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All Journal Journal TEPAT: Teknologi Terapan untuk Pengabdian Masyarakat Prosiding Temu Profesi Tahunan PERHAPI EPI International Journal of Engineering Jurnal Penelitian Enjiniring Fakultas Teknik Unhas
Rini Novrianti Sutardjo Tui
Departemen Teknik Pertambangan, Fakultas Teknik, Universitas Hasanuddin
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Public Health

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Journal : EPI International Journal of Engineering

 1 
Evaluation of Achievement of Overburden Production Target Using Fishbone Diagram Method at Pit A Site B PT XYZ, South Sumatera Province Aurah Masyitha Ayu Namira; Aryanti Virtanti Anas; Rizki Amalia; Rini Novrianti Sutardjo Tui
EPI International Journal of Engineering Vol 4 No 2 (2021): Volume 4 Number 2, August 2021
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/10.25042/epi-ije.082021.08

Abstract

PT XYZ is one of the companies engaged in the coal mining and energy in South Sumatra Province. Mining activities at the Pit A are still focused on stripping overburden using the Komatsu PC-3000E power shovel digging tool. The company has established a 513,333 BCM production target of overburden stripping in November 2020. While the total overburden production obtained is 488,162 BCM. The existence of factors that affect the productivity of the tool will determine the achievement of production targets, so it is necessary to evaluate production by identifying the factors causing the problem. One of method that can be used to determine the root cause of the problem is by using a fishbone diagram. A Fishbone diagram is a method used to identify the root cause of a quality problem. The purpose of this research is to calculate overburden production in November 2020, identify factors that influence the achievement of overburden production targets using a fishbone diagram, and make recommendations for improvement plans based on factors that affect the achievement of overburden production targets. Based on the results of the fishbone diagram analysis using the 4M pattern consisting recommendations for improvement plans can be designed for each factor causing the problem which is machine, methods, materials, and manpower.
Mine Scheduling of Lateritic Nickel Ore in The Mawar Block of PT Ang and Fang Brother Site Lalampu, Central Sulawesi Province, Indonesia Anas, Aryanti Virtanti; Syaifullah, Nanda Syafriana; Amalia, Rizki; Sutardjo Tui, Rini Novrianti
EPI International Journal of Engineering Vol 7 No 1 (2024): Volume 7 Number 1, February 2024
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022024.03

Abstract

PT Ang and Fang Brothers planned to open a new pit of lateritic nickel ore in Mawar Block. Mine scheduling of open-pit mines is an important thing in surface mine planning so the purpose of this research is to provide an overview of pit design and mining sequences, amount of production and number of equipment allocated in each sequence. The production targeted by the company was 50,000 tons by considering the mine recovery factor of 90%. Mine scheduling requires several data, namely cycle time, loss time, block model, equipment specifications and availability, slope and mine haul road geometry, and topography. The data used to design pit limits, mining sequences, and production scheduling. Based on the design of the mine pit, the total overburden that must be removed is 365,589 bcm and the total laterite nickel ore that must be stripped is 169,240 tons with a stripping ratio of 2.2:1 which is divided into three mining sequences. Total tonnage of lateritic nickel ore in the first to the third sequence is 55,677 tons, 55,518 tons, and 58,045 tons with overburden of 143,764 bcm, 136,055 bcm, and 85,770 bcm respectively. The equipment fleet of the first to the third sequence is 4 units’ loader with 17 units’ hauler, 4 units’ loader with 17 units’ hauler, and 3 units’ loader with 13 units’ hauler respectively.
The Export Potential of Mining Commodities of Indonesia Tui, Rini Novrianti Sutardjo; Anas, Aryanti Virtanti; Amalia, Rizki; Adachi, Tsuyoshi
EPI International Journal of Engineering Vol 5 No 2 (2022): Volume 5 Number 2, August 2022
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

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Abstract

The implementation of the export ban of the raw mineral commodities is one of the implications brought by the Mining Law Number 3 of the year 2020. The high contribution of the raw mining commodities towards the economy of Indonesia plays dual sides of a coin. First, it is seemingly more beneficial to increase the value of the raw commodities by processing and refining them first domestically. Then, as the raw commodities contribute largely, banning the export surely will bring a change towards the economy. Change in government’s regime initiate the review of the export ban. This research utilizes Herfindahl Hirschman Index and Revealed Comparative Advantage (RCA) to investigate how export ban can affect the economy growth. In analyzing the impact of the export ban, the very basic foundation is examining the export potential of the mining commodities. Analyzing the ores, metals, and minerals as export commodities, the ores and minerals seemingly are the prominent export commodities. Proved by the RCA index value, the government of Indonesia has a strong foundation to release the export ban. Additionally, the HH Index of market concentration indicates that the export trade of Indonesia is relatively independent towards its trading partner. Therefore, as the government of Indonesia sets to implement the export ban policy, this change in trade barriers is unlikely will disrupt the trade relations between Indonesia and its trading partners.
Evaluation of Articulated CAT 745 Fuel Ratio Based on Haul Road Geometry at PT Hillconjaya Sakti Site PT Adhi Kartiko Pratama Tbk Anas, Aryanti Virtanti; S, Wahyuni; Sutardjo Tui, Rini Novrianti; Amalia, Rizki
EPI International Journal of Engineering Vol 8 No 1 (2025): Volume 8 Number 1, Februari 2025
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

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Abstract

The distance for transporting overburden at PT Hillconjaya Sakti reaches hundreds of meters. Based on actual conditions, Articulated CAT 745 queues often occur on certain haul road segments due to unsuitable haul road conditions so the fuel ratio value is in the low performance category. The purpose of this study is to evaluate the fuel ratio value and provide recommendations for improving the geometry of haul roads to meet the established fuel ratio value standards. Multiple linear regression analysis using Eviews 12 VS was used to determine the variables that significantly affect the fuel consumption of hauler based on haul road geometry. Road grade, total resistance, travel time and speed of the hauler are independent variables, while fuel consumption is the dependent variable. Based on the results of data processing, a fuel ratio value of 1.85 was obtained and the parameters that had a significant effect on fuel consumption were total resistance and travel time. Improvement of haul road conditions based on ESDM Decree No. 1827 K/30/MEM/2018 and AASHTO Manual Rural High Way Design. The fuel ratio value after repairs decreased to 0.60 and was in the best performance category based on PT Hillconjaya Sakti's standard fuel ratio value.
Co-Authors ., Sufriadin A, M. Fadhil Fajar Adachi, Tsuyoshi Aditya, Dzulkifli Alvionita, A. Febbi Andi Arjan Aryanti Virtanti Anas Asran Ilyas Aurah Masyitha Ayu Namira Eko Putra Bato Tanete Gunawan, Syahrul Hatta, Asta Arjunoarwan Heicke Gloria Hitipeuw Irzal Nur, Irzal Lasefeati, M. Alfian Luviani Aldilla Muhammad Ramli Muhammad Ramli Mutsammir Mutsammir Nur, Irzal - Pune, Nataniel Deo Purwanto - Purwanto . Rizki Amalia Rizki Amalia Rizki Amalia S, Wahyuni Sidiq Faizal Sri Widodo Syaifullah, Nanda Syafriana