Bandung Conference Series: Mining Engineering最新文献

{"title":"Remaining Service Life Struktur Conveyor C pada Tambang Batubara PT XYZ di Kabupaten Tanah Laut, Provinsi Kalimantan Selatan","authors":"Muhammad Fedryana, Elfida Moralista, N. F. Isniarno","doi":"10.29313/bcsme.v2i2.3528","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.3528","url":null,"abstract":"Abstract. Conveyors made of steel with a mixture of carbon are prone to corrosion which can cause damage so that it will reduce the remaining service life of the conveyor structure. Therefore, corrosion control is carried out using the coating method to prevent corrosion from occurring, so as to get the service life of the conveyor structure according to the expected specifications.The research was conducted on a 90 meter long conveyor structure divided into 3 segments which were installed in 2014 and inspected in 2019, having a service life specification of 5 years and a design life of 15 years. This study aims to determine the type of corrosion that occurs, to control corrosion, to determine the corrosion rate and the remaining service life of the conveyor structure. The research method used is the measurement of thickness reduction on the conveyor structure using the Thickness Gauge TT 130, supported by supporting data in the form of environmental data for the period 2017 - 2021 in the form of rainfall data with an average of 252,7 mm/year, air temperature with an average of 28,050C and relative humidity with an average of 83,10%. The type of corrosion that occurs in the conveyor structure is uniform corrosion. The corrosion rate on the conveyor structure ranges from 0.362-0.370 mm/year into the good category based on the relative corrosion resistance of steel. The remaining service life ranges from 4,880 - 11,780 years with a service life of 5 years, thus there are 14 test points (56%) that reach the design life and 11 test points (44%) that do not reach the design life of 15 years. \u0000Abstrak. Conveyor yang berbahan dasar baja dengan campuran karbon rawan mengalami korosi yang dapat menyebabkan kerusakan sehingga akan mengurangi sisa umur pakai pada struktur conveyor. Maka dari itu, dilakukan pengendalian korosi menggunakan metode coating untuk mencegah agar tidak terjadi korosi, sehingga mendapatkan usia pakai struktur conveyor sesuai spesifikasi yang diharapkan.Penelitian dilakukan pada struktur conveyor sepanjang 90 meter terbagi menjadi 3 segmen yang dipasang pada tahun 2014 dan dilakukan inspeksi pada tahun 2019, mempunyai spesifikasi umur pakai selama 5 tahun dan umur desain selama 15 tahun. Penelitian bertujuan untuk mengetahui jenis korosi yang terjadi, melakukan pengendalian korosi, mengetahui laju korosi dan sisa umur pakai pada struktur conveyor. Metode penelitian yang digunakan yaitu pengukuran pengurangan ketebalan pada struktur conveyor menggunakan alat Thickness Gauge TT 130, dengan ditunjang menggunakan data pendukung berupa data lingkungan selama periode tahun 2017 - 2021 berupa data curah hujan dengan rata-rata 252,7 mm/tahun, temperatur udara dengan rata-rata 28,050C dan kelembapan relatif dengan rata-rata 83,10%. Jenis korosi yang terjadi pada struktur conveyor yaitu korosi merata. Laju korosi pada struktur conveyor berkisar antara 0,362-0,370 mm/tahun masuk kedalam kategori good berdasarkan ketahanan korosi relatif baja. S","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126917902","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":"Evaluasi Kinerja Crushing Plant Batu Andesit PT Widaka Indonesia di Kelurahan Jelekong, Kecamatan Baleendah, Kabupaten Bandung, Provinsi Jawa Barat","authors":"T. Hidayatullah, Sriyanti, Zaenal","doi":"10.29313/bcsme.v2i2.3973","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.3973","url":null,"abstract":"Abstract. This research is to determine the crushing process of andesite stone, to find out what obstacles occur before and after replacing the jaw plate and setting the tool, to get the efficiency value used for evaluating the performance of the crushing plant. The tools used are jaw crusher, secondary crusher, 2 vibrating screens and 12 conveyor belts. The results of this study are the results of the calculated resistance data obtained a value in the form of work efficiency of 75.73% with an effective time of 5.68 hours/day in condition A. In condition B, the effective time was 6.23 hours/day with an effectiveness of 83.06%. For the unit crushing plant, the effectiveness of the jaw crusher increases. Mechanical Availability increased by 3.65%, Physical Availability value increased by 2.41%, Effective of Utilization value increased by 15.75%, and Effectiveness of Utilization value increased by 13.04%. For cone crusher 1 also increased, the MA value was 13.10%, the PA value was 8.57%, the EU value was 23.79%, and the UA value was 14.02%. For cone crusher 2 there is a decrease in the MA value by 3.11% and the PA value by 3.26%, while the EU value increases by 6.62%, and the UA value increases by 10.21%. The resulting production is jaw crusher of 90,476 tons/hour in condition A while in condition B of 125.479 tons/hour, cone crusher 1 of 105.030 tons/hour, and cone crusher 2 of 100.575 tons/hour, with looses of 2,082 tons/day . The production target is 770 Tons/day, the average actual production in condition B is 384.89 tons/day and in condition B 524.52 tons/day, the production target in condition A and condition B is not achieved. \u0000Abstrak. Penelitian ini untuk mengetahui proses peremukan batu andesit, mengetahui apa saja hambatan yang terjadi sebelum dan sesudah penggantian jaw plate dan setting alat, untuk mendapatkan nilai efisiensi yang digunakan untuk evaluasi kinerja dari crushing plant. Alat yang digunakan yaitu jaw crusher, secondary crusher, vibrating screen 2 buah, dan belt conveyor sebanyak 12 buah. Hasil dari penelitian ini yaitu data hambatan yang dihitung didapatkan nilai berupa efisiensi kerja sebesar 75,73% dengan waktu efektif sebesar 5,68 jam/hari pada kondisi A. Pada kondisi B mendapat waktu efektif 6,23 jam/hari dengan efektivitas 83,06%. Untuk unit crushing plant, efektivitas jaw crusher naik. Pada Mechanical Availability naik sebesar 3,65%, nilai Phisycal Availability naik sebesar 2,41%, nilai Efective of Utilization naik sebesar 15,75%, dan nilai Efective of Utilization naik sebesar 13,04%. Untuk cone crusher 1 juga mengalami kenaikan, nilai MA sebesar 13,10%, nilai PA sebesar 8,57%, nilai EU sebesar 23,79%, dan nilai UA Sebesar 14,02%. Untuk cone crusher 2 terdapat penurunan nilai MA sebesar 3,11% dan nilai PA sebesar 3,26%, sedangkan nilai EU naik sebesar 6,62%, dan nilai UA naik sebesar 10,21%. Produksi yang dihasilkan yaitu jaw crusher sebesar 90,476 Ton/jam pada kondisi A sedangkan pada kondisi B sebesar 125,479 Ton/ja","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121374372","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 Struktur Conveyor A pada Tambang Tambang Batubara PT XYZ di Kabupaten Banjar, Provinsi Kalimantan Selatan","authors":"Fajar Arifianto, Elfida Moralista, Zaenal","doi":"10.29313/bcsme.v2i2.4246","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.4246","url":null,"abstract":"Abstract. Conveyor is one of the tools used to move excavated materials such as coal. The conveyor structure used is made of carbon steel. Conveyor structures can experience a decrease in quality due to corrosion. This study aims to determine the type of corrosion, corrosion control, and remaining service life of the conveyor structure. In this study, observations of environmental conditions include an average rainfall of 217.53 mm/year, an average air temperature of 27.22 ⁰C, and average relative humidity of 83.48%. The actual thickness measurement of the conveyor structure is carried out using the Ultrasonic Thickness GaugeTT 130 at 25 test points. The methodology used is by measuring the thickness reduction of the conveyor structure due to corrosion to determine the corrosion rate and remaining service life of the conveyor structure. The type of corrosion that occurs in the conveyor structure is uniform corrosion. The corrosion control method applied is the coating method with a 3-layer system including the primary coating using Seaguard 5000, intermediate coating using Sherglass FF, and top coating using Aliphatic Acrylic Modified Polyurethane. The corrosion rate on the conveyor structure is 0.1733 – 0.3133 mm/year. Based on the table, the relative corrosion resistance of steel is in a good category. Remaining Service Life of the conveyor structure is 7.56 – 11.86 years. There are 8 or 32% of test points that are estimated to not reach the design life of the conveyor structure (15 years). \u0000Abstrak. Conveyor merupakan salah satu alat yang digunakan untuk memindahkan material bahan galian seperti batubara. Struktur conveyor yang digunakan berbahan dasar baja karbon. Struktur conveyor dapat mengalami penurunan kualitas yang diakibatkan oleh korosi. Penelitian ini bertujuan untuk mengetahui jenis korosi, pengendalian korosi dan remaining service life struktur conveyor. Pada penelitian ini, pengamatan kondisi lingkungan meliputi curah hujan rata-rata 217,53 mm/tahun, temperatur udara rata-rata 27,22 ⁰C dan kelembapan relatif rata-rata 83,48 %. Pengukuran tebal aktual struktur conveyor dilakukan dengan menggunakan alat Ultrasonic Thickness GaugeTT 130 pada 25 test point. Metodologi yang digunakan yaitu dengan pengukuran pengurangan ketebalan struktur conveyor akibat korosi untuk menentukan corrosion rate dan remaining service life struktur conveyor. Jenis korosi yang terjadi pada struktur conveyor adalah korosi merata. Metode pengendalian korosi yang diaplikasikan yaitu metode coating dengan sistem 3 layer meliputi primer coating menggunakan Seaguard 5000, intermediate coating menggunakan Sherglass FF dan top coating menggunakan Aliphatic Acrylic Modified Polyurethane. Corrosion rate pada struktur conveyor yaitu 0,1733 – 0,3133 mm/tahun. Berdasarkan tabel ketahanan korosi relatif baja termasuk ke dalam kategori good. Remaining Service Life  struktur conveyor yaitu 7,56 – 11,86 tahun. Terdapat 8 atau 32% test point yang  diperkirakan tidak dapat men","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127097552","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":"Evaluasi dan Rekomendasi Geoteknik pada Lereng Produksi Penambangan Andesit PT Mitra Multi Sejahtera di Kecamatan Cikalong Kulon, Kabupaten Cianjur, Provinsi Jawa Barat","authors":"Nirmaya Wulandari, Iswandaru, Elfida Moralista","doi":"10.29313/bcsme.v2i2.4102","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.4102","url":null,"abstract":"Abstract. PT Mitra Multi Sejahtera is a company engaged in the mining sector with andesite commodities. The slope of the company has a steep slope and a large number of discontinuous fields that have the potential to make the slope unstable. This research was conducted to determine the potential types of landslides, actual and optimal slopes, safety factors and probability of failure, slope stability, and slope geometry recommendation. This research uses a methodology in the form of Q-Slope analysis, limit equilibrium method, and probabilistic method on 2 slope segments. Q-Slope analysis observes the physical properties of the discontinuous plane to obtain the optimal slope. Limit equilibrium and probabilistic methods were studied using inputs of physical and mechanical properties in the form of natural density, cohesion, and friction angle which were analyzed through Monte Carlo simulation to obtain the value of the safety factor and probability of failure. The slope of segment 1 has an actual slope of 80o and an optimal slope of 83o with a safety factor of 7.233. The slope of segment 2 has an actual slope of 76o and an optimal slope of 88o with a safety factor of 7.095. The probability of failure generated from the two slope segments is 0.7% in dynamic  conditions. The results of data analysis show that the slopes are in a safe and stable condition. The recommended slope geometry recommendation is to make an overall slope with a height of 40 meters and an overall slope of 57o by dividing it into 4 benches. \u0000Abstrak. PT Mitra Multi Sejahtera merupakan suatu perusahaan yang bergerak pada bidang pertambangan dengan komoditas andesit. Lereng pada perusahaan tersebut memiliki kemiringan yang curam dan bidang diskontinu dalam jumlah yang cukup banyak sehingga berpotensi membuat lereng menjadi tidak stabil. Penelitian ini dilakukan untuk mengetahui potensi jenis longsoran, kemiringan lereng aktual dan optimal, faktor keamanan dan probabilitas longsor, kestabilan lereng, serta rekomendasi geometri lereng.Penelitian ini menggunakan metodologi berupa analisis Q-Slope, metode kesetimbangan batas, dan metode probabilistik pada 2 segmen lereng. Analisis Q-Slope mengamati sifat fisik bidang diskontinu hingga mendapatkan kemiringan lereng optimal. Metode kesetimbangan batas dan probabilistik dikaji menggunakan input sifat fisik dan mekanik berupa bobot isi natural, kohesi, dan sudut gesek dalam yang dianalisis melalui simulasi monte carlo untuk mendapatkan nilai faktor keamanan dan probabilitas longsor. Lereng segmen 1 memiliki kemiringan aktual 80o dan kemiringan optimal 83o dengan nilai faktor keamanan sebesar 7,233. Lereng segmen 2 memiliki kemiringan aktual 76o dan kemiringan optimal 88o dengan nilai faktor keamanan sebesar 7,095. Probabilitas longsor yang dihasilkan dari kedua segmen lereng sebesar 0,7% dalam keadaan dinamis. Hasil analisis data menunjukkan bahwa lereng dalam kondisi yang aman dan stabil. Rekomendasi geometri lereng yang disarankan yakni","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131459890","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 Perubahan Kuantitas Udara pada Sistem Ventilasi Area Penambangan Kubang Kicau di PT Antam Tbk UBPE Pongkor, Kabupaten Bogor, Provinsi Jawa Barat","authors":"Rafid Rabbani, Sriyanti, Elfida Moralista","doi":"10.29313/bcsme.v2i2.4388","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.4388","url":null,"abstract":"Abstract. In the Kubang Kicau mining area at PT ANTAM Tbk UBPE Pongkor, Bogor District, West Java Province, there is a change in the quantity of air in the ventilation system. The change is due to a decrease in air flow from the blower fan with flexible duct. Air leakage in the area around the main fan causes air to return. Thus it is necessary to research changes in air quantity. The purpose of this study is to determine the decrease in air flow in the new condition blower fan 37 kW with a flexible duct distance of 100 m and a reconditioned blower fan 15 kW with a flexible duct distance of 30 m, as well as determine air leakage in the area around the main fan. Data processing is carried out to determine the tunnel area, air leakage area, flexible duct area, air flow reduction, and air leakage. The data required are tunnel dimensions, air leakage area dimensions, flexible duct distance, air velocity, and air flow from the blower fan specification (GIA SwedVent). The decrease in air discharge determined by the company is a maximum of 15%. The decrease in air flow in the blower fan 37 kW is 22.96% and the decrease in air flow in the blower fan 15 kW is 37.19%. Thus the two blower fans do not meet the standards set by the company. The amount of air leakage around the main fan is 1.391-10.601% so it still meets the standards set by the company. \u0000Abstrak. Pada area penambangan Kubang Kicau di PT ANTAM Tbk UBPE Pongkor, Kabupaten Bogor, Provinsi Jawa Barat, terjadi perubahan kuantitas udara pada sistem ventilasi. Perubahan tersebut karena penurunan debit udara dari blower fan dengan flexible duct. Leakage udara pada area sekitar main fan mengakibatkan udara balik. Dengan demikian perlu dilakukan penelitian perubahan kuantitas udaranya. Tujuan penelitian ini yaitu mengetahui penurunan debit udara pada blower fan 37 kW kondisi baru berjarak flexible duct 100 m dan blower fan 15 kW rekondisi berjarak flexible duct 30 m, serta mengetahui leakage udara pada area sekitar main fan. Pengolahan data dilakukan untuk menentukan luas tunnel, luas area leakage udara, luas flexible duct, penurunan debit udara, dan leakage udara. Data yang diperlukan adalah dimensi tunnel, dimensi area leakage udara, jarak flexible duct, kecepatan udara, serta debit udara dari spesifikasi blower fan (GIA SwedVent). Penurunan debit udara yang ditentukan oleh perusahaan yaitu maksimal 15%. Penurunan debit udara pada blower fan 37 kW yaitu 22,96% dan penurunan debit udara pada blower fan 15 kW yaitu 37,19%. Dengan demikian kedua blower fan tersebut tidak memenuhi standar yang ditentukan oleh perusahaan. Banyaknya leakage udara di sekitar main fan yaitu 1,391-10,601% sehingga masih memenuhi standar yang ditentukan oleh perusahaan.","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"39 1-2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133021838","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 Balik Kestabilan Lereng Penambangan Batubara di PT Banjarsari Pribumi Site Banjarsari Kecamatan Merapi Timur, Kabupaten Lahat, Provinsi Sumatera Selatan","authors":"Romario Rahmad Radani, Yuliadi, Iswandaru","doi":"10.29313/bcsme.v2i2.4082","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.4082","url":null,"abstract":"Abstract. In this geotechnical analysis study the research uses the Limit Equilibrium Method (LEM) method to analyze single slopes and overall slopes. The input of material properties used comes from classification rock mass rating and the results of geotechnical mapping in the field which can also be applied for kinematic analysis on slopes that can represent other slopes to get the type of relaxation that can occur in the research area. Geotechnical analysis to be able to redesign slope geometry at PT Banjarsari Pribumi is based on the results of physical property tests, mechanical properties of rocks obtained from laboratory testing, and conducting geotechnical data in the field to be used as evaluation materials. The results of the overall slope stability analysis resulted in a cross-section of A-A' to a cross-section of G-G' and a single slope for waste material. Using new material properties and slope design it can be said that the slope is in a stable state or FK > 1.1 (Kepmen 1827). On the B-B' slope which is assumed to represent other slope conditions, kinematic analysis and potentially wedge avalanches.The overall slope stability analysis on the optimal lowwall slope has a slope height geometry design of 100 m, overall slope 290, bench width of 6 meters, bench height of 10 meters, and bench slope of 400, and interamp slope has a bench width of 13 meters. \u0000Abstrak. Dalam kajian analisis geoteknik ini penelitian menggunakan metode kesetimbangan batas atau Limit Equilibrium Method (LEM) untuk menganalisis lereng tunggal, lereng interamp dan lereng keseluruhan. Adapun input material properties yang digunakan berasal dari pengklasifikasian massa batuan (RMR) dan hasil pemetaan geoteknik (geotechnical mapping) di lapangan yang juga dapat di aplikasikan untuk dilakukannya analisis kinematik pada lereng yang dapat mewakili lereng lainnya sehingga mendapatkan jenis kelongsoran yang dapat terjadi pada daerah penelitian. Analisis geoteknik untuk dapat meredesain geometri lereng di PT Banjarsari Pribumi ini berdasarkan hasil uji sifat fisik, sifat mekanis batuan yang diperoleh dari pengujian laboratorium dan melakukan penggambilan data geoteknik di lapangan untuk dijadikan bahan evaluasi. Hasil analisis kestabilan lereng keseluruhan menghasilkan penampang A-A’ hingga penampang G-G’ dan lereng tunggal untuk material waste. Dengan menggunakan material properties dan desain lereng yang baru dapat dikatakan bahwa lereng dalam keadaan stabil atau FK > 1,1 (Kepmen 1827). Pada lereng B-B’ yang diasumsikan dapat mewakili kondisi lereng lain dilakukannya analisis kinematik dan berpotensi adanya longsoran baji. Analisis kestabilan lereng keseluruhan pada lereng bagian lowwall yang optimal secara teoritis memiliki desain geometri tinggi lereng 100 m, overall slope 290, lebar bench 6 meter, tinggi bench 10 meter dan kemiringan bench 400, serta lereng interamp memiliki lebar bench 13 meter.","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133492159","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":"Evaluasi Kinerja Crushing Plant Menggunakan Metode OEE dan Hubungannya dengan Production Rate Index (PRI) di PT Gunung Lagadar Abadi, Kecamatan Margaasih, Kabupaten Bandung, Provinsi Jawa Barat","authors":"Firman Firdaus Has, Solihin, Rully Nurhasan Ramadani","doi":"10.29313/bcsme.v2i2.3594","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.3594","url":null,"abstract":"Abstract. PT Gunung Lagadar Abadi has a problem with tools that are less effective in achieving production, in order to be able to streamline the performance of these tools, it is necessary to do an assessment of the problems, one of which is in the mining processing area where in a crushing plant unit there is a crusher consisting of 3 jaw primary crusher, secondary jaw crusher and tertiary cone crusher parts. The tool has continuity in a work system. At the primary crusher stage, the results obtained are Mechanical Availability (MA) 96.64%, Physical Availability (PA) 96.78%, Use of Availability (UA) 95.69%, Effective of Utilization (EU) 92.61%, and Production rate index (PRI) 35.10%. Furthermore, in the secondary crusher stage, the results obtained are Mechanical Availability (MA) 97.64%, Physical Availability (PA) 97.75%, Use of Availability (UA) 95.15%, Effective of Utilization (EU) 93.01%, and Production rate index (PRI) 93.56%. In the last stage of tertiary crushing, the results obtained are Mechanical Availability (MA) 98.64%, Physical Availability (PA) 98.66%, Use of Availability (UA) 98.55%, Effective of Utilization (EU) 97.23% and Production rate index (PRI) 33.35%, and the resulting OEE 49.29%. Based on the calculation results of the overall equipment effectiveness (OEE) value, which is 49.29%, it can be diagnosed that the overall equipment working on the crushing plant unit is not effective because it is far from an acceptable benchmark value of 85%, there are three components (availability, performance, rate of quality product) which is the biggest problem, one of which is the rate of quality product which is less than 85% so that the resulting production rate index (PRI) is small because the mechanical equipment to produce production does not work in accordance with its capacity, which at least works up to 85%, meanwhile the availability parameter is not a problem because the resulting value is more than 95% as well as the performance parameter. \u0000Abstrak. PT Gunung Lagadar Abadi memiliki permasalahan alat yang kurang efektif dalam mencapai produksi, guna untuk dapat mengefektifkan kinerja alat tersebut, perlu dilakukannya pengkajian terhadap permasalahan – permasalahan yang salah satunya berada pada area pengolahan tambang dimana pada suatu unit crushing plant terdapat alat peremuk yang terdiri dari 3 bagian jaw primary crusher, jaw secondary crusher dan tertiary cone crusher. Alat tersebut memiliki kesinambungan dalam suatu sistem kerja. Pada tahap primary crusher diperoleh hasil Mechanical Availability (MA) 96,64%, Phyisical Availability (PA) 96,78%, Use of Availability (UA) 95,69%, Effective of Utilization (EU) 92,61%, dan Production rate index (PRI) 35,10%. Selanjutnya pada tahap secoundary crusher diperolah hasil Mechanical Availability(MA) 97,64%, Phyisical Availability (PA) 97,75%, Use of Availability (UA) 95,15%, Effective of Utilization (EU) 93,01%, dan Production rate index (PRI) 93,56%. Pada tahap terakhir tertiary crushi","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124766300","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 Struktur Conveyor B pada Tambang Batubara PT XYZ di Kabupaten Kotabaru, Provinsi Kalimantan Selatan","authors":"Rizky Ade Pradana, Elfida Moralista, Zaenal","doi":"10.29313/bcsme.v2i2.3567","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.3567","url":null,"abstract":"Abstract. Conveyor structure is a means of transportation used in the coal mining industry to assist the transfer of minerals. The conveyor structure is made of carbon steel which is subject to corrosion. Corrosion will cause the conveyor structure to decrease in thickness. Therefore, it is necessary to control and monitor corrosion on the conveyor structure. The purpose of this study is to determine the type of corrosion, the corrosion control applied to the conveyor structure. The methodology used in this study is the thickness of the conveyor structure. Measurements were made using the Ultrasonic Thickness Gauge TT 130 on a 90 meter long conveyor structure with 3 segments and 25 test points. Environmental conditions in the 2015-2019 period have an average rainfall of 197.98 mm/year, an average air temperature of 26.91oC and an air humidity of 83.62%. The type of corrosion that occurs in the conveyor structure is uniform corrosion. In the identification of corrosion, the use of a 3-layer coating method, namely the primer coating using Seaguard 5000, Intermediate coating Sherglass FF, and Top coating using aliphatic acrylic modified polyurethane. \u0000Abstrak. Struktur conveyor adalah alat angkut yang digunakan pada industri pertambangan batubara untuk menunjang pemindahan material bahan galian. Struktur conveyor terbuat dari baja karbon yang dapat mengalami korosi. Korosi akan menyebabkan struktur conveyor mengalami pengurangan ketebalan. Oleh karena itu, maka diperlukana pengendalian dan monitoring korosi pada struktur conveyor. Tujuan dilakukannya penelitian ini yaitu mengetahui jenis korosi, metode pengendalian korosi yang diaplikasikan pada stuktur conveyor. Metodologi yang digunakan dalam penelitian ini yaitu  pengukuran ketebalan struktur conveyor. Pengukuran dilakukan menggunakan alat Ultrasonic Thickness Gauge TT 130 pada struktur conveyor sepanjang 90 meter dengan 3 segmen dan 25 test point. Kondisi lingkungan dalam rentang waktu 2015-2019 memiliki curah hujan rata-rata 197,98 mm/tahun, temperature udara rata-rata 26,91oC dan kelembapan udara 83,62%. Jenis korosi ytang terjadi pada struktur conveyor yaitu korosi merata. Dalam pengenalian korosi digunakan metode coating 3 lapis yaitu primer coating menggunakan Seaguard 5000, Intermediate coating Sherglass FF, dan Top coating menggunakan aliphatic acrylic modified polyurethane.","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130051288","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 Geometri Jalan Tambang untuk Meningkatkan Produksi Penambangan Andesit PT Gunung Kulalet Kecamatan Baleendah, Kabupaten Bandung, Provinsi Jawa Barat","authors":"Rijal Aditya Prasetya, Zaenal, N. F. Isniarno","doi":"10.29313/bcsme.v2i2.3644","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.3644","url":null,"abstract":"Abstract. This mining road evaluation activity is carried out with the aim of knowing the condition of the road geometry used as well as efforts to improve road geometry and production before repairing and after repairing the mining road including straight road width, bend road width, road slope, bend radius, superelevation, transverse slope, and the actual rimpull. This research was conducted using primary and secondary data collection methods, data processing techniques and data analysis techniques, which were compared with the standards in Decree No. 1827/K/30/MEM/2018 and AASHTO in an effort to increase mining production. Based on the results of the research, the actual width of the straight road is between 3,95 – 12,90 meters and the width of the bend road is 5,13 – 9,77 meters. For the road slope, the grade varies from 1,596% - 37,35% with a maximum standard grade of 12% so that there are 4 road segments that are repaired. The actual superelevation condition starts from 13,55% - 38,56% based on the calculation of the minimum superelevation is 6% so that repair simulations are carried out on each superelevation segment. Based on the results of calculations regarding production before repair of loading equipment of 81,61 BCM/hour and transportation equipment of 81,58 BCM/hour, with the company's production target of 100 BCM/hour. After simulating the improvement of road geometry, the production after repair of loading equipment was 105,91 BCM/hour and transportation equipment of 105,74 BCM/hour. The increase in production occurs because the circulation time of the conveyance is getting faster, where before the repair the cycle time is 13.03 minutes, while after the simulation the repair is 8.01 minutes. \u0000Abstrak. Kajian jalan tambang ini dilakukan dengan tujuan mengetahui produksi sebelum perbaikan geometri jalan tambang. Kemudian mengetahui upaya perbaikan geometri jalan tambang berdasarkan kesesuaian pada Kepmen No. 1827/K/30/MEM/2018 dan AASHTO dalam upaya mencapai target produksi. Tujuan selanjutnya mengetahui produksi dari alat muat dan alat angkut yang didapatkan setelah perbaikan geometri jalan tambang. Adapun geometri jalan tambang meliputi lebar jalan lurus, lebar jalan tikungan, kemiringan jalan, jari-jari tikungan, superelevasi, kemiringan melintang. Berdasarkan hasil penelitian kondisi lebar jalan lurus aktual berkisar antara 3,95 – 12,90 meter dan lebar jalan tikungan sebesar 5,13 – 9,77 meter. Kemiringan jalan memiliki grade bervariasi dimulai dari 1,596% - 37,35% dengan standar grade maksimal sebesar 12%. Kondisi superelevasi aktual dimulai dari 13,55% - 38,56% berdasarkan perhitungan superelevasi minimum adalah 6%, sehingga dilakukan simulasi perbaikan pada setiap segmen superelevasi. Berdasarkan hasil perhitungan mengenai produksi sebelum perbaikan alat muat sebesar 81,61 BCM/jam dan alat angkut sebesar 81,58 BCM/jam, dengan target produksi perusahaan sebesar 100 BCM/jam. Setelah dilakukan simulasi perbaikan geometri jalan di","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"434 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115462670","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 dan Ekonomis dalam Merencanakan Penggantian Alat Gali-Muat dan Angkut pada Penambangan Nikel Laterit PT Tonia Mitra Sejahtera Kecamatan Kabaena Tengah Kabupaten Bombana Provinsi Sulawesi Tenggara","authors":"A. S. Dwi Wahyullah, Zaenal, N. F. Isniarno","doi":"10.29313/bcsme.v2i2.3645","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.3645","url":null,"abstract":"Abstract. The condition of mechanical which has almost reached the service life of the tool requent breakdowns, resulting in decreased machine performance and higher operating costs, of course, affects productivity and production which will decrease. Therefore it is necessary to replace the tool. In planning the replacement of mechanical equipment, it is necessary to conduct a technical and economical study. The technical study includes a study of equipment production, and an economic study includes operating costs, ownership costs, Present Worth Cost and Production Unit Cost values. The research method is taking primary data and also secondary data. Based on the results of technical and economic studies, the old excavating equipment with a production of 382.008.01 BCM/year and the new excavating equipment with a production of 443.071,00 BCM/year. While the old transporting production with production of 381,763.01 BCM/year and new transporting production of 441,953. 28 BCM/year. The cost of calculating the cost of Production Unit Cost for old excavating equipment is Rp. 4,657.94 BCM and New digging-loading equipment of Rp. 3.725,53 BCM. For the old transporting of the cost of Production Unit Cost Rp.2. 720.38 BCM and new transporting of Rp. 2.162,62 BCM. Based on technical and economic studies for excavating and transporting equipment needs to be replaced because the productivity of new tools is greater and operating costs are more efficient than old tools, from the results of Unit Cost Production for excavating and transporting new tools is more efficient than old tools, as well as long-term investment if buying new tools. \u0000Abstrak. Kondisi dari alat mekanis yang hampir mencapai batas umur pemakaian dan sering terjadi kerusakan, sehingga mengalami penurunan kinerja mesin dan biaya operasi alat semakin besar, tentunya mempengaruhi produktivitas dan produksi yang akan semakin menurun. Oleh karena itu maka perlu dilakukan penggantian alat. Dalam merencanakan penggantian alat mekanis maka perlu dilakukan kajian secara teknis dan ekonomis. Untuk kajian teknis meliputi kajian produksi alat, dan kajian ekonomis meliputi biaya operasi, biaya kepemilikan, nilai Present Worth Cost dan nilai Production Unit Cost. Metode penelitian dilakukannya pengambilan data primer dan data sekunder. Berdasarkan hasil kajian tekniks dan ekonomis, alat gali-muat lama dengan produksi sebesar 382.001,00 BCM/tahun dan alat gali-muat baru dengan produksi sebesar 443.071,25 BCM/tahun. Sedangkan alat angkut lama produksi dengan produksi sebesar 381.763,02 BCM/tahun dan alat angkut baru produksi sebesar 441.953,28 BCM/tahun. Biaya perhitungan biaya Production Unit Cost untuk alat gali-muat lama sebesar Rp. 4.657,94 BCM dan alat gali-muat baru yaitu sebesar Rp. 3.725,53 BCM. Untuk alat angkut lama biaya Production Unit Cost Rp.2.720,38 BCM dan alat angkut baru sebesar Rp.2.162,62 BCM. Berdasarkan kajian teknis dan ekonomis untuk alat gali-muat dan alat angkut perlu diganti karena","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116172788","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}