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All Journal PROMINE JOURNAL SCIENTIFIC OF MANDALIKA (JSM) Journal Transformation of Mandalika MINERAL
Lucia Litha Respati
Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Mulawarman
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Other

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Journal : Journal Transformation of Mandalika

 1 
EVALUASI COAL RECOVERY PADA KEGIATAN PENAMBANGAN DARI PIT A MENUJU STOCKPILE DI PT. X (EVALUATION OF COAL RECOVERY IN MINING ACTIVITIES FROM PIT A TO STOCKPILE AT PT. X) Siti Maghfirah Azzahra; Harjuni Hasan; Revia Oktaviani; Agus Winarno; Lucia Litha Respati
JOURNAL TRANSFORMATION OF MANDALIKA (JTM) e-ISSN 2745-5882 p-ISSN 2962-2956 Vol. 3 No. 4 (2022): JOURNAL TRANSFORMATION OF MANDALIKA
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

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Abstract

Several coal companies apply a minimum target of coal recovery. Coal recovery is a comparison between the actual tonnage of coal production based on the data from the weighbridge and the coal tonnage as a result of survey measurements expressed as a percentage. The greater the coal recovery more effective the coal was mined. Loss of coal during the mining process was unavoidable. However, if the cause is known in detail, the amount of loss can be minimized by making efforts to repair the existing causes and can increase the value of coal recovery and the utilization of coal reserves owned by the company. There are 30 coal mining data. 19 of them still had a coal recovery below 96% with a total tonnage loss of 1.485,97 tonnes. There are 6 activity criteria that cause coal recovery, including the coal getting less than optimal and still leaves coal on front which accounts for 47,45% of the total loss, coal used as road coating accounts for 5,67%, survey measurement data is less representative the appearance of coal shapes accounted for 2,48%, errors naming on coal haulage coupons accounted for 9,77%, waterlogged fronts accounted for 29,64%, and recleaning accounted for 5,01% of the total tonnage loss.
ANALISIS BIAYA PENAMBANGAN BATUBARA BERDASARKAN NISBAH PENGUPASAN PADA PT. PANCARAN SURYA ABADI KEC. MUARA BADAK KAB. KUTAI KARTANEGARA KALIMANTAN TIMUR (ANALYSIS OF COAL MINING COSTS BASED ON THE STRIPPING RATIO AT PT. PANCARAN SURYA ABADI DISTRICTS M Nurfaysa; Harjuni Hasan; Henny Magdalena; Sakdillah; Lucia Litha Respati
JOURNAL TRANSFORMATION OF MANDALIKA (JTM) e-ISSN 2745-5882 p-ISSN 2962-2956 Vol. 3 No. 4 (2022): JOURNAL TRANSFORMATION OF MANDALIKA
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

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Abstract

Analysis of financial statements is an important step in assessing the value of the company. This research has a goal of determining mining costs based on the stripping ratio and the amount of profit obtained from the mining plan. In this study, the author uses an applied method with a quantitative analysis approach, where research demands the use of numbers, starting from data collection, interpretation of the data, and the appearance of the results which are presented in the form of mathematical calculation results. Coal production produced in 2021 is 305,100 MT/Year and Overburden production is 1,054,815 BCM/Year, so the coal production cost is Rp. 103,900.11/MT or $ 7.27/MT and an overburden fee of Rp. 41,176.94/BCM or $2.88/BCM. Based on the Reference Coal Price in 2021, after calculating the sales of domestic and export coal, the sales income of $26,532,614.30 for a year (2021) was obtained.
SINKRONISASI WORK ORDER OVERBURDEN REMOVAL ANTARA OWNER DENGAN KONTRAKTOR PT. KUTAI ENERGI KABUPATEN KUTAI KARTANEGARA PROVINSI KALIMANTAN TIMUR (Synchronization of Overburden Removal Work Order Between Owner and Contractor PT. Kutai Energy, Kutai Kartane Megawati AP; Harjuni Hasan; Agus Winarno; Tommy Trides; Lucia Litha Respati
JOURNAL TRANSFORMATION OF MANDALIKA (JTM) e-ISSN 2745-5882 p-ISSN 2962-2956 Vol. 3 No. 4 (2022): JOURNAL TRANSFORMATION OF MANDALIKA
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

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Abstract

Common problems in mining activities of PT. RPP Contractors Indonesia is a non-compliance with the realization of the mining plan. This discrepancy was discovered after reconciling the mining progress map with the draft mining plan at the end of June 2022. This research is very important by synchronizing the realization of the plan at the end of the month. The aim is to determine the form of non-conformance, calculate the volume of non-conformance, and analyze the factors causing the non-conformance to the plan. The research method used is to synchronize work orders between the owner and the contractor by reconciling the actual data in the field with the mine plan design and scheduling the digging and loading equipment so that it shows the percentage of the suitability of the plan with the actual. The results showed that the achievement for overburden stripping was 70% consisting of 60% on design, 10% overcut, and 40% undercut. The factors causing the failure are the number of units and the placement of the fleet, unit productivity, and supervision.
STUDI ADSORBSI LOGAM BESI (Fe) DAN MANGAN (Mn) PADA AIR ASAM TAMBANG OLEH KOMPOSIT: CLAYSTONE – ZEOLIT - KARBON AKTIF TERAKTIVASI ADSORPTION STUDY OF LOGAM BESI (Fe) AND MANGANESE (Mn) ON ACID MINE WATER BY CLAYSTONE COMPOSITE - ZEOLITE - ACTIVATED CARBO Emdananta Ginting; Shalaho Dina Devy; Henny Magdalena; Revia Oktaviani; Lucia Litha Respati
JOURNAL TRANSFORMATION OF MANDALIKA (JTM) e-ISSN 2745-5882 p-ISSN 2962-2956 Vol. 4 No. 1 (2023): JOURNAL TRANSFORMATION OF MANDALIKA
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

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Abstract

Composites are a combination of two or more different materials and their properties to form new materials that have better characteristics. The composite was previously composed of activated claystone, activated zeolite, and coconut shell activated charcoal with 3 ratios, namely: (claystone [C] : zeolite [Z] : activated charcoal [A] = 60:20:20; 20:20:60; and 20:60:20. This composite acts as an adsorbent in the adsorption process of acid mine water samples. Based on the results of the adsorption test, it was concluded that the composite cannot neutralize the pH of acid mine water. Of the three types of composites, Composite A (claystone [C] : zeolite [Z] : activated charcoal [A] = 60:20:20) showed a significant influence with a decrease in the concentration of heavy metals Iron and Manganese within 30 min of contact time. Fe adsorption capacity is 20,7 mg/g and Mn is 24,3 mg/g.
EVALUASI KINERJA UNIT COAL CRUSHING PLANT DALAM PENCAPAIAN PRODUKSI DI PT. ANUGERAH BARA KALTIM KABUPATEN KUTAI KARTANEGARA: (Performance Evaluation Of Coal Crushing Plant Unit In Production Achievement At Pt. Award Of Bara Kaltim, Kutai Kartanegara District) Al Mulyadi; Windhu Nugroho; Tommy Trides; Lucia Litha Respati; Agus Winarno
Journal Transformation of Mandalika Vol. 4 No. 1 (2023)
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

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Abstract

Coal handling facility (CHF) at PT. Anugerah Bara Kaltim, a mining company authorized to carry out coal crushing activities which is one of the determinant of the quantity of product to be produced to meet market need. However, problem often occur which prevent production target from being achieved. A technical study of the crushing plant unit is carried out and effort are made to minimize the obstacle that occur in coal crushing activitie. The production target for the coal crusher unit is 541,667 tons/month based on observations and calculation that have been carried out, the actual production obtained is only 519,305.85 tons/month. Production target that have not been achieved occur because the production of crushers is still low due to the obstacles that occur. From the result of research and calculations carried out to achieve production that is close to the production target of the coal crusher unit, efforts have been made to increase production, one of which is by improving non-technical barriers which can minimize the time delay. after repairing the inhibition time. The value of the availability of the coal crusher unit before repairing the drag time is as follows: mechanical availability (MA) = 95.28%, physical availability (PA) = 88.79%, equipment use availability (UA) = 95.75%, effective use (EU ) = 85.00 %. Handling that can be done by adding bait in June is 26,381.38 tons with an additional 35 times repetition in June, and in July adding bait to achieve the production target of 32,939.06 tons with an additional 44 times repetition in July with handling time delays and feed handling, the production target of the coal crusher unit at PT. ABK can be fulfilled
PENJADWALAN KERJA MOTOR GRADER GD14M MENGGUNAKAN METODE URCI UNTUK PENINGKATAN PRODUKSI ALAT ANGKUT DI PIT 2 BANKO BARAT PT. BUKIT ASAM, Tbk, TANJUNG ENIM SUMATERA SELATAN Fery Ferdiansyah; Harjuni Hasan; Lucia Litha Respati; Agus Winarno; Tommy Trides
Journal Transformation of Mandalika Vol. 4 No. 5 (2023)
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

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Abstract

PT Bukit Asam is one of the world-class energy companies engaged in coal mining. PT Bukit Asam has several mining locations, one of which is Pit 2 Banko Barat Mine that utilizes a truck and shovel mining system. The transportation route for coal production is a crucial aspect in the coal mining operation at Banko Barat Mine. To ensure the proper functioning of the transportation route, a reliable Motor Grader is required. This research discusses the performance of Caterpillar 14M3 motor grader. The objectives of this research are to determine the utilization of hauling equipment downtime, establish the work scheduling of the motor grader for haul road maintenance, and assess the productivity of hauling equipment before and after road maintenance. The actual road conditions are determined by measuring the resistance value using the URCI assessment. The cycle time of DT Kamaz 6520 hauling equipment decreased from 29.93 minutes to 26.88 minutes after maintenance. The scheduling of the motor grader in Pit 2 is prioritized for maintenance as follows: segment 1 every 150 minutes, segment 2 every 120 minutes, segment 3 every 129 minutes, segment 4 every 205 minutes, segment 5 every 180 minutes, segment 6 every 560 minutes, segment 7 every 67.2 minutes, segment 8 every 71.3 minutes, segment 9 every 300 minutes, segment 10 every 92 minutes, segment 11 every 65 minutes, and segment 12 every 324 minutes. The productivity of Kamaz 6520 dump truck increased from 42.30 tons/hour to 47.10 tons/hour after maintenance.
Co-Authors Agus Winarno Al Mulyadi Devy, Shalaho Dina Emdananta Ginting Fery Ferdiansyah Hadis Harjuni Hasan Henny Magdalena Irfan Irfan Ketut Swarningsih Megawati AP Nurfaysa Revia Oktaviani Revia Oktaviani Sakdillah Shalaho Dina Devy Siti Fadlah Musarofah Siti Maghfirah Azzahra Tommy Trides Tommy Trides Tommy Trides Tommy Trides Tommy Trides Windhu Nugroho Windhu Nugroho Windhu Nugroho windhu