Article Per Year (5 Year)
p-Index From 2019 - 2024
1.556
P-Index
This Author published in this journals
All Journal Bulletin of Scientific Contribution : Geology Prosiding Temu Profesi Tahunan PERHAPI Journal of Geosciences and Applied Geology
Raden Irvan Sophian
Fakultas Teknik Geologi, Universitas Padjajaran
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science

Published : 11 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search
Journal : Journal of Geosciences and Applied Geology

 1 
Brief Communication: Rapid Assessment of landslide events based on UAV photogrametry: The 9 January 2021 Cimanggung Landslide, Sumedang, Indonesia Ali Abdurrahman; Muhammad Ariq Budipraja; Nur Khoirullah; Faisal Helmi; Raden Irvan Sophian
Journal of Geological Sciences and Applied Geology Vol 4, No 2 (2021): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v4i2.32063

Abstract

The landslide incident in Cisarua Village, Cimanggung District on January 9, 2021, is one of the natural disasters which is quite concerning to see the victims. This short mapping is focused on seeing changes in the shape of the affected area and slope faces before the landslide and after the incident. The brief mapping uses the DJI Mavic Pro model UAV that flies at an altitude of 50 meters and 150 meters above the ground with an overlap of 80% and covers an area of 3 ha. Aerial photo processing will produce output in the form of orthophoto images and digital elevation models (DEM) of landslide affected areas. The result of geometric observation showed that the land surface was covered with an area of 3,789 m2. The measured flat length ranges from 120 meters and 32 meters wide. There is also a slope angle after and before the landslide of 2.8 degrees. Analysis of the causes of landslides in terms of geomorphological aspects shows the landslide affected areas that are right in the hilly valleys coupled with buildings that cover the surface water flow from high rainfall. In addition, the analysis of the causes of technical geological analysis shows that landslides can occur due to differences in soil types with different physical properties so that the two soils are not bound by cohesion forces between soils.
SIMULATION OF OPD WASTE DUMP SLOPE USING THE MORGENSTERN-PRICE METHOD IN WORK AREA OF PT. XYZ TBK. PASER DISTRICT, EAST KALIMANTAN PROVINCE Lizzy Evsa Audrey; Raden Irvan Sophian; Sapari Dwi Hadian
Journal of Geological Sciences and Applied Geology Vol 7, No 1 (2023): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v7i1.48280

Abstract

The research was conducted at a company working in the coal mining contract sector, namely PT. XYZ Tbk. OPD is located in Paser Regency, East Kalimantan. The research aims to create a slope simulation for analysis. This analysis is used to determine the safety value factor with the influence of the parameters used, with reference to the safety value factor based on safe slope criteria according to KEPMEN ESDM Number 1827 K /30/MEM/2018. Parameters in the simulation are material properties in the form of unit weight, cohesion and internal friction angle. The material used is bedrock material in the form of sandstone, and overburden material in the form of a mixture of sandstone and claystone. Engineering is carried out by considering the condition of the groundwater table, namely full saturation and the earthquake vibration coefficient, to be analyzed using the Morgenstern-Price method. The safety factor value that has been obtained in the slope simulation is 1,216, the safety factor value includes unsafe slopes which are affected by groundwater conditions and earthquake vibrations.
Slope Stability Analysis on Muaraenim Formation, South Sumatera, Indonesia Thaha Rizal Ulhaque; Nur Khoirullah; Raden Irvan Sophian; Zufialdi Zakaria
Journal of Geological Sciences and Applied Geology Vol 3, No 2 (2019): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v3i2.23206

Abstract

Slope stability analysis is a necessary aspect in open mining operations. The research location is in the Muaraenim Formation, South Sumatra, Indonesia. In this study, the level of slope stability is determined by the value of the Safety Factor (FS). The method used is limit equilibrium, the Spencer method. The results of this study indicate that FS values are influenced by the angle of the slope, where with decreasing degree of slope, the FS value will increase. In addition, the FS value is also directly proportional to the cohesion value of the slope materials.
Potential Collapse Based on Discontinuity Plane In The Andesite Quary Of Mount Geulis, Jatinangor District, Sumedang Regency, West Java Mochamad Muslim Taufiq; Raden Irvan Sophian; Nur Khoirullah; Zulfialdi Zakaria
Journal of Geological Sciences and Applied Geology Vol 5, No 2 (2021): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v5i2.34878

Abstract

Landslide are natural disasters that often occur in West Java, in 2020 landslides have occurred 852 times. In an effort to prevent the occurrence of rock landslides, it is necessary to study the stability of rock slopes, so it is necessary to evaluate the discontinuity of the rock and take engineering geological. The purpose of this study is to analyze the stability of rock slopes in the study area so that the types of landslides that can occur can be known. Method used is Kinematic Analysis where the object of research is an andesite outcrop located at the northwest foot of Mount Geulis, Cinanjung Village, Jatinangor District. Kinematic analysis is an analysis of the movement of objects without considering the forces that cause them. Various types of slope failure are associated with geological structures that result in a discontinuity plane in the rock body. The results of the study are in the form of determining the potential for landslides that can occur in the research area. Based on the kinematic analysis of the types of failure in the research area that can occur are wedge types in the MT-2, MT-5, and MT-6 segments and toppling types in the MT-3, MT-4, MT-7 segments and Planar failure found in the MT - 1 segment. potential failure in the study area are toppling and wedge with percentage values for the possibility of landslides were obtained, namely: wedge failure is 1.82% - 3.91% and toppling failure is 21.82% - 38.95% and Planar failure is 55.81%
Co-Authors . Hendarmawan Abdurrokhim ⠀ Ali Abdurrahman Alifahmi Alifahmi Dicky Muslim Faisal Akbar Faisal Helmi Gilang Perwira Adi Iyan Haryanto Jodistriawan Ersyari Jordistriawan Ersyari Lizzy Evsa Audrey Mochamad Muslim Taufiq Muhammad Ariq Budipraja MUHAMMAD HERYOGA MATUZA Nur Khoirullah Nur Khoirullah Nur Khoirullah Nur Khoirulloh Reynara Davin Chen Sahala Manullang Sapari Dwi Hadian Siti Khodijah Sondi Kuswaryan Thaha Rizal Ulhaque Ujang Hidayat Tanuwiria Utari Sonya Monica Zufialdi Zakaria Zufialdi Zakaria Zufialdi Zakaria - Zulfialdi Zakaria