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Rahmiati
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Jalan Barong Tongkok No.4 Gunung Kelua Samarinda, East Kalimantan Province Indonesia - 75123
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Geosains Kutai Basin
Published by Universitas Mulawarman
ISSN : -     EISSN : 26155176     DOI : https://doi.org/10.30872/geofisunmul.v5i2
Core Subject : Science,
Earth & Planetary Sciences
Coastal and Ocean Dynamics Environmental of Geophysics Geodesy and Geography Geographic Information System Geology Geophysics Exploration Geotechnical/ geo-engineering Hazard Mitigation Hydrology Meteorology and Climatology Mining Engineering Seismology and Volcanology Oceanography
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geofisika
Articles 9 Documents
 1 
Search results for , issue "Vol 3 No 2 (2020)" : 9 Documents clear
IDENTIFIKASI SEBARAN DAN KETEBALAN LAPISAN BATUBARA BERDASARKAN DATA WELL LOGGING DI PT BORNEO EMAS HITAM LOA TEBU KALIMANTAN TIMUR Ernia, Yuyun; Djayus, Djayus; Supriyanto, Supriyanto
GEOSAINS KUTAI BASIN Vol 3 No 2 (2020)
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.v3i2.680

Abstract

The increase of coal demand must followed by the exploration, including distributin and thickness of coal seam. The data that has beeen used in this research was recondary data in the form of Well Logging data (Gammar Ray Log and Density Log) and coring data. Gamma Ray Log and Density Log was interpreted to obtain rock lithology, then processed by using software to obtain. Seread and thickness of coal seam, correlation between boreholes. The result are identification of seread direction, depth and thickness of coal seams bared on. Coal’s distribution analysis at research area, identified area of coal seams distribution. Relative to the southwest and north east. With four coal seams. Three seams having split or branching. Seam A with average thickness value 0,43 m, seam B with average thickness value 0,26 m and seam D with average thickness value 0,24 m. the widest seam distribution was seam A and B while the fewest seam was seam D.
ANALISIS TEKANAN PORI BAWAH PAnalysis of subsurface pore pressure is used to determine the potential problems that can occur in formation. The research purpose to determine sERMUKAAN MENGGUNAKAN METODE EATON PADA SUMUR ELNUSA BERDASARKAN DATA WELL LOGGING Datu, Bonaria; Djayus, Djayus; Natalisanto, Adrianus Inu
GEOSAINS KUTAI BASIN Vol 3 No 2 (2020)
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.v3i2.695

Abstract

Analysis of subsurface pore pressure is used to determine the potential problems that can occur in formation. The research purpose to determine subsurface pressure using the Eaton method and identify potential drilling problems, so prevention can be done to reduce accidents. Research on BD 325 wells is secondary data in the form of resistivity and density log data. Analysis of subsurface pressure is carried out using the Eaton method which results in normal pore pressure and pressure values. Based on the results of graph analysis, the pore pressure value shows the depth interval 3943.9 ft – 3949.1 ft pressure average 5.4 ppg, depth 4407.8 ft - 4417.6 ft pressure average 0.6 ppg, depth 4546.9 ft - 4554.8 ft pressure average 1.4 ppg, depth 4748.3 ft – 4753 ft pressure average 4.8 ppg and depth 5026.5 ft - 5033.7 ft pressure average 4.7 ppg where 5 zones experience subnormal pressure, so it can be concluded that the potential problems can occur lost circulation because the hydrostatic pressure of the mud is greater than the formation pressure which results in loss of drilling mud entering the formation.
STUDI LINGKUNGAN PENGENDAPAN MENGGUNAKAN DATA GEOFISIKA LOGGING DI PT. ADIMITRA BARATAMA NUSANTARA KALIMANTAN TIMUR Tamarindi Rachman Putr, Galih Adenanthera; Supriyanto, Supriyanto; Lepong, Piter
GEOSAINS KUTAI BASIN Vol 3 No 2 (2020)
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.v3i2.691

Abstract

This research conducted at PT. Adimitra Baratama Nusantara which is located in the Balikpapan formation and based on the administrative map of PT. Adimitra Baratama Nusantara is located in Sanga-Sanga, Kutai Kartanegara Regency, East Kalimantan Province. This study uses logging geophysical data in the form of log gammaray and log density where in this logging analysis aims to determine the direction of the spread of the layer by using correlation and to determine the depositional environment at the study site. The results obtained in this study based on logging geophysical data is the correlation of the distribution layer to the northeast and the depositional environment contained is the lower delta plain depositional environment, this is because the characteristics of the lower delta plain depositional environment are thin coal and medium-sized sandstone. . The lower delta plain environment is affected by shallow water when the bay is filled with sediment.
ANALISIS KADAR EMISI TRANSPORTASI DI SAMARINDA BERDASARKAN TIPE MESIN DAN KAPASITAS MESIN Yanti, Derli; Mislan, Mislan; Djayus, Djayus
GEOSAINS KUTAI BASIN Vol 3 No 2 (2020)
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.v3i2.696

Abstract

Transportation emission levels can be analyzed based on the type of engine used. The purpose of this study is to determine the level of vehicle emissions each year and compare in samarinda. This research was conducted by measuring air emissions in different tool brands, the sukyoung SY-GA 401 brand used was the type of injection engine and carburetor, and the AGS-688 brand used was a diesel / diesel engine type where the measurement of the emission levels used the tool Automotive Emission Analyzer. Data was collected at the Kesuma Bangsa, Slamet Riyadi, and Wahid Hasyim points in 2013, 2014, 2015, 2016, 2018 in samarinda region known data on air emission levels, namely: Total pollutants of carbon monoxide (CO), carbon dioxide (CO2), carbon monoxide correction (COcorr), hydrocarbons (HC), oxygen (O2) and lambda (λ). The results showed that the analysis of air emission levels with the highest type of pollutant injection machine, namely HC in 2015 was 107.82 ppm based on the quality standard limits set by LH regulation No 05 of 2006 did not exceed the quality standard threshold of 200 ppm, pollutant carburetors the highest was found in HC pollutants in 2015 amounting to 434.35 ppm exceeding the quality standard threshold of 200 ppm and the highest solar pollutants were in the opacity pollutants in 2015 of 80.28% HSU based on the quality standard threshold stipulated by LH Regulation 05/2006 exceeding the quality standard threshold of 70% HSU.
IDENTIFIKASI LAPISAN PENYEBAB LONGSOR MENGGUNAKAN GROUND PENETRATING RADAR AREA MONUMEN PESAWAT SANGATTA PT. KALTIM PRIMA COAL Marbun, Meyliza Cronika; Supriyanto, Supriyanto; Rinaldi, Aditya
GEOSAINS KUTAI BASIN Vol 3 No 2 (2020)
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.v3i2.692

Abstract

A landslide is an event where a mass of rock, soil or a mixture of rock and soil are moved as a slope. One of the mechanical properties that can be a trigger of landslides is the reduction in rock shear strength. In this research, the authors used the Geophysical method that is Ground Penetrating Radar (GPR), by utilizing different dielectric properties of rocks when given electromagnetic wave propagation to see the amplitude contrast in the recorded data as an approach to the type of rock lithology and rock layers below the soil surface so that it can be used to identify layers that cause landslides. The frequency of GPR that used in this research is 40 MHz. The research aims to determine the type of layer that causes landslides in the area of ​​Sangatta Aircraft Monument, PT. Kaltim Prima Coal. The results of this research are in the form of GPR data which is correlated with the carrying capacity of the soil so that the avalanche causing layer in the study area is sandy clay layer.
ANALISIS RADIASI MEDAN ELEKTROMAGNETIK YANG DITIMBULKAN OLEH TELEPON SELULER BERDASARKAN VARIASI DAYA BATERAI Situmorang, Rosnalia Agnes; Mislan, Mislan; Rinaldi, Aditya
GEOSAINS KUTAI BASIN Vol 3 No 2 (2020)
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.v3i2.697

Abstract

ABSTRACT The research has been conducted on the analysis of electromagnetic field radiation caused by mobile phones. Based on battery power differences. The measurements were made on July 25, 2019, July 26, 2019, July 27, 2019 at the Instrumentation Laboratory at the Faculty of Mathematics and Natural Sciences, Molwarman University, from 8:00 to 16:00. The measurement method used is frequent measurements using the QX-5 electromagnetic field tester on each type of mobile phone, which is already identified. The results showed that the radiation intensity in the three mobile phone brands had radiation intensity values lower than the threshold value of 10 MW / cm 2. From data analysis, it was found that the mobile phone with the highest electromagnetic radiation intensity was the Samsung J2 Prime mobile phone while The smallest phone Vivo Pro 15 Vivo mobile. Mobile phone battery that has the highest value of electromagnetic wave intensity in weak battery power is 25% < DB ≤ 50%, the mobile phone use distance that has the highest electromagnetic radiation intensity is at a distance of 0 cm and 3 cm and a good distance in the use of mobile phone It is 6 cm, 9 cm, 12 cm, the greatest intensity of electromagnetic wave radiation during use or making a phone call whatsapp.
TREN SAMBARAN PETIR CLOUD TO GROUND KOTA BALIKPAPAN TAHUN 2016-2018 Agfanny, Ferruzi; Djayus, Djayus; Supriyanto, Supriyanto
GEOSAINS KUTAI BASIN Vol 3 No 2 (2020)
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.v3i2.693

Abstract

Lightning strikes are very dangerous natural events and can cause significant damage such as fires. Apart from causing lightning strikes, damage can also result in death if contact with living things. Because it is very dangerous, it is necessary to have a reference regarding the level of threat of lightning strikes that occur in the study area. The purpose of this research is to determine the level of lightning threat in the city of Balikpapan in the period 2016 to 2018, to determine the trend or trend of lightning strikes each year. The 2016-2018 lightning strike data obtained from the NexStrom software and Lighting Detector 2000 is a type of Cloud to Ground lightning that is struck directly to the ground and is a lightning hazard for life, then this lightning strike data is processed to find the value of the level of lightning strikes. which occurred in the city of Balikpapan in 2016- 2018. The results of this study found that the average threat level of Balikpapan City lightning strikes and the value of the threat of lightning strikes in 2016-2018.
Analisis Kestabilan Lereng Terhadap Getaran Tanah (Ground Vibration) Akibat Aktivitas Blasting di Pit 10 PT. Alamjaya Bara Pratama Desa Jembayan Maulana, Risky; Djayus, Djayus; Lepong, Piter
GEOSAINS KUTAI BASIN Vol 3 No 2 (2020)
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.v3i2.679

Abstract

This research aims to find out how stable the slopes of the mine are always given ground vibration results from blasting activities. This research was done by estimating the stability of the mine's highwall slope and subsequently given the vibration results from the blasting activity for 30 days using Rocscience SLIDE 6.0 software. The results of this research indicate that the level of ground vibration is too large so that the possibility of landslides on the highwall slopes is very high. So the calculation is done to reducing the amount of ground vibration, one way is to estimate the contents of explosives at a certain distance.
INTERPRETASI KEDALAMAN DAN KETEBALAN LAPISAN BATUBARA DENGAN MENGGUNAKAN METODE WELL LOGGING DI PT LAMINDO INTER MULTIKON SITE BUNYU Sunarti, Sunarti; Supriyanto, Supriyanto; Djayus, Djayus
GEOSAINS KUTAI BASIN Vol 3 No 2 (2020)
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.v3i2.694

Abstract

The purpose of this study was to determine the depth and thickness of coal seams based on gamma ray log and log density. Interpretation of DPG01 drill point at a depth of 45.15 - 58.65 m there is coal with a thickness of 13.5 m, at a DPG04 drill point depth of 30.45 - 43.40 m there is coal with a thickness of 12.95 m, DPE04 drill point a depth of 23.00 - 36.10 m there is coal A with a thickness of 13.1 m, at depth 86.20 - 96.78 m there is coal B with a thickness of 10.58 m, DPE06 drill point depth 34.57 - 44.15 m there is coal A with a thickness of 9.58 m, at a depth of 86.15 - 92.33 m there is coal B with a thickness of 6.18 m, at 100.24 - 105.05 m there is coal C with a thickness of 4.81 m and a drill point DPE07 depth of 49.74 - 65.20 m there is coal A with a thickness of 15.46 m. The results of these interpretations produce an average on each coal seam. In seam A has an average thickness of 12.91 m, seam B has an average thickness of 8.38 m and seam C has a thickness of 4.81 m.

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