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Jurnal Teknologi Mineral dan Batubara
Published by Balai Besar Pengujian Mineral dan Batubara tekMIRA
ISSN : 25278789     EISSN : 19796560     DOI : 10.30556/jtmb
Core Subject : Science, Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Materials Science & Nanotechnology
Jurnal Teknologi Mineral dan Batubara adalah Jurnal yang diterbitkan oleh Pusat Penelitian dan Pengembangan Teknologi Mineral dan Batubara (Puslitbang tekMIRA). Jurnal Teknologi Mineral dan Batubara terbit pada bulan Januari, Mei, September, memuat karya-karya ilmiah yang berkaitan dengan litbang mineral dan batubara mulai dari eksplorasi, eksploitasi, pengolahan, ekstraksi, pemanfaatan, lingkungan, kebijakan dan keekonomian termasuk ulasan ilmiah terkait.
Arjuna Subject : Energi (semua kategori) - Energi (Lain-Lain)
Articles 272 Documents
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POTENSI DAN PROBABILITAS KELONGSORAN LERENG TAMBANG KUARI BATUGAMPING DI DAERAH MORAMO UTARA, SULAWESI TENGGARA Masri, Masri; Mili, Marwan Zam; Nafiu, Waode Rizky Awaliah; Wahab, Wahab; Agriawan, Husran; Ngkoimani, La Ode
Jurnal Teknologi Mineral dan Batubara Vol 20 No 2 (2024): Jurnal Teknologi Mineral dan Batubara Edisi Mei 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No2.2024.1550

Abstract

Demolition of limestone fragments in quarries can cause slope stability issues. This study aims to identify the potential for rock failures and determine the probability of failures on three quarry slopes. The type of rock failures was identified using kinematics analysis. Determining the probability of failures is also required to accommodate the uncertainty of input parameters in the factor of safety calculation. The probability of failure was determined using the limit equilibrium method and chi-square tests to fit shear strength curves on the discontinuities. The Barton-Bandis criterion was used to determine the shear strength of the discontinuities. On the slopes, the discontinuity types are bedding, joint, and shear fractures. Kinematics analysis of slope-1 and slope-2 revealed the possibility of wedge failures with an occurrence probability ranging from 19.80 to 20.81%. On slope 3, a planar failure possibility with a 69.49% of occurrence probability was identified. Even though the kinematics analysis suggested the possibility of rock failures, the factor of safety on all three slopes was above the threshold (7.28 – 30.58) with probability of failure ranging from 0 – 6.14%. Based on sensitivity analysis, factor of safety is most influenced by changes in the bedding cohesion. Variations in groundwater recharge at discontinuities also influence the factor of safety and the probability of failures, particularly in planar failures. It is recommended to evaluate other types of rock failures, such as the potential of rockfalls.
POTENSI LONGSOR AKIBAT AKTIVITAS PENAMBANGAN ILEGAL DI KECAMATAN SUNGAI DURIAN, KABUPATEN KOTABARU Wahyuzi, Radhi; Muslim, Dicky; Zakaria, Zulfiadi; Sukiyah, Emi; Sophian, Raden Irvan
Jurnal Teknologi Mineral dan Batubara Vol 20 No 2 (2024): Jurnal Teknologi Mineral dan Batubara Edisi Mei 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No2.2024.1567

Abstract

Generally, landslide potential can occur when a materials drifting force dominates the resisting force. A state of equilibrium is reached when the two aspects are in comparable conditions, or when the force of drift is less than the force of resistance. Spatial changes, morphological changes and changes in land use are often the cause of landslides if these changes are not properly planned and carried out without taking into account the principles of geotechnical engineering. One of the changes brought about by land use change is mining activity, in which very large morphological changes occur during the mining operation. These changes will usually have the potential to cause landslides if they are not managed in a proper and correct procedure. However, ilegal mining communities always appear and carry out mining operations without considering the principles of Good Mining Practices, so it will be quite dangerous for the environment and human beings, both in terms of potential landslide hazards and environmental damage. The purpose of this study is to determine the area and potential landslide hazard in the unlicensed community mining area using satellite imagery and slope stability analysis at the mining site. This research was conducted using a combination of geotechnical laboratory testing methods and field observations, as well as slope stability analysis, in order to determine the landslide potential at the research site. In general, the research data clearly shows that the slope formed due to ilegal mining activities has a factor of safety value in an unstable condition (0.516-1.076) with a probability of failure ranging from 15%-20%, and has a high consequence of failure status. The research data indicates that the research site is experiencing an unstable condition, which is likely the result of ilegal mining activities with the potential of landslides in the research site.
EVALUASI KINERJA JIG TIPE PAN AMERICAN TERHADAP RECOVERY TIMAH HASIL PENCUCIAN BIJIH TIMAH PADA KAPAL ISAP PRODUKSI (KIP) TIMAH 17 DI LAUT TEMPILANG KABUPATEN BANGKA BARAT, PROVINSI BANGKA BELITUNG Abror, Muhammad; Lagowa, Muhammad Ikrar; Hakim, Muhammad El
Jurnal Teknologi Mineral dan Batubara Vol 20 No 3 (2024): Jurnal Teknologi Mineral dan Batubara Edisi September 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No3.2024.1589

Abstract

The early stage of mineral processing usually focuses mainly on recovery, not the grade of the concentrate. Tin dressing in Production Section Vessel on January 2023 did not meet target recovery of 96%. This study aimed to evaluate and optimize jig performance to achieve the desired target. The study focused on evaluating the configuration of variables such as feed velocity, bed thickness, as well as number and length of strokes. Measurement data of jig performance variables and tailings and concentrate samples were used as comparative data to the SOP. The calculation of the sample content was carried out through the grain counting analysis (GCA) method, which calculated the amount of concentrate and losses in each jig. The final results of washing recovery prior to washing evaluation were 92.70% Sn in observation I and 88.68% Sn in observation II, respectively. The washing process in observation I and II conditions were not considered optimal because the recovery had not reached the target. This is caused by variables that are not under the provisions To optimize the performance of the jig was the installation a comb in the flow section of the jig to standardize the flow that was too fast, remeasurement after the addition of the hematite stone, repairing pillow blocks and eccentric coupling bolts on the stroke length setting and resetting the variables in the jig performance following existing SOPs. After the evaluation and readjustment of the jig variables, the recovery was increased to 97.53% Sn. From this study it can be concluded that the failure to achieve the targeted recovery was caused by operational variables that did not meet the SOP including the length and number of strokes, bed thickness, and water flow rate due to technical constraints. After being repaired, the dressing recovery could meet or even exceed the recovery target.
ANALISIS PENCAMPURAN BATUBARA PADA PT. BUKIT ASAM TBK DALAM UPAYA MENINGKATKAN KUALITAS BATUBARA UNTUK MEMENUHI KRITERIA PERMINTAAN PLTU BUKIT ASAM TANJUNG ENIM, SUMATERA SELATAN Fitriani. A; Zahar, Wahyudi; El Hakim, Muhammad
Jurnal Teknologi Mineral dan Batubara Vol 20 No 3 (2024): Jurnal Teknologi Mineral dan Batubara Edisi September 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No3.2024.1563

Abstract

PT. Bukit Asam Tbk provides BA 50 type coal to be sent to the Bukit Asam Tanjung Enim PLTU. The aim of this research is to obtain coal that suits the needs of the Bukit Asam Tanjung Enim PLTU. The method used is to simulate the blending of several types of coal at PT. Bukit Asam Tbk such as mine brand AL 49, mine brand AL 51, mine brand AL 53 and mine brand AL 55. The blending method uses the stack arrangement method with the layer arrangement method using the layered method. The research results show that the blending  simulation consists of 11 types of blending, four of which cannot be used as recommendations because they have a higher calorific value than BA 50. Of the seven recommended simulations, the AL 49 AL 51 simulation has the highest profit price value compared to the agreed selling price, namely $0.38 per ton and $1,157.55 per day or equal to IDR 18,216,357.16 per day. In this research, it is not only recommended to blend coal with two types of coal of different qualities, but innovation is carried out by blending which can be done with more than two types of coal of different qualities.
KESESUAIAN BATUBARA LAPISAN D UNTUK PROSES GASIFIKASI BAWAH PERMUKAAN Salinita, Silti; Purnama, Asep Bahtiar; Yuniardi, Yuyun; Nurdrajat; Sendjaja, Yoga A.
Jurnal Teknologi Mineral dan Batubara Vol 20 No 3 (2024): Jurnal Teknologi Mineral dan Batubara Edisi September 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No3.2024.1575

Abstract

Coal seam D is part of the Suban Burung Block, Muara Enim Formation, Central Palembang Subbasin, South Sumatra Basin, and is dated to the Middle to Late Miocene. The aims of this study is to determine the suitability of coal characteristics for (UCG) technology. The research was conducted on coal samples from seam D obtained from drilling during Underground Coal Gasification activities that utilized using the maceral composition method for coal utilization. Several coal quality parameter were tested, including calorific value, vitrinite reflectance, total sulfur content, ash content, total moisture content, ash fusion temperature, alkali oxide content (Na₂O + K₂O), maceral composition (vitrinite, liptinite, and inertinite), volatile matter content, as well as carbon and hydrogen content. Additionaly, to assess its applicability for UCG, the parameters of coal seam thickness and depth were also considered. The study results indicate that the characteristics of coal seam D has suitable for normative combustion and gasification using a fixed bed gasifier, a process similar to underground coal gasification. The thickness and depth of coal seam D are suitable for the application of Underground Coal Gasification (UCG) technology.
RESISTENSI AZOTOBACTER TERHADAP MERKURI DAN PENGARUHNYA PADA PERTUMBUHAN JAGUNG (ZEA MAYS L.) DI TAILING TAMBANG EMAS Hindersah, Reginawanti; Adawiah, Aliya Zahrah; Suryatmana, Pujawati; Dewi, Triyani
Jurnal Teknologi Mineral dan Batubara Vol 20 No 3 (2024): Jurnal Teknologi Mineral dan Batubara Edisi September 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No3.2024.1590

Abstract

Rhizobacteria from the N-fixing Azotobacter genera can be used as bioremediation agents. Azotobacter produces exopolysaccharides (EPS) that chelate heavy metals and synthesize metabolites to promote plant growth. This research aimed to analyze the resistance of the Azotobacter consortium isolated from tailings contaminated with mercury (Hg) in synthesizing secondary metabolites in liquid cultures contaminated with Hg, as well as the effect of the Azotobacter consortium on corn growth in various tailings-based media compositions containing Hg. The Hg resistance test was carried out using a completely randomized design with 100, 200, and 400 mg/L HgCl2 in N-free media. The greenhouse experiment was designed in a randomized block design to treat various concentrations of organic matter in the tailings. The results showed that Azotobacter isolates were able to survive in Ashby broth containing Hg up to 400 mg/L, and the consortium produced significant amounts of auxin, gibberellin, cytokinin, oxalic acid, citric acid, and EPS. In addition, Azotobacter increased corn growth in Hg-contaminated tailings with the addition of 6:4 compost (tailings: compost). Azotobacter is resistant to Hg up to 400 mg/L; as a consortium, it can produce secondary metabolites and has a good influence on the growth of corn in tailings containing Hg.
KARAKTERISTIK GEOKIMIA LEMPUNG DAN KUALITASNYA SEBAGAI PENJERNIH MINYAK SAWIT DI KABUPATEN SUKABUMI, JAWA BARAT Insan, Rachmatulloh; Hutabarat, Johanes; Haryanto, Agus Didit
Jurnal Teknologi Mineral dan Batubara Vol 20 No 3 (2024): Jurnal Teknologi Mineral dan Batubara Edisi September 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No3.2024.1597

Abstract

Before palm oil can be consumed, it must be processed through several processes, one of them is purification. To obtain an oil colour corresponds to a certain quality, a bleaching process is required using a bleaching agent or bleaching earth (BE). Material of palm oil purifier is made from clay. Clay is often found in Sukabumi Regency, West Java Province in Jampang Formation Cikarang Member and Lengkong Formation. The purpose of this research is to obtain a geochemical description and to determine the chemical composition of clay minerals in Jampang Formation Cikarang Member and Lengkong Formation and its effect on surface area properties and bleaching performance. This research used five clay samples, three samples from Jampang Formation Cikarang Member and two sampels from Lengkong Formation. To obtain geochemical characteristics composition, each sample was analyzed using XRD, SEM and XRF methods, meanwhile, to obtain information on the quality of palm oil clarifier, surface spesific area of the clay was measured using SAA and the color index of the palm oil that had been filtered by each clay sample was measured using the Lovibond Tintometer. The results showed that there was correlation between montmorillonite content to surface area value and bleaching performance of the clay. The larger the surface area of the clay, the higher its bleaching ability for palm oil. In addition, the surface area of the clay is also related to its montmorillonite content. Clay samples with high surface area, namely sample FJ-1 with a surface area of 111.5 m²/g and FJ-2 with a surface area of 106.4 m²/g, have higher montmorillonite content, specifically 67.2 and 70.7% compared to samples FJ-3, FL-1, and FL-2, which have montmorillonite contents of 17.4%, 47.4%, and 32.9%. Therefore, to obtain high-quality clay as a bleaching earth (BE) for the palm oil industry, clay with a high montmorillonite mineral content should be used.
INVESTIGASI KEBERADAAN DAN KETERKAITAN UNSUR KELUMIT PADA BATUBARA FORMASI MANUMBAR PIT Y-2 DI CEKUNGAN KUTAI, KALIMANTAN TIMUR Gibran, Akhmad Khahlil; Prasetyo, Ezza Ray Raditya; Purwasatriya, Eko Bayu; Mulyanto, Didik Jati
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.No1.2025.1481

Abstract

The Kutai Basin, renowned as a coal-bearing basin, ranks among the largest basins in Indonesia. Coal consists of various constituents, including major elements, trace elements, macerals, mineral impurities, and other components. The purpose of this research is to conduct a more in-depth analysis of the content of coal, with a specific focus on trace components. This study aimed to investigate the features, potential, enrichment of trace elements, and their correlation with the total sulfur and ash content in coal. An examination using ICP-OES (Inductively Coupled Plasma – Optical Emission Spectrometer) was conducted on 11 coal seams from Y-2 PIT. This analysis aimed to identify the level of trace elements, main elements, total sulfur, and ash content in the coal. The study's findings revealed that the elements' distribution and characteristics on the chemostratigraphy analysis chart were categorized into five distinct features, subsequently represented as chemozone. Moreover, it is established that the area with the highest potential is chemozone 3, where all trace elements undergo substantial enrichment within this region. It is well-established that several trace elements exhibit a positive correlation with changes in the overall sulfur and ash content of coal. The trace elements shown to be positive correlation linked to variations in the overall sulfur level are Cd, Mn, and Pb. On the other hand, the elements Cr, Cu, Pb, and V are tied positive correlation with changes in the ash content value. This study expands our understanding of the distribution and concentration of trace elements in coal from Indonesia's largest coal producing area. This data can be utilized to create more precise geochemical and stratigraphic models in the future.
PREDIKSI CURAH HUJAAN MENGGUNAKAN METODE E. J. GUMBEL UNTUK RENCANA SISTEM PENYALIRAN TAMBANG Nurfajar, Ilham Rifki; Purwana, Rachmadhi; Soelarno, Soemarno W.
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.No1.2025.1526

Abstract

The Tailings Storage Facility (TSF) is one of the largest constructions in mining activities involving sediment ponds that is an important and common facility used in mining activities. This study aims to recommend safe and environmentally friendly water management in settling ponds. This research is done by analyzing rainfall using E. J. Gumbel Method and designing a mine drainage system. The prediction results produce a maximum rainfall of 20.99 mm/day and a rain intensity value of 7.28 mm/hour. The catchment area is 380,355 m2 and the total runoff water discharge is 0.64 m3/second. Runoff water enters the settling pond with a volume of 2,438 m3/day. The capacity of the 3 (three) compartments of settling ponds is 4,500 m3 and an area of 500 m2.
IDENTIFIKASI FAKTOR PENGHAMBAT KEBERHASILAN REKLAMASI LAHAN BEKAS TAMBANG: STUDI KASUS PADA PERUSAHAAN PERTAMBANGAN MANGAN DI TIMOR BARAT Binus, Martinus; Mudita, I Wayan; Wulakada, Hamza H.
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.No1.2025.1582

Abstract

Reclamation of ex-mining land is an obligation that must be carried out by every mining business actors, in order to organize, restore, and improve the quality of the environment and ecosystem so that it can function again according to its designation. However, this obligation has not been carried out consistently by manganese mining companies in West Timor. Based on the results of supervision carried out by mining inspectors, no company has carried out reclamation. This study aims to identify factors that influence the implementation of reclamation governance for ex-mining manganese land in West Timor. Case studies were conducted on eigth location of Izin Usaha Pertambangan (IUP) in West Timor, East Nusa Tenggara Province. Data collection was carried out through questionnaires, interviews, and field observations. Furthermore, data analysis used qualitative descriptive methods. The results of the study indicate that the inhibiting factors for achieving successful reclamation of ex-mining land in West Timor are the licensing process, supervision, competence of mining business actors, and community involvement. In this regard, further research is needed to examine the form of reclamation that is in accordance with the conditions of ex-mining manganese land in West Timor.

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