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Journal of Engineering Science and Technology Applications
Published by CV. Insight Publisher
ISSN : -     EISSN : 29884624     DOI : https://doi.org/10.58227/jesta.v1i1
Core Subject : Engineering,
Engineering
Journal of Engineering Science and Technology Applications (JESTA) E-ISSN 2988-4624 is a peer-reviewed journal that aims to publish and disseminate original research articles on the latest developments in all fields of engineering science and technology applications. The journal publishes original papers contributing to understanding engineering science and improving technology and engineering education. The articles can be theoretical (including computational), experimental, or both. Published by Insight Publisher located in Makassar City, Indonesia. JESTA invites researchers, investigators, and students to contribute their studies and research by submitting original articles and not simultaneously submitting articles to other journals or conferences. The journal covers topics related to engineering fields in bioelectrical engineering, electronic engineering, informatics engineering, computer science, mechatronics engineering, mechanical engineering, automotive engineering, construction engineering, industrial engineering, chemical engineering, mining engineering, environmental engineering, engineering, applied technology, and other engineering fields.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 30 Documents
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Analisis Penentuan Kedalaman Penanaman Pipa Flowline Untuk Mencegah Terjadinya Upheaval Buckling: Analysis of Determining the Depth of Flowline Pipe Planting to Prevent Upheaval Buckling Jamal Rauf Husain; Arif Nurwaskito; Muhammad Syahril
Journal of Engineering Science and Technology Applications Vol. 1 No. 1 (2023): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v1i1.68

Abstract

A force inside a pipe drains fluid from wells producing oil and natural gas. When the power works exceed the pipe's maximum resistance limit, it will cause deformation in the line. This research aimed to evaluate the height of the trench to determine the threshold of tremendous friction force working on the pipe to withstand the axial force, which can cause upheaval buckling. The method used is the calculation of stress analysis. The line of 12 inches measured its style and voltage was planted in the trench with l.5 meters high and 3 meters wide and the soil density of 14.70kN/m3. The data used in the calculation were the design pressure, the outside diameter of the pipe, the minimum melting point of the line, the design factor, the factor of pipe connections, the derating factor, the modulus young, the thermal expansion coefficient, the pipe installation temperature, the maximum operating temperature, the Poisson ratio, the internal pipe pressure, the sectional area of the inner pipe, the pipe cross-sectional area, the depth of pipe planting, the trench width, the value of pipe nondimension, and the soil density of flowline area. The analysis result indicated that the friction force is 356,025.71N/m, and the axial force is 44,927.35N/m. These results showed that the friction force working on the pipe could withstand the axial force working. The cost of making the trench can still be decreased by reducing the height of the track to l m. The excellent friction force in the channel with a size of lm is 252,501.92N/m, where the value is still more significant than the axial force. In conclusion, the friction force working with the trench lm high can still hold the axial force working on the pipe.
Analisis Kebutuhan Alat Angkut Dump Truck HD 985 Pada Kegiatan Long-Haul Pengangkutan SSP: Analysis of the Need for Dump Truck Conveyance Equipment HD 985 in the Long-Haul Activities of SSP Transportation Sri Widodo; Kisman Kisman; Arif Nurwaskito
Journal of Engineering Science and Technology Applications Vol. 1 No. 1 (2023): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v1i1.69

Abstract

Mining activities must always be supported by mechanical equipment that can work optimally to create satisfactory results with minimal cost and effort. Periodic control must also always be carried out because it relates to the company's production target. This research aims to determine the production of the HD985 dump truck conveyance and obtain the amount of lift needed for screening station product (SSP) transportation activities. This research was conducted using data collection methods in the field, discussions with several employees, and existing literature. Then processing is carried out by calculating data from the area using a specific formula and then analyzing the results of the calculations that have been obtained. Based on estimates, it was found that the production of the HD985 dump truck conveyance reached 69.46 tons/hour. And for the number of rides needed with a target tonnage of 1,000 tons, namely 2 units, for a target of 2,000 tons, 4 units are required; for a target of 3,000 tons, 6 units are needed, for a target of 4,000 tons, 8 units are required, for a target of 5,000 tons, 10 teams are needed.
Efisiensi Kerja Pemboran Eksplorasi Pada PT Vale Indonesia: Efficiency of Exploration Drilling Work at PT Vale Indonesia Hasbi Bakri; Alam Budiman Thamsi; Sahabuddin Sahabuddin
Journal of Engineering Science and Technology Applications Vol. 1 No. 1 (2023): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v1i1.70

Abstract

Exploration activities nickel (Ni) which is one of the stages, is where the exploratory drilling work efficiency is one of the main factors that can describe how good a job has been done. The purpose of this study is to analyze the efficiency of exploration drilling. This research method is done by direct observation in the field. The data that was obtained was a record time of any activities during the working day in the form of exploration drilling activity, inserting the inner tube in the core barrel, an empty lap, then taking out further drilling in the core barrel inner tube, prepare the inner tube, add pipes, and re-inserting the inner tube core barrel. There are other activities that the problems of the inner tube not landing. The inner tube can not rise, smoothing supplies drilling, pulling out the pipe, moving the drilling tool and equipment, preparation of drilling, transportation, accessibility, preparatory work crew, safety talk/meeting, checking tool, refueling, wait for dozer, crew return preparations, waiting for a supervisor/geologist, waiting for the crew, weather problems, rest, waiting to go home, repair, and water issues. This study obtained an efficiency increase of 44.43% in drilling work. Concluded the drilling work efficiency is still below the working efficiency standards applied by the company by 50%.
Pembersihan Sumur Gas Pada Produksi Gas Alam: Cleaning Of Gas Wells in Natural Gas Production Agus Ardianto Budiman; Nurul Magfirah; Jamal Rauf Husain
Journal of Engineering Science and Technology Applications Vol. 1 No. 1 (2023): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v1i1.71

Abstract

Natural gas is an alternative energy source in current industrial development, so the demand for natural gas is increasing. The purpose of this research is to activate the function of the well so that it can resume production. The healthy cleaning method used is the clean-up method. This method is a method of removing pressure shut-off fluid in wells by using chokes of various sizes. The type of choke used is a fixed choke. The completeness of the data used is in the form of well testing data on the well, gas composition, and the amount of dead liquid included as a comparison. From the results of research on each well, it is known that in the Walanga#1 well, with 30 barrels of liquid raised and a pressure of 1,080 psi, Walanga#2, with 14 barrels of liquid lifted and a force of 1,080 psi, Walanga#3 with 38 barrels of liquid lifted and a pressure of 1,078 psi, Sampi-sampi # 1 with 80 barrels of liquid raised and a pressure of 1,050 psi. Therefore, based on the results of this study, it can be concluded that the dead liquid was not lifted to its maximum. Still, the pressure in the wells had reached its maximum value and returned to normal conditions so that the four wells could resume production.
Penentuan Lokasi PLTU Ditinjau dari Aspek Fisik dan Geografis Pada PLTU PT Bosowa Energi: Determining PLTU Location from Physical and Geographical Aspects at PT Bosowa Energi PLTU Andi Ashari Cahyadi; Sri Widodo; Arif Nurwaskito; Habibie Anwar
Journal of Engineering Science and Technology Applications Vol. 1 No. 1 (2023): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v1i1.72

Abstract

Choosing the correct and strategic location can make a big profit for the factory. Conversely, the factory can retain if the factory's site selection is strategic. The purpose of this study is To determine the factors in determining the location of the construction of PLTU PT. Bosowa Energy and know the climate parameter of PLTU PT. Bosowa Energy. The stages and methods of research conducted consisted of four steps: the process of research stages, methods of data retrieval, data processing and locations of data analysis, and the set of report generation. The data taken are primary and secondary; after the data is collected, data are analyzed to determine the factors determining PLTU PT location. Bosowa Energy. PLTU PT. Bosowa Energy in Bangkala Subdistrict Kabupate Jeneponto South Sulawesi Province This location has a climate among other air temperature areas ranging between 18,20 - 27,00 ̊C, rainfall area is quite wet, speed and direction of angina average ranged from 2 until 3 knots, Relative air humidity average 64.8 - 83.5%. The conclusions of this journal are the factors in determining the location of the balance of network, industrial areas, and water areas and climate parameters of rainfall, temperature, humidity, and wind speed.
Analisis Unsurfaced Road Condition Index Untuk Kualitas Jalan Tambang PT Antareja Mahada Makmur Kalimantan Timur: Analysis of Unsurfaced Road Condition Index for the Quality of Mining Roads of PT Antareja Mahada Makmur East Kalimantan Halimatussa’diah, Nasyitha; Razak, Supardi; Budiono, Agus
Journal of Engineering Science and Technology Applications Vol. 1 No. 2 (2023): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v1i2.181

Abstract

Overburden stripping is a process of removing overburden to extract the underlying minerals, and is an activity in the early stages of mining. A company that carries out mining activities must carry out stripping activities. The purpose of this study is to analyse the quality of haul roads using the URCI and CBR methods, analyse the obstacles that occur to provide recommendations for improvement, and provide recommendations for the thickness of road layers for overburden haul roads. The research method used is a quantitative method. Road geometry consists of straight road width, bend road width, road slope, superelevation and also crossfall. Based on the test results with the help of dynamic cone penetrometer test, it is known that the CBR value of 6 test points obtained values of 67.5, 42, 59.25, 70.90, 50 and 60, where the limit of good condition of a road based on percent CBR is 55 so that there are 2 roads that are not in good condition. Based on observations using the URCI method with 7 parameters, a value of 65 was obtained for 2 observation locations. Based on the observation results, it is known that in the three rock samples that have been soaked in water for three days, it is known that the material contained in HEX4035 is a material that dissolves quickly in water, resulting in mud. Meanwhile, the material in the mining front of HEX4036 and HEX1440 does not dissolve quickly in water so that the material can be a material for road layers as high as 9 inches for sub base and 7 inches for surface course.
Perbandingan Kadar Endapan Nikel Laterit Pada Front Penambangan Dengan Stockpile Pada PT Ceria Nugraha Indotama: Comparison of Laterite Nickel Deposit Levels on the Mining Front with Stockpile at PT Ceria Nugraha Indotama Ardhana, Muh. Reza; Thamsi, Alam Budiman; Anshariah, Anshariah
Journal of Engineering Science and Technology Applications Vol. 1 No. 2 (2023): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v1i2.182

Abstract

PT Ceria Nugraha Indotama is a company engaged in mining laterite nickel ore in Wolo sub-district, Kolaka district, Southeast Sulawesi province. In lateritic nickel ore mining activities, there is often a difference in levels of laterite nickel ore when it is still in the mining front and after being transferred to the stockpile. This research is to determine the proportion of differences in the levels of Ni, Fe, MgO and SiO2 on the mining front with the stockpile and to determine the factors that influence changes in nickel content. The method used in this study is the grab sampling method in front mining and stockpile. The results of this study are based on the results of the analysis, obtained data on the levels of Ni, Fe, MgO and SiO2 on the mining front with a stockpile, the Ni content has a difference of 0.05% and the Fe content has a difference of 0.34%, the two minerals have the highest grades on the mining front. mining and MgO content has a difference of 2.68% and SiO2 content has a difference of 8.87%, the two minerals have the highest grade in the stockpile. Factors that influence changes in nickel content are the heterogeneous distribution of ore, the position of the waste above the ore and the rainy weather that occurs in the field, operator and sampling skills.
Analisis Karakteristik Aspal Berdasarkan Batuan Reservoir Kabupaten Buton Provinsi Sulawesi Tenggara: Analysis of Asphalt Characteristics Based on Reservoir Rocks in Buton Regency, Southeast Sulawesi Province Sukardin, Sukardin; Widodo, Sri; Nurliah Jafar
Journal of Engineering Science and Technology Applications Vol. 1 No. 2 (2023): Journal of Engineering Science and Technology Applications
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v1i2.183

Abstract

Factors influencing the content of asphalt is the process of formation, moisture content and the type of reservoir rocks, then to do the research on the characteristics of asphalt based on reservoirnya rocks. The purpose of this research is to know the physical nature of Asphalt Buton Rock based on reservoirnya. The method used is the sokhlet method. The data used is data of rocks reservoir site I and II, the physical properties of the data of the asphalt. Of research results obtained at the location I have rocks limestone reservoir with poor porosity features have higher levels of bitumen (23-47%), the asphalt is more dense and hard, CaCO3 content was higher (86,66%) whereas in a location that has a reservoir rock II sandstones with physical characteristics of good porosity have lower levels of bitumen (20-40%), the asphalt is relatively more malleable, a higher SiO2 content (17,06). From the results it can be concluded that the physical nature of asphalt location I have poor porosity and physical properties II location has good porosity, on the location of research levels obtained 20-47%.
Studi Blending Nikel Antara Barging Stockpile Dengan Hasil Aktual Pada PT Ariano Bintang Cemerlang: Study Of Nickel Blending Between Barging Stockpile and Actual Yield at PT Ariano Bintang Cemerlang Bakri, Suriyanto; Gaffar, Abd; Juradi, Muhammad Idris
Journal of Engineering Science and Technology Applications Vol. 1 No. 2 (2023): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v1i2.185

Abstract

PT Ariano Bintang Cemerlang, Kolaka, Southeast Sulawesi, is one of the companies that manages laterite nickel ore into ferronickel (FeNi) products, with a Cut Off Grade (COG) of 1.40% Ni. In the nickel management process, one of the important steps taken is blending. However, in practice, differences are often found between the projected nickel quality of the barging stockpile and the actual results after the blending process. This study aims to analyze the correspondence between the nickel quality at the barging stockpile and the actual results after blending, identify the factors that affect the difference, and provide recommendations for optimizing the blending process. This study uses a quantitative approach to analyze the conformity between the nickel quality at the barging stockpile and the actual results after the blending process. The results of the blending process analysis show that actual blending has a tendency to produce higher elemental levels in some parameters compared to plan blending. The difference between plan blending and actual blending data can be caused by the material in the stockpile, the inaccuracy of material retrieval, the efficiency of the blending equipment and process, the moisture content and condition of the material, the method of analysis and sampling. A more structured management of materials in the stockpile is needed to minimize these differences.
Desain Perencanaan Sequence Penambangan Batubara Short-Term: Short-Term Coal Mining Sequence Planning Design Razvi, Achmad; Razak, Supardi; Haryono, Ahmad Fauzan
Journal of Engineering Science and Technology Applications Vol. 1 No. 2 (2023): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v1i2.186

Abstract

Mine planning activities require analysis to apply the mining sequence to determine the reserve value of the designed mining sequence by considering the ultimate pit limit to match the targeted reserve and economic value. The designed pit limit will be divided into smaller units that consider the recommended stripping ratio value from the company. In the study, 2 PC-800 tools were selected with a month's production value of 274,176 Bcm for overburden excavation and 1 PC-200 with a month's production value of 42 Bcm. 1 PC-200 with a production value for a month of 42,389.57 tonnes for coal excavation. coal excavation, then volume calculations were carried out using the block model method. The results of overburden volume from this study in mining sequence 1, 2, 3, 4. mining sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 respectivel are (274,093; 274,129; 273,997; 273,754; 273,649; 274,138; 273,710; 274,176; 274,142; 274,176; 274,176; 274,043) Bcm. For the results of coal volume in mining sequences 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 are (785.2; 17,420; 41,873; 41,684.5; 26,299; 34,938.8; 41,967.9; 42,389.1; 42,389.1; 42,217.5; 42,387.8; 42,389.1) tonnes respectively.

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