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All Journal 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
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.
Co-Authors Agus Winarno Albertus Juvensius Pontus Devedo, Mochamad Gaharu Dida Fajar Ramadhan Harjuni Hasan Henny Magdalena Jhony Maxi Harjadi Juan, Juan Lucia Litha Respati Mochamad Gaharu Dida Devedo Muhammad Rahul Shidiq nadhirawaty, rizqi Nurhamidah Nurhamidah Nurhidayatullah Am Pontus, Albertus Pontus, Albertus Juvensius Rety Winonazada Revia Oktaviani 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 windhu Nugroho Winonazada, Rety