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All Journal Jurnal GEOSAPTA Jurnal Sains dan Teknologi Reaksi Jurnal Inovasi Pertambangan dan Lingkungan Jurnal Industri dan Inovasi (INVASI) Serambi Engineering Moderation: Journal of Islamic Studies Review Acta Geoscience, Energy, and Mining
Hulwani, Zati
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Religion Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Social Sciences Transportation 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.
Co-Authors Abrar Muslim Al-Huda, Nafisah Arsianda, M Nazwa Asni Asni Harisman, Hendra Ibnu Rusydy Lestari, Sri Indah Mochammad Aziz, Mochammad Muchlis Muchlis Muhammad Arief Akbar Muhammad Hanif Khuzaifi Musyafiq, Ahmad Na’im Mutia, Febi Newton, Newton Nurul Aflah Oziana*, Deea Rizki Oziana, Deea Rizki Oziana, Deea Rizki Rizki Parkhurst, Helen Pocut Nurul Alam Putera, Muzakkir Ramadhan, Muhammad Wahyu Ramadhandi, Farhan Rezaldi, Muhammad Romlah Septiyanto, Eko Siti Shofiyah Sulistianto, Budi Syifa Annaqi, Danish Ummah Karimah, Ummah Widodo, Nuhindro Priagung Yoessi Oktarini