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Journal of Earth and Marine Technology (JEMT)
Published by Institut Teknologi Adhi Tama Surabaya
ISSN : -     EISSN : 27238105     DOI : https://doi.org/10.31284/j.jemt
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Physics Transportation
Earth Science and planetary, Geology, Geochemistry, Geophysics, Geodesy, Geomatics, Geotech, Rock mechanics, Mining engineering, Natural Disaster, Land and ocean development, Natural resources, Environmental science, Social impact of mining and marine activity, Science and technology in mapping and surveying, Optical remote sensing and radar remote sensing, Cadastre and 3D modeling, Geodynamics theory and application, Geospatial, Land Surveying, Geomarine, Photogrammetry, Marine engineering
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Ilmu Bumi dan Planet (Lain-Lain)
Articles 176 Documents
 1   2   3   4   5 
Front Matter JEMT Vol 2, No 1 (2021) Editor, Editor
Journal of Earth and Marine Technology (JEMT) Vol 2, No 1 (2021)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Containing Cover, Editorial Board, List of Content, Back Cover including the ISSN barcode
Slope Stability Analysis Based on Safety Factors on Slope CV. Mutiara Timur in Klampok Village, Tongas District, Probolinggo Regency Fanani, Yazid; Astuti, Aprilia Dwi; Paki, Andres Kevi
Journal of Earth and Marine Technology (JEMT) Vol 2, No 1 (2021)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2021.v2i1.2168

Abstract

CV. Mutiara Timur is a company that is applying for a mining business permit for sirtu commodities in Klampok Village, Tongas District, Probolinggo Regency. The planned mining system is open pit mining using the quarry method. From the results of research in the field obtained rock lithology in the form of topsoil, gravel and sand. Where in the slope design later, the topsoil will be peeled off first. The purpose of slope stability analysis is to determine the geometry of the slope by taking into account the safety factor in order to create safe working conditions. Slope stability analysis on CV. Mutiara Timur using the Bishop method using the Slide v6.0 software. Based on the analysis carried out, the recommendation for slope geometry on a single slope is 4 meters high with a slope of 600 so that the no-load safety factor is 1.350 and the safety factor with load is 1.267. In addition, the slope geometry is obtained on the overall slope, which is a total height of 21 meters with a slope of 380 so that the no-load safety factor is 1.243 and the safety factor with the load is 1.239.
Analysis of The Relationship of Shipment Time and Productivity of Drilling Equipment and Transportation, Java Province Purnomo, Eko; Fanani, Yazid; Sari, Avellyn Shinthya
Journal of Earth and Marine Technology (JEMT) Vol 2, No 1 (2021)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2021.v2i1.2172

Abstract

PT. Agung Satriya Abadi is engaged in mining sand and stone which is formed by weathering deposits, located in Wonosunyo village, Gempol District, Pasuruan Regency, East Java. Companies that run in this category of rock mining generally have quite complex problems, one of which is in terms of time management which is considered less attention by some rock mining companies. In this study, several analyzes will be carried out and run the scientific method.The analysis carried out in this study uses statistical methods by displaying mathematical modeling and analysis of the relationship between circulation time and productivity in linear regression analysis. The data values that arise from the use of this mathematical-statistical method are the value (R2) = 0.8597 or 85% of the Doosan Giant Dx 520 Lca, then the value (R2) = 0.8459 or 84% of the Doosan Giant 300 Class, then Hino Ranger 500 Fm 260 Ti paired with Doosan Giant Dx 520 Lca has a value of (R2) = 0.9868 or 98%. And lastly, the Hino Ranger 500 Fm 260 Ti paired with the Doosan Giant 300 Class has a value of (R2) = 0.9886 or 98%.The data generated from each distribution time and productivity relationship from Doosan Giant Dx 520 Lca generates a difference value = 13,031 m3/hour, Doosan Giant 300 Class gives a difference value = 31.347 m3/hour, Hino Ranger 500 Fm 260 Ti against Doosan Giant Dx 520 Lca raises the difference value = 1,659 m3/hour, Hino Ranger 500 Fm 260 Ti against Doosan Giant 300 Class raises the difference value = 1,492 m3/hour.
Productivity Analysis of Raisebore RB-50X for Raise Slot Drilling at Extraction level GBC PT. Freeport Indonesia Kakisina, R J; Cahyono, Yudho Dwi Galih
Journal of Earth and Marine Technology (JEMT) Vol 2, No 1 (2021)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2021.v2i1.2169

Abstract

PT Freeport Indonesia is the largest gold and copper mine in Indonesia, located in Mimika Regency, Papua Province. In its operation, PT. Freeport Indonesia applies two mining systems, namely open pit mining and underground mining. Underground Mine at PT. Freeport Indonesia consists of DOZ, Big Gosan, DMLZ, Kucing Liar, and GBC, with one of the methods applied by PT. Freeport Indonesia is a block caving method. The Grasberg Block Cave mine has entered the production stage since September 2018, but in its operation the GBC Mine is still developing its operational area to meet production targets (development). The development cycle (cycle development), which is the main operation carried out, namely drilling and blasting, loading transporting (mucking hauling), primary support, and secondary support. To support the main operations, it is necessary to have main support consisting of access and area, ventilation, water and water, electricity, pull of tests, surveys, and dewatering. In the blasting process at the drawbell, one free face is needed which functions as the direction of rock collapsing in the blasting process on the drawbell. Making free face or commonly known as slot raise using a rasiebore machine from PT. Redpath for slot raise drilling. Meanwhile, in the drilling stage, the slot raise has a problem that has resulted in delays in the drilling process for the RB-50X raisebore tool. The impact of the delay in making the slot raise resulted in not achieving the production target due to a delay in the blasting process, where the blasting process in the drawbell area functions to break the rock so that it falls and can be transported to the crusher to enter the rock sizing process.
Analysis of The Rock Fracture on Uniaxial Compressive Strength Test Dinoy, Edward; Tampaty, Yohanes Gilbert; Mabuat, Imelda Srilestari; Dwene, Joseph Alexon Sutiray
Journal of Earth and Marine Technology (JEMT) Vol 2, No 1 (2021)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2021.v2i1.2170

Abstract

The compressive strength test is one of the technical properties or compressive strength tests that are commonly used in rock mechanics to determine the collapse point or the elasticity of rock against maximum pressure. The rock collapse point is a measure of the strength of the rock itself when the rock is no longer able to maintain its elastic properties. The purpose of this test is to find out how long the rock maintains its strength or elasticity properties when pressure is applied, and to find out the difference between the strength of compact rock and rock that has fractures when pressure is applied. Rocks that have fractures will break more easily or quickly when pressure is applied compared to compact rocks. This analysis is carried out by comparing the rock strength of each sample, both those that have fractures and compact rocks. To find out these differences, laboratory testing was carried out. The test results show the value (compressive strength test 57.76 MPa), (elastic modulus 5250.000MPa), (Poisson ratio 0.05) and the average value of rock mechanical properties test (axial 0.91), (lateral-0.279), and (volumetric 0.252) . Based on the test results above, it shows that rocks that have fractures will break more easily when pressure is applied, compared to compact rocks that have a long time in the uniaxial compressive strength test.
Technical Planning of Ventilation System to Support Development W Undercut in 2021 at PT. Freeport Indonesia Underground Mining Yudho Dwi Galih Cahyono
Journal of Earth and Marine Technology (JEMT) Vol 1, No 1 (2020)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2020.v1i1.1141

Abstract

Ventilation is an attempt to drain clean air into the mine and remove dirty air out of the mine. The main components of a mine ventilation system are intake, working, and exhaust. Intake is a tunnel and wells system where air flows from the surface into the mine. The purpose of the ventilation system in an underground mine is to provide and drain clean air into the mine for breathing and comfort of mine workers. Based on the Ventilation Design Criteria used by PTFI, the minimum airflow level required for every mine worker is 0.033 m3 / s / worker. Based on PTFI Ventilation Design Criteria, the minimum level in diluting smoke of heavy equipment diesel engine is 5 m3 / min or 0.08 m3 / s / kW. PT Freeport Indonesia is currently developing new underground mines namely Grasberg Block Caving (GBC) and Deep Mill Level Zone (DMLZ) which will be mined using the block caving method.
Analysis of The Relationship of Shipment Time and Productivity of Drilling Equipment and Transportation, Java Province Eko Purnomo; Yazid Fanani; Avellyn Shinthya Sari
Journal of Earth and Marine Technology (JEMT) Vol 2, No 1 (2021)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2021.v2i1.2172

Abstract

PT. Agung Satriya Abadi is engaged in mining sand and stone which is formed by weathering deposits, located in Wonosunyo village, Gempol District, Pasuruan Regency, East Java. Companies that run in this category of rock mining generally have quite complex problems, one of which is in terms of time management which is considered less attention by some rock mining companies. In this study, several analyzes will be carried out and run the scientific method.The analysis carried out in this study uses statistical methods by displaying mathematical modeling and analysis of the relationship between circulation time and productivity in linear regression analysis. The data values that arise from the use of this mathematical-statistical method are the value (R2) = 0.8597 or 85% of the Doosan Giant Dx 520 Lca, then the value (R2) = 0.8459 or 84% of the Doosan Giant 300 Class, then Hino Ranger 500 Fm 260 Ti paired with Doosan Giant Dx 520 Lca has a value of (R2) = 0.9868 or 98%. And lastly, the Hino Ranger 500 Fm 260 Ti paired with the Doosan Giant 300 Class has a value of (R2) = 0.9886 or 98%.The data generated from each distribution time and productivity relationship from Doosan Giant Dx 520 Lca generates a difference value = 13,031 m3/hour, Doosan Giant 300 Class gives a difference value = 31.347 m3/hour, Hino Ranger 500 Fm 260 Ti against Doosan Giant Dx 520 Lca raises the difference value = 1,659 m3/hour, Hino Ranger 500 Fm 260 Ti against Doosan Giant 300 Class raises the difference value = 1,492 m3/hour.
The Relation of Fault Fracture Density with the Residual Gravity; case study in Muria Fajar Rizki Widiatmoko; Ratih Hardini Kusuma Putri; Huzaely Latief Sunan
Journal of Earth and Marine Technology (JEMT) Vol 1, No 2 (2021)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2021.v1i2.1743

Abstract

The usages of the FFD analytical method massively are utilized during the last decade, especially in the geothermal preliminary study that can show the prospect reservoir area. This article discusses the correlation of the FFD value with the residual gravity value that is assumed as an indication of the underneath magmatic body. The correlation of FFD value with residual gravity value is applied in Muria mountain. Muria is classified as the volcano body that contains the magmatic body, also exist Genuk volcano and Patiayam hill around Muria. The correlation shows that FFD value and residual gravity value have a relation, but especially for the uninfluenced by structural activity has a low value of FFD. The correlation of FFD and residual gravity is double-checked with the ground truth data, it showing the proof relation. This way of methodology may use for finding the underneath magmatic body, especially applied to the surface that has not been influenced by structural activity.
Hydrostructure of Groundwater Manifestation of Gedongsongo Geothermal Ungaran, Semarang, Central Java, Indonesia Nazwa Khoiratun Hisan; Ludovikus Damardika Jasaputra; Pius Artdanno Bernaldo; Nur Alif Yusuf Putra Karlina; Arhananta Arhananta
Journal of Earth and Marine Technology (JEMT) Vol 1, No 1 (2020)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2020.v1i1.1150

Abstract

Groundwater is an important element of the hydrological cycle in geothermal systems. The geological structure of the Plio-Pleistocene volcano and different lithological variations affect the type and response of groundwater to rocks. The research area is located around the Gedongsongo Temple complex, Mount Ungaran, Central Java. Based on the field check location, there are three variations of lithology, the first lithology is a breccia with andesite, basalt, and pyroclastic fragments. The NW-SE-oriented geological structure is flattened to the right slip fault which is the fracture aquifer system on the Southern Slope of Mount Ungaran. In the research area, there is an anomaly in the form of deflection of flow direction pattern caused by structural control factor in the form of fracture, the fracture which becomes the fluid channel media is a tension joint on the shear zone with Northwest strike with dip direction toward Northeast which has NW-SE orientation of right slip fault.
Productivity Analysis of Raisebore RB-50X for Raise Slot Drilling at Extraction level GBC PT. Freeport Indonesia R J Kakisina; Yudho Dwi Galih Cahyono
Journal of Earth and Marine Technology (JEMT) Vol 2, No 1 (2021)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2021.v2i1.2169

Abstract

PT Freeport Indonesia is the largest gold and copper mine in Indonesia, located in Mimika Regency, Papua Province. In its operation, PT. Freeport Indonesia applies two mining systems, namely open pit mining and underground mining. Underground Mine at PT. Freeport Indonesia consists of DOZ, Big Gosan, DMLZ, Kucing Liar, and GBC, with one of the methods applied by PT. Freeport Indonesia is a block caving method. The Grasberg Block Cave mine has entered the production stage since September 2018, but in its operation the GBC Mine is still developing its operational area to meet production targets (development). The development cycle (cycle development), which is the main operation carried out, namely drilling and blasting, loading transporting (mucking hauling), primary support, and secondary support. To support the main operations, it is necessary to have main support consisting of access and area, ventilation, water and water, electricity, pull of tests, surveys, and dewatering. In the blasting process at the drawbell, one free face is needed which functions as the direction of rock collapsing in the blasting process on the drawbell. Making free face or commonly known as slot raise using a rasiebore machine from PT. Redpath for slot raise drilling. Meanwhile, in the drilling stage, the slot raise has a problem that has resulted in delays in the drilling process for the RB-50X raisebore tool. The impact of the delay in making the slot raise resulted in not achieving the production target due to a delay in the blasting process, where the blasting process in the drawbell area functions to break the rock so that it falls and can be transported to the crusher to enter the rock sizing process.

Page 3 of 18 | Total Record : 176

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