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All Journal Jurnal Ilmiah Mahasiswa Teknik Kebumian Jurnal Sains dan Teknologi Reaksi Aceh International Journal of Science and Technology Jurnal Industri dan Inovasi (INVASI) PESARE: Science and Engineering Service Journal JURNAL REKAYASA KIMIA & LINGKUNGAN PESARE: Jurnal Pengabdian dan Rekayasa
Hendra Harisman
Universitas Syiah Kuala
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Public Health Transportation

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Kajian Biaya Produksi Pemindahan Material Batu Gamping dari Room of Material ke Crusher di PT Lafarge Cement Indonesia, Lhoknga, Aceh Besar Devi Pratiwi; Hendra Harisman
Journal of Geoscience, Mining Engineering, and Technology Vol 1, No 1 (2017): Jurnal Ilmiah Mahasiswa Teknik Kebumian
Publisher : Journal of Geoscience, Mining Engineering, and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (568.508 KB)

Abstract

PT Lafarge Cement Indonesia sebagai perusahaan penghasil semen, mempercayakan proyek penambangan batugampingnya pada PT Macmahon Indonesia dengan target produksi 6000 ton/hari. Namun, karena adanya permasalahan pada crusher, adanya hari libur nasional dan sebagainya yang menghambat tercapainya target produksi, maka PT Lafarge Cement Indonesia menyewa satu unit wheel loader milik PT Macmahon Indonesia dengan tipe CAT 992D atau dua unit wheel loader milik PT Meugah Asai Kana dengan tipe CAT 966D dan CAT 980C untuk melakukan proses pengangkutan batugamping dari Room of Material menuju crusher agar target produksi yang telah ditetapkan dapat tercapai. Setelah dilakukan penelitian, diperoleh biaya produksi dengan pengoperasikan wheel loader CAT 992D lebih tinggi dibandingkan wheel loader CAT 966D dan CAT 980C meskipun total produksi dengan mengoperasikan wheel loader CAT 966D dan CAT 980C lebih tinggi. Sehingga dapat disimpulkan bahwa pengoperasian wheel loader CAT 966D dan CAT 980C lebih menguntungkan dibandingkan dengan pengoperasian wheel loader CAT 992D.
Analisis Perbedaan Nilai Supply Overburden dari Truck dan Pit Crushing and Conveying (PCC) Pada Pit South Tutupan Periode Oktober – Desember 2016 di PT. Adaro Indonesia, Kalimantan Selatan Teuku Raja Istiqhafar Surya; Haqul Baramsyah; Hendra Harisman
Journal of Geosciences, Mining Engineering, and Technology Vol 6, No 2 (2022): Jurnal Ilmiah Mahasiswa Teknik Kebumian
Publisher : Jurusan Teknik Kebumian Fakultas Teknik Universitas Syiah Kuala

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Abstract

AbstractPT. Adaro Indonesia is a coal mining company in Indonesia which implements Pit Crushing and Conveying (PCC) for overburden removal. The implementation of the PCC due to overburden removal combines shovel and truck, crusher, and conveyor in the operating system. Trucks are needed as a supplier of overburden to pit crusher station of the PCC. By implementing this system, there has been a difference (deviation) between the value of overburden supplied by truck and the value of overburden received (detected) by PCC. Based on the issue, an analysis is needed to minimize the deviation and to determine the accuracy of deviation supply of truck and PCC. This research was conducted to solve the problem by observing and analysing the factors that cause the difference (deviation) of the overburden supply value. The results of this research defines that the value of overburden received (detected) by PCC is generally higher than the value of overburden supplied by truck with a deviation in the range of 11% to 37%. The deviation can be minimized by using the density value corresponding to the overburden, by changing the calculation method of truck production and PCC production, and by establishing the accuracy deviation supply to truck and PCC.
Developing a Computer Simulation Game as a Training Tool for Mine Self-Escape in Underground Coal Mine Hendra Harisman; Phillip Stothard; Nurul Aflah
Aceh International Journal of Science and Technology Vol 10, No 1 (2021): April 2021
Publisher : Graduate Program of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (717.699 KB) | DOI: 10.13170/aijst.10.1.18752

Abstract

– Gaming technology has been growing these years rapidly. The game engines have the capability of creating a very realistic virtual environment model. This technology can also be used for mining purposes. In this research, the game engine is specifically used to develop a mine self-escape simulation game for training purposes. The game engine which is used to develop the simulation game is Unreal Engine 3. The main advantage of using such a simulation game as a training tool is because it allows the trainee to experience a dangerous situation while not being put in danger. This kind of training is considered better than conventional briefing, normally conducted by showing a video or pamphlet. Studies have shown that people retain more information when they are involved interactively in the learning process. In this research, a computer simulation game as a training tool for underground coal mine self-escaped has been successfully created using fire scenarios. The player/trainee should follow some procedures to get to the safety zone
Soil Quality Investigation of an Abandoned Mine Area Using Geochemical and Geospatial Approach in Jantang Village Nurul Aflah; Mulkal Mulkal; Muchlis Muchlis; Hendra Harisman; Alisastromijoyo Alisastromijoyo; Mirna Rahmah Lubis; Jessica Anggraini
Aceh International Journal of Science and Technology Vol 11, No 1 (2022): April 2022
Publisher : Graduate Program of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (898.266 KB) | DOI: 10.13170/aijst.11.1.23323

Abstract

The physical and chemical environmental impact in a mining area is inevitable, particularly for open pit mining areas. The impact could affect soil and water quality where mining activities, such as land clearing, blasting and hauling, occur. Thus, environmental monitoring in mining areas should be taken to measure the impact of mining activity for reclamation purposes. The objective of this research focuses on the measure of environmental impact on soil quality in terms of the nutrient content in an abandoned mine area at Jantang village, Lhoong, Aceh Besar. The research was conducted by collecting 15 soil samples, followed by laboratory analysis using atomic absorption spectrophotometry to investigate sampled 'soil's nutrients which are pH, Carbon (C-organic), Nitrogen (N-total), Phosphor (P-availability), and Ferro substance (Fe-concentration). In addition, to estimate the soil properties at locations outside the sampling area, a spatial interpolation method called inverse distance weight with an optimum power was used. The result shows that the soil is acidic, with low C-organic in the range of 0.02%–1.84%, N-total 0.02%–0.16%, and P-availability 0.55%–3.75%. In contrast, the Fe-concentration is very high, at 3000–3400 ppm.
Soil Quality Investigation of an Abandoned Mine Area Using Geochemical and Geospatial Approach in Jantang Village Aflah, Nurul; Mulkal, Mulkal; Muchlis, Muchlis; Harisman*, Hendra; Alisastromijoyo, Alisastromijoyo; Lubis, Mirna Rahmah; Anggraini, Jessica
Aceh International Journal of Science and Technology Vol 11, No 1 (2022): April 2022
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.11.1.23323

Abstract

The physical and chemical environmental impact in a mining area is inevitable, particularly for open pit mining areas. The impact could affect soil and water quality where mining activities, such as land clearing, blasting and hauling, occur. Thus, environmental monitoring in mining areas should be taken to measure the impact of mining activity for reclamation purposes. The objective of this research focuses on the measure of environmental impact on soil quality in terms of the nutrient content in an abandoned mine area at Jantang village, Lhoong, Aceh Besar. The research was conducted by collecting 15 soil samples, followed by laboratory analysis using atomic absorption spectrophotometry to investigate sampled 'soil's nutrients which are pH, Carbon (C-organic), Nitrogen (N-total), Phosphor (P-availability), and Ferro substance (Fe-concentration). In addition, to estimate the soil properties at locations outside the sampling area, a spatial interpolation method called inverse distance weight with an optimum power was used. The result shows that the soil is acidic, with low C-organic in the range of 0.02%1.84%, N-total 0.02%0.16%, and P-availability 0.55%3.75%. In contrast, the Fe-concentration is very high, at 30003400 ppm.
Developing a Computer Simulation Game as a Training Tool for Mine Self-Escape in Underground Coal Mine Harisman*, Hendra; Stothard, Phillip; Aflah, Nurul
Aceh International Journal of Science and Technology Vol 10, No 1 (2021): April 2021
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.10.1.18752

Abstract

Gaming technology has been growing these years rapidly. The game engines have the capability of creating a very realistic virtual environment model. This technology can also be used for mining purposes. In this research, the game engine is specifically used to develop a mine self-escape simulation game for training purposes. The game engine which is used to develop the simulation game is Unreal Engine 3. The main advantage of using such a simulation game as a training tool is because it allows the trainee to experience a dangerous situation while not being put in danger. This kind of training is considered better than conventional briefing, normally conducted by showing a video or pamphlet. Studies have shown that people retain more information when they are involved interactively in the learning process. In this research, a computer simulation game as a training tool for underground coal mine self-escaped has been successfully created using fire scenarios. The player/trainee should follow some procedures to get to the safety zone.
SLOPE STABILITY ANALYSIS OF DISPOSAL AREA WITH GROUNDWATER TABLE AND MATERIAL DENSITY VARIATIONS USING THE BISHOP METHOD Oziana, Deea Rizki; Ramadhandi, Farhan; Hulwani, Zati; Harisman, Hendra; Alam, Pocut Nurul
Jurnal Sains dan Teknologi Reaksi Vol 23, No 01 (2025): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v23i01.7365

Abstract

Slope stability is crucial in mining activities, particularly in disposal areas composed of loose materials with varying geotechnical conditions. Groundwater level and material density are significant factors that influence slope stability. This study aims to analyze the effects of groundwater level variations and material density on the safety factor of disposal slopes using the Bishop method within the GeoStudio SLOPE/W software framework. The research was conducted in a coal mine disposal area, divided into three cross-sections: A–A’, B–B’, and C–C’. Simulations were performed under three conditions: unsaturated (normal), saturated (due to intense rainfall), and threshold (the maximum critical condition still considered stable). The results show that rising groundwater levels significantly reduce the slope’s safety factor (SF). Under saturated conditions, the SF for all three cross-sections dropped below 1.0, indicating unstable slopes. Specifically, the SF declined from 1.15 to 0.72 for section A–A’, from 1.16 to 0.55 for B–B’, and from 1.18 to 0.81 for C–C’. In contrast, an increase in wet material density led to only moderate reductions in SF, with values remaining above 1.0. The combination of high groundwater levels and increased material density poses a critical risk factor for potential slope failure. Continuous hydrogeological monitoring is therefore essential to ensure the long-term stability of mine disposal areas. Keywords: slope stability, groundwater table, material density
Penyelidikan Struktur Bawah Permukaan di Kawasan Lam Cot, Kecamatan Darul Imarah, Aceh Besar Dengan Menggunakan Metode Geolistrik 1D Aflah, Nurul; Harisman, Hendra; Muchlis, Muchlis; Lubis, Mirna Rahmah; Pramana, Agus Hari
PESARE: Jurnal Pengabdian Sains dan Rekayasa Vol 2, No 2 (2024): Juni 2024
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/pesare.v2i2.38666

Abstract

Ketersediaan air tanah yang memadai menjadi krusial seiring dengan pertumbuhan populasi manusia. Artikel ini mengungkapkan studi tentang keberadaan sumber air tanah alternatif di Kawasan Lam Cot, Aceh Besar. Metode geolistrik resistivitas digunakan untuk mengidentifikasi kedalaman lapisan akuifer dan potensi sumber air tanah dalam. Pengukuran dilakukan pada satu titik pengukuran dengan penggunaan resistivitimeter SuperSting R8/IP. Hasil pengukuran resistivitas semu menunjukkan variasi nilai antara 0,5 hingga 193,2 m dengan kedalaman berkisar 0 hingga 140 meter. Identifikasi keadaan litologi di bawah permukaan menunjukkan adanya tanah lempung, lanau, batuan kerikil, dan batu pasir dengan nilai resistivitas yang berbeda pada kedalaman tertentu. Meskipun akuifer tidak ditemukan dalam jangkauan pengukuran, penelitian ini memberikan pemahaman yang mendalam tentang kondisi hidrogeologi kawasan tersebut. Diperlukan studi lanjutan dengan pengukuran yang lebih luas untuk mendapatkan informasi yang lebih komprehensif tentang sumber air tanah di Kawasan Lam Cot.
Mapping the Spread of Mercury from Artisanal Mining Activities in Aceh Jaya through Geochemical Surveys Aflah, Nurul; Mulkal, Mulkal; Aslam, Izzan Nur; Muchlis, Muchlis; Harisman, Hendra
Jurnal Rekayasa Kimia & Lingkungan Vol 18, No 1 (2023): Jurnal Rekayasa Kimia & Lingkungan (June, 2023 )
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v18i1.28180

Abstract

Illegal gold mining carried out using amalgamation techniques produce mercury waste which can then damage the environment and damage the health of residents. The negative impact due to the use of mercury is dead fish, contaminated river water, water quality below environmental standard quality and spreading in the food chain. This has caused environmental damage, one of which is in terms of land and water. This condition is the basis for conducting deeper research on environmental damage by mercury waste, especially in terms of soil and water. The sampling method used is the Geochemical Method and Geoelectric Method. Geoelectric samples were taken using the superstring R8 tool. Geochemical samples used were soil and water samples which were subsequently tested by the Atomic Absorption Spectrophotometry (AAS) and X-ray Fluorescence (XRF) methods to see the mercury levels that had been scattered in the research location. The study aims to determine the distribution of mercury waste and its levels. This research includes sampling, sample testing, data processing and analysis, and making maps of the distribution of mercury waste through QGis software. From the study, it was found that the distance from the traditional gold mining processing location determines the concentration level (Hg). Analysis using AAS shows that there were 13 samples had mercury concentrations above the critical threshold. From the analysis, it is also known that AAS could not detect mercury levels in soil samples which is different from the results obtained using XRF.
Business Strategy Adaptation amid Industry Dynamics and Energy Transition: Evidence From PT Merdeka Copper Gold and Pt Indika Energy Hulwani, Zati; Oziana, Deea Rizki Rizki; Arsianda, M Nazwa; Harisman, Hendra; Muchlis, Muchlis; Mutia, Febi
Jurnal Industri dan Inovasi (INVASI) Vol 3, No 1 (2025): Vol 3, No 1 (September 2025)
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/invasi.v3i1.14716

Abstract

Business strategy is a critical factor for companies in responding to industrial challenges. This study aims to analyze the strategies implemented by PT Merdeka Copper Gold Tbk and PT Indika Energy Tbk, particularly in the areas of human resources, finance, production, and marketing. Using a SWOT analysis framework, this research highlights how both companies adapt to dynamic market conditions. The results indicate that PT Merdeka Copper Gold places greater emphasis on production expansion and mineral diversification, particularly in gold, copper, and nickel, while PT Indika Energy focuses more on energy transition from coal toward green energy and electric vehicles. From a financial perspective, both companies face challenges in the form of declining net profit despite an increase in total assets. In terms of marketing strategy, PT Merdeka Copper Gold optimizes domestic and global market expansion, whereas PT Indika Energy adopts a more aggressive approach to business diversification. In conclusion, although the two companies demonstrate different business strategy orientations, both remain committed to achieving sustainable growth.
Co-Authors Adriman, Ramzi Agus Hari Pramana Alisastromijoyo Alisastromijoyo Alisastromijoyo, Alisastromijoyo Anggraini, Jessica Arsianda, M Nazwa Devi Pratiwi Febi Mutia Haqul Baramsyah Hulwani, Zati Izzan Nur Aslam Izzan Nur Aslam Jessica Anggraini M Muchlis Mirna Rahmah Lubis Muchlis Muchlis Muchlis Muchlis Muchlis Mulkal Mulkal Mulkal, Mulkal Mutia, Febi Nurul Aflah Nurul Aflah Nurul Aflah Oziana, Deea Rizki Oziana, Deea Rizki Rizki Phillip Stothard Pocut Nurul Alam Pramana, Agus Hari Ramadhandi, Farhan Stothard, Phillip Teuku Raja Istiqhafar Surya