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All Journal SMARTek Jambura Geoscience Review Geosains Kutai Basin Tadulako Science and Technology Journal
Irianto Uno
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POTENSI BAHAN GALIAN DAN MITIGASI BENCANA ALAM DI WILAYAH SULAWESI TENGAH Uno, Irianto
SMARTek Vol 8, No 1 (2010)
Publisher : SMARTek

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (262.537 KB)

Abstract

Proses geologi yang terjadi di Sulawesi Tengah membawa potensi bahan galian baik bahan galian padat maupun cair, di darat ataupun di wilayah laut. Potensi tersebut umumnya telah diselidiki, sebagian telah berproduksi, sebagian dalam tahap eksplorasi dan penyelidikan pendahuluan. Namun, proses geologi tersebut juga terkait dengan potensi bencana. Bentuk topografi dan kerawanan longsor pada banyak kawasan serta ruas-ruas jalan strategis di wilayah ini sangat terkait dengan struktur material yang rapuh dan dipicu kegempaan serta perubahan tata guna lahan. Karenanya, sangat dibutuhkan optimalisasi terhadap pemanfaatan bahan galian dan secara bijak mengelola lingkungan dimana didalamnya termasuk prasarana jalan, jembatan, permukiman dan pengembangan wilayah
Studi Prospek Reservoar Hidrokarbon Berdasarkan Karakteristik Petrofisika di Lapangan ‘X’ Cekungan Sebuku Jayadi, Harsano; Imran, Syahdan Ali; Atmoko, Widi; Uno, Irianto; Meidji, Icha Untari
GEOSAINS KUTAI BASIN Vol. 7 No. 1 (2024)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v7i1.1275

Abstract

The research was conducted to determine the hydrocarbon reservoir zone in the LIM-1 well, which was analyzed using quantitative and qualitative methods to assess the reservoir type involving several log data, including gamma ray (GR), neutron (NPHI), and density (RHOB). The quantitative analysis stage is the determination of hydrocarbon content by the crossover of NPHI log data, and RHOB log data with six target zones. The quantitative analysis stage in this study uses Interactive Petrophysics (IP) software version 3.5 on well LIM-1, also with target zone 1 only. The results obtained from qualitative and quantitative analysis at well LIM-1 show that there are three types of reservoirs in the study area from several target zones according to depth, which are dominated by oil, water, and gas.
Determination of Slope Safety Factor Based on Hoek & Brown Collapse Criteria on Ampera-Surumana Road Section Nugraha, Agung; Uno, Irianto; Asrafil, Asrafil
Tadulako Science and Technology Journal Vol. 5 No. 1 (2024): Tadulako Science and Technology Journal
Publisher : LPPM Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/sciencetech.v5i1.17178

Abstract

Introduction: One way to determine whether a slope is stable or not is by using the safety factor criterion. The method to determine the safety factor using the limit equilibrium method. Administratively the research area is located in the village of Salubomba, Central Banawa District, Donggala Regency, Central Sulawesi Province. The results of the study are also expected to be used as one of the basis for planning the design of stable slopes in the area Method: The methods used in this research were qualitative and quantitative. The process in this research was carried out with each method. The process of collecting secondary data and primary data is carried out by Geology and Geological Engineering methods both qualitatively and quantitatively. Results and Discussion: Observations in this study were made in the field in the form of observations of bridging on road slopes. The bruises in the study area are grouped on the basis of their shape and genetics. Through the results of observations and measurements on rock slopes at the research site. Based on data processing on the GEOSTUDIO 2018 R2 software application. Then, the value of the slope safety factor at observation station 1 is 2.316. Conclusion: Based on testing and analysis of the Hoek & Brown collapse criteria method, it can be concluded that the value of the slope safety factor at observation stations 1, 2, 3, 4, and 5 is 2.316; 2.029; 1.765; 1.658; 2.622 respectively. At station 4 the level of vulnerability is medium (Landslides can occur), at station 3 is at a low level of vulnerability (Landslides rarely occur), while at stations 1,2 and 5 are at a very low level of vulnerability (Landslides very rarely occur).
Analysis Slope Stability Using RMR and SMR Method in Nupaomba Area Tanantovea Donggala Uno, Djamal Adi Nugroho; Uno, Irianto; Saputra, Apriadi; Arum, Deno Ambar; Mumin, Riqa Permatasyara; Alfaed, Moh Rizky Fadel
Jambura Geoscience Review Vol 7, No 1 (2025): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v7i1.30388

Abstract

Landslide disasters frequently occur in the Nupabomba area due to its steep slopes and its role as a primary access road for the local community. This study aims to analyze slope stability using the Rock Mass Rating (RMR) and Slope Mass Rating (SMR) methods to assess the potential for landslides. The research was conducted at coordinates (Universal Transverse Mercator) UTM 829117.90 – 831853.89 mE and 9920980.82 – 9920308.34 mS. Data collection involved field measurements using the scanline method, focusing on discontinuities, lithology, and rock strength. The results indicate that at Station 01, the slope consists of slate rock with an RQD value of 70% and UCS of 23 MPa. The calculated RMR value is 58, placing it into Class III (fair rock), with an SMR value of 55.4, indicating partially stable conditions. Meanwhile, at Station 02, the slope consists of phyllite rock with an RQD value of 70% and UCS of 52 MPa. The RMR value is 62, classifying it as Class II (good rock), and the SMR value is 61.6, indicating a stable condition. These findings provide crucial insights into the geotechnical characteristics of the area, which are essential for landslide risk mitigation and infrastructure planning. The study highlights the need for continuous monitoring and possible reinforcement strategies, particularly in areas categorized as partially stable. Further research incorporating geotechnical modeling and additional stability analysis is recommended to enhance slope stability predictions and inform mitigation strategies.
Co-Authors Agung Nugraha Alfaed, Moh Rizky Fadel Apriadi Saputra Arum, Deno Ambar Asrafil Asrafil Djamal Adi Nugroho Uno Harsano Jayadi Imran, Syahdan Ali Listianti, Ajeng Meidji, Icha Untari Mumin, Riqa Permatasyara Widi Atmoko Zeffitni Zeffitni