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All Journal Proceedings of Annual International Conference Syiah Kuala University - Life Sciences & Engineering Chapter Jurnal Ilmiah Mahasiswa Teknik Kebumian Jurnal Sains dan Teknologi Reaksi ASEAN Journal of Chemical Engineering Journal Of Human And Education (JAHE) Makara Journal of Science Aceh International Journal of Science and Technology PESARE: Science and Engineering Service Journal Serambi Engineering JURNAL REKAYASA KIMIA & LINGKUNGAN Jurnal Mitra Pengabdian Farmasi
Pocut Nurul Alam
Universitas Syiah Kuala
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Public Health Social Sciences Other

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Analysis of the Effect of Rainwater Infiltration on Slope Stability Using the Limit Equilibrium Method at the Outpit Disposal, Serongga Site, PT Baramega Citra Mulia Persada Hulwani, Zati; Muhammad Hanif Khuzaifi; Nurul Aflah; Abrar Muslim; Yoessi Oktarini; Pocut Nurul Alam
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Slope stability in mining areas is a critical aspect that must be carefully considered, particularly in regions with high rainfall intensity. Heavy rainfall can increase the risk of slope failure, disrupt mining operations, and reduce planned production targets. This study investigates the effect of rainfall infiltration on slope stability at PT Baramega Citra Mulia Persada, Kotabaru, South Kalimantan, Indonesia. The Limit Equilibrium Method (LEM) using the Janbu method was applied to evaluate the Factor of Safety (FoS) under different moisture conditions and to assess the influence of rainfall infiltration on slope performance in the outpit disposal area. FoS calculations were conducted on four slope cross-sections, namely AA’, BB’, CC’, and DD’, based on geotechnical and rainfall data. The results indicate that each slope exhibits variations in FoS under different moisture conditions. Slope AA’ shows FoS values of 1.48 (saturated), 1.976 (partially saturated), and 2.007 (dry). Slope BB’ has FoS values of 1.311, 1.650, and 1.711, while slope CC’ exhibits FoS values of 1.516, 2.187, and 2.279. Slope DD’ represents the most critical condition, with the lowest FoS values of 1.106 (saturated), 1.374 (partially saturated), and 1.470 (dry). To improve stability, a geometric modification was applied to slope DD’ by adding an additional bench with a height of 4.3 m, which increased the FoS to 1.514 and satisfied the mine slope stability criteria.
Production Optimization Analysis Based on Effective Working Hour of Mobile Crusher Unit 02: Case Study in PT Mifa Bersaudara, West Aceh Oziana, Deea Rizki; Syafitri Amanda; Nurul Aflah; Pocut Nurul Alam; Nurul Kamal
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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PT Mifa Bersaudara is a coal mining company located in Meureubo, West Aceh, Indonesia. This study evaluates and optimizes the Effective Working Hours (EWH) of Mobile Crusher 02 (MC02), one of the key units in the coal crushing process. The primary constraint identified is the inability to achieve production targets due to excessive downtime, particularly standby time and equipment breakdowns, which significantly reduce operational efficiency. A quantitative descriptive approach was applied using primary field observations and secondary production data from May to June 2025. The analysis focused on downtime components, effective working hours, and equipment availability based on Mechanical Availability (MA), Physical Availability (PA), Utilization of Availability (UA), and Effective Utilization (EU). Results indicate that MC02 operated for an average of only 7 effective working hours out of 10.05 available hours, reflecting an efficiency level of 69.65%. Standby time accounted for the largest portion of downtime at 141.86 hours. Following the implementation of operational improvements aimed at reducing delays, overall efficiency increased, and production rose from 128,505 tons to 168,864 tons, achieving 112% of the targeted output. These findings demonstrate that improving EWH has a direct and significant impact on crusher productivity and provides a foundation for future operational optimization in the coal processing system.
Co-Authors . Mariana . Suryani Abrar Muslim Adi Salamun Akhar Ilhamdi Al-Huda, Nafisah Anwar Fuadi Anwar Fuadi, Anwar Atiqah Aida Bern Klein Cut Meurah Rosnelly Darmadi Darmadi Darmadi Darmadi Edi Munawar Ernawati Ernawati FARID MULANA Febi Mutia Fikri Hasfita Hadif, Fauzil Harisman, Hendra Hendra Hasrisman Hulwani, Zati Husni Husin Husni Husin Husni Husin Husni Husin, M.T. Ibnu Rusydy Ilhamdi, Akhar Isra Adelya Izzati Izzan Nur Aslam Justaman Arifin Karo karo Kana, Muhammad Rizki Karo karo, Justaman Arifin Klein, Bern Komala Pontas Kurniawan, Reinaldy Mirna Rahmah Lubis MUCHLIS Muhammad Dani Supardan Muhammad Hanif Khuzaifi Muhammad Zaki Muhammad Zaki Nestor Orcon Normalina Arpi Nurhazanah Nurhazanah Nurhazanah, Nurhazanah Nurul Aflah Nurul Aflah Nurul Kamal Orcon, Nestor Oziana, Deea Rizki Pramana, Agus Hari Rahmadi Siahaan Raiyan Soekarno Ramadhandi, Farhan Reza Fauzan Rima Dhinta Dewi Astuti Rizal Syahyadi S Syafruddin Sedik, Samuel Paulus Simbolon, Zulfan Khairil Soekarno, Raiyan Syafitri Amanda Syaubari Teuku Maimun Teuku Muhammad Daffa Rihayat Teuku Rihayat Teuku Rihayat Teuku Rihayat Teuku Rihayat Umi Fathanah Umi Qhanita Putri Swya Wahyu Rinaldi Yoessi Oktarini Yulianis Yulianis Yunardi Yunardi yunardi, yunardi