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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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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.
Analisis Produksi Logam dari Rencana Rehandle Stockpile Berdasarkan Metode Material Flow dan Model Stockpile Eko Putra Bato Tanete; Aryanti Virtanti Anas; Rini Novrianti Sutardjo Tui
Jurnal Penelitian Enjiniring Vol 20 No 2 (2016)
Publisher : Center of Techonolgy (COT), Fakultas Teknik, Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (245.38 KB)

Abstract

Perencanaan rehandle stockpile merupakan salah satu bagian penting dalam rencana produksi tambang untuk mengetahui informasi mengenai tonase bijih, karakteristik bijih hingga produksi logam dari bijih yang diambil. PT Newmont Nusa Tenggara menggunakan metode material flow untuk mengetahui informasi nilai karakteristik bijih yang ada pada stockpile. Metode ini memiliki perbedaan informasi dengan nilai karakteristik bijih berdasarkan model stockpile. Perbedaan tersebut memengaruhi seluruh perhitungan dalam perencanaan rehandle stockpile. Berdasarkan hal tersebut, maka dilakukan analisis rencana rehandle stockpile tahun 2016, 2017 dan 2018 berdasarkan metode material flow dan model stockpile. Data yang digunakan merupakan data sekunder yang diperoleh dari lembar kerja excel perencanaan jangka panjang BH2016BP_v4.1. Metode material flow menggunakan metode rata-rata tertimbang, sedangkan model stockpile menggunakan boundary pengambilan bijih dari stockpile yang didesain berdasarkan tonase pengambilan bijih per bulan. Berdasarkan pengolahan dan analisis data yang dilakukan, diketahui total produksi logam dari metode material flow pada tahun 2016 diperoleh 234 Mlbs tembaga, 216 Koz emas dan 926 Koz perak. Pada tahun 2017 diperoleh 241 Mlbs tembaga, 235 Koz emas dan 927 Koz perak, dan tahun 2018 diperoleh 168 Mlbs tembaga, 93 Koz emas dan 563 Koz perak. Total produksi logam dari model stockpile pada tahun 2016 diperoleh 233 Mlbs tembaga, 187 Koz emas dan 838 Koz perak. Pada tahun 2017 diperoleh 192 Mlbs tembaga, 117 Koz emas dan 642 Koz perak, dan tahun 2018, 163 Mlbs tembaga, 77 Koz emas dan 482 Koz perak.
Penentuan Laba Pemindahan Material Tanah Penutup untuk Kesetimbangan Biaya Pemindahan Material Lumpur dengan Metode Break Even Point Heicke Gloria Hitipeuw; Aryanti Virtanti Anas; Rini Novrianti Sutardjo Tui
Jurnal Penelitian Enjiniring Vol 22 No 2 (2018)
Publisher : Center of Techonolgy (COT), Fakultas Teknik, Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (625.796 KB) | DOI: 10.25042/jpe.112018.10

Abstract

Cipta Kridatama merupakan anak perusahaan dari PT. ABM Investama Tbk yang bergerak sebagai perusahaan kontraktor pertambangan pada area IUPOP (Izin Usaha Penambangan Operasi Produksi) milik PT. Trisensa Mineral Utama. PT. Cipta Kridatama melakukan aktivitas pengupasan lapisan tanah penutup pada luas wilayah ± 3.414 ha. Proses kegiatan pengupasan tanah penutup sering sekali terjadi ketidaksesuaian hasil produksi aktual di lapangan dengan target yang direncanakan. Salah satu kendala yaitu material lumpur yang menutupi seam target dari Pit 5B21. Produksi perusahaan pada bulan Desember yang direncanakan yaitu sebesar 895.000 BCM. Masalah pemindahan material lumpur menyebabkan produksi aktual tanah penutup pada bulan Desember hanya sebesar 845.262 BCM dan tidak sesuai yang direncanakan oleh perusahaan. Fleet pemindahan material lumpur (mud) pada Pit 5B21 terdiri dari 1 (satu) unit excavator tipe 349DL, 8 (delapan) unit Off Highway Truck tipe 773, 1 (satu) unit bulldozer tipe D9R, dan 1 (satu) unit grader tipe 14M. Tujuan penelitian ini adalah menghitung biaya pemindahan lumpur dan volume tanah penutup yang harus dikupas agar memeroleh laba untuk menutupi biaya pemindahan lumpur tersebut. Analisis titik impas adalah solusi alternatif yang dapat digunakan untuk mengetahui laba yang diperoleh dari pemindahan material tanah penutup yang dapat menutupi biaya pemindahan material lumpur. Data yang digunakan dalam penelitian ini yaitu data biaya bahan bakar, biaya opeasi dan biaya kepemilikan bulan Desember 2017. Hasil analisis menunjukkan bahwa volume tanah penutup yang dapat menghasilkan pendapatan untuk kesetimbangan biaya pemindahan lumpur sebesar US$ 47,109 adalah 238.130 BCM.
KONSTRUKSI MODEL PERSAMAAN UNTUK PREDIKSI BIAYA PRODUKSI PEMINDAHAN LAPISAN TANAH PENUTUP MENGGUNAKAN ANALISIS REGRESI Luviani Aldilla; Aryanti Virtanti Anas; Rini Novrianti Sutardjo Tui; Sidiq Faizal; Mutsammir Mutsammir
Prosiding Temu Profesi Tahunan PERHAPI 2018: Prosiding Temu Profesi Tahunan PERHAPI
Publisher : PERHAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (578.884 KB) | DOI: 10.36986/ptptp.v0i0.32

Abstract

PT. Cipta Kridatama merupakan salah satu perusahaan kontraktor pertambangan di Provinsi Kalimantan Timur yang melakukan aktivitas penambangan lapisan tanah penutup batubara pada area IUPOP (Izin Usaha Penambangan Operasi Produksi) milik PT. Trisensa Mineral Utama (TMU). Kegiatan pemindahan lapisan tanah penutup merupakan salah satu tahapan kegiatan penambangan yang perlu dilakukan agar proses pengambilan batubara dapat terlaksana. Pemindahan lapisan tanah penutup dalam proses pengerjaannya menggunakan alat produksi. Penggunaan alat produksi sangat berpengaruh terhadap ketercapaian produksi dan biaya produksi. Biaya produksi yang dikeluarkanakan berpengaruh terhadap laba yang diperoleh perusahaan. Model persamaan biaya produksi dibutuhkan agar dapat melakukan prediksi terhadap biaya produksi untuk waktu yang akan datang. Data yang digunakan merupakan biaya produksi yang terdiri atas biaya kepemilikan dan biaya operasi bulan Januari 2018 hingga Februari 2018. Tujuan dari penelitian ini adalah menentukan model persamaan biaya produksi. Metode yang digunakan dalam penentuan model adalah analisis regresi. Dari analisis regresi linier sederhana dihasilkan dua model persamaan yaitu Qbp = 49.027,215 + 0,803Dp dengan depresiasi (Dp) sebagai variabel bebas dan Qbp = 43.670,377 + 0,197Bp dengan biaya perbaikan dan perawatan (Bp) sebagai variabel bebas. Model persamaan Qbp = 43.615,936 + 0,006Bbb + 0,221Bp diperoleh dari analisis regresi linier berganda dengan biaya bahan bakar (Bbb) dan biaya perbaikan dan perawatan (Bp) sebagai variabel bebas.
Inisiasi Penerapan Keselamatan dan Kesehatan Kerja Pada Kegiatan Pertambangan Material Konstruksi Di PT Harfia Graha Perkasa, Kabupaten Gowa, Sulawesi Selatan Aryanti Virtanti Anas; Muhammad Ramli; Purwanto -; Asran Ilyas; Rini Novrianti Sutardjo Tui; Rizki Amalia; Andi Arjan
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 4 No 2 (2021): Community Empowerment through Health Awareness in the New Normal
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v4i2.195

Abstract

The implementation of Occupational Safety and Health (OHS) construction materials mining has not been implemented properly, including at PT Harfia Graha Perkasa. The problem faced is the lack of understanding of the importance of OHS and the potential hazards in the mining work environment both in mining, transportation and processing activities. On the other hand, there is a regulation that every mining activity must have an OHS program and standard, so the main purpose of this community service activity is to provide knowledge and understanding of OHS to mining workers. The method used is an OHS promotion program in the form of information dissemination, identification of potential hazards, and risk control efforts. The level of understanding of workers is measured through pre-test and post-test questionnaires given to 12 respondents. Prior to the initiation of the OHS program, only a total of 30% of all OSH questions were known by the workers, but after the program was carried out it was seen that there was a significant increase in the understanding of mining workers to 90%. The information dissemination program showed very good results where 100% of the information on OHS and 90% of the information on risk control efforts was known by the mine workers. This shows that service activities programs can help initiate the implementation and implementation of OHS in partner companies.
Analisis Biaya Konsumsi Bahan Bakar Alat Angkut Menggunakan Teori Antrean di PT. Harfia Graha Perkasa, Kabupaten Gowa Provinsi Sulawesi Selatan Anas, Aryanti Virtanti; Pune, Nataniel Deo; Tui, Rini Novrianti Sutardjo; Amalia, Rizki
Jurnal Penelitian Enjiniring Vol 26 No 2 (2022)
Publisher : Center of Techonolgy (COT), Fakultas Teknik, Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jpe.112022.01

Abstract

PT Harfia Graha Perkasa merupakan perusahaan yang bergerak dalam bidang penyedia jasa pembangunan konstruksi. Material konstruksi yang digunakan dikelola sendiri oleh perusahaan dengan menggunakan stone crusher yang terletak di Desa Bontojai, Kecamatan Parangloe, Kabupaten Gowa, Provinsi Sulawesi Selatan. Produk yang dihasilkan berupa debu batu, split 1/2, dan split 2/3. Proses produksi menggunakan satu unit alat gali muat Kobelco SK-200 yang melayani tujuh unit alat angkut yaitu Hino 500 dan Mitsubishi Fuso 220PS. Pada area loading point dan dumping point yaitu hopper, sering terjadi antrean alat angkut yang menunggu untuk dilayani. Dampak terjadinya antrean yaitu berkurangnya waktu kerja efektif sehingga memengaruhi biaya konsumsi bahan bakar. Oleh karena itu, penelitian ini dilakukan untuk menentukan jumlah alat angkut yang dibutuhkan menggunakan Teori Antrean dan menghitung biaya bahan bakar alat angkut. Diketahui waktu edar aktual alat angkut adalah 55,2 menit dan waktu kerja efektif alat adalah 1,84 jam/hari. Konsumsi bahan bakar Hino 500 adalah Rp433.836,00/bulan dan Mitsubishi Fuso 220PS adalah Rp385.632,00/bulan. Berdasarkan hasil analisis menggunakan Teori Antrean alat angkut dikurangi menjadi empat unit sehingga waktu edar menjadi 16,8 menit. Setelah itu dilakukan pengurangan terhadap waktu hambatan sehingga waktu kerja efektif alat menjadi 7,25 jam/hari dan biaya konsumsi bahan bakar dalam satu bulan Hino 500 sebesar Rp6.115.883,00/unit dan Mitsubishi Fuso 220PS sebesar Rp1.349.712,00/unit. Kombinasi alat angkut dengan biaya konsumsi bahan bakar paling rendah adalah empat unit Mitsubishi Fuso 220PS dengan biaya konsumsi bahan bakar sebesar Rp5.398.848,00/bulan.
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

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

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.
Pelatihan Pembuatan Database Geologi Melalui Aplikasi Surpac Bagi Siswa Jurusan Geologi Pertambangan SMK Penerbangan Techno Terapan Makassar Nur, Irzal -; Ramli, Muhammad; Anas, Aryanti Virtanti; Sutardjo Tui, Rini Novrianti; Amalia, Rizki; A, M. Fadhil Fajar; Lasefeati, M. Alfian
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 6 No 2 (2023): Let us Collaborate for Community Issues
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v6i2.426

Abstract

The creation of a geological database is the initial stage in the mineral estimation process. In this stage, the management and verification of exploration data in the form of borehole data is carried out using a software, one of which is Surpac. Surpac is quite flexible and efficient in meeting the needs of each commodity and mining method. One of the Vocational High Schools that teaches Mining Geology expertise is SMK Penerbangan Techno Terapan Makassar. The curriculum structure of this field consists of general subject groups and vocational subject groups. According to the Regulation of the Director General of Primary and Secondary Education of the Ministry of Education and Culture Number: 07/D.D5/Kk/2018 concerning the Curriculum Structure of Vocational High Schools (SMK)/Madrasah Aliyah Kejuruan (MAK), exploration techniques and mining techniques have the largest proportion in the curriculum structure. This competency requires students to know the characteristics and types of data in exploration activities and the use of technology such as computer programs. Limited access to Surpac software for geological database creation by students of SMK Penerbangan Techno Terapan Makassar causes a lack of knowledge in creating geological databases using Surpac software. The importance of creating a geological database for students of SMK Penerbangan Techno Terapan Makassar is used as a basis by the Department of Mining Engineering through the Laboratory Based Education (LBE) Collaboration program to conduct training on creating a geological database using Geovia Surpac software. The targeted aspect of the training is to increase students' knowledge about the importance of creating a database before estimating as well as introducing the Surpac application. In addition to achieving the target, the service team will later conduct lecture-based training directly to practice the geological database creation tutorial. This training activity also contains the delivery of initial material as well as giving pretests and posttests to measure the extent of students' understanding of database creation and also the Surpac application. The conclusion of this service is that the service carried out can be said to be successful because the results of the pretest and posttest conducted have significant differences where after being given material and also making tutorials, students understand more about the material and also the creation of the database both in terms of quality and quantity of the number of students who answer posttest questions. Based on this, it is recommended to make further training related to software that is often used in the mining world so that it can be a provision for students to enter the world of work.
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

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

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