Article Per Year (5 Year)
p-Index From 2019 - 2024
1.583
P-Index
This Author published in this journals
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

Published : 10 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 10 Documents
Search

 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)

Show Abstract | Download Original | Original Source | Check in Google Scholar

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)

Show Abstract | Download Original | Original Source | Check in Google Scholar

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)

Show Abstract | Download Original | Original Source | Check in Google Scholar

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.
Penerapan Sistem Kesehatan Dan Keselamatan Kerja Menggunakan Metode Strenght Dan Weakness Di PT Energi Cahaya Industritama Samarinda Provinsi Kalimantan Timur Siti Fadlah Musarofah; Agus Winarno; Henny Magdalena; Windhu Nugroho; Lucia Litha Respati
MINERAL Vol 7 No 2 (2022): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v7i2.3363

Abstract

Research on the application of the OHS system is carried out with the aim of analyzing things in the application of K3. The research method uses a descriptive method in the form of a questionnaire. The results of the research questionnaire the highest percentage included in the strength (strenght) including the use of PPE 83.9% agreed that it was applied followed in an orderly manner, promotions and strategies and the application of K3 64.5% strongly agreed, the existence of PPE training that was applied 74.2% agree. The results of the weakness analysis (Weakness) that the highest percentage of the results of the questionnaire diagram are incomplete first aid facilities 80% agree, the workplace is not conducive, planning for implementing K3 strategies, providing emergency facilities for accidents 83.9%, periodic initial checks to employees 74.2% quite agree.
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)

Show Abstract | Download Original | Original Source | Check in Google Scholar

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)

Show Abstract | Download Original | Original Source | Check in Google Scholar

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
STUDI PERBANDINGAN NILAI KUAT GESER BATU LEMPUNG BERDASARKAN KONDISI JENUH, KONDISI NATURAL, DAN KONDISI KERING FORMASI PALAU BALANG MENGGUNAKAN METODE DIREC SHEAR DI KALIMANTAN TIMUR Irfan Irfan; Tommy Trides; Agus Winarno; Lucia Litha Respati; Shalaho Dina Devy
JOURNAL SCIENTIFIC OF MANDALIKA (JSM) e-ISSN 2745-5955 | p-ISSN 2809-0543 Vol. 4 No. 5 (2023): Mei
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/10.36312/vol4iss5pp51-61

Abstract

: Claystone is a rock that has a denser structure with more mineral composition than siltstone. In addition, claystone can also be interpreted as a type of sedimentary rock that is clay or plastic, composed of hydrous aluminum silica (a clay mineral) whose grain size is fine and the claystone is often easily destroyed in a short time when it is exposed to the surface and interacts with water. From the test results it can also be obtained a comparison of rock strength values between location 1 and location 2 by correlating the results of testing the physical properties and mechanical properties of each location where for location 1 has a natural water content value of 17.38% and a saturated water content of 24.39% with the cohesion value of claystone under natural conditions is 0.209 MPa, saturated conditions are 0.2105 MPa and dry conditions are 0.2517 MPa. Then for location 2 it has a natural water content value of 22.87% and a saturated water content of 32.84% with a claystone cohesion value of natural conditions of 0.0923MPa, saturated conditions of 0.0377MPa and dry conditions of 0.2099 MPa. It can be concluded that the claystone location 1 has a smaller water content presentation than the claystone location 2. It can be concluded that the water contained in the claystone greatly influences the strength of the claystone in resisting the forces received to experience a shift and also water affects the attractive force between claystone particles which makes the strength of the rock weak.
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)

Show Abstract | Download Original | Original Source | Check in Google Scholar

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.
PENGARUH NILAI KUAT TEKAN BATUPASIR TERHADAP PERBEDAAN KONDISI FISIK DI KOTA SAMARINDA PROVINSI KALIMANTAN TIMUR Ketut Swarningsih; Revia Oktaviani; Henny Magdalena; Tommy Trides; Lucia Litha Respati
PROMINE Vol 10 No 1 (2022): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v10i1.3273

Abstract

Rock strength is the ability of a rock to maintain its strength until it breaks when given force. The purpose of this study is to determine the comparison of rock strength values in different physical conditions, namely natural, saturated, dry conditions and 2 wet-dry cycles on sandstones by testing uniaxial compressive strength according to SNI standards 2825-2008. The results of compressive strength testing at two different locations showed that the condition of the rocks around the Samarinda region was weak to moderate, with strength values at location 1 ranging from 1.61 – 14.31 MPa and at location 2 ranging from 8.26 – 36.27 MPa. The Elastic Modulus obtained at location 1 ranges from 1.88 -18.60 and at location 2 it ranges from 8.26 – 37.928. The more to the West from the city of Samarinda, the strength of the rocks is increasing. With the treatment of rocks that undergo repeated wet-dry processes, it does not cause a decrease in rock strength compared to the condition of rocks undergoing saturation. This is because the amount of water content that is large enough in saturated conditions results in weakening of the rock. The lower the water content, the stronger a rock.
THE IMPACT OF AGLOMERATION METHOD FROM AQUADES AND WASTE COOKING OIL TO THE INCREASING OF THE CALORIFIC VALUE AT PT MEGAPRIMA PERSADA’S COAL IN PT SURVEYOR INDONESIA LABORATORY, SAMARINDA EAST KALIMANTAN) Hadis; Windhu Nugroho; Lucia Litha Respati; Agus Winarno; Shalaho Dina Devy
JOURNAL SCIENTIFIC OF MANDALIKA (JSM) e-ISSN 2745-5955 | p-ISSN 2809-0543 Vol. 4 No. 7 (2023): Juli
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/10.36312/vol4iss7pp82-90

Abstract

Coal is a fossil fuel that is formed from organic deposits. Coal reserves in Indonesia generally include low rank coal with a total moisture up to 40%. Coal with low ash and sulfur content can be obtained by utilizing oil and water which in this case is called agglomeration. In making agglomeration this time it is done by using waste cooking oil and aquades. The comparison used was 100 g of coal, 100 ml of distilled water and the variable that was distinguished was waste cooking oil, namely 20 ml, 30 ml and 40 ml. Proximate analysis results on coal obtained IM 11,93%, AC 7,04%, AC 39,79% and FC 41,24%. At 20 ml agglomeration obtained IM 0,47%, AC 6,04%, VM 51,94% and FC 41,55%. At 30 ml agglomeration, the value of IM is 0,37%, AC is 5,35%, VM is 67,38% and FC is 36,38%. At 40 ml agglomeration, the value of IM is 0,26%, AC is 4,76%, VM is 59,19% and FC is 35,79%.
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