaya reklamasi meliputi perhitungan biaya langsung dan biaya tidak langsung, biaya langsung mencakup biaya penata gunaan lahan, biaya revegetasi, dan biaya pemeliharaan sedangkan biaya tidak langsung meliputi biaya mobilisasi alat (2,5%), biaya perencanaan reklamasi (6,5-6,8%), dan biaya supervisi (4,3-4,9%). Berdasarkan perhitungan didapatkan biaya langsung rencana reklamasi untuk area bekas penambangan Pit C dari tahun 2023-2027 yaitu sebesar Rp 75.311.443.648 dengan biaya tidak langsung sebesar Rp 7.042.627.235. Sehingga total biaya dari rencana kegiatan reklamasi sebesar Rp 82.354.070.883.
Kajian Teknis dan Ekonomis Pemberaian Overburden dengan Metode Ripping pada Tambang Batubara PT Duta Tambang Rekayasa Kecamatan Seimenggaris, Kabupaten Nunukan, Provinsi Kalimantan Utara Ayu Ramadhina; Zaenal; 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.v3i2.8740

Abstract

Abstract. PT Duta Tambang Rekayasa is a company engaged in coal mining with an IUP of 1,700 Ha. Has a Stripping Ratio (SR) of 12 BCM OB/Ton BB with a coal production target of 50,000 tons per month and an Overburden (OB) stripping target of 600,000 BCM per month. OB stripping based on Rippability in that area is included in the category of using the Ripping Method. The actual results of Ripping production are not yet known, so it is necessary to study both from a technical and economic point of view. The technical review consists of calculating the achievement of productiontargets by analyzing the production of Ripping and digging activities and the need for tools. The study from an economic perspective is the calculation of the estimated cost of the equipment. Data that needs to be analyzed is the production of Bulldozers and Backhoes, economic data in the form of equipment ownership, and operating costs. The study used three tools and observed, namely the Komatsu D375A Bulldozer, the Liebherr 756 Bulldozer, and the Hitachi 870 LCH 8G Backhoe. Based on the research results, it can be analyzed regarding the average Ripping production using the Komatsu D375A Bulldozer of 1440.74 BCM/hour/tool, with a production target of 300,000 BCM/month/tool. This tool has been (fulfilled) with a production yield of 393,782.33 BCM/month/ tools, for the estimated Ripping costs incurred Rp. 2,286.61,- BCM/hour. While the average Ripping production using the Liebherr 756 Bulldozer is 894.52 BCM/hour/tool. Production of the Liebherr 756 Bulldozer (not fulfilled) with a yield of 200,837.45 BCM/month/tool is suggested to add to 2 units of equipment, with an estimated Ripping cost of Rp. 2550.33,- BCM/hour. Hitachi ZX870LCH-5G Backhoe loading and unloading equipment production (not yet fulfilled) with a production output of 130,049.83 BCM/month/tool is suggested to add to 5 units of equipment, with an estimated digging-loading cost of Rp.3,638.32,- BCM/hour. Abstrak. PT Duta Tambang Rekayasa merupakan perusahaan yang bergerak di bidang pertambangan batubara dengan IUP seluas 1.700 Ha. Memiliki StRipping Ratio (SR) 12 BCM OB/Ton BB dengan target produksi batubara sebesar 50.000 ton per bulan dan target pengupasan Overburden (OB) sebesar 600.000 BCM per bulan. Pengupasan OB berdasarkan Kemampugaruan (Rippability) pada daerah tersebut termasuk kategori menggunakan Metode Ripping. Belum diketahui secara aktual hasil produksi Ripping maka perlu dilakukan kajian baik dari segi teknis dan ekonomis. Kajian teknis terdiri dari perhitungan pencapaian target produksi dengan analisis produksi aktivitas Ripping dan aktivitas gali-muat dan kebutuhan alat. Kajian dari segi ekonomis yaitu perhitungan estimasi biaya alat. Data yang perlu di analisis berupa produksi Bulldozer dan Backhoe, data ekonomi berupa biaya kepemilikan dan biaya operasi alat. Penelitian menggunakan tiga alat dan yang diamati, yaitu Bulldozer Komatsu D375A, Bulldozer Liebherr 756 dan Backhoe Hitachi 870 LCH 8G. Berdasarkan hasil penelitian dapat dianalisis mengenai produksi rata-rata Ripping menggunakan Bulldozer Komatsu D375A sebanyak 1440,74 BCM/jam/alat, dengan target produksi 300.000 BCM/bulan/alat alat ini sudah (terpenuhi) dengan hasil produksi 393.782,33 BCM/bulan/alat, untuk estimasi biaya Ripping yang dikeluarkan sebesar Rp. 2.286,61,- BCM/jam. Sementara produksi rata-rata Ripping menggunakan Bulldozer Liebherr 756 sebanyak 894,52 BCM/jam/alat. Produksi Bulldozer Liebherr 756 (belum terpenuhi) dengan hasil 200.837,45 BCM/bulan/alat disarankan menambah menjadi 2 unit alat, dengan estimasi biaya Ripping yang dikeluarkan sebesar Rp. 2.550,33,- BCM/jam. Hasil produksi alat gali-muat Backhoe Hitachi ZX870LCH-5G (belum terpenuhi) dengan hasil produksi 130.049,83 BCM/bulan/alat disarankan menambah menjadi 5 unit alat, dengan estimasi biaya gali-muat sebesar Rp.3.638,32,- BCM/jam.
Pemodelan dan Estimasi Sumberdaya Nikel Laterit Berdasarkan Kandungan Ni dan Fe dengan Menggunakan Metode Kriging di PT Putra Perkasa Abadi, Kecamatan Langgikima, Kabupaten Konawe Utara, Provinsi Sulawesi Tenggara Muhamad Rizaldi Fadlilah; Noor Fauzi Isniarno; Dono Guntoro
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.v3i2.8834

Abstract

Abstract. Nickel laterite is a metallic mineral resulting from the chemical weathering process of ultramafic rocks which results in residual and secondary enrichment of Ni, Fe, Mn, and Co elements (Syafrizal et al.,2011). With the cut-off grade Ni, modeling and estimation of resources is important to obtain a block model of Ni resources. The distribution of Ni levels is heterogeneous, so mining is carried out by selective mining referring to model blocks that have been mapped to meet the cut-off grade Ni. Based on this, it is possible for low and high Ni levels to be optimized, because if you only take Ni levels above 1.6%, Ni levels below the cut-off grade are not utilized. The resource estimation method used is kriging. Because kriging is the best linear unbiased estimator, many parameters are considered in kriging one of which is the variogram model. The variogram model is a geostatistical analysis by considering the location of the sample point, so that information on the relationship of one point with another point is expressed in the range/radius of information points that still have a spatial relationship. Based on statistical analysis, Block North and Block South data distribution are abnormal, with coefficient of variation values of 0.494 and 0.410. Resources that meet the cut-off grade Ni for blending needs are obtained low nickel, medium and high grade ore nickel. The total laterite nickel resources of the North Block amounted to 36,757 tons with an average Ni content of 1.64%, the total laterite nickel resources of the South Block amounted to 178,186 tons with an average Ni content of 1.62%. When viewed from the average rate per block, both blocks meet the cut-off grade Ni. Abstrak. Nikel laterit merupakan mineral logam hasil proses pelapukan kimia batuan ultramafik yang mengakibatkan pengkayaan unsur Ni, Fe, Mn, dan Co secara residual dan sekunder (Syafrizal et al., 2011). Dengan adanya cut-off grade Ni, maka pemodelan dan estimasi sumberdaya penting dilakukan untuk mendapatkan model blok sumberdaya Ni. Distribusi kadar Ni yang heterogen, maka penambangan dilakukan secara selective mining mengacu pada blok model yang sudah dipetakan untuk memenuhi cut-off grade Ni. Berdasarkan hal tersebut, memungkinkan adanya kadar Ni rendah dan tinggi yang harus di-optimalkan, karena jika hanya mengambil kadar Ni diatas 1.6%, kadar Ni di bawah cut-off grade tidak termanfaatkan. Metode estimasi sumberdaya yang digunakan adalah kriging. Pemilihan metode kriging dikarenakan kriging merupakan best linear unbiased estimator, banyak parameter yang diperhatikan dalam kriging salah satunya adalah model variogram. Model variogram merupakan analisis geostatistik dengan mempertimbangkan lokasi titik sampel, sehingga didapatkan informasi hubungan satu titik dengan titik yang lainnya dinyatakan dalam range/radius titik informasi yang masih memiliki hubungan secara spasial. Berdasarkan analisis statistik, Blok North dan Blok South distribusi datanya tidak normal, dengan nilai koefisien variasi 0.494 dan 0.410. Sumberdaya yang memenuhi cut-off grade Ni untuk kebutuhan blending didapatkan low nickel, medium dan high grade ore nickel. Total sumberdaya nikel laterit Blok North sebesar 36,757 ton dengan kadar Ni rata-rata 1.64%, total sumberdaya nikel laterit Blok South sebesar 178,186 ton dengan kadar Ni rata-rata 1.62%. Jika dilihat dari kadar rata-rata per-Blok, kedua Blok memenuhi cut-off grade Ni.
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.
Interpretasi Tahanan Jenis Dua Dimensi Konfigurasi Wenner untuk Menentukan Struktur Bawah Permukaan di Kota Samarinda Provinsi Kalimantan Timur Fadlan Al Anshar; Noor Fauzi Isniarno; Dudi Nasrudi Usman
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.v3i2.9044

Abstract

Abstract. Judging from the regional geological map on the Samarinda sheet, it was found that in the study area there was a very complex structure. Geolistics is a method that can analyze subsurface structures with resistivity values. To identify subsurface conditions, it is necessary to model the results of measurements to strengthen interpretation with geological maps. Geoelectrical measurements were carried out using a 2-dimensional Wenner configuration NeoResist tool with the same distance between electrodes, which will produce an apparent resistivity value, resistivity resulting from software processing, and an apparent resistivity cross-section. Measurements were carried out in four tracks on fairly steep topographical conditions with a spacing of 10 meters between electrodes and a stretch of 400 meters. Acquisition and interpretation of measurement results obtained the lithology of minerals, including sandstone and claystone, and encountered geological structures in geoelectrical measurements. The results of the measurements obtained an indication of the structure on tracks 1, 3, and 4 and an anomaly in the resistivity value because there is a resistivity value that decreases and forms like a structure. On the cross section of track 1, there is a change in resistivity that is indicated to be affected by a rising fault in the western part of the geological map; on track 3, it is found that there is a resistivity filling like a fracture; on track 4, it gets resistivity like a fracture that is almost upright; and it is indicated that in that area, the change results from the influence of trajectory 1. This indication is strengthened by the location of the research area, which is surrounded by a complex structure. Abstrak. Ditinjau dari peta geologi regional pada lembar samarinda dijumpai bahwa pada daerah penelitian terdapat adanya struktur yang sangat komplek. Geolistik salah satu metode yang dapat menganalisis strukur bawah permukaan dengan nilai resisitivity. Untuk mengidentifikasi kondisi bawah permukaan di perlukan pemodelan hasil dari pengukuran untuk memperkuat interptretasi dengan peta geologi. Pengukuran geolistrik dilakukan menggunakan alat NeoResist konfigurasi wenner 2 dimensi dengan jarak antar elektroda yang sama akan menghasilkan nilai tahanan jenis semu, tahanan jenis hasil dari pengolahan software, Penampang apparent resistivity. Pengukuran dilakukan sebanyak 4 lintasan pada kondisi topografi yang cukup curam dengan jarak antar elektroda 10 meter dan bentangan sepanjang 400 meter. Akuisisi dan interpretasi data hasil pengukuran didapatkan litologi bahan galian diantaranya adalah batupasir dan batulempung, serta di jumpai adanya struktur geologi dalam pengukuran geolistrik. Hasil dari pengukuran didapatkan adanya indikasi struktur pada lintasan 1, 3 dan 4 dan didapatkan anomali pada nilai resistivity di karenakan terdapat nilai resistivity yang menunjam serta membentuk seperti struktur. Pada penampang lintasan 1 terdapat adanya perubahan resistivity yang diindikasikan terdampak oleh sesar naik pada bagian barat pada peta geologi, pada lintasan 3 didapatkan adanya resistivity yang mengisi seperti rekahan, pada lintasan 4 di dapatkan resistivity seperti rekahan yang hampir tegak dan diindikasikan bahwa pada daerah tersebut hasil dari pengaruh lintasan 1. Indikasi tersebut perkuat dengan lokasi daerah penelitian di kelilingi dengan struktur yang kompleks.
Co-Authors A. Sulhan Dwi Wahyullah Ahmad Heriansyah Alfarel, Muhammad Reyhand Alifia Atsiila Fitri Anggi Maulana Arif Mangkusagara Ashari Aries Ayu Ramadhina Bagea Bagja Gumelar Deden Manzil Franandy Dono Guntoro Dono Guntoro Dudi Nasrudi Usman Dudi Nasrudin Usman Dwi Yuda Meliady Kusuma Elfida Moralista Fadlan Al Anshar Fauzan Akbar Ramadhan Ilham Adi Prassetia Ilham Rifki Nurfajar Iswandaru Jivan Akbar La Ode Arlin Linda Pulungan Maulana Okta Saputra Mohammad Rizkie Syahreza Muhamad Awaludin Muhamad Kaisya Hidayat Muhamad Rizaldi Fadlilah Muhammad Afif Zahrandika Muhammad Faiq Syahdan Banama Muhammad Fawwaz Mursyid Muhammad Fedryana Muhammad Fu'ad Muhammad Ikbal Muhammad Ikmal Hikmatullah Muhammad Ilham Naufal Muhammad Mulya Prasetya Muhammad Reyhand Alfarrel Muhammad Rizky Amendra Muhammad Yusup Mulyadi, Tommy Rahma Azizah Kotta Rama Aditya Rijal Aditya Prasetya Rismul Rasyad Rasyad Rizki Purnama Sandy Renaldi Solihin Taufiq Maulana Akbar Tifana Amalya Vaisal Gilang Adrian Vicky Kurnia Nugraha Viona Nathasya Gunawan Wahyu Budi khorniawan Wahyu Budi Khorniawan Widya Mastari Yuliadi Yuliadi Yunus Ashari Zaenal Zaenal Zaenal Zaenal Zaenal Zaenal Zaenal Zharfan Ghana