Bandung Conference Series: Mining Engineering最新文献

{"title":"Evaluasi Teknis dan Ekonomis dalam Merencanakan Penggantian Alat Angkut pada Pengupasan Overburden di PT Citra Mitra Sehati Site Job PT Bama Ketahun Desa Tanjung Dalam, Kecamatan Ulok Kupai, Kabupaten Bengkulu Utara, Provinsi Bengkulu","authors":"Dandi Leroy Tandri, Iswandaru, I. Wijaksana","doi":"10.29313/bcsme.v3i1.7010","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.7010","url":null,"abstract":"Abstract. In its production activities, PT Citra Mitra Sehati uses 1 unit of Doosan Dx 500 diggers which have been used for production for 2 years, and 5 units of the new ADT Volvo A40E hauling equipment which has been in operation for 8 years. The condition of mechanical devices that are classified as old and unfit for operation because they often break down and require special maintenance and the greater the operating costs of the equipment, of course affects productivity and production which will decrease. Therefore, so that the mining activities carried out are not disturbed due to equipment problems that are often damaged, it is necessary to replace the equipment. In planning the replacement of mechanical devices, it is necessary to carry out technical and economic studies. For technical studies, it includes studies on the production of equipment, as well as for economic studies, it includes operating costs, ownership costs, Present Worth Cost values and Production Unit Cost values. The purpose of this study was to determine the comparison of the production of old equipment and new equipment, and economic comparisons including operating costs, ownership costs, Present Worth Cost and Production Unit Cost values. The research method used in this research includes the collection of primary data and secondary data. The primary data in this study are working time, volume of excavator bucket material, circulation time, holding time, in-situ density testing, density loose testing, and haul road data. Secondary data in this study are equipment specifications, fuel prices, lubricating oil prices, filter prices, tool life, trade in value, depreciation, tax and insurance, inflation, and interest rates. From primary and secondary data, it is calculated so as to get the results of production values, operating costs, ownership costs, Present Worth Cost and Production Unit Cost for old equipment and new equipment. From the results of a technical study conducted, the old conveyance has a work efficiency of 82.09% with a production of 916.135,48BCM/year, while the new conveyance has a work efficiency of 85.53% with a production of 1,131,547.20 BCM/year. The results of the economic study showed that the operating costs of the old transportation equipment were IDR 3,241,306,604.79/year, and the operating costs for new transportation equipment were IDR 2,537,653,411.82 / year. In addition, the results of the calculation of the Production Unit Cost of the old transportation equipment were Rp. 7.365,17/BCM while for the new transportation equipment, it was Rp. Rp 2.725,38/BCM. Based on the results of the technical and economic studies, the digging and loading equipment needs to be replaced because the productivity of the new equipment is higher and has lower operating costs than the old equipment. From the calculation of the Unit Cost Production, it is known that the new digging-loading and hauling equipment is more economical than the old equipment, and has a be","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131465790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kajian Ekonomis pada Penambangan Pasir CV Barokah Laksana Jaya di Kecamatan Leles, Kabupaten Garut, Provinsi Jawa Barat","authors":"Muhammad Daffa Naufaldy, Zaenal, I. Wijaksana","doi":"10.29313/bcsme.v3i1.7014","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.7014","url":null,"abstract":"Abstract. CV Barokah Laksana Jaya is a company engaged in the sandstone mining sector which is located in Leles District, Garut Regency, West Java Province. This research was conducted because the company needed an economic analysis study to obtain profit value and economic feasibility, so that it could proceed to the feasibility study stage and obtain a Production Operation Mining Business Permit. Economic analysis in this study is used to obtain the value of investment capital and production costs, Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PBP) and sensitivity analysis. Economic studies are expected to be able to see the feasibility of an investment that can be used in the form of net profit in the future NPV, IRR, PBP. The data collection technique used uses primary data and secondary data which are then processed using the Discounted Cash Flow Rate of Return (DCFROR) method to obtain NPV, IRR and PBP values. The economic study will be compared with the economic feasibility to get the final result in the form of the economic feasibility of the company. After obtaining the economic feasibility results, a sensitivity analysis is carried out based on the increase in production costs and the decrease in selling prices. The research results were obtained based on the economic studies studied, namely obtaining an NPV of IDR 4,785,181,088 and obtaining a minimum IRR value of 10.35% through the calculation of the Weighted Average Cost of Capital (WACC) and a maximum IRR value of 27.30%. The time to get a return on capital or PBP value is 4.42 years or 4 years and 3 months. Sensitivity analysis was carried out by looking at the parameters of increasing production costs and decreasing selling prices. The results of the sensitivity analysis showed that the maximum increase in production costs was 16%, so the company would suffer a loss. Meanwhile, a decrease in the selling price of 6% will make the company suffer a loss. The results of the comparison of the sensitivity analysis show that the selling price value factor has decreased, which will have a large effect on the profits obtained compared to the increased production costs. \u0000Abstrak. CV Barokah Laksana Jaya merupakan perusahaan yang bergerak di bidang Pertambangan batupasir yang terletak di Kecamatan Leles, Kabupaten Garut Provinsi Jawa Barat. Penelitian ini dilakukan dikarenakan perusahaan tersebut memerlukan kajian analisis ekonomi untuk mendapatkan nilai keuntungan dan kelayakan ekonomi, sehingga dapat melanjutkan ke tahap studi kelayakan dan mendapatkan Izin Usaha Pertambangan Operasi Produksi. Analisis ekonomi pada penelitian ini digunakan untuk mendapatkan nilai modal investasi dan biaya produksi, Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PBP) dan analisis sensitivitas. Kajian ekonomi diharapkan mampu melihat kelayakan investasi yang dapat digunakan dalam bentuk keuntungan bersih di masa yang akan datang dalam bentuk NPV, IRR, serta ","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114637884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kajian Teknis Alat Muat dan Alat Angkut untuk Meningkatkan Produksi pada Penambangan Andesit PT Arto Bangun Cemerlang di Kecamatan Tanjungsari, Kabupaten Bogor, Provinsi Jawa Barat","authors":"Shania Wulanda Sari, Zaenal, Sriyanti","doi":"10.29313/bcsme.v3i1.6604","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.6604","url":null,"abstract":"Abstract. PT Arto Bangun Cemerlang is a private mining company engaged in mining andesite minerals located in Garogol Village, Sirnarasa Village, Tanjungsari District, Bogor Regency, West Java Province. The total area is ± 50 Ha with a production target of 25,000 tons/month or 9,803.92 BCM/month, the production target has not been achieved. The products produced by this company consist of 3 products, namely split stone, stone ash and screening, where the marketing of these products is allocated to various areas in Jabodetabek, such as Serpong, Citeureup, Kasabalangka Karawaci, Karawang and Pulau Gadung. In mining activities there are several factors that influence the unachieved production of loading and hauling equipment. This is caused by the high tool cycle time, delay time and improper loading pattern. In this study, it discusses efforts to increase production in loading and conveyance equipment. The loading equipment for the Sany SY215 Excavator and the transport equipment use the Isuzu Giga Tronton Type FV 285 Dump Truck. The effort made is to reduce the cycle time of the loading equipment by changing the bottom loading pattern to top loading. Barrier time is the time for the loading and unloading equipment to not produce, the drag time for the conveyance and unloading equipment can be seen based on the work efficiency of the loading and unloading equipment. The work efficiency of the loading equipment is 62.31% and the work efficiency of the transportation equipment is 89.34%. Based on the results of work efficiency of loading and transport equipment, loading equipment has more waiting time compared to transportation equipment because of the high stand by time on transportation equipment compared to loading equipment. Based on actual production data on the Sany SY215 Excavator loading equipment of 9,475.2 BCM/month and the transportation equipment with 3 units of Isuzu Giga Tronton Type FV 285 Dump Trucks, namely 9,455.04 BCM/month. As for some improvements made such as the pattern of loading and reducing the cycle time (circulation time) of loading and hauling equipment. After the repairs were carried out, there was an increase in production of loading and conveyance equipment, where the production of loading and unloading equipment after repairs was 11,037.6 BCM/month and 11,022.48 BCM/month for conveyances. \u0000Abstrak. PT Arto Bangun Cemerlang merupakan perusahaan tambang swasta yang bergerak pada bidang pertambangan bahan galian andesit yang berlokasi di Kampung Garogol, Desa Sirnarasa, Kecamatan Tanjungsari, Kabupaten Bogor Provinsi Jawa Barat. Luas wilayah keseluruhan ± 50 Ha dengan target produksi 25.000 Ton/bulan atau 9.803,92 BCM/bulan, target produksi tersebut belum tercapai.  Produk yang dihasilkan perusahaan ini terdiri dari 3 produk yaitu batu split, abu batu dan screening, dimana pemasaran dari produk tersebut dialokasikan ke berbagai daerah di Jabodetabek, seperti Serpong, Citeureup, Kasabalangka Karawaci, Karawang dan Pulau G","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129570595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aplikasi Penginderaan Jauh (Remote Sensing) untuk Identifikasi Zona Potensi Keberadaan Emas Epitermal PT DEF di Kecamatan Simpenan Kabupaten Sukabumi, Provinsi Jawa Barat","authors":"Deden Manzil Franandy, N. F. Isniarno, Zaenal","doi":"10.29313/bcsme.v3i1.7006","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.7006","url":null,"abstract":"Abstract. The development of today's technology has increased, for example information technology in exploration activities. One of them is the Remote Sensing method, where this method is included in indirect exploration. Remote sensing is useful in identifying potential zones of mineral deposits by means of data interpretation. Hydrothermal alteration is a process of mineralogy, chemical and textural changes that occur in rocks caused by the interaction of hot fluids with the rocks they pass through. The alteration process is a form of metasomatism, namely the exchange of chemical components between fluids and rock walls. Although the interaction of hot fluids with assistance is an interrelated factor, temperature and fluid chemistry are probably the most influential factors in the hydrothermal alteration process. Hydrothermal alteration in epithermal systems does not depend much on wall rock composition, but is controlled more by rock gradient, temperature and fluid composition. Based on the interpretation of Landsat 8 imagery, hydrothermal alteration minerals are known for their light orange appearance. If the potential alteration areas are digitized and then combined with a lineament pattern, it will show that the distribution of lattered rocks tends to follow the lineament pattern, but some are out of lineament. Most of the alteration area is in alignment with the northwestern direction of the research area. The alteration zone is a zone associated with epithermal gold mineralization. Based on the mapping of the potential for gold mineralization that has been carried out using the lithology, structure, and alteration approaches, the results of the overlay or merger show that the area with the potential for gold mineralization is in the Northwest of the study area, with a total area of ​​distribution of potential mineralization, namely 57.92 ha. \u0000Abstrak. Perkembangan zaman sekarang teknologi mengalami peningkatan, contohnya teknologi informasi dalam kegiatan eksplorasi. Salah satunya teknologi  metode Penginderaan Jauh (Remote Sensing), dimana metode ini termasuk ke dalam eksplorasi tak langsung. Penginderaan Jauh berguna dalam mengidentifikasi zona potensi endapan bahan galian dengan cara interpretasi data. Alterasi hidrotermal adalah suatu proses perubahan mineralogi, kimiawi dan tekstur yang terjadi pada batuan yang disebabkan oleh interaksi fluida panas dengan batuan yang dilaluinya. Proses alterasi merupakan suatu bentuk metasomatisme, yaitu pertukaran komponen kimiawi antara cairan-cairan dengan batuan dinding. Walaupun interaksi fluida panas dengan bantuan merupakan faktor yang saling terkait, tetapi temperatur dan kimia fluida kemungkinan merupakan faktor yang paling berpengaruh pada proses alterasi hidrotermal. Alterasi hidrotermal pada sistem epitermal tidak banyak bergantung pada komposisi batuan dinding, akan tetapi lebih dikontrol oleh kelulusan batuan, temperatur dan komposisi fluida. Berdasarkan hasil interpretasi Citra Landsa","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"695 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116115954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kajian Rencana Teknis dan Anggaran Biaya Reklamasi Tambang pada Penambangan Nikel PT Manusela Prima Mining di Desa Piru, Kabupaten Seram Bagian Barat, Provinsi Maluku","authors":"Muhammad Faiq Syahdan Banama, Zaenal, Noor Fauzi Isniarno","doi":"10.29313/bcsme.v3i1.6161","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.6161","url":null,"abstract":"Abstract. PT Manusela Prima Mining is a company engaged in nickel mining located in Piru Village, West Seram Regency, Maluku Province. Land that has been mined will be reclamated with the stages of land arrangement, revegetation, maintenance to plant maintenance and the total cost of reclamation. The purpose of this research is to find out the technical plans for land management, revegetation and care and maintenance in areas of former nickel mining activities. The data that will be needed is the productivity of mechanical equipment, reclamation area, compaction material (topsoil and overburden), land planning time, fuel data, revegetation costs, to be able to find out the total reclamation budget. The technical scheme plan for land use stewardship from 2023-2029 will be carried out in an area of ​​reclamation area and in accordance with a mining land area of ​​8.78 Ha. The stages of land use stewardship were carried out using Kobelco SK200 Excavator mechanical devices, Komatsu D85E-SS Bulldozers and Hino 500-FM260TI Dumptrucks with a requirement of 131,700 LCM topsoil compaction material and 439,000 LCM overburden. Then the revegetation stage uses staple crops in the form of acacia trees (Acacia mangium), insert plants in the form of cashew trees (Anacardium occidentale) and banana trees (Parkia speciose) and for cover crops in the form of nuts (mucuna bracteate). This plan will be carried out up to the maintenance and care stage to achieve 100% success for reclamation activities. Based on the research results, it can be concluded that PT Manusela Prima Mining with a mining business license (IUP) ends in 2029 and reclamation activities last until 2029 with a total reclamation budget of Rp 2,594,925,351. Abstrak. PT Manusela Prima Mining merupakan perusahaan yang bergerak di bidang pertambangan nikel yang berlokasi di Desa Piru, Kabupaten Seram Bagian Barat, Provinsi Maluku. Lahan yang sudah ditambang akan dilakukan reklamasi dengan tahapan penataan lahan, revegetasi, perawatan hingga pemeliharaan tanaman dan total biaya reklamasi. Tujuan dari penelitian ini agar dapat mengetahui rencana teknis penataan lahan, revegetasi serta perawatan dan pemeliharaan pada area bekas kegiatan penambangan nikel. Data yang akan dibutuhkan yaitu produktivitas alat mekanis, luas lahan reklamasi, material pemadatan (topsoil dan overburden), waktu penataan lahan, data bahan bakar, biaya revegetasi, untuk dapat mengetahui anggaran biaya total reklamasi. Rencana skema teknis untuk penatagunaan lahan dari tahun 2023-2029 yang dilakukan pada luas area reklamasi dan sesuai dengan luas lahan penambangan sebesar 8,78 Ha. Tahapan penatagunaan lahan di lakukan dengan menggunakan alat mekanis Excavator Kobelco SK200, Bulldozer Komatsu D85E-SS dan Dumptruck Hino 500-FM260TI dengan kebutuhan material pemadatan topsoil 131.700 LCM dan overburden 439.000 LCM. Kemudian tahapan revegetasi menggunakan tanaman pokok berupa pohon akasia (acacia mangium), tanaman sisipan berupa pohon ","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121143089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monitoring Korosi Discharge Conveyor E pada Tambang Batubara PT XYZ di Kabupaten Sarolangun, Provinsi Jambi","authors":"Aristu Eka Adrian, Elfida Moralista, Zaenal","doi":"10.29313/bcsme.v3i1.5692","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5692","url":null,"abstract":"Abstract. Conveyors structure made from carbon steel are susceptible to corrosion which will reduce the quality of the material. The corrosion that occurs will affect the Remaining Service Life on the conveyor structure. Therefore, the purpose of this research is to determine the type of corrosion, corrosion control that is applied to the conveyor structure, the value of Corrosion Rate and Remaining Service Life.The measurement methodology for the 142 meter long conveyor structure  consisting of 4 segments with 32 test points was carried out based on the thickness reduction method. Measurement of the actual thickness of the conveyor structure was carried out using an Ultrasonic Thickness Gauge TT 130. In this study, observations of environmental conditions in 2016-2020 showed that the average air temperature data was 25.34oC, average rainfall was 209.97 mm/year and 86.92% relative humidity. The type of corrosion that occurs on the conveyor structure is uniform corrosion. The corrosion control method applied to the conveyor structure is the coating method with a three-layer system using Seaguard 5000 primer coating, Sherglass FF intermediate coating, and Aliphatic acrylic modified polyurethane top coating. Based on data on reducing the thickness of the conveyor structure with values ranging from 1.31-2.35 mm, a Corrosion Rate is obtained with a value of 0.1871-0.3357 mm/year, based on the table of relative corrosion resistance of steel this value is included in the good category. The service life of the conveyor structure is 7 years with a Remaining Service Life value ranging from 6.58-9.01 years. Therefore there are 14 or 43.75% of the 32 test points which are predicted not to reach the design life of 15 years. \u0000Abstrak. Struktur Conveyor berbahan dasar baja  karbon rentan mengalami terjadinya korosi yang akan mengurangi kualitas material.. Korosi yang terjadi akan berpengaruh terhadap Remaining Service Life pada struktur conveyor. Maka dari itu tujuan dilakukannya penelitian ini untuk mengetahui jenis korosi, pengendalian korosi yang diaplikasikan pada struktur conveyor, nilai Corrosion Rate dan Remaining Service Life. Metodologi pengukuran pada struktur conveyor sepanjang 142 meter yang terdiri dari 4 segmen dengan 32 test point dilakukan berdasarkan metode pengurangan ketebalan. Pengukuran tebal aktual struktur conveyor dilakukan dengan menggunakan alat Ultrasonic Thickness Gauge TT  130. Pada  penelitian  ini,  pengamatan  kondisi  lingkungan pada tahun 2016-2020 menunjukan bahwa data  temperatur  udara  rata-rata  25,34oC, curah hujan rata-rata 209,97 mm/tahun dan  kelembapan  relatif  86,92%.  Jenis korosi  yang  terjadi pada struktur conveyor yaitu  korosi  merata. Metode  pengendalian  korosi yang  diaplikasikan  pada  struktur conveyor yaitu  metode  coating dengan sistem three layer system menggunakan primer coating Seaguard 5000, intermediate coating Sherglass FF, dan top coating Aliphatic acrylic modified polyurethane. Berdasarkan dat","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121997799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analisis Kebutuhan Kapur Tohor dalam Menetralkan Air Asam Tambang di PT ABC Kalimantan Timur","authors":"Wahyu Guntoro, Sri Widayati, Dudi Nasrudin Usman","doi":"10.29313/bcsme.v3i1.5713","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5713","url":null,"abstract":"Abstract. Based on the Decree of the Minister of Environment and Forestry No. 5 of 2022 concerning Wastewater Treatment for Mining Businesses or Activities related to acid mine water treatment, the water must be handled so that the water quality becomes neutral and meets the specified quality standards. The research was conducted by taking some data in the form of quality and discharge of acid mine drainage to be tested in the laboratory in order to obtain the values ​​of pH, TSS, and chemical elements. Analysis of the calculation of the molarity of acid mine drainage and neutralizing agent (quicklime) was carried out to determine the mixing dose, which aims to neutralize acid mine water properly. Analysis results show that the actual neutralization of acid mine drainage requires 0.148 g/liter with an average daily requirement of 10.710,3535 gr or 16,551 kg. The most appropriate treatment is carried out with an active curative approach by direct sprinkling quicklime into the inlet channel so that it can be mixed more evenly when it enters the settling pond. \u0000Abstrak. Berdasarkan kepada Keputusan Menteri Lingungan Hidup dan Kehutanan No 5 Tahun 2022 tentang Pengolahan Air Limbah Bagi Usaha Dan/Atau Kegiatan Pertambangan dengan yang berkaitan dengan pengolahan air asam tambang, maka air tersebut harus dilakukan penanganan agar kualitas air menjadi netral dan memenuhi baku mutu yang telah ditentukan. Penelitian ini dilakukan dengan metode pengambilan beberapa data berupa kualitas dan debit air asam tambang untuk diuji laboratorium agar mendapatkan nilai pH, TSS, dan unsur kimiawi. Analisis perhitungan molaritas air asam tambang dan agen penetral (kapur tohor) dilakukan untuk mengetahui dosis pencampuran, yang bertujuan agar air asam tambang dapat dinetralkan dengan tepat. Hasil analisis menunjukan bahwa penetralan air asam tambang secara aktual membutuhkan 0,148 gr/liter dengan kebutuhan rata- rata perhari sebesar 169.551,242 gr atau 169,551 kg. Penanggulangan paling tepat dilakukan dengan pendekatan kuratif metode aktif, dengan cara menaburkan langsung kapur tohor ke dalam saluran inlet agar dapat tercampur lebih merata ketika masuk ke kolam pengendapan.","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"03 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129774626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Remaining Service Life Discharge Conveyor E pada Tambang Batubara di PT XYZ Kabupaten Bungo, Provinsi Jambi","authors":"Sandy Renaldi, Elfida Moralista, Noor Fauzi Isniarno","doi":"10.29313/bcsme.v3i1.5617","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5617","url":null,"abstract":"Abstract. Conveyor is a tool that is applied to the mining industry as a tool that supports the process of moving excavated materials such as coal. The structure of the conveyor is made of steel which is subject to corrosion. The disadvantage of corrosion is that it results in a reduction in the thickness of the conveyor structure. Therefore, it is necessary to control and monitor corrosion on the conveyor structure to be observed, so that corrosion can be controlled. The purpose of this research is to determine the type of corrosion, corrosion rate, remaining service life, and control methods. The methodology used in this research is measuring the thickness reduction of the conveyor structure. This research was conducted on a 128 meter long conveyor structure above ground level. Measurement of the thickness of the conveyor structure using the Ultrasonic Thickness Gauge TT 130 at 32 test points. The environmental conditions in the research area are the air temperature in the range of 24,5°C – 26,1°C, while the rainfall ranges from 5,76 mm/year - 7,88 mm/ year. The type of corrosion that occurs in the conveyor structure is uniform corrosion. In controlling this corrosion using a coating method with Seaguard 5000 primer coating, Sherglass FF intermediate coating, and aliphatic acrylic modified polyurethane top coating. The corrosion rate of the conveyor structure ranges from 0.17 - 0.30 mm/year which is included in the good category based on the relative corrosion resistance of steel. Meanwhile, the remaining service life of the conveyor structure ranges from 7,24 - 9,63 years. The service life of the conveyor structure is 8 years, while the design life is 15 years. So it is predicted that 100% can reach its the design life. \u0000Abstrak. Conveyor adalah alat yang diaplikasikan pada industri pertambangan sebagai alat yang menunjang dalam proses pemindahan material bahan galian contohnya batubara. Struktur conveyor terbuat dari baja karbon yang dapat mengalami korosi. Kerugian terjadinya korosi yaitu mengakibatkan pengurangan ketebalan struktur conveyor. Oleh karena itu, perlu dilakukannya pengendalian serta monitoring korosi pada struktur conveyor, sehingga korosi dapat dikendalikan. Tujuan dilakukannya penelitian ini untuk mengetahui jenis korosi, laju korosi, sisa umur pakai, dan metoda pengendaliannya. Metodologi yang digunakan dalam penelitian ini yaitu pengukuran pengurangan ketebalan struktur conveyor. Penelitian ini dilakukan pada struktur conveyor sepanjang 128 meter yang berada di atas permukaan tanah. Pengukuran ketebalan struktur conveyor menggunakan alat Ultrasonic Thickness Gauge TT 130 pada 32 test point. Kondisi lingkungan di daerah penelitian yaitu temperatur udara kisaran 24,5°C - 26,1°C, sedangkan curah hujan kisaran 5,76 mm/tahun - 7,88 mm/tahun Jenis korosi yang terjadi pada struktur conveyor adalah korosi merata. Dalam pengendalian korosi ini menggunakan metoda coating dengan primer coating Seaguard 5000, intermediate coating Sherg","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121319664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analisa Keserasian Armada untuk Mencapai Produksi Armada yang Optimum di PT Nunukan Bara Sentosa Satu, Desa Sebakis, Kecamatan Nunukan, Kabupaten Nunukan, Provinsi Kalimantan Utara","authors":"Muhamad Awaludin, Iswandaru, Noor Fauzi Isniarno","doi":"10.29313/bcsme.v3i1.5486","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5486","url":null,"abstract":"Abstract. PT Nunukan Bara Santosa Satu (NBSS) is a private company owned by Medco Minning with commodities that produce coal, mining, processing and further marketing of coal commodities located in Sebakis Village, Nunukan District, Nunukan Regency, North Kalimantan Province, to support the mining process, at the Ambu site using a means of transportation with the Sany SKT 90 Dump Truck type with a Sany 750H digging tool, with the open pit open pit mining method, so that in all mining activities there are factors that are difficult to avoid, namely the weather, if it rains it will result in The cessation of production was due to the condition of the road being still soiled and the handling of the slipperly still lacking units, but this can be covered by sunny weather conditions. For this reason, this study has the aim of being able to analyze fleet macth for optimum productivity by minimizing obstacles that occur such as hauling roads that are not standardized by the Ministerial Decree No. 1827/K/30/MEM/2018, slipperly handling, road maintenance, front maintenance, truck queue which results in high cycle times that occur.The percentage of achievement of the productivity target based on the planned overburden stripping in July was 545,669 Bcm. Meanwhile, based on the actual results, only 222,276 BCM. The result is less than half of the plan that has been targeted. One of the causes of not achieving the production target is in the location preparation mechanism, lack of supervision, the number of breakdown units, the effect of site preparation and the effect of the compatibility of the number of equipment.From the observations in the field and the calculation of the compatibility factor between the excavator and the dumptruck, it was found that the MF result was 0.94 < 1, meaning that the excavator loading equipment worked less than 100% while the dumptruck transportation equipment worked 100%, so there was a waiting time for the loading equipment. Thus, if optimization is carried out on the effective work of the tool, evaluation of working hours and selection of healthy units can increase production results so that targets can be met. \u0000Abstrak. PT Nunukan Bara Santosa Satu (NBSS) adalah badan usaha swasta milik Medco Minning dengan komoditas yang penghasil batubara, kegiatan penambangan, pengolahan serta lebih lanjut melakukan pemasaran dari komoditas batubara yang terletak di Desa Sebakis, Kecamatan Nunukan, Kabupaten Nunukan, Provinsi Kalimantan Utara, untuk menunjang proses penambangan, pada site Ambu menggunakan alat angkut dengan jenis Dump Truck Sany SKT 90 dengan alat gali muat Sany 750H, dengan metode tambang terbuka open pit, sehingga dalam seluruh kegiatan penambangan terdapat faktor yang sulit untuk dihindari yaitu cuaca, jika terjadinya hujan akan mengakibatkan berhentinya produksi dikarenakan dengan kondisi jalan yang masih tanah serta dalam penanganan sliperly nya masih kekurangan unit, akan tetapi hal tersebut bisa ditutupi dengan ko","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121630121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analisis Investasi dan Kelayakan Ekonomi Penambangan Batu Gamping PT Akarna Marindo di Kecamatan Cipatat, Kabupaten Bandung Barat, Provinsi Jawa Barat","authors":"Kevin Zen Rizal Pratama, Zaenal, Indra Karna Wijaksana","doi":"10.29313/bcsme.v3i1.5207","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5207","url":null,"abstract":"Abstract. PT Akarna Marindo is one of the companies engaged in mining with the commodity of limestone in Cipatat Village, Cipatat District, West Bandung Regency, West Java Province. It is necessary to carry out an analysis of the investment and economic feasibility of the mine to fulfill one of the requirements in extending the ongoing mining business permit. The economic analysis used is based on production costs, investment costs, cash flow and income from the sale of limestone. Considering this, an economic analysis is carried out based on the concept of Discontinued Cash Flow Rate of Return (DCFROR) and sensitivity analysis. The economic criteria used are Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PBP), as well as sensitivity analysis of selling prices and production costs. DCFROR analysis is one of the analytical techniques related to investment, by calculating the value of money against the discount rate using the Weighted Average Cost of Capital (WACC) method which is 8.00%. Then the cash flow calculation is carried out every year to evaluate the cash value based on cash inflows and cash disbursements generated during mining activities. The results of the DCFROR analysis that has been carried out, obtained an NPV value of IDR 5,011,899,460, -, an IRR of 18.60% and a PBP for 3 years and 6 months. It is necessary to evaluate the value of investment uncertainty by determining the level of profit obtained based on changes in various sensitivity parameters. The parameters used in this analysis are selling prices and production costs to the NPV value due to changes in selling prices and production costs. The results of the sensitivity analysis show that selling prices have decreased by more than 8% and production costs have increased by more than 22%. \u0000Abstrak. PT Akarna Marindo merupakan salah satu perusahaan yang bergerak dalam bidang pertambangan dengan komoditi batu gamping di Desa Cipatat, Kecamatan Cipatat, Kabupaten Bandung Barat, Provinsi Jawa Barat. Perlu dilakukan analisis investasi dan kelayakan ekonomi tambang untuk memenuhi salah satu syarat dalam memperpanjang izin usaha penambangan yang sedang berlangsung. Analisis ekonomi yang digunakan berdasar pada biaya produksi, biaya investasi, aliran kas dan pendapatan dari penjualan batu gamping. Mempertimbangkan hal tersebut, maka dilakukan analisis ekonomi berdasarkan pada konsep Discontinued Cash Flow Rate of Return (DCFROR) dan analisis sensitivitas. Kriteria ekonomi yang digunakan adalah Net Present Value (NPV), Internal Rate of Return (IRR), Payback Periode (PBP), serta analisis sensitivitas terhadap harga jual dan biaya produksi. Analisis DCFROR menjadi salah satu teknik analisis yang berhubungan dengan investasi, menghitung nilai uang terhadap discount rate menggunakan metode Weighted Average Cost of Capital (WACC) yang didapat sebesar 8,00%. Kemudian perhitungan aliran kas dilakukan setiap tahun untuk mengevaluasi nilai kas berdasar pada pemasukan kas ","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"60 1-2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132363933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}