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All Journal APLIKA Jurnal Ilmu Pengetahuan dan Teknologi Journal of Degraded and Mining Lands Management Jurnal Chemurgy JOURNAL SCIENTIFIC OF MANDALIKA (JSM) Jurnal Sosial dan Teknologi Baselang: Jurnal Ilmu Pertanian, Peternakan, Perikanan dan Lingkungan Dinamika Lingkungan Indonesia Journal Transformation of Mandalika Journal of Comprehensive Science MINERAL Nusantara Civil Engineering Journal Jurnal Inovasi Global JURNAL TEKNOLOGI MINERAL FT UNMUL ANDIL Mulawarman Journal of Community Engagement Journal of Media, Sciences and Education
Harjuni Hasan
Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Mulawarman
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Journal : Journal of Degraded and Mining Lands Management

 1 
Disposal slope design based on low-plasticity rock’s shear strength in coal mining activities Harjuni Hasan; Revia Oktaviani; Tommy Trides; Dionisyus Fransiskus Sinaga
Journal of Degraded and Mining Lands Management Vol 10, No 1 (2022)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2022.101.3821

Abstract

Slope stability is the primary factor in designing a stable slope. The strength of the disposal slope relies on the characteristic of the dump materials. The rock shear strength denotes rock ability to withstand the burden, both constant and dynamic load. The weakest material used as a reference in designing the disposal slope is siltstone in Pulaubalang formation (location-04). The safety value in Location 04 and 02 tend to drop quickly as the inclination increase, while the safety in location 01 and 03 tend to fall slowly. This indicates that rocks with a lower plasticity index tend to be stronger in steeper slope conditions. The slope geometry was designed to be 10, 15, 20, and 25 meters high with a slope angle of 10o, 15o, 20o, 25o, 30o, 35o, 40o, 45o, 50o, 55o, and 60o. The slope geometry is considered stable and safe. However, this study suggests that the most effective slope design is the slope with 25 meters high, overall slope of 25,3o; the single slope of 35o; berm width 4,66 meters, bench height of 5 meters, with the safety factor value of 4.30 (SF= 4.30).
The potential of coal mine voids for clean water sources in Nusantara Capital City Hasan, Harjuni; Sarwono, Edhi
Journal of Degraded and Mining Lands Management Vol. 12 No. 1 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.121.6771

Abstract

PT. Singlurus Pratama operates four mining blocks: Sungai Merdeka, Argosari, Margomulyo, and Mutiara. he Sungai Merdeka block has three voids with significant potential as a source of clean water for Nusantara Capital City (IKN), given its location within the city's development area. Surface water flows from the southern ridge to the north, accumulating in the voids of the Sungai Merdeka block, with a total inflow of 449,218,750 m³ per day. This volume can meet the needs of 1,796,875 to 4,492,187 people. One of the geological formations of the Sungai Merdeka block is the Balikpapan Formation, composed of alternating sandstone and clay with intercalations of shale and limestone, which is likely an aquifer. The water quality in voids 1 and 2 falls into the fairly good category (WQI = 70.07 and 70.77), while void 3 has moderate quality (WQI = 64.76). Thus, the water from the Sungai Merdeka voids can be used for personal and household hygiene, as well as raw water for drinking. Additionally, it can be utilized for recreational water facilities, freshwater aquaculture, livestock, and irrigation. However, the void water in the Sungai Merdeka block is indicated to have formed acid mine drainage, as the exposed void walls are contaminated with oxygen and leached by water. This leads to increased acidity, as indicated by the low pH values of the water. The increased acidity also results in higher concentrations of dissolved metals within the voids, necessitating careful management and treatment to ensure the water’s safety and usability for various applications.
Co-Authors Adeliana Khairunisa, Aji Agus Winarno Agus Winarno Agus Winarno Agus Winarno, Agus Aipassa, Marlon Ivanhoe Albertus Juvensius Pontus Alfiyanda, Ahmad Azzahra, Siti Maghfirah Bandaso, Surya Bidang, Mayleni Devy, Shalaho Dina Dina Devy, Shalaho Dionisyus Fransiskus Sinaga Donal Donal Donal, Donal Edhi Sarwono Gerry Tri Virgin Gina Saptiani Graciella Jacob Hamzah Umar Henny Magdalena Hikmawati Ibrahim Ibrahim Ilham, Akbar Irvantoni Simbolon, Desron Jawatir Pardosi Jumsar A Juvensius Pontus , Albertus Juvensius Pontus, Albertus Kusnanto, Fransiska Angelina Lhita Respati, Lucia Litha Respati, Lucia Lucia Litha Respati Lumban Tobing Bill Rexy M. Rijal, M. Magdalena, Heny Megawati AP Milda Milda Miranda, Virgita Mushawir Mushawir Narius , Nugroho, Windhu Nurfaysa Pontus, Albertus Juvensius Respati, Lucia Litha Revia Oktaviani Rinto Syahreza Pahlevi Saeppudin, Ahmad Sakdillah Sakdillah A Sandri Tandi Rapang Satriana Aulia, Andi Sitepu, Joe Vandame Tommy Trides Tommy Trides Tommy Trides Toni, Toni Trides, Tommy Vandrianus Felix Feto Nuwa Wahyu Garini, Andini Dwi Warman, Neni Windhu Nugroho windhu Wiradhana, Ni Made Ayu Dwi Kartika Yauri Imanuel Tobak Yufita, Zaenul Zainuddin, Zainuddin