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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) EKSAKTA : Jurnal Penelitian dan Pembelajaran MIPA Astonjadro SELODANG MAYANG Journal La Lifesci Journal La Multiapp Jurnal Teknik Sipil Macca Ranah Research : Journal of Multidisciplinary Research and Development Warta LPM Celebes Journal of Community Services Seminar Nasional Riset dan Teknologi (SEMNAS RISTEK)
Desi, Natsar
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Journal : Journal La Multiapp

 1 
Evaluation of Slope Stability in Mining Areas Using the Morgenstern Price Method Haeriska, Haeriska; Chaerul, Muhammad; Desi, Natsar; Harun, A. Muh. Yusuf; Erniati, Erniati; Marzuki, Ismail
Journal La Multiapp Vol. 6 No. 6 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i6.2540

Abstract

Indonesia’s mining sector, particularly in areas like Morowali Regency, Central Sulawesi, faces significant geotechnical challenges due to its location in the Pacific Ring of Fire. One of the key concerns in open-pit mining operations is slope instability, which can lead to landslides, threaten worker safety, damage infrastructure, and disrupt production. This study evaluates the slope stability in the Sambalagi site of PT. Wosindo Berkat Abadi using the Morgenstern-Price method, a limit equilibrium approach known for its accuracy in heterogeneous slope conditions. Field data were collected, including slope geometry, geological conditions, material strength, and hydrogeological factors. The safety factor (FK) was calculated based on geotechnical parameters such as cohesion, internal friction angle, and unit weight of the slope materials primarily saprolite and limonite. The actual slope FK value at PIT D was found to be 0.974, below the standard requirement (≥1.3) set by the Ministerial Decree No. 1827K/30/MEM/2018. To improve stability, a revised slope design was proposed, including reducing slope angles to 35°, increasing bench widths to 2 meters, and decreasing slope height per bench to 4 meters. The simulation of this revised geometry showed that it could achieve the required FK value. The study contributes to safer and more efficient mine planning by demonstrating the importance of integrating detailed geotechnical analysis in slope design, especially in tropical high-rainfall mining regions.
Design of Mine Distribution System at Nickel Mining Front of Pt. Cipta Djaya Surya Mulyadi, Mulyadi; Chaerul, Muhammad; Desi, Natsar; Bachtiar, Erniati; Harun, A. Yusuf; Marzuki, Ismail
Journal La Multiapp Vol. 7 No. 1 (2026): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v7i1.2647

Abstract

Nickel mining activities at PT. Cipta Djaya Surya in Molore Village, North Konawe Regency, face a serious problem in the form of stagnant runoff in the mine front area due to the lack of an adequate drainage system and sedimentation pond. This condition not only disrupts smooth mining operations but also has environmental impacts, such as reddish discoloration of coastal waters and potential siltation. This study aims to analyze surface runoff discharge, design open channel dimensions, and design settling ponds appropriate to the hydrological and topographical conditions of the study site. The methods used include collecting rainfall data for the past 10 years from the Meteorology, Climatology, and Geophysics Agency (BMKG), hydrological analysis using the rational method, hydraulic calculations using the Manning equation, and planning channel and settling pond dimensions based on runoff discharge. The results indicate that the maximum runoff discharge in the study area can be managed by designing a trapezoidal open channel with dimensions appropriate to the flow capacity, while the designed settling pond can accommodate the runoff volume without overflowing. The implementation of a planned drainage system is expected to maintain smooth mining operations, minimize the risk of landslides, and mitigate the impact of coastal environmental pollution. Therefore, this research supports the implementation of Good Mining Practice (GMP) principles and can be used as a reference in sustainable mine drainage planning.
Co-Authors Abdul Karim Abdul Karim Abu, Arman Andi Muh. Dayri Satriawan Anugrah, Anugrah Asrudin, Asrudin Chaeruel, M Chaerul, Muh Dirman, Eris Nur Erniati Bachtiar Erniati Erniati Fatmeriany, Fatmeriany Gusty, Sri Hadi, Abri Haeriska, Haeriska Harun, A. Muh. Yusuf Harun, A. Yusuf Harun, Muh. A. Yusuf Idris, M. Naufal Az Zarqan Imran T, Muh. Irmawan Irmawan Ismail Marzuki Ismail Marzuki Jamilah Jamilah Lismawati, Lismawati Mahmud Mahmud Muh Yusuf Harun, A Muh. Chaerul, Muh. Muhammad Azis Muhammad Azis Muhammad Chaerul Mulyadi Mulyadi Musliani, Musliani Nyiwi, Andri Andi Poppy Indrayani POPPY INDRAYANI, POPPY Rachman, David Sumantri Ritnawati Makbul Rosnaini Daga Satriawan, Andi Muh. Dayri Sry Gusty, Sry Sunusi, Widia Anggraeni Wintari, Ni Kadek Yoom, Lilis Irjayanti Yusuf Harun, A