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Barlian Dwinagara
Program Studi Teknik Pertambangan, Fakultas Teknologi Mineral Universitas Pembangunan Nasional “Veteran” Yogyakarta Jl. SWK 104 (Lingkar Utara), Yogyakarta 55283 Indonesia
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation Other

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PENILAIAN PERBANDINGAN KESTABILAN LERENG BATUAN MENGGUNAKAN GENERALIZED ANISOTROPIC DAN JOINT NETWORK Akbar, Wahyu Nusantara; Barlian Dwinagara; Singgih Saptono; Dahono Haryanto; Shofa Rijalul Haq; Bagus Wiyono; Oktarian Wisnu Lusantono
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.No1.2025.1548

Abstract

Rock slope stability analysis in a geotechnical study is an important issue in mining engineering. Kinematic analysis is a well-known method to determine potential failures of the rock slope based on structural orientations, but it sometimes disregards the structural properties information. Structural properties are often known as the highly interpreted domains in rock slope engineering; thus, simplification was made for the analysis. Simplification may lead to vague conditions of analysis and reduce its accuracy. Therefore, the aims of this research is to assess the effect of rock structure properties such as heterogeneity, discontinuity, and anisotropic properties of the rock mass. The assessment conducted using the limit-equilibrium method employed the Generalized Anisotropic (GA) material model were compared with finite element method (FEM) using the shear strength reduction (SSR) method employing the joint network rock mass model. The analysis results show that an actual rock slope with a generalized anisotropic material model in the LEM analysis and joint network material model in the FEM analysis is stable with Safety Factor > 1, and the maximum strain model is less than the minimum strain threshold (maximum strain < 0.1). Combining rock slope stability analysis methods aims to produce accurate and representative results regarding the rock mass' condition. This research improves the interpretation of rock slope stability analyses, resulting in a more accurate estimation of the factor of safety (FOS).
RANCANGAN TEKNIS PERBAIKAN JALAN ANGKUT UNTUK MENINGKATKAN USIA PAKAI BAN DUMP TRUCK DI PT DJAVA BERKAH MINERAL, PETASIA TIMUR, MOROWALI UTARA, SULAWESI TENGAH Thoat, Yusuf Abyan Satria; Dwinagara, Barlian; Ernawati, Rika; Winarno, Eddy; Herniti, Dwi
Jurnal Teknologi Pertambangan Vol. 9 No. 2 (2024): Januari 2024
Publisher : Universitas Pembangunan Nasional Veteran Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jtp.v9i2.11871

Abstract

PT Djava Berkah Mineral (PT DBM) merupakan perusahaan penyedia jasa pertambangan yang beroperasi di Kabupaten Morowali Utara, Sulawesi Tengah. PT DBM saat ini melaksanakan kegiatan pada Blok Peboa yang baru dimulai pada Oktober 2022. Hasil pengamatan di lapangan menunjukkan kondisi jalan angkut kurang baik, yang berpotensi memengaruhi usia pakai ban. Penelitian ini bertujuan untuk menganalisis hubungan kondisi jalan angkut terhadap usia pakai ban, dan mengupayakan perbaikan kondisi jalan angkut untuk meningkatkan usia pakai ban. Berdasarkan hasil penelitian diperoleh nilai total resistance pada unit Quester dan AXOR masing-masing sebesar 3164,60 lbs dan 2484,61 lbs dengan usia pakai ban yaitu 511,2 dan 409,6 jam. Setelah diupayakan perbaikan kondisi jalan angkut, grade jalan maksimal dapat ditekan dari 22% hingga 10% dan diketahui nilai total resistance pada unit Quester dan AXOR masing-masing menjadi sebesar 1460,93 dan 1141,02 lbs. Pada perhitungan Regresi Linear Sederhana diperoleh persamaan Y = -0,2284x + 1207,5 dengan nilai R2 sebesar 0,7752 dan berdasarkan persamaan tersebut diprediksi usia pakai ban pada unit Quester dan AXOR masing-masing sebesar 935,2 dan 884,9 jam, meningkat rata-rata sebanyak 97,67 %.  
Pengaruh Diskontinuitas Terhadap Kestabilan Lereng Batuan Terkekarkan Studi Kasus Kuari Andesit PT Lola Laut Timur Kabupaten Bogor Irwan, Andesta Granitio; Koesnaryo, S.; Dwinagara, Barlian; Saptono, Singgih
PROMINE Vol 9 No 2 (2021): PROMINE
Publisher : Program Studi Teknik Pertambangan, Fakultas Sains dan Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v9i2.2433

Abstract

Discontinuity in a rock mass has an influence on the stability of a rock slope because it is one of the controlling factors of slope failure. In this study, an analysis was carried out on the role of discontinuities, namely joints and lithic tuff layers on slope stability and the effect of persistent parameters and joint roughness on the safety factor of safety factor. The analysis used is the effect of changes in the thickness of the lithic tuff, persistence and the value of joint roughness on the value of the safety factor. Processing of slope stability data using Rocscience RS2 Software with Finite Element Method modeling with rock mass modeling used in the analysis, namely the Veneziano Model. The results showed that an increase in the thickness of the lithic tuff layer resulted in a decrease in the safety factor of the slope up to 1.37%. The effect of the persistence parameter on the slope safety factor was found that the higher the persistence value, the lower the slope safety factor value up to 2,9% and changes in the JRC value decreased the safety factor value up to 1,7%.
ANALISIS METODE NUMERIK PENGARUH HUJAN TERHADAP KESTABILAN LERENG TUNGGAL TIMBUNAN DI TAMBANG TERBUKA BATUBARA Akbar, Wahyu Nusantara; Dwinagara, Barlian; Saptono, Singgih; Haq, Shofa Rijalul; Lusantono, Oktarian Wisnu; Prabandaru, Prasodo Datu
Jurnal Teknologi Mineral dan Batubara Vol 21 No 1 (2025): Jurnal Teknologi Mineral dan Batubara Edisi Januari 2025
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol21.No1.2025.1599

Abstract

Indonesia, with its tropical climate and high rainfall, especially near the equator, is prone to slope instability influenced by intense rainfall events. Rainfall increases pore water pressure, reduces effective stress, and decreases shear strength, which in turn lowers the safety factor and increases the probability of failure. However, studies on pore pressure changes during rainfall infiltration have not been extensively studied, particularly in Indonesia. This study aims to analyze the effect of rainfall on the stability of a single slope in a waste dump using a numerical method based on a coupled hydro-mechanical approach. Simulations were conducted using transient finite element analysis (TFEA) to evaluate pore water pressure variations. In addition, the limit equilibrium method (LEM) modeling was also carried out to assess changes in slope safety factors. The analysis was performed using Slide2 software under various rainfall and duration scenarios, with a total of 1,568 model combinations over a 24-hour simulation period. The results show that rainfall events reduce the safety factor value by up to 31.54%. The relationship between the safety factor value and rainfall can be expressed by the equation FK = 2,1607 CH-0,05, which shows a strong correlation with an R2 value of 0,9309.
ANALISIS METODE NUMERIK PENGARUH HUJAN TERHADAP KESTABILAN LERENG TUNGGAL TIMBUNAN DI TAMBANG TERBUKA BATUBARA Akbar, Wahyu Nusantara; Dwinagara, Barlian; Saptono, Singgih; Haq, Shofa Rijalul; Lusantono, Oktarian Wisnu; Prabandaru, Prasodo Datu
Jurnal Teknologi Mineral dan Batubara Vol 21 No 1 (2025): Jurnal Teknologi Mineral dan Batubara Edisi Januari 2025
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol21.No1.2025.1599

Abstract

Indonesia, with its tropical climate and high rainfall, especially near the equator, is prone to slope instability influenced by intense rainfall events. Rainfall increases pore water pressure, reduces effective stress, and decreases shear strength, which in turn lowers the safety factor and increases the probability of failure. However, studies on pore pressure changes during rainfall infiltration have not been extensively studied, particularly in Indonesia. This study aims to analyze the effect of rainfall on the stability of a single slope in a waste dump using a numerical method based on a coupled hydro-mechanical approach. Simulations were conducted using transient finite element analysis (TFEA) to evaluate pore water pressure variations. In addition, the limit equilibrium method (LEM) modeling was also carried out to assess changes in slope safety factors. The analysis was performed using Slide2 software under various rainfall and duration scenarios, with a total of 1,568 model combinations over a 24-hour simulation period. The results show that rainfall events reduce the safety factor value by up to 31.54%. The relationship between the safety factor value and rainfall can be expressed by the equation FK = 2,1607 CH-0,05, which shows a strong correlation with an R2 value of 0,9309.
Co-Authors Akbar, Wahyu Nusantara aldin ardian, aldin Andesta Granitio Irwan Ansyarullah[ Ansyarullah[ Ansyarullah[, Ansyarullah[ Arga Satria Tama Azkiya, Ahmad Azkal Bagus Wiyono Bagus Wiyono Bagus Wiyono, Bagus Bartolomeus Windyaldi Saksono Bimo Wicaksono Cahyadi, Tedy Agung Dahono Haryanto Dewi Ayu Kusumaningsih Donald R Nainggolan Eddy Winarno Eddy Winarno Eddy Winarno, Eddy Eko Aditya Gosin, Misba Haq, Shofa Rijalul Hariyadi, Sundek Herian Sudarman Hemes Herniti, Dwi Heru Sigit Purwanto Horman, Juanita R. Ilep Prengki Ilham Firmansyah Indra Wahyu Murtyanto Indra Yuspiar Indri Lesta Siwidiani Indun Titisariwati, Indun Inmarlinianto Inmarlinianto Isser Samuel Tumalang Istifari Husna Rekinagara Karmila Laitupa Ketut Gunawan Koesnaryo, S Koesnaryo, S. Laitupa, Karmila Laode Jonas Tugo Lidana Erfiandri Linggasari, Shenny Lusantono, Oktarian Wisnu Metboki, Matilda Muhammad Iqbal Ansori Naomita Salsavilla Nova Regiana Okky Chandra Perdana Oktarian Wisnu Lusantono Oktarian Wisnu Lusantono Parissing, Vinsentia Pinontoan, Vhinsky Efraim Ponco Sujarmiko Prabandaru, Prasodo Datu Rahmatyo Gilang Trilaksono Ramadhan, Muhammad Raflie Ratna Mustika Dewi Rika Ernawati Rika Ernawati S Koesnaryo S Koesnaryo S Koesnaryo S Koesnaryo S. Koesnaryo Sabrina Sabrina Saptono Singgih Saputro, Kristanto Jiwo satria fitrio satria fitrio Shofa Rijalul Haq Sidik Muhamad Singgih Saptono, Singgih Sudarsono Sudarsono Sujarmiko, Ponco Suratman Tahan, Yosef Marchiano Tama, Arga Satria Tedi Agung Cahyadi Tedy Agung C Thoat, Yusuf Abyan Satria Tugo, Laode Jonas Tumalang, Isser Samuel Untung Sukamto Wanda Suratman Yosef Marchiano Tahan Zulpryadi Mubarak