i DECISION-MAKING ANALYSIS OF GROUND SUPPORT INSTALLATION CHANGES, CASE STUDY IN HANNEKAM TUNNEL FINAL PROJECT In partial fulfilment of the requirements for the master’s degree from Institut Teknologi Bandung By AKHMAD MUZAHHID ZYEN Student ID: 29122199 (Master of Business Administration Program) INSTITUT TEKNOLOGI BANDUNG 2024 ii ABSTRACT DECISION-MAKING ANALYSIS OF GROUND SUPPORT INSTALLATION CHANGES, CASE STUDY IN HANNEKAM TUNNEL By AKHMAD MUZAHHID ZYEN 29122199 (Master of Business Administration Program) This research is centered addressing the significant challenges of the Hannekam Tunnel, a critical mining infrastructure in PT. Freeport Indonesia's (PTFI) operations within the Grasberg minerals district in Papua, Indonesia. This study gains relevance against the backdrop of the rising global demand for copper, driven by the surge in electric vehicles and renewable energy industries, underscoring the significance of copper as the "metal of electrification." Ensuring the efficient and sustainable operation of critical mining infrastructures. Employing a blend of qualitative and quantitative methods, the research uses Cost- Benefit Analysis (CBA) for assessing the economic viability of ground support alternatives, considering construction, maintenance, and potential operational disruptions. The Analytic Hierarchy Process (AHP) provides a decision-making framework, prioritizing methods based on safety, economic feasibility, and sustainability. The study addresses the tunnel's deteriorating condition, aiming for stability until at least 2041 through expert insights, site inspections, and geological mapping, focusing on sustainable mining practices. The research concludes with the AHP identifying Types D as optimal ground supports, with Type D preferred for its economic and operational benefits, marked by a 27.3% global priority score. This choice underscores a cost-effective and efficient solution, meeting safety standards, integrating shotcrete, shotcrete arches, bolts, and wire mesh to ensure dependable tunnel support in favorable rock conditions. The Delphi method's consensus on Type D and CBA's financial validation underscore its economic advantages, with lower upfront and ongoing costs. Type D's selection reflects a comprehensive evaluation of technical challenges, economic implications, and long-term needs, emphasizing continuous geotechnical monitoring, cost reduction, productivity maintenance, and system robustness for future operational demands. The decision-making process, enriched by diverse expertise, exemplifies thorough evaluation, economic foresight, and strategic planning, ensuring the Hannekam Tunnel's role in the global copper supply chain. Keywords: Analytic Hierarchy Process (AHP), Cost-Benefit Analysis (CBA), Delphi Method, Ground Support System, Mining Infrastructure. iii ABSTRAK ANALISA PENGAMBILAN KEPUTUSAN DARI PERUBAHAN PEMASANGAN PENYANGGA BATUAN, STUDY KASUS DI TEROWONGAN HANNEKAM Oleh AKHMAD MUZAHHID ZYEN 29122199 (Program Studi Magister Administrasi Bisnis) Terowongan Hannekam, sebuah infrastruktur pertambangan penting pada area operasional PT. Freeport Indonesia (PTFI) di distrik mineral Grasberg di Papua, Indonesia, adalah fokus penelitian ini. Studi ini memiliki relevansi dengan latar belakang meningkatnya permintaan global akan tembaga, yang didorong oleh lonjakan kendaraan listrik dan industri energi terbarukan, yang menggarisbawahi pentingnya tembaga sebagai “elektrifikasi logam.” Memastikan pengoperasian infrastruktur pertambangan penting yang efisien dan berkelanjutan. Menggabungkan metode kualitatif dan kuantitatif, penelitian ini menggunakan Analisa Biaya-Manfaat (CBA) untuk menilai sisi ekonomi dari alternatif sistem penyanggaan, mempertimbangkan konstruksi, pemeliharaan, dan kemungkinan gangguan operasional. Proses Hierarki Analisis (AHP) menyediakan kerangka kerja pengambilan keputusan, memprioritaskan metode berdasarkan keamanan, kelayakan ekonomi, dan keberlanjutan. Kondisi terowongan yang memburuk juga dibahas dalam penelitian ini. Tujuannya adalah untuk menjaga stabilitas terowongan setidaknya hingga 2041 dengan menggunakan wawasan ahli, inspeksi area, dan pemetaan geologis, dengan fokus pada praktik pertambangan berkelanjutan. Melalui AHP, penelitian ini menemukan bahwa Tipe D adalah jenis sistem penyangga yang paling ideal, dengan nilai 27,3% dan disukai karena sisi ekonomi dan operasionalnya. Pilihan ini menekankan solusi hemat biaya dan efisien, yang memenuhi standar keamanan, dengan mengintegrasikan shotcrete, shotcrete arches, bolts, dan wire mesh untuk memastikan penyangga terowongan yang dapat diandalkan dengan kondisi batuan yang ada. Konsensus dari metode Delphi pada tipe D dan validasi keuangan melalui CBA, menekankan keuntungan ekonominya yang lebih rendah dalam biaya awal dan biaya berkelanjutan. Pemilihan Tipe D mencerminkan penilaian komprehensif terhadap tantangan teknis, implikasi ekonomi, dan kebutuhan jangka panjang, juga menekankan pemantauan geoteknis yang berkelanjutan, pengurangan biaya, pemeliharaan produktivitas, dan ketahanan sistem untuk kebutuhan operasional masa depan. Proses pengambilan keputusan diperkaya oleh keahlian yang beragam, contoh evaluasi menyeluruh, perencanaan ekonomi, dan perencanaan strategis, memastikan peran Hannekam Tunnel dalam rantai pasokan tembaga global. iv Kata Kunci: Analisis Biaya-Manfaat (CBA), Infrastruktur Pertambangan, Metode Delphi, Proses Hierarki Analitik (AHP), Sistem Penyanggaan v DECISION-MAKING ANALYSIS OF GROUND SUPPORT INSTALLATION CHANGES, CASE STUDY IN HANNEKAM TUNNEL VALIDATION PAGE By Akhmad Muzahhid Zyen Student ID: 29122199 Master of Business Administration Program Institut Teknologi Bandung Approved Date ………………………. Supervisor (Dr. Eng. Nur Budi Mulyono) vi DECLARATION OF NON -PLAGIARISM Plagiarism is: Taking, using, and submitting a work of another, including an idea, writing, or invention, as if it was her or his own. Plagiarism includes (but not limited to): 1. quoting verbatim the work of another without acknowledgement of the source; 2. paraphrasing the work of another without acknowledgement of the source; 3. using the idea of another without acknowledgement of the source; 4. submitting the work of another without identifying clearly who did the work; 5. colluding by submitting the work of another as her or his own with consent from the other. I understand that Plagiarism is wrong, a breach of academic integrity, and against Program, School, and University’s Policy and Regulation. I declare that all material in this Final Project is original, my own work, and does not involve plagiarism. I have not allowed, and will not allow, another to copy my work with the intention of submitting it as her or his own work. Name: Akhmad Muzahhid Zyen Student ID: 29122199 Signed_______________________________________ Date January 28, 2024 vii FINAL PROJECT GUIDANCE Unpublished masters’ final project is registered and available in the Library of Bandung Institute of Technology, and is open for public, provided that the author owns the copyright in accordance with the intellectual property rights that are applicable in the Library of Institut Teknologi Bandung. Bibliographical references are allowed to be use in a limited manner; however, the citation and summarization can only be proceeded upon the author’s permission and must include the scientific norm of stating this final project as the source. This final project has to be cited as: Zyen, Akhmad. (2023): Decision-Making Analysis Of Ground Support Installation Changes, Case Study In Hannekam Tunnel, Masters’ Final Project, Institut Teknologi Bandung. Reproduction or publication of parts or whole of the final project must be under the consent of the Head of Graduate School, Bandung Institute of Technology. viii ACKNOWLEDGEMENTS Above all, and most importantly, I, the author of this final project, want to thank Allah SWT for His blessings that have allowed me to finish my studies for the Master of Business Administration at the Institut Teknologi Bandung's School of Business and Management. Second, I want to express my gratitude to my manager, senior manager and vice president, Bapak M.iman Santasa, Rd. Gautama, Bapak Anton Perdana, and Bapak Ardhin Yuniar, for their support of the topic I chose for my final project, which is closely related to the work I do in this position, as well as for allowing and approving me to continue my education while employed at the department. I also would like to thank the UG Geotech Mine Infrastructure Team for helping with the Technical Analysis and providing the necessary information. I would like to express my appreciation and gratitude to my supervisor as well, Dr. Eng. Nur Budi Mulyono, for his full support and guidance throughout this final project creation through completion. Thank you very much for being such awesome and generous supervisor for sharing your ideas, expertise, and knowledge so that I can complete this final project in timely manner.