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All Journal Jurnal Teknologi Pertambangan Jurnal Teknologi Mineral dan Batubara Jurnal Mineral, Energi dan Lingkungan KURVATEK Jurnal Mineral, Energi dan Lingkungan Journal of Earth and Marine Technology (JEMT) Journal of Metallurgical Engineering and Processing Technology Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII Mining Science and Technology Journal Jurnal Teknologi Mineral dan Batubara Jurnal Rekayasa Proses
Shofa Rijalul Haq
UPN Veteran Yogyakarta
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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Karakteristik Batubara Formasi Warukin di Kalimantan Selatan serta Implikasinya pada Teknologi Pencairan Batubara Nursanto, Edy; Haq, Shofa Rijalul; Ardian, Aldin
Jurnal Mineral, Energi dan Lingkungan Vol 7 No 2 (2023): Jurnal Mineral Energi dan Lingkungan Volume 7 No. 2 Tahun 2023
Publisher : Universitas Pembangunan Nasional (UPN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmel.v7i2.11075

Abstract

Batubara di Indonesia didominasi oleh peringkat rendah (low rank coal) prosentase lebih dari 85% dari total cadangan batubara. Meskipun demikian, batubara peringkat rendah lebih mudah diolah untuk meningkatkan nilai tambahnya karena struktur molekul dan gugus hidroksil batubara peringkat rendah yang reaktif dibandingkan dengan batubara peringkat tinggi. Penelitian ini bertujuan untuk mengkaji karakteristik batubara peringkat rendah formasi Warukin pada proses pencairan batubara. Data primer berupa pengambilan sampel batubara dan arah kedudukannya serta kemiringannya diperoleh dengan metode pengambilan ply by ply. Analisis proksimat, ultimat, maseral dan reflektan vitrinit dilakukan pada sampel-sampel tersebut dengan variasi pengujian, kemudian diolah dengan analisis secara teoritis empiris yang disajikan dalam bentuk tabel. Analisis data dilakukan berdasarkan hasil pengujian di laboratorium secara deskriptif kualitatif.  Dengan penelitian ini, sebaran sifat dan kualitas batubara dapat dievaluasi, serta alternatif teknologi penambangan dengan pencairan dapat direncanakan secara efektif dan efisien dengan penciri maseral liptinit mempunyai persentasi besar, yaitu rata-rata 34,28 % pada lapisan.
ANALISIS METODE NUMERIK PENGARUH HUJAN TERHADAP KESTABILAN LERENG TUNGGAL TIMBUNAN DI TAMBANG TERBUKA BATUBARA Akbar, Wahyu Nusantara; Dwinagara, Barlian; Saptono, Singgih; Haq, Shofa Rijalul; Lusantono, Oktarian Wisnu; Prabandaru, Prasodo Datu
Jurnal Teknologi Mineral dan Batubara Vol 21 No 1 (2025): Jurnal Teknologi Mineral dan Batubara Edisi Januari 2025
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol21.No1.2025.1599

Abstract

Indonesia, with its tropical climate and high rainfall, especially near the equator, is prone to slope instability influenced by intense rainfall events. Rainfall increases pore water pressure, reduces effective stress, and decreases shear strength, which in turn lowers the safety factor and increases the probability of failure. However, studies on pore pressure changes during rainfall infiltration have not been extensively studied, particularly in Indonesia. This study aims to analyze the effect of rainfall on the stability of a single slope in a waste dump using a numerical method based on a coupled hydro-mechanical approach. Simulations were conducted using transient finite element analysis (TFEA) to evaluate pore water pressure variations. In addition, the limit equilibrium method (LEM) modeling was also carried out to assess changes in slope safety factors. The analysis was performed using Slide2 software under various rainfall and duration scenarios, with a total of 1,568 model combinations over a 24-hour simulation period. The results show that rainfall events reduce the safety factor value by up to 31.54%. The relationship between the safety factor value and rainfall can be expressed by the equation FK = 2,1607 CH-0,05, which shows a strong correlation with an R2 value of 0,9309.
ANALISIS METODE NUMERIK PENGARUH HUJAN TERHADAP KESTABILAN LERENG TUNGGAL TIMBUNAN DI TAMBANG TERBUKA BATUBARA Akbar, Wahyu Nusantara; Dwinagara, Barlian; Saptono, Singgih; Haq, Shofa Rijalul; Lusantono, Oktarian Wisnu; Prabandaru, Prasodo Datu
Jurnal Teknologi Mineral dan Batubara Vol 21 No 1 (2025): Jurnal Teknologi Mineral dan Batubara Edisi Januari 2025
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol21.No1.2025.1599

Abstract

Indonesia, with its tropical climate and high rainfall, especially near the equator, is prone to slope instability influenced by intense rainfall events. Rainfall increases pore water pressure, reduces effective stress, and decreases shear strength, which in turn lowers the safety factor and increases the probability of failure. However, studies on pore pressure changes during rainfall infiltration have not been extensively studied, particularly in Indonesia. This study aims to analyze the effect of rainfall on the stability of a single slope in a waste dump using a numerical method based on a coupled hydro-mechanical approach. Simulations were conducted using transient finite element analysis (TFEA) to evaluate pore water pressure variations. In addition, the limit equilibrium method (LEM) modeling was also carried out to assess changes in slope safety factors. The analysis was performed using Slide2 software under various rainfall and duration scenarios, with a total of 1,568 model combinations over a 24-hour simulation period. The results show that rainfall events reduce the safety factor value by up to 31.54%. The relationship between the safety factor value and rainfall can be expressed by the equation FK = 2,1607 CH-0,05, which shows a strong correlation with an R2 value of 0,9309.
DESAIN KONSTRUKSI WETLAND UNTUK PENGELOLAAN AIR ASAM TAMBANG DI VOID PASCA TAMBANG BATUBARA Rukmana, Bantar Tyas Suksmawati; Haq, Shofa Rijalul; Lusantono, Oktarian Wisnu
KURVATEK Vol 11 No 1 (2026): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v11i1.6136

Abstract

Air asam tambang (AAT) merupakan salah satu permasalahan lingkungan yang sering dijumpai pada kegiatan pertambangan, termasuk di Kutai Barat, Kalimantan Timur. Adanya keberadaan AAT dapat menurunkan kualitas lingkungan. Penelitian ini bertujuan untuk merancang constructed wetland sebagai solusi pengolahan AAT secara pasif dengan memanfaatkan tanaman Typha sp. dan mikroalga. Metode yang digunakan meliputi karakterisasi geokimia batuan, analisis hidrologi, dan pengujian pilot project dengan menggunakan 5 kompartemen. Hasil uji menunjukkan sebagian besar batuan pada area low wall tergolong pembentuk asam, sedangkan air creek di sekitar void memiliki pH 2–3,5. Hasil uji pilot project memperlihatkan bahwa penggunaan kapur dan pupuk organik pada media tanam dengan Typha sp dapat meningkatkan pH air menjadi 6,91 dan menurunkan logam terlarut hingga di bawah baku mutu, serta memperbaiki kualitas tanah. Penelitian ini menyimpulkan bahwa lahan basah buatan berpotensi sebagai solusi pasif, ramah lingkungan, dan berkelanjutan untuk pengelolaan air asam tambang
Tren Penelitian Global Pemanfaatan Limbah Abu Terbang Batubara (Coal Fly Ash): Analisis Bibliometrik Menggunakan Database Pengindeks Scopus Intan Abdillah Arrasyid; M. Nurcholis; Shofa Rijalul Haq
Mining Science And Technology Journal Vol 5 No 1 (2026): Mining Science and Technology Journal
Publisher : Program Studi Teknik Pertambangan, Fakultas Teknik, Universitas Sulawesi Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54297/minetech-journal.v5i1.1501

Abstract

This study presents a systematic bibliometric review of global research trends in coal fly ash (CFA) utilization between 2015 until 2025, drawing data from the Scopus database. The analysis reveals a notable increase in publications, particularly a sharp surge in 2023 and 2024, indicating growing urgency regarding sustainable industrial waste management. Geographically, China leads research contributions, aligning with its role as a major coal producer, followed by Poland, the United States, and India, underscoring the topic's relevance across diverse global applications, from construction to environmental remediation. Research focus is broadly distributed across several key fields, including environmental science, materials science, and energy. Prominent topics identified remediation of environmental concerns, carbon emission mitigation efforts through combustion processes, and the development of innovative materials such as cement and zeolites using CFA as an alternative component. The central position of "fly ash" as a core keyword in the thematic network underscores its centrality in exploring the potential of this valuable by-product. This review aims to provide comprehensive insights for the scientific community, policymakers, and industrial sectors regarding current research dynamics and prospective directions in CFA utilization.
Co-Authors Ade Kurniawan Akbar, Wahyu Nusantara Aldin Ardian aldin ardian, aldin Anin, Michell Satria Chame Bagus Wiyono, Bagus Barlian Dwinagara Cahyadi, Tedy Agung Dyah Probowati, Dyah Edy Nursanto Edy Nursanto Edy Nursanto Edy Nursanto Firdaust, Rosyid Umar Husein Ars Gede Gupta Rastika Heru Suharyadi Imam Prasetyo Indun Titisariwati, Indun Inmarlinianto Inmarlinianto Inmarlinianto Inmarlinianto Inmarlinianto Inmarlinianto, Inmarlinianto Intan Abdillah Arrasyid Jeon, Sanghee Lidana Erfiandri Lusantono, Oktarian Wisnu M. Nurcholis Mendrofa, Yudha Chrisman Mirahati, Riria Zendi Muhammad Arief Wicaksono Peter Eka Rosadi, Peter Eka Pinontoan, Vhinsky Efraim Prabandaru, Prasodo Datu Prasetyo, Yuda Puji Handayani Kasih Raden Haryanto Rafi Dzarbila Akhyar Rahmatulah, Raja Rhezki Ratna Mustika Dewi Rika Ernawati Rika Ernawati Roy Nastigor Nasution Rukmana, Bantar Tyas Suksmawati Setiyawa, Meindra Shafiyurrhaman, Muhammad Faiz Singgih Saptono, Singgih Siwidiani, Indri Lesta Soekamto, Untung Tasidjawa, Gabriela Elisabeth Yunie Herawati