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All Journal Jurnal Sains dan Pendidikan Fisika Media Komunikasi Geografi Seminar Nasional Teknik Kimia Kejuangan Journal of Engineering and Technological Sciences Jurnal Teknologi Pertambangan Techno LPPM JOURNAL ONLINE OF PHYSICS Jurnal Teknologi Mineral dan Batubara Jurnal Geomine RACIC : Rab Construction Research Indonesian Mining Journal Justek : Jurnal Sains Dan Teknologi Jurnal Mineral, Energi dan Lingkungan Prosiding Seminar Nasional Sains dan Teknologi Terapan Jurnal GEOSAPTA Jurnal Basicedu Jurnal Tekno Insentif Media Ilmiah Teknik Lingkungan Jurnal Teknik ComTech: Computer, Mathematics and Engineering Applications KURVATEK INDONESIAN MINING PROFESSIONALS JOURNAL Jurnal Himasapta Jurnal Mineral, Energi dan Lingkungan Prosiding Seminar Teknologi Kebumian dan Kelautan (SEMITAN Journal of Earth and Marine Technology (JEMT) Euler : Jurnal Ilmiah Matematika, Sains dan Teknologi Jurnal Sosial dan Teknologi Jurnal Inovasi Pertambangan dan Lingkungan Jurnal Basicedu INTAN Jurnal Penelitian Tambang Indonesian Mining and Energy Journal Jurnal Riset Rumpun Ilmu Teknik (JURRITEK) Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII Prosiding Seminar Nasional Teknik Lingkungan Kebumian SATUBUMI Jurnal Anestesi: Jurnal Ilmu Kesehatan dan Kedokteran Jurnal Teknologi Mineral dan Batubara Indonesian Mining Journal
Cahyadi, Tedy Agung
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Aerospace Engineering Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Physics Public Health Social Sciences Transportation

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Peramalan Harga Nikel Berbasis Machine Learning menggunakan Algoritma Gated Recurrent Unit (GRU) Erlangga, Robby; Ardian, Aldin; Suharyadi, Heru; Kodong, Frans Richard; Cahyadi, Tedy Agung
Jurnal Teknologi Pertambangan Vol. 11 No. 2 (2026): Januari 2026
Publisher : Universitas Pembangunan Nasional Veteran Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jtp.v11i2.16120

Abstract

Nikel merupakan komoditas tambang yang penting dalam pembuatan baterai kendaraan listrik (electric Vehicle (EV)). Meningkatnya produksi EV dalam upaya mengurangi emisi karbon menyebabkan tingginya kebutuhan Nikel sebagai bahan baku baterai kendaraan listrik diprediksi akan meningkat. Seiring meningkatnya produksi EV untuk menekan emisi karbon, kebutuhan nikel sebagai bahan baku baterai diproyeksikan terus naik. Kenaikan ini secara teori mendorong tekanan naik pada harga, terutama ketika pertumbuhan permintaan lebih cepat daripada kemampuan pasokan untuk bertambah dalam jangka pendek. Karena itu, tren permintaan yang meningkat menjadi salah satu faktor utama yang membentuk tren harga nikel ke depan. Selanjutnya, harga Nikel memiliki dampak signifikan terhadap keputusan investasi tambang, perkembangan ekonomi perusahaan Nikel, serta negara yang bergantung pada sumber daya Nikel. Namun, terdapat ketidakpastian mengenai tren harga Nikel di masa depan, sehingga solusi untuk permasalahan ini menarik untuk dikaji lebih dalam. Penelitian ini bertujuan untuk mengetahui hasil peramalan harga nikel jangka pendek dengan menerapkan algoritma Gated Recurren Unit (GRU) yang merupakan bagian dari kecerdasan buatan (Artificial Intelligent, mengetahui akurasi peramalan harga nikel menggunakan algoritma GRU, serta menyajikan data peramalan harga informatif kepada pengguna (user). Hasil penelitian menunjukkan GRU sangat efektif dalam melakukan peramalan harga Nikel berdasarkan evaluasi kerja model menggunakan Mean Absolute Percentage Error (MAPE) sebesar 1,21%. 
PERBANDINGAN HASIL ANALISIS POLA ALIRAN DENGAN PERSAMAAN RANS DAN LES DALAM COMPUTATIONAL FLUID DYNAMICS (CFD): LITERATURE RIVIEW Thiansy, Elsy; Cahyadi, Tedy Agung; Haq, Shofa Rijalul
Indonesian Mining Journal Vol 28 No 2 (2025): Indonesian Mining Journal, October 2025
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol28.No2.2025.1664

Abstract

The settling pond functions to hold and settle suspended particles, especially Total Suspended Solid (TSS) in order to reduce the pollutant load. However, the effectiveness of settling ponds is greatly influenced by the flow characteristics and the concentration of tss carried. This research compares two numerical approaches in Computational Fluid Dynamics (CFD), namely Reynolds-Averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES). Both of these methods are widely used in turbulent flow simulations, but have different approaches and levels of accuracy in representing turbulence structures. This study reviews various recent scientific publications that apply the rans and les equations in internal and external flow cases, including settling pond applications. The review results show that the RANS equation is suitable for large-scale engineering simulations with low computational requirements but is less accurate in capturing turbulence details. The les equation provides more accurate results in capturing turbulent flow patterns than the RANS model. However, tutoring models require greater computational resources, so they need to be considered for more complex applications. From this comparison it can be concluded that the selection of equations in a CFD is very dependent on the analysis objectives, limited computing resources, and the level of data detail required.
PERBANDINGAN HASIL ANALISIS POLA ALIRAN DENGAN PERSAMAAN RANS DAN LES DALAM COMPUTATIONAL FLUID DYNAMICS (CFD): LITERATURE RIVIEW Thiansy, Elsy; Cahyadi, Tedy Agung; Haq, Shofa Rijalul
Indonesian Mining Journal Vol 28 No 2 (2025): Indonesian Mining Journal, October 2025
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol28.No2.2025.1664

Abstract

The settling pond functions to hold and settle suspended particles, especially Total Suspended Solid (TSS) in order to reduce the pollutant load. However, the effectiveness of settling ponds is greatly influenced by the flow characteristics and the concentration of tss carried. This research compares two numerical approaches in Computational Fluid Dynamics (CFD), namely Reynolds-Averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES). Both of these methods are widely used in turbulent flow simulations, but have different approaches and levels of accuracy in representing turbulence structures. This study reviews various recent scientific publications that apply the rans and les equations in internal and external flow cases, including settling pond applications. The review results show that the RANS equation is suitable for large-scale engineering simulations with low computational requirements but is less accurate in capturing turbulence details. The les equation provides more accurate results in capturing turbulent flow patterns than the RANS model. However, tutoring models require greater computational resources, so they need to be considered for more complex applications. From this comparison it can be concluded that the selection of equations in a CFD is very dependent on the analysis objectives, limited computing resources, and the level of data detail required.
EVALUASI SALURAN TERBUKA TAMBANG AREA BLOK SAWIT PT PPA JOBSITE PT MLP MENGGUNAKAN SIMULASI HEC-RAS Pradika, Soga; Rosadi, Peter Eka; Cahyadi, Tedy Agung; Waloejo Adji, Dwi Poetranto; Dwi Ratminah, Wawong
KURVATEK Vol 11 No 1 (2026): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v11i1.5889

Abstract

Area penambangan PT PPA site PT MLP tepatnya di Blok Sawit terdapat genangan di Jalan. Masalah tersebut muncul didukung dengan fakta bahwa intensitas hujan di lokasi penelitian tergolong lebat (25,61 mm/jam). Saluran terbuka menjadi salah satu infrastruktur paling penting untuk mengalirkan air limpasan. Namun terdapat lokasi yang belum terdapat saluran terbuka dan kapasitas saluran yang belum memadai. Hal tersebut menandakan sistem penyaliran tambang yang ada belum optimal. Oleh karena itu, diperlukan kajian dan rancangan saluran terbuka area Blok Sawit. Penelitian ini, estimasi debit aliran air permukaan menggunakan metode rasional dengan memperhatikan intensitas hujan (mononobe), karakteristik DTH, dan koefisien limpasan (Gautama). Nilai debit air limpasan, digunakan acuan dalam mengkaji dan merancang dimensi saluran terbuka (persamaan manning). Lalu dilakukan simulasi potensi genangan di HEC-RAS sebagai bentuk validasi atas dimensi saluran hasil perhitungan. Didapatkan nilai intensitas curah hujan sebesar 25,61 mm/jam dengan PUH 2 tahun, serta resiko hidrologi 88%. Berdasarkan perhitungan menggunakan persamaan manning dan simulasi di HEC-RAS diperlukan rancangan pada saluran terbuka 1 di DTH 4 serta perluasan pada saluran terbuka 4 di DTH 6. Adapun pada saluran terbuka 2 dan 3 kapasitas secara aktual sudah memadai.
Cost-Based Environmental Liability Assessment of Acid Mine Drainage Management within the Integrated Geo-Hydrochemical Risk Assessment (IGHRA) Framework Fanani, Yazid; Paripurno, Eko Teguh; Yudiantoro, Dwi Fitri; Cahyadi, Tedy Agung
Journal of Earth and Marine Technology (JEMT) Vol 6, No 1 (2025)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2025.v6i1.8879

Abstract

Acid mine drainage generates environmental liabilities that mining operators must translate into measurable management costs. This study assesses the cost-based environmental liability of acid mine drainage management within the Integrated Geo-Hydrochemical Risk Assessment (IGHRA) framework by linking pollution risk, treatment performance, and environmental cost into a single risk-to-cost evaluation. The study uses source characterization, mine water quality data, compliance-based risk indicators, treatment performance, and operational cost components to estimate two principal cost categories, namely restoration cost and preventive expenditure cost. Restoration cost represents the annual cost required to restore contaminated mine water until all regulated parameters comply with the applicable standard. In contrast, preventive expenditure represents the five-year cost required to suppress future acid generation from potentially acid-forming material through selective handling, temporary stockpiling, installation of compacted clay cover, and runoff control. The results show that the only CaO scenario produces the lowest treatment cost, but does not achieve full compliance because sulfate remains above the standard. The CaO 10 g/L and BaCl₂ 3.0 g/L scenario achieves full compliance and provides the most economical restoration cost among the compliant options, with an estimated value of IDR 516,463,856 per year. The total preventive expenditure cost over five years reaches IDR 3,832,950,186. At a midpoint selling price of IDR 89,000 per ton, the compliant CaO and BaCl₂ scenario exerts an environmental cost pressure of 8.58 percent on projected gross revenue. These results show that the IGHRA framework can convert acid mine drainage risk into measurable environmental liability and can support technically grounded and economically accountable mine water management.
Co-Authors A. Belo, Delia Ximenes Abdul Halim Pelu Achmad Sadikin Agung Yulianto Nugroho Agustian, Yusrian Aisyah Salma Aji Lambang Hidayah aldin ardian, aldin Alfianto, Danny Algifari, Arif Aminuyati Amrin, Dedy Andrawina Wina Angggian R., Shahensah Anand Anggoro, Hengky Ansori, Muhammad Iqbal Anton Sudiyanto Anton Sudiyanto Ardinanta, Desta Nugraha Arif Munandar Arrina Khanifa Astika Putri Roshinta Bagus Wiyono Bagus Wiyono Bambang Dwijo Pranowo Barlian Dwinagara Bimantoro, Adyaksa Bagas Butungan, Jeragustivia Dahono Haryanto Dedy Amrin Deka Citra Dinata Delia Ximenes A. Belo Divina Maria Marques Doni Firdaus Fadlil Dwi Fitri Yudiantoro Dwi Januar Ariyanto Dwi Mayanti Mega Lesmana Dwi Poetranto Waloeyo Adji Dwi Ratminah, Wawong Dwi Yolanda Sumbung Dyah Nunki Yalesrie Eddy Winarno Eddy Winarno Eddy Winarno, Eddy Edy Nursanto Edy Nursanto Edy Nursanto Edy Nursanto Edy Nursanto Eko Teguh Paripurno Eman Widijanto Erlangga, Robby Erwedi Erwedi Erwedi, Erwedi Fadlil, Doni Firdaus Faizal Agung Riyadi Fanani, Yazid Ficky Adi Kurniawan Firmansyah, Ilham Fitri Nauli Fitriani Fitriani Frans Richard Kodong Gabriel Ranteallo Gandar Mahojwala Genadi Toar Nainggolan Gunawan Nusanto Gunawan Nusanto, Gunawan Gunawan, Risal Habibah, Annisa Ummu Hadi Purwanto Halimah Tusak Diah Hana Trijayanti Haq, Shofa Rijalul Hartono Hartono Hartono Hartono Hartono Hartono Hartono Sihir Hasywir Thaib Siri Hasywir Thaib Siri Hasywir Thaib Siri hasywir thaib siri, hasywir thaib Hendriono Hengky Anggoro Herlina Jayadianti Herniti, Dwi Heru Suharyadi Ifa Aulia Chusna Ilham Firmansyah Imawati, Rika Indah Setyowati Indah Setyowati Indun Titisariwati Indun Titisariwati Indun Titisariwati Indun Titisariwati, Indun Inmarlinianto Inmarlinianto, Inmarlinianto Jeragustivia Butungan Jeremia Christopher Herbert Siregar kadek nando setiawan nando Karel Lutan Warda Ketut Gunawan Ketut Gunawan Khanifa, Arrina Kresno Kresno Kresno Kresno Kurniawan, Fitra Kusumayudha, Sari Bahagiarti Leka, Emil Salim Kahmi Lesmana, Dwi Mayanti Mega Lilik Eko Widodo Linggasari, Shenny M. Rahman Yulianto Marganiswati, Yudha Tintana Mariatul Kiptiah Marques, Divina Maria Masjon Parhusip Mendrofa, Yudha Chrisman Moh Ardiansyah Monica Warih Widi Krisanti Muhammad Arifin Nur Muhammad Fathurrahman Pitayandanu Muhammad Iqbal Ansori Muhammad Tri Aditya Muhammad Wildan Ilyasa Nainggolan, Genadi Toar Notosiswoyo, Sudarto Nugroho, Arif Rianto Budi Nur Ali Amri Nur Ali Amri Nur Ali Amri Nur Ali Amri, Nur Ali Nurkhamim Nurkhamim Nurkhamim Nurkhamim, Nurkhamim Pambayu, Aldio Kresna Pasa, Titis Ilham Permadi, Fajar Peter Eka Rosadi Peter Eka Rosadi, Peter Eka Pradika, Soga Prasetya, Johan Danu Prastistho, Widyawanto Prawira, Hadi Putranto, Fery Izzan R.Horman, Juanita Rahmat Aditya Ramadhana Adi Rusyada Rendy Fahlevi Resa Risal Pradita Reza Adhi Fajar Rika Ampuh Hadiguna Rika Ernawati Rika Ernawati Rika Ernawati Rika Ernawati Rika Ernawati Rika Ernawati Rika Imawati Risaldi Hidayat Riyadi, Achmad Riyadi, Faizal Agung Rusdi Darmawan S. Koesnaryo Sabrina Umi Khabibah Sari Bahagiarti Kusumayudha Sari Bahagiarti Kusumayudha satria fitrio SB, Waterman Septianto, Erwin Setiyawa, Meindra Shahensah Anand Angggian R. Shofa Rijalul Haq Sigit Bagus Prabowo Singgih Saptono, Singgih Siregar, Imerilda Parlina Siswahyudianto Soekamto, Untung Stephanus Maria Eduat Sudarto Notosiswoyo Sudaryanto Suharsono Suharsono Suyono Suyono Suyono Suyono Suyono Syafrianto, Syafrianto Syamsul Arifin Syari Rahma Yanti Syihab, Zuher Tasidjawa, Gabriela Elisabeth Thiansy, Elsy Totok Sulistyo Tri Aditya, Muhammad Ulfa Nindya Kesuma Warsito utami, Hasrin citra Vega Vergiagara Vinansius Jimmy Jati Waloejo Adji, Dwi Poetranto Waterman SB Waterman SB Waterman SB Waterman SB Waterman Sulistyana Bargawa Waterman Sulistyana Bargawa Waterman Sulistyana Bargawa Waterman Sulistyana Bargawa Waterman Sulistyana Bargawa, Waterman Sulistyana Wawong Dwi Ratminah Wawong Dwi Ratminah, Wawong Dwi Wenny Kartika Widijanto, Eman Widodo, Lilik Eko Widyawanto Prastistho Winda Winda Yohana Nodarika Maharani Yohana Noradika Maharani Yohanes Ary Prayoga Yulantoro, Marchell Yulfanzah Zuher Syihab