Bandung Conference Series: Mining Engineering最新文献

{"title":"Kajian Kelayakan Ekonomi pada Kegiatan Hauling Tambang Tanah Liat PT Indocement Tunggal Prakarsa TBK Blok Pabuaran di Kecamatan Sukamakmur Kabupaten Bogor Provinsi Jawa Barat","authors":"Syaefan Abdillah Gunawan, Zaenal, Indra Karna Wijaksana","doi":"10.29313/bcsme.v3i2.9308","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.9308","url":null,"abstract":"Abstract. PT Indocement Tunggal Prakarsa Tbk is a company engaged in cement manufacturing. One of the cement's raw materials is clay, and PT Indocement will establish a new clay mining block located in Pabuaran Village, Sukamakmur District, Bogor Regency. Therefore, an economic feasibility study is required to plan the necessary production costs to address the hauling activities. The objective of this research is to determine production costs, investment costs, Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PBP), and sensitivity analysis. The research methodology is divided into three stages: the data collection process, which involves both primary and secondary data obtained from the company's Feasibility Study (FS) documents and several published journals. The gathered data is used to calculate operational costs, production costs, investment costs, cash flow, and to obtain NPV, IRR, PBP, and sensitivity analysis values. In the final stage, the data analysis is conducted based on NPV, IRR, and PBP values. The research findings indicate that the total required capital for the project is Rp 3,805,761,584, with fixed capital of Rp 2,083,647,427, and working capital of Rp 1,722,114,157. Based on the cash flow analysis, the obtained IRR value is 23.7%, exceeding the minimum IRR threshold of 11.9%. The NPV value for a 10-year mine life results in a profit of Rp 3,072,732,250, with a payback period of 4 years and 11 months. \u0000Abstrak. PT Indocement Tunggal Prakarsa Tbk merupakan sebuah perusahaan yang bergerak di bidang pembuatan semen. Salah satu bahan campuran semen adalah tanah liat dan PT Indocement akan membuat blok penambangan tanah liat baru yang berlokasi di Desa Pabuaran, Kecamatan Sukamakmur, Kabupaten Bogor, sehingga diperlukan pengkajian kelayakan ekonomi untuk merencakan biaya produksi yang diperlukan dalam memecahkan permasalahan kegiatan hauling yang akan dilakukan. Tujuan dari penelitian ini yaitu untuk mengetahui biaya produksi, biaya investasi, nilai Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PBP) dan analisis sensitivitas. Metode penelitian yang dilakukan terbagi menjadi 3 tahapan, yaitu proses pengambilan data yang terdiri dari data primer dan data sekunder yang berasal dari dokumen Feasibility Study (FS) perusahaan dan dari beberapa jurnal yang telah dipublikasi. Data yang telah dikumpulkan untuk memperhitungan biaya operasional, biaya produksi, biaya investasi, aliran kas dan didapatkan nilai NPV, IRR, PBP dan Analisis sensitivitas. Tahapan terakhir yaitu proses analisis data hasil pengolahan berdasarkan pada nilai NPV, IRR, dan PBP. Dari hasil penelitian didapatkan bahwa modal keseluruhan yang diperlukan sebesar Rp 3.805.761.584 dengan rincian modal tetap sebesar Rp 2.083.647.427 dan modal kerja sebesar Rp 1.722.114.157. Berdasarkan aliran kas maka nilai IRR yang didapat sebesar 23,7% dan sudah melebihi nilai IRR minimum sebesar 11,9%. Nilai NPV yang didapat untuk umur tambang ","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127612756","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 pada Penambangan Sirtu CV Billiant Ningrat di Kecamatan Leles Kabupaten Garut Provinsi Jawa Barat","authors":"Nopian Sukmana, Zaenal, I. Wijaksana","doi":"10.29313/bcsme.v3i2.9219","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.9219","url":null,"abstract":"Abstract. CV Brilliant Ningrat is a sirtu commodity mining company in Leles District, Garut Regency, West Java Province. The company conducted a study to test the economic feasibility of mining and prospect reserves at the location. In investment analysis, the required data includes initial investment costs and annual mining targets. The Discounted Cash Flow Rate of Return (DCFROR) method is used to analyze economic feasibility by calculating Net Present Value (NPV), Internal Rate Of Return (IRR), and Payback Period (PBP). The results of the analysis show that CV Brilliant Ningrat is economically feasible, because the NPV is Rp83,058,107,084, the IRR is 46.3%, and the PBP is about 2.76 years. A positive NPV value indicates a favorable rate of return on investment, IRR exceeds the minimum expected rate, and PBP is smaller than the mine life, so the investment is considered profitable. Furthermore, a sensitivity analysis was conducted to test the impact of changes in selling prices and production costs on economic viability. The results show that the company risks incurring losses if the selling price falls by 24% and production costs remain fixed. Conversely, if the selling price increases by 76% and production costs remain fixed, the company will also incur a loss. In conclusion, the results of the economic feasibility analysis show that CV Brilliant Ningrat can be considered a profitable investment, but it is necessary to pay attention to resilience to fluctuations in selling prices and production costs. The use of primary and secondary data and analysis using the DCFROR method have provided important information for making investment decisions in the future. \u0000Abstrak. CV Brilliant Ningrat adalah perusahaan pertambangan komoditas sirtu di Kecamatan Leles, Kabupaten Garut, Provinsi Jawa Barat. Perusahaan ini melakukan penelitian untuk menguji kelayakan ekonomi tambang dan prospek cadangan di lokasi tersebut. Dalam analisis investasi, data yang diperlukan meliputi biaya investasi awal dan target penambangan tahunan. Metode Discounted Cash Flow Rate of Return (DCFROR) digunakan untuk menganalisis kelayakan ekonomi dengan menghitung Net Present Value (NPV), Internal Rate Of Return (IRR), dan Payback Period (PBP). Hasil analisis menunjukkan bahwa CV Brilliant Ningrat layak secara ekonomi, karena NPV sebesar Rp83.058.107.084, IRR sebesar 46,3%, dan PBP sekitar 2,76 tahun. Nilai NPV yang positif menandakan tingkat pengembalian investasi yang menguntungkan, IRR melebihi tingkat minimum yang diharapkan, dan PBP lebih kecil dari umur tambang, sehingga investasi dianggap menguntungkan. Selanjutnya, dilakukan analisis sensitivitas untuk menguji dampak perubahan harga jual dan biaya produksi terhadap kelayakan ekonomi. Hasilnya menunjukkan bahwa perusahaan berisiko mengalami kerugian jika harga jual turun hingga 24% dan biaya produksi tetap. Sebaliknya, jika harga jual naik hingga 76% dan biaya produksi tetap, perusahaan juga akan mengalami kerugian. Dalam k","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114721861","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":"Manajemen Stockpile untuk Mencegah Terjadinya Self-Combustion di PLTU Banten 2 Labuan OMU","authors":"Fajar Khoerul Alam, Solihin, Yunus Ashari","doi":"10.29313/bcsme.v3i2.9218","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.9218","url":null,"abstract":"Abstract. PLTU Banten 2 Labuan OMU is a power plant company with the main fuel source being coal with calories 4000-4900 Kcal/kg with a land area of ​​64.45 Ha. This PLTU has a capacity of 2x300 MW of electricity. Self-combustion occurs due to the reaction of the carbon content in coal with oxygen gas in the air. The problem that arises in the Banten 2 Labuan OMU PLTU stockpile is the frequent occurrence of self-burning due to the ineffective implementation of the FIFO (Frist In Frist Out) management system. The sampling technique for stockpile temperature data was carried out at 12 stockpile 1 points of LRC and 12 points of stockpile 2 MRC, observing three sides of the coal pile, namely the west, south and east sides. Where each side of the sample measurement is taken at a thickness of 1, 3, 5, and 7 meters and the 0 meter point is taken from the ground floor of the stockpile. To see the comparison of temperature to embankment time and embankment dimensions at each measurement point with a certain thickness. From all the research conducted, the stockpile had 2 stockpiles of coal, stockpile 1 LRC (Low Rank Calorie) with quality <4200 and stockpile 2 MRC (Medium Rank Calorie) with quality >4200. The height of the stockpile reaches 10.9 meters for stock 1 and 9.6 meters for stock 2, the slope angle of the stockpile is 55.6° for stock 1 and 52.5°. Stockpile 1 has a temperature rise of 3.4°C/day and stockpile 2 has a temperature rise of 3.2. The estimated self-combustion for stockpile 1 is 4 days, while for stockpile 2 it is 5 days, meaning that the coal quality affects self-combustion where stockpile 2 takes 1 day longer than stockpile 1 \u0000Abstrak. PLTU Banten 2 Labuan OMU merupakan suatu perusahaan pembangkit listrik dengan sumber  bahan bakar utama batubara dengan kalori 4000-4900 Kcal/kg memiliki luas lahan 64,45 Ha. PLTU ini memiliki kapasitas listrik yang dihasilkan 2x300 MW Self-Combustion terjadi karena adanya reaksi kandungan karbon pada batubara dengan gas oksigen di udara. Permasalahan yang muncul pada stockpile PLTU Banten 2 Labuan OMU ini, sering terjadinya swabakar yang disebabkan karena kurang efektifnya penerapan sistem manajemen FIFO (Frist In Frist Out). Teknis pengambilan sempel data suhu timbunan ini dilakukan sebanyak 12 titik stockpile 1 LRC dan 12 titik stockpile 2 MRC, pengamatan pada tiga sisi timbunan batubara yaitu sisi barat, selatan dan timur. Di mana setiap sisi pengukuran sampel diambil pada ketebalan 1, 3, 5, dan 7 meter dan titik 0 meter pengukuran dilakukan dari lantai dasar stockpile. Untuk melihat perbandingan suhu terhadap lama timbunan dan dimensi timbunan pada setiap titik pengukuran dengan ketebalan tertentu. Dari seluruh penelitian yang dilakukan kondisi stockpile memiliki 2 timbunan batubara, stockpile 1 LRC (Low Rank Calorie) dengan kualitas <4200 dan stockpile 2 MRC (Medium Rank Calorie) dengan kualitas >4200. Ketinggian timbunan mencapai 10,9 meter untuk stock 1 dan 9,6 meter untuk stock 2, sudut kemiringan","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122939455","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 Pengaruh Fraksi Bijih Massive Silica dari Uji Pulverized Bottle Roll Test","authors":"Muhammad Selgy Rio Auzza Maisano Saifudin, Solihin, Linda Pulungan","doi":"10.29313/bcsme.v3i2.8652","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.8652","url":null,"abstract":"Abstract. Copper which has many benefits in everyday life makes people look for several methods to extract copper in accordance with the intent and purpose of its use, the purpose of this test is to determine the % recovery value of the ore characteristic of massive silica by using fine ore leaching and considering the variation of the ore fraction used. In determining the % recovery of the ore to be tested, the sizes are 100#, 150# and 200# with a NaCN concentration of 500 ppm. Apart from the ore fraction and NaCN concentration, the leaching time will also be determined for 48 hours using a PBRT (Pulverized Bottle Roll Test). Samples taken are in the form of a solution which will be analyzed for Cu levels using an AAS (Atomic Absorption Spectrometer). Based on the results obtained in this test when viewed from the time used in sampling, the optimum % recovery is obtained at 24 – 48 hours when viewed from the ore fraction parameters used in this test, for Massive Silica rocks the highest % copper recovery is 54.1% with leaching time of 48 hours at 100# fraction and 500 ppm NaCN concentration. \u0000Abstrak. Tembaga yang memiliki manfaat yang banyak dalam kehidupan sehari-hari menjadikan manusia mencari beberapa metode untuk mengekstrak tembaga sesuai dengan maksud dan tujuan penggunaannya, tujuan dari pengujian ini untuk mengetahui nilai % recovery dari bijih karakteristik massive silica dengan menggunakan pelindian bijih halus dan mempertimbangkan variasi dari fraksi bijih yang digunakan. Dalam menentukan % recovery dari bijih yang akan di uji ukuran yaitu 100#, 150# dan 200# dengan konsentrasi NaCN 500 ppm. Selain dari fraksi bijih dan konsentrasi NaCN, waktu pelindian juga juga akan ditetapkan selama 48 jam dengan menggunakan PBRT (Pulverized Bottle Roll Test), sampel yang diambil berbentuk solution yang akan di lakukan analisis terhadap kadar Cu dengan menggunakan alat AAS (Atomic Absorption Spectrometer). Berdasarkan hasil yang didapat dalam pengujian ini jika dilihat dari waktu yang digunakan dalam pengambilan sampel maka % recovery yang optimum didapat pada waktu 24 – 48 jam jika dilihat dari parameter fraksi bijih yang digunakan dalam pengujian ini, untuk batuan Massive Silica % recovery tembaga yang terbesar yaitu 54,1% dengan waktu pelindian 48 jam pada fraksi 100# dan konsentrasi NaCN 500 ppm.","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126332066","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 F pada Tambang Batubara PT XYZ di Kabupaten Merangin Provinsi Jambi","authors":"Muhammad Rizky Picauly, Elfida Moralista, Zaenal","doi":"10.29313/bcsme.v3i2.8629","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.8629","url":null,"abstract":"Abstract. Conveyors are the most widely used means of transporting raw materials in the mining industry, which are used to move excavated materials from the previous location to the next location, such as a stockpile. The conveyor structure used is made of carbon steel which is susceptible to corrosion. This research was conducted on the structure conveyor along 114 meters divided into 3 segments with 25 test points. This study aims to determine the type of corrosion, corrosion control, corrosion rate and the remaining life of the structure conveyor. The research was conducted on a 114 meter long conveyor structure which was divided into 3 segments and 25 test points, with a service life of 7 years and a design life of 15 years. The research methodology is the measurement of the thickness reduction of the conveyor structure. The actual thickness has a value ranging from 7.66-12.19mm measured with the Ultrasonic Thickness Gauge TT 130. Environmental data is in the form of rainfall data for 2015- 2019 with an average of 236.83 mm/year, average air temperature of 27.83°C and an average relative humidity of 85.60 %. The type of corrosion that occurs in the structure conveyor is uniform corrosion. The corrosion control method applied to the conveyor structure is the coating method with a primer coating Seaguard 5000, Intermediate coating Sherglass FF and top coating Aliphatic acrylic modified polyurethane. The corrosion rate of the structure conveyor ranges from 0.186-0.334 mm/year. \u0000Abstrak. Conveyor merupakan alat angkut raw material yang paling banyak dipakai di industri pertambangan yang digunakan untuk memindahkan material bahan galian dari tempat sebelumnya ke tempatnya selanjutnya seperti stockpile. Struktur conveyor yang digunakan adalah berbahan dasar baja karbon yang rentan terhadap korosi. Tujuan penelitian ini adalah untuk mengetahui jenis korosi, metode pengendalian korosi, laju korosi dan sisa umur pakai struktur conveyor. Penelitian dilakukan pada struktur conveyor sepanjang 114 meter yang dibagi menjadi 3 segmen dan 25 test point, dengan umur pakai 7 tahun dan umur desain 15 tahun. Metodologi penelitian adalah pengukuran pengurangan ketebalan struktur conveyor. Tebal aktual mempunyai nilai berkisar 7,66-12,19mm diukur dengan alat ukur Ultrasonic Thickness Gauge TT 130. Data lingkungan berupa data curah hujan tahun 2015-2019 dengan rata-rata 236,83 mm/tahun, suhu udara rata-rata 27,83 C dan kelembaban relatif rata-rata 85,60 %. Pada penelitian ini jenis korosi yang terjadi pada struktur conveyor yaitu korosi merata. Metode perlapisan ini menggunakan sistem 3 lapisan anti korosi yang terdiri dari lapisan primer Seaguard 5000, lapisan antara Sherglass FF dan lapisan atas Aliphatic acrylic modified polyurethane. Laju korosi struktur conveyor yaitu 0,186-0,334 mm/tahun.","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114197326","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":"Pengaruh Bidang Diskontinu Terhadap Potensi Longsoran Baji pada Lereng Tambang Terbuka di PT Indocement Tunggal Prakarsa Desa Palimanan, Kecamatan Gempol, Kabupaten Cirebon, Provinsi Jawa Barat","authors":"Muhammad Rois Daeng Abdullah, Yuliadi, Iswandaru","doi":"10.29313/bcsme.v3i2.8222","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.8222","url":null,"abstract":"Abstract. PT Indocement is a company engaged in the mining sector with limestone as a commodity commodity. The mining method at the company uses an open pit mining method with a quarry system. Mining geotechnical is mining technical management which includes investigation, sample testing, and management of geotechnical data as well as application of recommendations on the geometry and dimensions of mine openings, as well as monitoring the stability of mine openings (Kepmen ESDM No. 1827 K/30/MEM, 2018). The stability of open pit slopes is an important factor to support continuity of production, worker safety and mining equipment. The type and potential for landslides on a slope can be determined by the position of the slope and the geological structure. Geological structure data is obtained from the results of measuring the structure directly on the face of the slope combined with the position of the slope to analyze the condition of the slope with kinematic analysis. The purpose of this study is to determine the effect of discontinuous planes on the potential for wedge avalanches in open pit mines in the study area. From the results of research on the potential for landslides that commonly occur in the quarry in the study area, namely the type of wedge avalanche. Abstrak. PT Indocement adalah perusahaan yang bergerak di bidang pertambangan dengan komoditas bahan galian batugamping. Metode penambangan pada perusahaan tersebut menggunakan metode tambang terbuka dengan sistem kuari. Geoteknik tambang adalah pengelolaan teknis pertambangan yang meliputi penyelidikan, pengujian conto, dan pengelolaan data geoteknik serta penerapan rekomendasi geometri dan dimensi bukaan tambang, serta pemantauan kestabilan bukaan tambang (Kepmen ESDM No. 1827 K/30/MEM, 2018). Kestabilan lereng tambang terbuka merupakan salah satu faktor penting untuk menunjang kelangsungan produksi, keselamatan pekerja dan peralatan tambang. Jenis dan potensi longsoran pada lereng dapat ditentukan oleh kedudukan lereng dan struktur geologi. Data struktur geologi diperoleh dari hasil pengukuran struktur secara langsung di muka lereng yang dikombinasi dengan kedudukan lereng untuk menganalisis kondisi lereng dengan analisis kinematik. Tujuan dari penelitian ini yaitu untuk mengetahui pengaruh bidang diskontinu terhadap potensi longsoran baji pada tambang terbuka pada daerah penelitian. Dari hasil penelitian potensi longsoran yang umum terjadi pada kuari daerah penelitian yaitu jenis longsoran baji.","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115739993","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":"Pemanfaatan Fly Ash dan Bottom Ash (FABA) sebagai Campuran Media Tanam di PT Bukit Asam, Tbk Tanjung Enim Sumatera Selatan","authors":"Firhan Ali, Sri Widayati, Dudi Nasrudin Usman","doi":"10.29313/bcsme.v3i2.8858","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.8858","url":null,"abstract":"Abstract. Coal is a fossil fuel that is available in large quantities in Indonesia. The process of burning coal produces waste in the form of fly ash and bottom ash (FABA) which if allowed to accumulate for a long time can cause problems for the environment and living things. This study aims to utilize coal ash waste as a mixture of planting media to reduce environmental pollution. The research was conducted on tomato and chili plants by observing the growth of these plants. In this study, there were three comparisons of the composition of the planting media mixture used, namely 85% soil (T85%) and 15% faba (FB15), 65% soil (T65%) and 35% faba (FB35%), and 50% soil (T50). %) and 50% faba (FB50%). The comparison of the three compositions recommended for mixed planting media is the composition of T50% and FB50%. Because it can optimize waste and plant growth results are not much different from the other two compositions. The composition made with different levels of faba content makes chili and tomato plants grow at levels of 50%, this can increase the use of waste that has been wasted and is very economical if this faba is used as a mixture of planting media. \u0000Abstrak. Batubara merupakan bahan bakar fosil yang tersedia dalam jumlah banyak di Indonesia. Proses pembakaran batubara menghasilkan limbah berupa fly ash dan bottom ash (FABA) yang mana apabila dibiarkan menumpuk dalam waktu yang lama dapat menimbulkan masalah bagi lingkungan dan makhluk hidup. Penelitian ini bertujuan untuk memanfaatkan limbah abu batubara untuk campuran media tanam agar dapat mengurangi pencemaran lingkungan. Penelitian dilakukan pada tanaman tomat dan cabai dengan mengamati pertumbuhan tanaman tersebut. Dalam penelitian ini komposisi campuran media tanam yang digunakan ada tiga pembanding yaitu tanah 85% (T85%) dan faba 15% (FB15), tanah 65% (T65%) dan faba 35% (FB35%), serta tanah 50% (T50%) dan faba 50% (FB50%). Perbandingan tiga komposisi yang direkomendasikan untuk campuran media tanam adalah komposisi T50% dan FB50%. Karena dapat mengoptimalkan limbah serta hasil pertumbuhan tanamannya tidak jauh berbeda dari kedua komposisi lainnya. Komposisi yang dibuat dengan tingkatan kadar faba yang berbeda membuat keberhasilan pada tanaman cabai dan tomat bisa tumbuh dengan kadar sebesar 50%, hal ini bisa meningkatkan penggunakan limbah yang sudah terbuang serta sangat ekonomis bila faba ini menjadi campuran media tanam.","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125265620","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":"Penentuan Sisa Umur Pakai Struktur Conveyor F pada Tambang Batubara PT GHI di Kabupaten Tapin, Provinsi Kalimantan Selatan","authors":"Rizqi Saefulfikri, Elfida Moralista, Zaenal","doi":"10.29313/bcsme.v3i2.8638","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.8638","url":null,"abstract":"Abstract. In the mining industry, there is a means of transportation for the process of moving mining materials, such as coal, by using a conveyor structure. The structure of the conveyor is made of steel so it is prone to corrosion by reacting with the environment. Corrosion can cause a loss that can result in a reduction in the thickness of the conveyor structure. Therefore, it is necessary to carry out control activities to monitoring in observations on the conveyor structure so that corrosion can be prevented. This study aims to determine the type of corrosion, corrosion rate, remaining service life, and control methods on the conveyor structure. The research methodology used is measuring the thickness reduction of the conveyor structure. The research was conducted on a conveyor structure with a length of 90 meters and 25 test points above ground level. The instrument used in measuring the thickness of the conveyor structure is Ultrasonic Thickness Gauge TT 130. The environmental conditions in the research area are air temperature in the range of 31oC - 37oC, while rainfall is in the range of 6.05 - 11.23 mm/year. The type of corrosion that occurs in this conveyor structure is uniform corrosion. The corrosion control method applied is the coating method with the primary coating using Seaguard 5000, the intermediate coating using Sherglass FF, and the top coating using aliphatic acrylic modified polyurethane. The corrosion rate on this conveyor structure ranges from 0.1828 - 0.3028 mm/year. This value is included in the good category based on the relative corrosion resistance of steel. The residual value of the conveyor structure's service life ranges from 7.19 to 9.65 years. Based on the calculation of the remaining service life of the conveyor structure at 25 test points, there are 24% which are estimated to not be able to reach the design life of 15 years. \u0000Abstrak. Dalam industri pertambangan terdapat alat transportasi untuk melakukan pemindahan material hasil penambangan yaitu dengan menggunakan struktur conveyor. Struktur conveyor terbuat dari baja yang rawan mengalami korosi dan beraksi dengan lingkungan. Korosi dapat menimbulkan suatu kerugian yang dapat mengakibatkan pengurangan ketebalan pada struktur conveyor. Oleh karena itu, perlu dilakukan kegiatan pengendalian hingga monitoring pada struktur conveyor agar mencegah korosi. Penelitian ini bertujuan untuk mengetahui jenis korosi, laju korosi, sisa umur pakai, dan metoda pengendalian pada struktur conveyor. Metodologi penelitian yang digunakan adalah pengukuran pengurangan ketebalan struktur conveyor. Penelitian dilakukan terhadap struktur conveyor dengan panjang 90 meter dan 25 test point. Alat yang digunakan dalam pengukuran ketebalan struktur conveyor yaitu Ultrasonic Thickness Gauge TT 130. Kondisi lingkungan di daerah penelitian yaitu temperatur udara kisaran 31oC - 37oC, sedangkan curah hujan kisaran 6,05 - 11,23 mm/tahun. Jenis korosi yang terjadi pada struktur conveyor ini y","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129971811","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":"Rencana Teknis dan Ekonomis Reklamasi Tambang Andesit PT XYZ di Desa Lagadar, Kampung Leuwidulang, Kecamatan Margaasih Kabupaten Bandung, Provinsi Jawa Barat","authors":"Mestiya Gusjuliasih, Yunus Ashari, Zaenal","doi":"10.29313/bcsme.v3i2.8213","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.8213","url":null,"abstract":"Abstract. In the mining industry, reclamation activities are mandatory, because mining activities cause changes to the landscape and environmental damage. Reclamation is an activity to achieve achievements to make improvements regarding land that has experienced disturbances caused by mining activities. The existence of reclamation activities can be useful if adjusted to the requirements or designation. With the existence of reclamation activities, the aim is that the ex-mining land will be sustainable or green again. In order for reclamation activities to be optimal, it must involve several aspects including regarding technical and economic plans, because optimal reclamation results can restore soil conditions to be stable and can be grown with plants. The purpose of reclamation is to develop technical and economic plans, to make reclamation activities run efficiently and to know the total price for reclamation needs. Reclamation activities at PT XYZ will be carried out in one period with an area to be reclaimed of 3,42 Ha according to the area of the mine opening. Technical plan activities will use mechanical devices, namely the Komatsu PC200 Excavator, the Hino FM260JD Dump Truck, and the Komatsu D85A-21 Bulldozer. The main crops used in the revegetation activities are upland rice, corn, and interplants in the form of peanut trees. The reclamation technical plan that will be carried out is up to the stage of maintenance and maintenance in order to achieve the success criteria in reclamation. Treatment is carried out by embroidering and applying insecticides or weeding to the main plants and insert plants. The total cost of the reclamation plan resulting from this technical plan is IDR 690.309.497,-. \u0000Abstrak. Dalam industri pertambangan kegiatan reklamasi adalah hal yang wajib untuk dilakukan, karena kegiatan penambangan menyebabkan perubahan pada bentang alam dan kerusakan lingkungan. Reklamasi adalah kegiatan untuk meraih pencapaian untuk melakukan perbaikan mengenai lahan yang telah mengalami gangguan yang disebabkan oleh kegiatan pertambangan. Adanya kegiatan reklamasi dapat berguna apabila disesuaikan dengan persyaratan ataupun peruntukannya. Dengan adanya kegiatan reklamasi bertujuan agar lahan bekas pertambangan akan lestari atau hijau kembali lingkungannya. Agar kegiatan reklamasi menjadi optimal, maka harus melibatkan beberapa aspek, diantaranya mengenai rencana teknis dan ekonomis, karena hasil reklamasi yang optimal dapat mengembalikan kondisi tanah menjadi stabil dan dapat ditumbuhi dengan tanaman. Tujuan dilakukan reklamasi dengan menyusun rencana teknis dan ekonomis, dapat membuat kegiatan reklamasi berjalan dengan efesien dan dapat diketahui total harga untuk kebutuhan reklamasi. Kegiatan reklamasi pada PT XYZ akan dilakukan dalam satu periode dengan luas yang akan direklamasi sebesar 3,42 Ha sesuai dengan luasan bukaan tambang. Kegiatan rencana teknis akan menggunakan alat mekanis yaitu satu unit Backhoe Komatsu PC200, tiga uni","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126369321","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 G pada Tambang Batubara PT GHI di Kabupaten Banjar Provinsi Kalimantan Selatan","authors":"Azi Faturahman Fachreza, Elfida Moralista, Zaenal","doi":"10.29313/bcsme.v3i2.8581","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.8581","url":null,"abstract":"Abstract. Conveyor is a conveyance used to move coal from one place to another continuously. The conveyor is supported by a static building structure made of carbon steel. Carbon steel is used because it is strong and resistant to temperature and pressure, but is susceptible to corrosion due to the influence of its environment. This research was conducted to determine the type of corrosion, corrosion control methods, Corrosion Rate, and Remaining Service Life of the conveyor structure.This research uses the thickness reduction measurement method. Measurements are made to determine the actual thickness of the conveyor structure which has a design life of 15 years and a service life of 7 years.  The conveyor structure is above ground level, and has a length of 94 meters which is divided into 3 segments and 25 test points. Measurements were taken using a smart sensor ultrasonic thickness gauge TT 130.The type of corrosion that occurs on the conveyor structure is uniform corrosion. The corrosion control method used is a coating method with a three-layer system using Seaguard 5000 as a primary coating, Sherglass FF as an intermediate coating, and Aliphatic acrylic modified polyurethane as a top coating. Corrosion Rates that occur at each test point range from 0.1543 - 0.2843 mm / year which falls into the \"Good\" category based on the relative corrosion resistance of steel. Remaining Service Life of the conveyor structure ranges from 9.73 - 12.43 years which shows that all test points are predicted to reach their design life. \u0000Abstrak. Conveyor merupakan suatu alat angkut yang digunakan untuk memindahkan material dari suatu tempat ke tempat lainnya secara continue. Conveyor tersebut didukung oleh adanya suatu struktur bangunan statis yang terbuat dari baja karbon. Baja karbon digunakan karena sifatnya yang kuat dan tahan terhadap temperatur dan tekanan, namun rentan untuk mengalami korosi akibat dari pengaruh lingkungannya. Penelitian ini dilakukan untuk mengetahui jenis korosi, metode pengendalian korosi, Corrosion Rate dan Remaining Service Life struktur conveyor. Penelitian ini menggunakan metode pengukuran pengurangan ketebalan. Pengukuran dilakukan untuk mengetahui tebal aktual struktur conveyor yang memiliki umur desain 15 tahun dan umur pakai 7 tahun.  Struktur conveyor berada di atas permukaan tanah dan memiliki panjang 94 meter yang dibagi ke dalam 3 segmen dan 25 test point. Pengukuran tebal aktual dilakukan menggunakan alat Smart Sensor Ultrasonic Thickness Gauge TT 130. Jenis korosi yang terjadi pada struktur conveyor adalah korosi merata. Metode pengendalian korosi yang digunakan adalah metode coating dengan sistem Three layers, yaitu Seaguard 5000 sebagai primer coating, Sherglass FF sebagai intermediate coating dan Aliphatic acrylic modified polyurethane sebagai top coating. Corrosion Rate yang terjadi pada tiap test point berkisar antara 0,1543 – 0,2843 mm/tahun yang termasuk ke dalam kategori “good” berdasarkan ketahanan korosi relatif","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129545035","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}