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All Journal Journal of Degraded and Mining Lands Management Forum Geografi Journal of Geoscience, Engineering, Environment, and Technology PROMINE Jurnal Chemurgy Gorontalo Journal of Forestry Research Specta Journal of Technology INDONESIAN MINING PROFESSIONALS JOURNAL JOURNAL SCIENTIFIC OF MANDALIKA (JSM) Jurnal Sosial dan Teknologi Journal Transformation of Mandalika Jurnal Riset Teknik Pertambangan Journal of Comprehensive Science MINERAL Nusantara Civil Engineering Journal INTAN Jurnal Penelitian Tambang Jurnal Sosial dan Sains Jurnal Penelitian Rumpun Ilmu Teknik Jurnal Manusia dan Lingkungan JURNAL TEKNOLOGI MINERAL FT UNMUL
Shalaho Dina Devy
Fakultas Teknik Universitas Mulawarman
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Other

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Journal : journal of geoscience engineering environment and technology

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Groundwater Effect on Slope Stability in Open Pit Mining: a Case of West Kutai Regency, East Kalimantan, Indonesia Shalaho Dina Devy; Pretty Permatasari Hutahayan
Journal of Geoscience, Engineering, Environment, and Technology Vol. 6 No. 4 (2021): JGEET Vol 06 No 04 : December (2021)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2021.6.4.6226

Abstract

The stability of open pit slopes in Biangan district, West Kutai Regency, East Kalimantan Province, is greatly influenced by groundwater conditions. The existence of groundwater reduces the shear strength of the materials which causes a decrease in the stability value of pit slopes. The main objective of this study is to assess the impact of groundwater on the stability of the low wall and high wall pit mining. Groundwater modeling is used to determine the prediction of groundwater level on the pit slope which determines the value of the slope stability. Slope stability analysis in this study was performed using the Finite Element Method, producing output in the form of strain zones, deformation and displacement values. Therefore, the Strength Reduction Factor (SRF) approach was used, which is a gradual reduction of shear strength until the values of cohesion and friction angles reach minimums and the slopes are at a critical state. Groundwater modeling results indicate that groundwater flows to the Biangan river with hydraulic heads between 76 and 108 meters above sea level. Based on the analysis using the Finite Element Method, the stability values of the pit slopes, which are influenced by groundwater, are 0.65 on the low wall and 1.40 on the high wall. The total displacements are 0.019 meters on the low wall and 0.002 meters on the high wall. The impact of groundwater on the slope is an increase in the slope load. This increases the materials’ thrust and reduces the shear strength of the materials which reduces the rock mass that can function as a water seepage path. Thus, the recommendation for low wall pit construction is a safety factor of 7.79 with a total displacement of 0.020 meters.
Co-Authors Abdul Rijal Mukmin Achmad Faisal Agus Winarno Agus Winarno Agus Winarno Agus Winarno Agus Winarno, Agus Ainayah Al Fatihah Aipassa, Marlon Ivanhoe Albertus Juvensius Pontus Aline Thresa Ardhan Ismail Ardian, Sandy Arifin, Dawamul Ivanhoe Ashabul Kahfi, Ashabul Bryan Andreas Turnip Christian Sarungallo Christian Sarungallo Dean Ryanda Putra Donal, Donal Dony Prakasa Eka Putra Eva Indriani Sanggalangi Fasih Hardian Fauzan Dwi Syahputra Fitri Nur Fadilah Gampang Toha Gayus Irwanto Andeina Ginting, Emdananta Grecensius Jevino Hadis Hamzah Umar Hamzah Umar Harjuni Hasan Harjuni Hasan Harjuni Hasan Henny Magdalena Heru Hendrayana Heru Susilo Ibnu Hasyim Ibnu Hasyim Ibnu Hasyim IMANG, NDAN Irfan Irfan Irvan Oktaviandi Jaba, Yafet Krisanto Yardin Panggeso Kristiningrum, Rochadi Kristiningrum Kusnanto, Fransiska Angelina Lifia Kemala Dewi Lucia Litha Respati Lucia Litha Respati Lucia Litha Respati Mardan Ali Mohammad Geraldo fahmi Musodiq Musodiq Nugroho, Windhu Nur Aqsa Syahban Irwan Oktaviani, Reva Pradipta Baehaqi Pretty Permatasari Hutahayan Putri Lufian Tika Putri, Agita Kendari Respati, Lucia Litha Revia Oktaviani Revia Oktaviani Revia Oktaviani Rifki Amin Ma’sum Rinto Syahreza Pahlevi Sakdillah Sakdillah Sakdillah Sakdillah Sandri Tandi Rapang Sarungallo, Christian Sarwono, Edy Kristiningrum Sendana, Aprianto Aris Sharon Tria Kurniawati Silaban Suhaila Ridwan Suharni Suharni Tommy Trides Tommy Trides Tommy Trides Tommy Trides Trides, Tommy William William Windhu Nugroho Windhu Nugroho windhu Wiradhana, Ni Made Ayu Dwi Kartika Zwageri, Rizky