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Journal : Indonesian Mining Journal

PROBABILITAS LONGSOR TIMBUNAN DI AREA IN PIT DUMP ASAM TIMUR DAERAH KONSESI PT ARUTMIN INDONESIA TAMBANG ASAMASAM, KALIMANTAN SELATAN Fahrezi, Muhammad Akmal; Zakaria, Zulfiadi; Khoirullah, Nur; Laksana, Prima
Indonesian Mining Journal Vol 28 No 1 (2025): Indoneisan Mining Journal, April 2025
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol28.No1.2025.1628

Abstract

Open pit mining involves excavation of soil and overburden, which requires a well-planned disposal area to maintain stockpile stability. This is achieved through an analysis of soil bearing capacity and slope stability. The research was conducted at the ASTIM In Pit Dump (IPD) using actual materials. Data were obtained from direct shear tests and physical properties tests, then statistically analyzed to determine the average value, standard deviation, and minimum and maximum relative values. These data were subsquetly input into geotechnical software to perform a slope stability analysis under pessimistic conditions, including water-saturated slopes with a horizontal seismicity coefficient of 0.045. The simulation results did not meet the stability criteria, yielding a safety factor of 0.647. Therefore, engineering design modifications were necessary, including widening the slope angle to 7.61°, consisting of six steps with a level height of 5 meters, a width of 30 meters, and a slope angle of 25°. This redesign resulted in a safety factor (SF) of 1.254 which meets slope stability criteria based on Bowles (1989) and a probability of failure (PoF) of 4.1%, in accordance with the Decree of the Minister of Energy and Mineral Resources No. 1827 K/30/MEM/2018.
Co-Authors abdullah, Fajar Abdurrahman, Ali Adiwijaya, Annisa Ayungingtyas Pratiwi Agung Mulyo Ahmad Helman Hamdani, Ahmad Helman Al Kautsar, Muhammad Ilham Alam, Boy Yoseph Cahya Sunan Sakti Syah Alpionisa, Salsabila Nur APRILIAN, YOGA Arma, Yadvi Aruan, Immanuel Hareanto Asykarulloh, Abdul Wahid Bakhtiar, Taufiq Bambang Hermanto Basuki, Jodi Prakoso Budipraja, Muhammad Ariq Chen, Reynara Davin Dandy, Leonardus Dicky Muslim Dwi Hadian, Mohamad Sapari Emi Sukiyah Ersyari, Jodistriawan Ersyari, Jordistriawan Fahrezi, Muhammad Akmal Fahrul Yahya, Moh Faisal Helmi Hendarmawan Hendarmawan, Hendarmawan Irvan Sophian, Irvan Ismawan Ismawan, Ismawan Jatsiah, Siti Nadia Ka'bah, Hanifan Cipta Muamar Laksana, Prima Madani, Ghoffar Cahya Mahayana, Ringkang Gumiwang MANIK, VITO ARISTO MATUZA, MUHAMMAD HERYOGA Maulana, Muhamad Arief Monica, Utari Sonya Mubarak, Aziez Muhammad Kurniawan Alfadli Nana Sulaksana NINGRUM, WIWIN JUNITA Nurohim, Dede Pajrin, Ulfia Sari Pramudyo, Tulus Prasetio, Rio Akmal Rizky Princessca, Channia Pringgo Kusuma Dwi Noor Yadi Putra Putra, Rafino Kurnia Putri, Revena Denia Raden Irvan Sophian, Raden Irvan Rahmi, Nisa Shafira Muthia Rizki, Afdal Rukmana, Yanwar Yusup Saprana, Rifqi Dwi Shafira, Nisa Sihotang, Josua Washington Siti Khodijah Sophian, R. Irvan Sugiawati, Gisa Nurputri Syaiful Alam Taufiq, Mochamad Muslim Ulhaque, Thaha Rizal Umboro, Sindhu Waliana, Teuku Yan Waromi, Doodle Dandy Wicaksana, Kintan Adelia Arum Yohanes Tan, Yohanes Yusi Firmansyah, Yusi Yuyun Yuniardi Zakaria, Zulfiadi Zufialdi Zakaria Zulfialdi Zakaria, Zulfialdi