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All Journal PROSIDING SEMINAR KIMIA JURNAL REKAYASA TEKNOLOGI INFORMASI INTAN Jurnal Penelitian Tambang Teknologi Sipil : Jurnal Ilmu Pengetahuan dan Teknologi Journal of Sustainable Transformation Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Venus: Jurnal Publikasi Rumpun Ilmu Teknik Jurnal Teknologi Sumberdaya Mineral
Ardhan Ismail
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EVALUASI PEMECAH GELOMBANG PANTAI MANGGAR BARU Devedo, Mochamad Gaharu Dida; Ismail, Ardhan
Journal of Sustainable Transformation Vol. 3 No. 02 (2025)
Publisher : Universitas Nahdlatul Ulama Kalimantan Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59310/jst.v3i02.55

Abstract

The coastal protection structure in the form of an offshore breakwater has been constructed at Manggar Baru Beach by the local government to address the ongoing issue of coastal erosion. However, despite its construction, several problems remain unresolved. This study aims to evaluate the performance of the constructed breakwater and provide recommendations for alternative, more effective coastal protection designs. The research involves assessing the performance of the breakwater structure and designing alternative coastal protection solutions. The data used in this study consists of secondary data obtained from the East Kalimantan Public Works Department. The evaluation results reveal that in areas near the river mouth, waves are still able to pass through the breakwater structure. Additionally, the river flow, which bends towards the area between the beach and the breakwater, allows water to enter without sufficient protective structures to block it. This indicates that the existing breakwater is not fully effective. As a solution, the proposed coastal protection concept involves extending the length and increasing the height of the breakwater structure. The breakwater is planned to be a rubble structure with the following specifications: crest elevation of +5.5 m LLWL, a total length of 136 m, primary armor layer consisting of tetrapods and crushed stones, and a crest width of 3.2 m.
DESIGN OF PIT X BASED ON PRODUCTION TARGETS USING MINE SCHEDULING CONCEPT AT PT Y Ismail, Ardhan; Mochamad Gaharu Dida Devedo; Pontus, Albertus Juvensius; Thomas , Anita oktoviana L.P.G.M.
INTAN Jurnal Penelitian Tambang Vol. 8 No. 2 (2025): INTAN: Jurnal Penelitian Tambang
Publisher : Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56139/intan.v8i2.349

Abstract

Pit design in surface mining requires a systematic approach that considers operational capacity and efficiency to ensure optimal production target achievement. In the actual condition of the second quarter of 2025, pit X design at PT Y was carried out manually using a trial-and-error method. This method was time-consuming and less flexible to parameter changes, and caused significant deviations from production targets, with overburden reaching 110%, coal only 89%, and stripping ratio increasing to 4.19 from the target of 3.39. This study aims to develop pit design based on Mine Scheduling Concept using SPRY Scheduler software to improve operational effectiveness and efficiency. An applied quantitative method was implemented by integrating reserve data from Minescape, heavy equipment parameters including availability, utilisation, and hourly rate, as well as a mining calendar aligned with operational conditions in the third quarter of 2025. The results show that the generated pit design achieves production targets with very high accuracy: overburden of 4,093,991 Bcm with a deviation of -0.02%, coal of 1,206,663 MT with a deviation of 0.00%, and a stripping ratio of 3.39 as targeted. The application of SPRY Scheduler produces measurable, accurate, and adaptive pit designs without trial-and-error processes, supporting efficient and sustainable mine planning.
Evaluasi Produksi Overburden Menggunakan System Six Big Losses pada Pit K1 Mahakam PT. Insani Baraperkasa Kecamatan Loa Janan Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur Nurhamidah, Nurhamidah; Harjuni Hasan; Ardhan Ismail
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 3 No. 5 (2025): 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.v3i5.1164

Abstract

Overburden removal is a critical phase in coal mining operations, as it directly affects production continuity and operational efficiency. However, production realization often deviates from the mine plan due to various operational constraints. This study, conducted at Pit K1 Mahakam of PT. Insani Baraperkasa, evaluates the causes of underachievement in overburden stripping targets using the Six Big Losses framework, which classifies inefficiencies into Breakdown Losses, Setup and Adjustment Losses, Idling and Minor Stops, Reduced Speed Losses, Process Defect Losses, and Reduced Yield Losses. The analysis revealed that the dominant losses were Reduced Speed Losses (26%) and Setup and Adjustment Losses (10%), primarily caused by disposal congestion, shift changes, and repairs at the loading and disposal areas. Minor contributions were found from idling (3%), production losses (5%), while breakdown losses showed negligible impact. These factors led to increased standby time and reduced equipment cycle effectiveness. Improvement strategies are recommended through optimized disposal allocation, reduction of waiting time, and stricter control of external operational disruptions to enhance stripping efficiency and achieve production targets.
Studi Pengaruh Lama Penumpukan Batubara terhadap Kualitas Proximate Batubara di ROM Coal Stockpile pada PT Multi Harapan Utama Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur Ronal Ronal; Windhu Nugroho; Revia Oktaviani; Agus Winarno; Ardhan Ismail
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 3 No. 6 (2025): 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.v3i6.1218

Abstract

During the coal stockpiling process, the quality of coal may increase or decrease due to direct exposure to open environmental conditions, which can lead to changes in its characteristics. The longer the coal is stored in an open area, the more it undergoes changes caused by rainfall, heat, and air exposure, resulting in an increase in moisture content and ash content, while the calorific value decreases. Therefore, this research was conducted to determine the optimal coal stockpiling duration at the ROM coal stockpile to ensure that the calorific value does not significantly decrease. Coal sampling was carried out every two days from the initial time of stockpiling. After a two-month stockpiling period, the final coal quality results showed a total moisture of 13.89% (ar), inherent moisture of 15.95% (ad), ash content of 4.59% (ad), volatile matter of 40.3% (ad), and fixed carbon of 39.16% (ad). Based on these results, it can be concluded that the recommended storage duration for MCV-HS type coal at the ROM coal stockpile is 154 days. The laboratory analysis results obtained during the research indicate that the longer the coal is stored, the higher the moisture content and ash content become, while the calorific value continues to decrease. This occurs due to water absorption and oxidation reactions that take place during the coal storage period in the ROM coal stockpile.
Perencanaan Counterweight untuk Meningkatkan Kestabilan Lereng dan Kapasitas Disposal pada Area Disposal T4 PT Unggul Dinamika Utama Provinsi Kalimantan Timur Nurfitri Kasran; Revia Oktaviani; Ardhan Ismail; Tommy Trides; Albert Juvensius Pontus
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 4 No. 1 (2026): Februari: 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.v4i1.1318

Abstract

The stability of disposal slopes is a critical aspect of open-pit mining operations because it directly affects operational safety and the continuity of overburden dumping activities. Disposal areas composed of overburden materials generally exhibit heterogeneous characteristics, particularly when soft materials such as mud are present, which can significantly reduce slope stability. Therefore, a comprehensive slope stability evaluation is required prior to further disposal development. This study aims to assess the stability condition of a disposal slope under initial conditions, evaluate the influence of material conditions, and analyze the effectiveness of counterweight application in improving both the safety factor and disposal capacity. The research methodology involved the collection of primary and secondary data, including slope geometry, lithological conditions, and the physical and mechanical properties of disposal materials obtained from laboratory testing and company technical data. Slope stability analysis was performed using the limit equilibrium method with the assistance of geotechnical software, taking into account groundwater conditions and operational loading. The analysis results indicate that the initial disposal condition yielded a safety factor of 0.718, indicating an unstable slope condition. After simulating the removal of mud material, the safety factor increased to 0.907 but remained below acceptable stability criteria. The application of a counterweight significantly improved slope stability, resulting in a safety factor of 1.498. Further optimization through slope geometry redesign produced a final safety factor of 1.101, which satisfies the requirements stipulated in KEPMEN ESDM No. 1827 K/30/MEM/2018. Additionally, the redesign increased the disposal capacity from 119,507,864.23 LCM to 119,682,378.22 LCM, representing an increase of 174,513.99 LCM. These results demonstrate that counterweight application combined with geometric optimization is effective in enhancing both slope stability and disposal capacity.
Pengaruh Pelapukan Berdasarkan Nilai Indeks Durability Terhadap Stabilitas Lereng: Studi Kasus Lereng Jalan Jalur Lintas Selatan Segment Legundi – Planjan, Gunungkidul, Yogyakarta Winonazada, Rety; Ardhan Ismail
Jurnal Teknologi Sumberdaya Mineral (JENERAL) Vol. 6 No. 2 (2025)
Publisher : Program Studi Teknik Pertambangan Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jeneral.v6i2.60001

Abstract

Pembangunan Jalan Jalur Lintas Selatan (JJLS) di Gunungkidul memotong formasi batugamping dengan geometri lereng tinggi dan curam yang berpotensi mengalami ketidakstabilan akibat proses pelapukan. Penelitian ini bertujuan mengetahui pengaruh tingkat pelapukan terhadap stabilitas lereng menggunakan pendekatan nilai indeks durabilitas. Metode penelitian meliputi pengujian laboratorium untuk menentukan sifat fisik dan mekanik batuan (kuat tekan uniaksial dan kuat geser), uji slake durability berdasarkan standar ISRM untuk klasifikasi tingkat pelapukan, serta pemodelan numerik metode elemen hingga menggunakan Rocscience RS2 untuk analisis stabilitas. Hasil menunjukkan sampel batugamping dari STA 0+700 dan STA 3+800 termasuk kelas pelapukan II (slightly weathered) dengan indeks durabilitas 96,18-96,75%. Nilai SRF bervariasi: STA 0+700 sebesar 4,62; STA 3+800A sebesar 2,14; dan STA 3+800B sebesar 3,46. Penurunan nilai indeks durabilitas menyebabkan penurunan nilai SRF, menunjukkan bahwa pelapukan mempengaruhi stabilitas lereng batugamping. Selain itu kestabilan lereng juga dipengaruhi oleh parameter kuat geser efektif dan kondisi massa batuan, sehingga penilaian kestabilan lereng menggunakan pendekatan indeks durabilitas perlu dianalisis bersama hasil uji mekanik dan model numerik.
Studi Pengaruh Derajat Kejenuhan Terhadap Kuat Geser Tanah Anandyta Suci Ramdani; Revia Oktaviani; Ardhan Ismail; Tommy Trides; Albertus Juvensius Pontus
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 4 No. 1 (2026): 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.v4i1.1341

Abstract

Soil strength characteristics are strongly influenced by its physical and mechanical properties, one of which is shear strength. Soil shear strength is affected by cohesion (c), internal friction angle (ϕ), and soil moisture conditions. In open-pit mining conditions, soil moisture content is greatly influenced by rainfall and water seepage, which can increase the degree of saturation within the soil mass. An increase in the degree of saturation generally leads to a rise in pore water pressure, thereby reducing the effective normal stress and resulting in a decrease in soil shear strength. This study aims to determine the effect of the degree of saturation on soil shear strength. This research employs a quantitative method to analyze the influence of the degree of saturation under three conditions (natural, dry, and saturated) on soil shear strength through laboratory testing using the direct shear test. The tests conducted include soil physical properties testing in accordance with SNI 1965-2008, specific gravity testing based on SNI 1964-2008, and soil shear strength testing following SNI 3420-2016. The results indicate that the average degree of saturation under natural conditions is 64.63% with a cohesion value of 7.4 kN/m², under dry conditions is 33.18% with a cohesion value of 8.2 kN/m², and under saturated conditions is 83.08% with a cohesion value of 3 kN/m². It can be concluded that a higher degree of saturation or more saturated soil samples result in lower cohesion values, whereas a lower degree of saturation or drier soil samples lead to higher cohesion values.
Evaluasi Geometri Jalan Angkut Batubara Menggunakan Hasil Pengukuran Terestrial Laser Scanner di PT Trubaindo Coal Mining Kabupaten Kutai Barat Provinsi Kalimantan Timur Arya Lawing Sembiring; Windhu Nugroho; Ardhan Ismail; Henny Magdalena; Agus Winarno
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 4 No. 2 (2026): Mei: 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.v4i2.1362

Abstract

The evaluation of haul road geometry at PT Trubaindo Coal Mining was conducted to ensure that the haul road from the stockroom to the jetty meets applicable technical standards, thereby supporting the smoothness, safety, and efficiency of coal transportation activities. This study aims to analyze the conformity of haul road geometric parameters, including straight road width, curve width, curve radius, cross slope, longitudinal grade, and superelevation, based on the standards of AASHTO 7th Edition and Kepmen 1827 of 2018. The research method employed field measurements using a Terrestrial Laser Scanner (TLS), followed by data processing using Maptek and Surpac software. The obtained data were then compared with the applicable standards to determine the level of conformity of the haul road geometry. Based on field measurements, the average values obtained were 14.99 m for straight road width, 18.45 m for curve width, 0.22 m for cross slope, 6.97% for grade, 223.51 m for curve radius, and 1.40 m for superelevation. Furthermore, based on calculations and analysis referring to AASHTO 7th Edition and Kepmen 1827 of 2018, and considering the largest haulage equipment used (Volvo FMX 480), the ideal haul road geometry values were determined as follows: 13 m for straight road width, 17 m for curve width, 124 m for curve radius, 0.26 m for cross slope, 1 m for superelevation, and 6% for grade based on PT Trubaindo Coal Mining standards.
EVALUASI PARAMETER LINGKUNGAN DALAM PELAKSANAAN KEGIATAN PENGASPALAN DI WILAYAH SAMARINDA Miswara Al-Wadji; Mochamad Gaharu Dida Devedo1; Ardhan Ismail
PROSIDING SEMINAR KIMIA Vol 4 No 2 (2025): Prosiding SNKT 2025
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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

Abstract

Construction activities have the potential to affect environmental quality, particularly ambient air, noise, vibration, and surface water around project sites. This study aims to analyze the environmental quality of construction activities based on laboratory test results and compare them with the environmental quality standards stipulated in Government Regulation No. 22 of 2021. The research used a descriptive quantitative approach through the analysis of air parameters (NO₂, TSP, CO), noise level, vibration, and river water quality (DO). The laboratory results showed that all parameters were below the environmental quality limits, with NO₂ = 34 µg/Nm³, TSP = 76 µg/Nm³, CO = 206 ppm, noise = 64 dB(A), vibration = 0.2 mm/s, and DO = 6.31 mg/L. These findings indicate that the construction activities did not significantly impact the surrounding environmental conditions. Effective environmental management, controlled heavy equipment operations, and compliance with environmental regulations were key factors in maintaining environmental quality. Therefore, it can be concluded that the monitored construction project met the required environmental standards and remained within safe environmental conditions. Keywords: ambient air, construction wastewater, environmental quality, noise, vibration
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.
Co-Authors Agus Winarno Albert Juvensius Pontus Albertus Juvensius Pontus Anandyta Suci Ramdani Arya Lawing Sembiring Devedo, Mochamad Gaharu Dida Fajar Ramadhan Harjuni Hasan Henny Magdalena Indaswati Indaswati Jhony Maxi Harjadi Juan, Juan Lucia Litha Respati Miswara Al-Wadji Mochamad Gaharu Dida Devedo Mochamad Gaharu Dida Devedo1 Muhammad Rahul Shidiq nadhirawaty, rizqi Nurfitri Kasran Nurhamidah Nurhamidah Nurhidayatullah Am Pontus, Albertus Rety Winonazada Revia Oktaviani ronal ronal Ruslan Patur Sari, Chalsi Mala Shalaho Dina Devi Shalaho Dina Devy Supriyanto, Muhammad Ibadurrahman Arrasyid Thomas , Anita oktoviana L.P.G.M. Tommy Aria Pradana Tommy Trides Weggie Atanasius Tonapa windhu Nugroho Winonazada, Rety