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All Journal JOURNAL SCIENTIFIC OF MANDALIKA (JSM) International Journal of Engineering, Science and Information Technology Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Ardhan Ismail
Universitas Mulawarman
Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation Other

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Rekomendasi perencanaan sistem penyaliran pada disposal selatan PT victor dua tiga mega Putri Lufian Tika; Agus Winarno; Ardhan Ismail; Shalaho Dina Devy; Revia Oktaviani
Journal Scientific of Mandalika (JSM) e-ISSN 2745-5955 | p-ISSN 2809-0543 Vol. 7 No. 6 (2026): (in progress)
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/10.36312/vol7iss6pp827-836

Abstract

This study aims to analyze the effectiveness of drainage in the southern disposal pit dump 4 area. It uses a descriptive quantitative method with primary data collection in the form of actual channel conditions and dimensions, as well as flow velocity measurements using the float method. Secondary data includes rainfall data, disposal design, topography, and mine progress maps. The analysis uses the Mononobe method to calculate rainfall intensity, the rational method based on a 10-year return period to calculate planned runoff discharge, and the Manning equation to determine channel capacity. The results of this study indicate that the actual open channel in the disposal area of pit dump 4 south has a discharge of 0.50 m3/s under light rain conditions and a discharge of 1.12 m3/s under heavy rain conditions, and experiences a decrease in hydraulic performance due to erosion on the channel walls and sediment deposition at the bottom of the channel. Therefore, the current channel cannot accommodate and drain the maximum discharge that may occur under extreme conditions. It is recommended that an open channel with a channel capacity of 8.45 m3/s can accommodate a planned runoff discharge of 7.68 m3/s, which indicates that the drainage system is capable of accommodating and draining water safely, efficiently, and sustainably
The Role of the Mining Sector in Regional Economic Development: A Case Study of East Kutai Regency Ardhan Ismail; Dea Mierela Ananda; Agus Winarno; Revia Oktaviani; Arif Setiawan; Rety Winonazada; Supriyanto Supriyanto
International Journal of Engineering, Science and Information Technology Vol 5, No 4 (2025)
Publisher : Malikussaleh University, Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v5i4.1765

Abstract

This study examines the role of the mining sector in East Kutai Regency's regional economic development, where mining contributes over 40% to GRDP. An integrated analytical framework combining Input-Output analysis with overlay analysis techniques (Location Quotient, Klassen Typology, and Shift-Share) was employed to comprehensively assess the mining sector's structural position, inter-sectoral linkages, and development impact. The Input-Output analysis utilized East Kalimantan's 2016 table updated via RAS method to generate regency specific coefficients, while overlay analysis employed GRDP statistics for 2014 to 2023 to evaluate spatial concentration and competitive dynamics. Input-Output findings reveal the mining sector exhibits weak backward linkage of 1.0 and forward linkage of 0.95, positioning it in Quadrant III with minimal inter-sectoral integration and limited multiplier effects on the regional production system. Overlay analysis through Location Quotient demonstrates the mining sector's highest comparative advantage at 1.76, indicating strong export orientation and spatial concentration. However, Klassen Typology classifies it in Quadrant IV as a lagging sector with growth coefficient of 0.94 and contribution coefficient of 0.93, reflecting stagnant development performance. Shift-Share analysis within the overlay framework confirms the mining sector's severe competitiveness decline at negative 35,714.67, the worst among seventeen evaluated sectors. The convergent results from Input-Output and overlay analyses indicate the mining sector operates as an extractive enclave with insufficient value-added generation and constrained developmental spillovers. Enhancing the mining sector's developmental role requires strengthening backward and forward linkages through downstream processing facilities, local content requirements, and technology transfer mechanisms to transform the sector from an extractive enclave into an integrated regional growth driver.
Analisis Pengaruh Kadar Air dan Porositas terhadap Kuat Tekan, Kuat Tarik, dan Kuat Geser pada Batupasir Formasi Balikpapan dan Pulau Balang, Kabupaten Kutai Kartanegara Weggie Atanasius Tonapa; Albertus Juvensius Pontus; Rety Winonazada; Tommy Trides; Ardhan Ismail
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 4 No. 3 (2026): Juni: Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/venus.v4i3.1392

Abstract

Compressive strength, tensile strength, and shear strength are the primary parameters used to evaluate the mechanical capacity of rocks to withstand loads, endure tension, and resist shear forces. The physical property variables believed to influence these mechanical properties are moisture content and porosity. Moisture content and porosity represent the percentage of water and the volume of pores or voids within the rock, expressed in percent (%). Therefore, this study aims to analyze the influence of moisture content and porosity on the mechanical strength of rocks, specifically compressive strength, tensile strength, and shear strength expressed through cohesion (c) and the internal friction angle (ϕ) in the sandstones of the Balikpapan and Pulau Balang Formations. This research employed laboratory testing of physical and mechanical properties on intact rock samples obtained from sandstone outcrops, which were subsequently processed using statistical analysis methods, including linear regression, the coefficient of determination (R2), and the correlation coefficient (r). The results indicate that variations in moisture content and porosity have a highly significant influence and are inversely proportional to the mechanical strength values of the rock. Specifically, higher moisture content and porosity lead to a decrease in the mechanical strength parameters (compressive, tensile, and shear strength) of the sandstones in both formations. This is evidenced by the negative linear trends and correlation/R2 values ranging from 0.96 to 1.
Analisis Pengaruh Perubahan Suhu Batubara terhadap Nilai Total Moisture, Ash content, dan Nilai Kalori Batubara pada Area ROM Coal Stockpile di PT Mahakam Sumber Jaya Indaswati Indaswati; Windhu Nugroho; Albertus Juvensius Pontus; Agus Winarno; Ardhan Ismail
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 4 No. 3 (2026): Agustus : Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/globe.v4i3.1438

Abstract

Coal stacked in stockpiles is directly exposed to sunlight and rain, which can significantly affect coal quality. These enviromental conditions influence the temperature of coal piles, subsequently causing fluctuations in moisture content. This stucdy investigates the effect of coal temperature on coal quality parameters at the ROM Coal Stockpile area of PT. Mahakam Sumber Jaya. Using actual field sampling methods with 30 samples collected form the ROM C HTS (High Total Sulphur) area during November – Desember 2024, coal temperature was measured using a thermogun and quality parameters total moisture, ash content and calorific value were analyzed using ASTM standard. Simple linear regression and correlation analysis were applied for data processing. Result showed that coal temperature has very stong negative correlation with total moisture (r = -0,89), a strong positive correlation with ash content (r = 0,59). The correlation between total moisture and calorific value was strong (r= -0,66). Temperature grouping into three ranges (30-50°C, 50-70°C, and 70-95°C) showed consistent trends: total moisture decreased by 2%, ash content increased by 1%, and calorific value increased by 66 kcal/kg as tempreture rose. These findings suggest that optimal coal tempreture maangement is essential to maintining coal quality during storage .
Co-Authors Agus Winarno Albertus Juvensius Pontus Arif Setiawan Dea Mierela Ananda Indaswati Indaswati Putri Lufian Tika Rety Winonazada Revia Oktaviani Shalaho Dina Devy Supriyanto Supriyanto Tommy Trides Weggie Atanasius Tonapa Windhu Nugroho windhu