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All Journal Jurnal Geocelebes Indonesian Physical Review Journal of Technomaterial Physics
Ansory, Andre Rahmat Al
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Astronomy Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Delineation of Coal Identification Using Inversion Microtremor and Borehole at PT X Rahmawati, Nurul Ilmi; Refrizon, Refrizon; Kusuma, Budi Praba; Ansory, Andre Rahmat Al; Syah, M. Taufiqqurahman; Anggria, Della Cici; Triutami, Olga
Journal of Technomaterial Physics Vol. 6 No. 1 (2024): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v6i1.16077

Abstract

Coal is a natural resource composed of organic and inorganic materials. The potential of coal is one of the national and world resources. Microtremor method is a geophysical exploration method that utilises microseismic waves to identify the presence of hydrocarbons. Microtremor data processing is processed first using Geopsy software to obtain the H/V curve which will then be processed using Hv-Inv software to obtain the Vs value. Microtremor data is correlated with data from the borehole, the coal seam thickens to the southwest. Similarly, with the correlation results of other microtremor cross sections, the cross section shows that the coal seam is thickened and continuous to the west or southwest. This is further strengthened by the existence of boreholes as a correlation of coal Vs value data in the range of 613.37 m/s-887.70 m/s. Other constituent materials such as soil,claystone, sandstone, carboneseus. Based on the Vs value of the 1D model, it is known that the research area shows the distribution of coal at a depth of 53.5-76 metres. The coal layer in the study area is bituminous to sub-bituminous coal.
IDENTIFICATION OF AQUIFERS BASED ON THE VERTICAL ELECTRICAL SOUNDING (VES) METHOD SCHLUMBERGER CONFIGURATION CASE STUDY: PULAU BAAI KAMPUNG MELAYU SUB-DISTRICT, BENGKULU CITY, INDONESIA Rafly, Tegar Al; Refrizon, Refrizon; Hadi, Arif Ismul; Ansory, Andre Rahmat Al; Raihana, Hana
Indonesian Physical Review Vol. 8 No. 1 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i1.333

Abstract

Investigation of the groundwater potential in the Pulau Baai area, Kampung Melayu Sub-district, Bengkulu City, must be carried out in such a way that the activities and needs of the people in the area can be fulfilled and the needs of the population in the area can be met. This study aims to determine the status of groundwater using the Schlumberger configuration geoelectric method. Measurements were made using a resistivity meter, and the results for each configuration depended on changes in resistivity. Measurements for each configuration depend on changes in resistivity at depth, the vertical direction (sounding), and the lateral direction (mapping), so hydrogeological analysis in this activity aims to get the maximum use of groundwater / underground water in aquifers for raw water needs. The dominant rock structures in the study area are clay, alluvium, siltstone, and sandstone, as well as some rocks with suitable porosity and permeability as water carriers, such as sand and gravel. However, what appears to have considerable potential is that groundwater is found at depths of 4-53 meters in VES 1, VES 2, VES 3, VES 5, and VES 10. The results of the analysis show that the location of the Pulau Baai, Kampung Melayu Sub-district, Bengkulu City Priority Utilization Area is within the groundwater storage area, so it can be used to meet the raw water needs of the study area.
Mapping of Soil Stability based on Shear Wave Velocity Values (Vs30) Using the Multichannel Analysis Surface Wave (MASW) Method on Kalimantan Highway, Rawa Makmur Village, Bengkulu City Putri, Aisyah Cindy Phylia; Refrizon, Refrizon; Hadi, Arif Ismul; Ansory, Andre Rahmat Al
JURNAL GEOCELEBES Vol. 9 No. 1: April 2025
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/geocelebes.v9i1.34956

Abstract

Kalimantan Highway in Bengkulu is a heavily traveled route and the main gateway to Bengkulu City from northern areas such as Arga Makmur and Ketahun sub-district, or Mukomuko regency also surrounding areas. Geological formations in the form of alluvium terraces (Qat) cause soil instability, often damaging the road surface. These include the formation of potholes and the occurrence of puddles during heavy rains. This research aims to determine the bearing capacity (stability) of the soil layer along Kalimantan Highway section in Rawa Makmur Village, Muara Bangkahulu District, and provide planning information through mapping. It is imperative to assess the condition of the soil layer. This research uses geophysical methods, specifically the Multichannel Analysis of Surface Wave (MASW) technique, using a MASW PASI 16S24-P digital seismograph to image subsurface soil conditions by analyzing shear wave velocity (Vs). A total of 20 data points were collected along the Kalimantan Highway section. The results of the Vs profile analysis were interpreted into soil classifications based on the criteria set out in SNI 1726:2019. The majority of the road sections were classified as SE (soft soil) and SD (medium soil), with some points designated as SC (hard soil/soft rock). This indicates that the geotechnical design for these road sections should consider supporting factors to maintain structural safety and stability.
Co-Authors Anggria, Della Cici Arif Ismul Hadi Kusuma, Budi Praba Putri, Aisyah Cindy Phylia Rafly, Tegar Al Rahmawati, Nurul Ilmi Raihana, Hana Refrizon Refrizon Syah, M. Taufiqqurahman Triutami, Olga