Bandung Conference Series: Mining Engineering最新文献

{"title":"Pengaruh Geometri Jalan Terhadap Konsumsi Bahan Bakar pada Penambangan Batubara PT Bima Nusa Internasional Site PT Kideco Jaya Agung di Kecamatan Muara Komam, Kabupaten Paser, Provinsi Kalimantan Timur","authors":"Bagas Ghozi Adiwiyuga, Dudi Nasrudin Usman, Zaenal","doi":"10.29313/bcsme.v3i1.6773","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.6773","url":null,"abstract":"Abstract. PT Bima Nusa Internasional is a contractor company engaged in the coal mining business which is located at the PT Kideco Jaya Agung site. Mining activities are carried out with an open pit mining system using a strip mining type. The use of diesel as a fuel has a significant effect on mining operational costs. There are several factors that can affect the use of fuel in mechanical devices, one of which is the road geometry. Therefore this research was conducted to increase the productivity of the dig-load and transport equipment with more efficient fuel consumption. Based on actual conditions in the field, there are still several road segments whose grade are not in accordance with the AASHTO standard is above 12%, so that the rimpull that must be overcome by the mechanical device is getting bigger, with the use of greater rimpull will make fuel consumption even greater which will have an impact on mining operational costs, so the company must evaluate the use of fuel in each work unit to reduce operational costs. Based on the results of observations and calculations in field observations, the actual production of conveyances equipment is 220,33 BCM/hour with an average fuel consumption conveyances equipment 14,82 liters/hour. The actual value of the fuel ratio in research activities for conveyances equipment means is 0,27 liters/BCM, and the fuel cost is Rp. 51.766.012 /month/tool. After conducting a study on road geometry, the production value increased to 257,64 BCM/hour/tool with a fuel ratio of 0,23 liter/BCM, and fuel cost to Rp. 44.273.822 /month/tool, so that after repairs decreased costs of Rp. 7.492.190 /month/tool. Improvements in road conditions greatly affect equipment production, fuel consumption, fuel ratio, and fuel cost so as to reduce operational costs in mining. \u0000Abstrak. PT Bima Nusa Internasional merupakan perusahaan kontraktor bergerak di bidang usaha pertambangan batubara yang berlokasi di site PT Kideco Jaya Agung. Penambangan dilakukan dengan Sistem Tambang Terbuka menggunakan jenis Strip Mining. Penggunaan solar sebagai bahan bakar memberikan pengaruh biaya operasional penambangan yang cukup besar. Terdapat beberapa faktor yang dapat mempengaruhi penggunaan bahan bakar pada alat mekanis, diantaranya kondisi geometri jalan.  Oleh sebab itu penelitian ini dilakukan untuk meningkatkan produktivitas alat gali-muat dan angkut dengan penggunaan bahan bakar yang lebih efisien. Berdasarkan keadaan aktual di lapangan masih terdapat beberapa segmen jalan yang kemiringannya tidak sesuai dengan standar AASHTO yaitu di atas 12%, sehingga Rimpull yang harus diatasi oleh alat mekanis tersebut semakin besar, dengan penggunaan rimpull yang besar akan membuat konsumsi bahan bakar menjadi semakin besar yang akan berdampak pada biaya operasional penambangan, sehingga perusahaan harus mengevaluasi penggunaan bahan bakar di setiap unit kerja untuk menekan biaya operasional. Berdasarkan hasil pengamatan dan perhitungan pada kegiatan ","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"1 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":"131095763","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 G pada Tambang Batubara PT GHI di Kabupaten Tanah Laut, Provinsi Kalimantan Selatan","authors":"Nurul Azizah, Elfida Moralista, Zaenal","doi":"10.29313/bcsme.v3i1.5490","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5490","url":null,"abstract":"Abstract. The transfer of coal material at PT GHI in Tanah Laut Regency, South Kalimantan Province usually uses conveyors. This conveyor is one of the mechanical devices used to move material from one place to another. This conveyor structure has a carbon steel base material which is a material that is prone to corrosion. This corrosion is caused by a reaction with the surrounding environment and the presence of impurities in coal. For this reason, it is necessary to monitor and control corrosion. This study aims to determine the type of corrosion that occurs, corrosion control methods, and the corrosion rate and remaining service life of the conveyor structure.The research was conducted on a 94 meter long conveyor structure which was divided into 3 segments consisting of 25 test points. The methodology in this research is thickness reduction measurement. Measurements were made on the conveyor structure using the Smart Sensor Ultrasonic Thickness Gauge TT 130. Data on nominal thickness, actual thickness and service life are used to calculate the corrosion rate and remaining service life of the conveyor structure. Environmental conditions in the research area based on data from 2015 - 2019 have an average rainfall of 229.26 mm / year, an average relative humidity of 79.44% and an average temperature of 28.16ºC.The type of corrosion that occurs on the conveyor structure is uniform corrosion. The corrosion control method used is the Three Layers System Coating method with primary coating using Seaguard 5000, intermediate coating using Sherglass FF, and top coating using Aliphatic Acrylic Modified Polyurethane \u0000Abstrak. Pemindahan material batubara di PT GHI di Kabupaten Tanah Laut, Provinsi Kalimantan Selatan ini biasanya menggunakan Conveyor. Conveyor ini merupakan salah satu alat mekanis yang digunakan untuk memindahkan material dari satu tempat ke tempat lainnya. Struktur Conveyor ini memiliki bahan dasar baja karbon yang mana material ini merupakan material yang rawan terhadap korosi. Korosi ini disebabkan adanya reaksi dengan lingkungan sekitar dan adanya pengotor pada batubara. Untuk itu perlu dilakukan monitoring dan pengendalian korosi. Penelitian ini bertujuan untuk mengetahui jenis korosi yang terjadi, metode pengendalian korosi, dan laju korosi dan sisa umur pakai struktur conveyor. Penelitian dilakukan pada struktur Conveyor sepanjang 94 meter yang terbagi menjadi 3 segmen yang terdiri dari 25 test point. Metodologi dalam penelitian ini adalah pengukuran pengurangan ketebalan. Pengukuran dilakukan pada struktur conveyor menggunakan alat Smart Sensor Ultrasonic Thickness Gauge TT 130. Data tebal nominal, tebal aktual dan umur pakai yang digunakan untuk menghitung corrosion rate serta remaining service Life dari struktur conveyor. Kondisi lingkungan di daerah penelitian berdasarkan data dari tahun 2015 – 2019 memiliki curah hujan rata-rata 229,26 mm/tahun, kelembapan relatif rata-rata 79,44% dan temperatur rata-rata 28,16ºC. Jenis korosi y","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"26 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":"133095780","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 PT XYZ di Kabupaten Tebo, Provinsi Jambi","authors":"Jossie Indra Saputra, Elfida Moralista, Iswandaru","doi":"10.29313/bcsme.v3i1.5965","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5965","url":null,"abstract":"Abstract. Carbon steel is the widely used steel as a material for conveyor structures. conveyor structure interacts with the environment can cause corrosion Therefore, monitoring is needed, one of which is by conducting a study on corrosion on the conveyor structure so that the remaining service life of the structure can reach its design life. This study aims to determine the type of corrosion, the applied corrosion control method, the corrosion rate, and the remaining service life of the conveyor structure. The methodology in this research is the method of measuring the thickness reduction of the conveyor structure at 32 observation points along 142 meters above the ground. In this study, observations of environmental conditions included air temperatures ranging from 25.8oC – 26.64oC with an average humidity of 88.5% and rainfall ranging from 42.19 – 437.7 mm.The type of corrosion that occurs in the conveyor structure is uniform corrosion. The corrosion control method applied is the coating method with using Seaguard 5000 for primary coating, Sherglass FF for intermediate coating, Aliphatic acrylic modified polyurethane for top coating. \u0000Abstrak. Baja karbon merupakan baja yang banyak digunakan sebagai bahan pembuatan struktur conveyor. struktur conveyor yang berinteraksi dengan lingkungan dapat mengakibatkan terjadinya korosi Oleh karenanya, diperlukan monitoring salah satunya dengan melakukan kajian mengenai korosi pada stuktur conveyor agar sisa umur pakai struktur dapat mencapai umur desainnya. Penelitian ini bertujuan untuk mengetahui jenis korosi, metode pengendalian korosi yang diaplikasikan, laju korosi, dan sisa umur pakai struktur conveyor. Metodologi dalam penelitian ini yaitu metode pengukuran pengurangan ketebalan struktur conveyor pada 32 titik pengamatan sepanjang 142. Pada penelitian ini, pengamatan kondisi lingkungan meliputi temperatur udara berkisar 25.8oC – 26.64 oC dengan kelembaban rata-rata 88,5% dan curah hujan berkisar 42.19 – 437.7 mm. Jenis korosi yang terjadi pada struktur conveyor adalah korosi merata. Metode pengendalian korosi yang diaplikasikan adalah metode coating dengan menggunakan Seaguard 5000 untuk primer coating, Sherglass FF untuk intermediate coating, Aliphatic acrylic modified polyurethane untuk top coating.","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"33 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":"117189758","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":"Pemodelan Geologi Pasir Besi Menggunakan Metode Penampang Berdasarkan Data Seismik Refleksi di Daerah Kecamatan Loloda Utara, Kabupaten Halmahera Utara Provinsi Maluku Utara","authors":"Jivan Akbar, N. F. Isniarno, Dudi Nasrudin Usman","doi":"10.29313/bcsme.v3i1.6149","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.6149","url":null,"abstract":"Abstract. The geological conditions in the area of North Loloda District, North Halmahera Regency, North Maluku Province, one of which is composed of gravel, gravel, sand, and mud rock units which are placer deposits from the Alluvium Formation (Qa) which are indicated to contain iron sand deposits. These deposits are formed due to the weathering process of andesitic to basaltic igneous rocks which experience erosion and are transported to rivers and then continue to be carried to the sea. From this distribution, a geological model of the iron sand layer can be described by carrying out the exploration stage first. iron of which the amount and shape of the geological model are known. To identify iron sand deposits, 2 methods of exploration were carried out, namely direct exploration by drilling to describe the depth of the layer and indirect exploration using a geophysical method based on wave propagation, namely reflection seismic which gets output in the form of seismic wave cross-sections, from seismic cross-sectional data it is interpreted based on drilling data with changes from seismic propagation to the subsurface layers. Geological modeling is obtained from the interpretation of seismic data with correlations from drilling data, the number of interpretations obtained is 315 points from the results of crossings between 2 different seismic paths, the modeling is carried out using the cross-sectional method which obtains the amount of iron sand as much as 245.009.121 Bcm in the second layer. 3, sample testing was also carried out using the magnetic separator method and obtained the value of the magnetic content, namely point 1 93.3% and point 2 94.1%, if the whole iron sand was multiplied by the percentage of magnetism to get the amount of 229.573.546,3 Bcm. \u0000Abstrak. Kondisi geologi pada daerah Kecamatan Loloda Utara, Kabupaten Halmahera Utara, Provinsi Maluku Utara salah satunya tersusun dari satuan batuan Kerakal, kerikil, pasir, dan lumpur yang merupakan endapan  placer dari Formasi Aluvium (Qa) yang di indikasi terdapat adanya endapan pasir besi. Endapan tersebut terbentuk karena proses pelapukan batuan beku andesitik hingga basaltik yang mengalami erosi dan tertransportasi ke sungai lalu terus terbawa ke laut, dari penyebaran tersebut dapat digambarkan model geologi dari lapisan pasir besi dengan melakukan tahap ekslorasi terlebih dahulu, Penelitian ini dilakukan untuk mengetahui penyebaran material pasir besi yang diketahui jumlah dan bentuk model geologinya. Untuk mengindentifikasi endapan pasir besi dilakukan 2 metode eksplorasi yaitu ekplorasi langsung dengan melakukan pengeboran untuk menggambarkan kedalam lapisan dan ekplorasi tidak langsung menggunakan metode geofisika berdarsarkan rambatan gelombang yaitu seismik refleksi yang mendapatkan output berupa penampang gelombang seismik, dari data penampang seismik di interpretasi berdasarkan data pengeboran dengan perubahan dari rambatan seismik terhadap lapisan dibawah permukaan. Pe","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"5 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":"121290418","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 Angkut pada Pengupasan Overburden Penambangan Batubara PT Citra Mitra Sehati Site Job PT Cakra Bumi Pertiwi di Kecamatan Ulok Kupai, Kabupaten Bengkulu Utara, Provinsi Bengkulu","authors":"Fattah Aulia Rachman, Zaenal, Iswandaru","doi":"10.29313/bcsme.v3i1.6778","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.6778","url":null,"abstract":"Abstract. PT Citra Mitra Sehati is one of the companies engaged in mining using the Open Mining. The location of this company is in Ulok Kupai District, Notrh Bengkulu Regency, Bengkulu Province. Mining activities use 1 Dossan Dx 500 Excavator and 10 Dumptruck Tranporting Hino 700. The age of this mechanical tool has almost reached its service life and frequent breakdowns occur, resulting in decreased tool performance and greater operating costs. This of course affects the productivity and production which is decreasing. Therefore, it is necessary to plan to replace the tool or not. The purpose of this study is to determine the comparison of the production of old equipment and new equipment, and the economic comparison includes operating costs, ownership costs, Present Worth Cost and Production Unit Cost values. The research method is taking primary data and also secondary data. The primary data in this research are working time, excavator bucket material volume, circulation time, resistance 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 the primary and secondary data, the results of the production value, operating costs, ownership costs, Present Worth Cost, and Production Unit Costs for old and new tools are obtained. Based on the results of technical and economic studies, the old transporting production with production of 761.776,63 BCM/year and new transporting production of 990.964,80 BCM/year. Based on the results of an economic study, the Present Worth Cost of the old equipment was IDR 9,132,362,361.05 and the new equipment was IDR 18,478,081,688.32. The cost of calculating the old transporting of the cost of Production Unit Cost IDR 2.997,06 /BCM and new transporting of                        IDR 2.071,84 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. PT Citra Mitra Sehati merupakan salah satu perusahaan yang bergerak di bidang pertambangan dengan menggunakan Sistem Tambang Terbuka. Lokasi perusahaan ini terletak di Kecamatan Ulok Kupai, Kabupaten Bengkulu Utara, Provinsi Bengkulu. Kegiatan penambangan mengunakan 1 alat gali-muat Excavator Dossan Dx 500 dan 10 alat angkut Dump Truck Hino 700. Umur alat mekanis ini hampir mencapai umur pemakaian dan sering terjadi kerusakan, sehingga mengalami penurunan kinerja alat dan biaya operasinya semakin besar. Hal ini tentunya mempengaruhi produktivitas dan produksinya yang semakin menurun. Oleh karena itu perlu merencanakan penggan","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"54 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":"133481823","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 Terhadap Produksi Pengangkutan Batu Andesit pada PT Silva Andia Utama di Kecamatan Batujajar, Kabupaten Bandung Barat, Provinsi Jawa Barat","authors":"Rama Aditya, Zaenal, Noor Fauzi Isniarno","doi":"10.29313/bcsme.v3i1.5598","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5598","url":null,"abstract":"Abstract. PT Silva Andia Utama is an andesite mining company located in Giriasih Village, Batujajar District, West Bandung Regency, West Java Province. The failure to achieve the production target of 15,292.8 BCM/month is a problem for this company, where one of the factors is the non-standard road geometry, such as narrow road widths which result in the means of conveyance not working optimally, thus affecting the cycle time of the equipment. From these problems, it is necessary to improve the geometry of the mine road to maximize the speed of the conveyance, so that the conveyance cycle time decreases and production increases. This study discusses the influence of mining road geometry on increasing productivity based on AASHTO (American Association of State Highway and Transportation Officials) and Ministerial Decree No. 1827/K/30/MEM/2018, which concerns road geometry including straight road width, bend condition road width, grade, bend radius, cross slope, superelevation, and actual Rimpull calculations . In this mine road geometry study, it is then linked to the production of digging-loading and hauling equipment to increase mining production of andesite. The results of this study obtain production in actual conditions of 13.534,5 BCM/month. The actual calculation results for this production have not reached the production target, so one of the factors in increasing production is the need to improve the geometry of mine roads that do not meet AASHTO (American Association of State Highway and Transportation Officials) standards and Ministerial Decree No.1827/K/30/MEM/2018. In the actual mining road geometry conditions, the average straight road width is 8.25 meters and for the bend condition road width is an average of 7.27 meters. On the slope of the road (grade) obtained a value of 0% - 21.22% in theoritical conditions. After repairing the geometry of mine road the production value of the conveyance of 16,929,12  BCM/month. With this value, production will increase, so that the production target desired by the company is achieved. \u0000Keywords: AASHTO, Cycle Time, Road Geometry, Production. \u0000Abstrak. PT Silva Andia Utama merupakan salah satu perusahaan penambangan batu andesit yang terletak di Desa Giriasih, Kecamatan Batujajar, Kabupaten Bandung Barat, Provinsi Jawa Barat. Tidak tercapainya target produksi sebesar 15.292,8 BCM/bulan menjadi permasalahan di perusahaan ini, dimana salah satu faktornya adalah geometri jalan yang tidak sesuai standar, seperti lebar jalan yang sempit mengakibatkan alat angkut tidak bekerja secara optimal, sehingga berpengaruh terhadap waktu edar alat tersebut. Dari permasalahan tersebut, maka perlu dilakukannya perbaikan geometri jalan tambang untuk memaksimalkan kecepatan pada alat angkut, sehingga waktu edar alat angkut turun dan produksi meningkat. Penelitian ini membahas mengenai pengaruh geometri jalan tambang terhadap peningkatan produktivitas berdasarkan AASHTO  (American Association of State Highway and Tr","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"164 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":"127313082","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 F pada Tambang Batubara PT XYZ di Kabupaten Sarolangun Provinsi Jambi","authors":"La Ode Arlin, Elfida Moralista, Noor Fauzi Isniarno","doi":"10.29313/bcsme.v3i1.6849","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.6849","url":null,"abstract":"Abstract. A conveyor is a type of conveyance used to transport mineral materials such as coal. The conveyor's structure is made of carbon steel. However, the conveyor's quality may suffer from corrosion caused by direct contact with coal impurities and their environment. The average air temperature was 27.830C, the average rainfall was 235.34 mm, and the relative humidity was 88.48%. The purpose of this study is to determine the type of corrosion, corrosion control conditions, specifically the coating used, corrosion rate, and the conveyor's remaining service life. Methodology in this research is measuring the thickness reduction of conveyor structure to determine corrosion rate and remaining service life. This research was conducted on a conveyor structure consisting of 4 segments with 32 test points along 142 meters. The actual thickness measurement of the conveyor structure is carried out using Ultrasonic Thickness Gauge TT 130. Type of corrosion that occurs in the conveyor structure is uniform corrosion. Corrosion control method applied to the conveyor structure is coating method. Coating used is a primer coating using Seaguard 5000, intermediate coating using Sherglass FF and top coating using Aliphatic Acrylic Modified Polyurethane. Corrosion rate on conveyor structure is 0.1857 – 0.3357 mm/year and is included in good category based on the relative corrosion resistance of steel. Remaining service life of conveyor structure is 6.580 – 9.138 years and based on the design life, which is 15 years, there are 12 test points or 37.5% test points which are predicted to not reach the design life of conveyor structure. \u0000Abstrak. Conveyor merupakan salah satu alat angkut yang digunakan untuk memindahkan material bahan galian seperti batubara. Struktur conveyor yang digunakan berbahan dasar baja karbon. Namun demikian struktur conveyor dapat mengalami penurunan kualitas yang diakibatkan oleh korosi yang terjadi karena kontak langsung dengan pengotor batubara dan lingkungannya. pengamatan kondisi lingkungan meliputi temperatur udara rata-rata 27,830C, curah hujan rata-rata 235,34 mm dan kelembapan relatif 88,48%. Penelitian ini bertujuan untuk mengetahui jenis korosi, kondisi pengendalian korosi yaitu coating yang diaplikasikan, laju korosi, dan sisa umur pakai struktur conveyor. Metodologi dalam penelitian ini adalah pengukuran pengurangan ketebalan struktur conveyor untuk mengetahui laju korosi dan sisa umur pakai. Penelitian ini dilakukan pada struktur conveyor yang terdiri dari 4 segmen dengan 32 test point sepanjang 142 meter. Pengukuran tebal aktual struktur conveyor dilakukan dengan menggunakan alat Ultrasonic Thickness Gauge TT 130. Jenis korosi yang terjadi pada struktur conveyor yaitu korosi merata. Metode pengendalian korosi yang diaplikasikan pada struktur conveyor yaitu metode coating three layer. Coating yang digunakan adalah primer coating menggunakan Seaguard 5000, intermediate coating menggunakan Sherglass FF dan top coating menggunaka","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"10 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":"126579087","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 Bentonit PT SMU di Desa Nangerang, Kecamatan Jampang Tengah, Kabupaten Sukabumi Provinsi Jawa Barat","authors":"Alifia Atsiila Fitri, Zaenal, Noor Fauzi Isniarno","doi":"10.29313/bcsme.v3i1.5984","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5984","url":null,"abstract":"Abstract. PT SMU is a company that will plan bentonit mining in Nangerang Village, Jampang Tengah District, Sukabumi Regency, West Java Province which needs to be done investment analysis and economic feasibility of mine to see bentonit reserve prospect in that. To consider this, an economics analysis is required based on the concept of discounted cash flow analysis and sensitivity analysis. The parameters used to determine economic viability in bullion bentonit production of PT SMU are Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PBP) and sensitivity to NPV value due to changes in selling price and production cost. Based on analysis result of DCFROR analysis, Net Present Value value is Rp 20.386.301.635, Internal Rate of Return is 22,92 %, with Payback Period is 2,92 year, then this project is feasible to run. Then a sensitivity analysis is conducted to evaluate the impact of investment uncertainty by determining the level of profitability that will vary due to changes in sensitivity parameters. The parameters of investment that become the sensitivity parameter in this research are production cost and selling price. Assessment of sensitivity to NPV value due to changes in selling price and production cost at PT SMU assuming escalation of revenues and cost escalation by 3%. Net Present Value generated can show how sensitive the value obtained from the parameters of selling price. When the selling price drops above 12% and the production cost rises above more than 48%, then the project will be a loss. \u0000Keywords: Net Present Value (NPV), Internal Rate of Return (IRR) and Payback Period (PBP), Discounted Cash Flow (DCF), Sensitivity Analysis. \u0000  \u0000Abstrak. PT SMU merupakan perusahaan yang melakukan penambangan bentonit di Desa Nangerang, Kecamatan Jampang Tengah, Kabupaten Sukabumi, Provinsi Jawa Barat. Sehingga perlu untuk dilakukan analisis investasi dan kelayakan ekonomi tambang untuk melihat prospek cadangan bentonit di lokasi tersebut. Untuk mempertimbangkan hal tersebut, maka diperlukannya analisis keekonomian berdasarkan konsep aliran kas diskonto (Discounted Cash Flow Rate of Return Analysis) dan analisis sensitivitas. Parameter yang digunakan untuk menentukan kelayakan ekonomi PT SMU adalah Net Present Value (NPV), Internal Rate of Return (IRR), Payback Periode (PBP) dan sensitivitas terhadap nilai NPV akibat perubahan harga jual dan biaya produksi. Berdasarkan hasil pengkajian analisis DCFROR didapat nilai Net Present Value yaitu Rp 20.386.301.635, Internal Rate of Return yaitu 22,92 %, dengan Payback Periode yaitu 2,92 tahun, maka proyek ini layak untuk dijalankan. Selanjutnya dilakukan Analisis sensitivitas untuk mengevaluasi dampak dari ketidakpastian investasi dengan menentukan tingkat profitabilitas yang akan bervariasi akibat perubahan parameter sensitivitas. Parameter investasi yang menjadi parameter sensitivitas pada penelitian ini yaitu biaya produksi dan harga jual. Penilaian sensitivitas terhadap nilai ","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"107 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":"125112239","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 Geometri Jalan Terhadap Konsumsi Bahan Bakar pada Kegiatan Penambangan Batubara PT Pacific Global Utama di Kecamatan Tanjung Agung, Kabupaten Muara Enim, Provinsi Sumatera Selatan","authors":"Vallen Aurelio Gemilang, Zaenal, I. Wijaksana","doi":"10.29313/bcsme.v3i1.6202","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.6202","url":null,"abstract":"Abstract. PT Pacific Global Utama is a company engaged in the coal mining industry. Coal mining activities use digging-loading and hauling equipment using the Komatsu PC400 Lc Excavator and the Volvo A40F Articulated Dumptruck. There is a company Fuel Ratio target of 0.4 liters/BCM, which was not achieved as a result of the road geometry not conforming to standards. Efforts to reduce the Fuel Ratio are by studying the geometry of the haul road and making efforts to improve the haul road in order to increase the efficiency of fuel use for the transportation equipment. The purpose of this study is to optimize the mine road geometry which affects fuel consumption. The theory used in this study is based on AASHTO, and Minister of Energy and Mineral Resources Decree 1827K No. 30 of 2018. Production calculations are obtained by taking direct coal mining activities, while road geometry is measured using a roll meter, compass, and GPS, and validated using a map. Contours made using drones. The production of the digging equipment was 225.68 BCM/hour while the means of transportation were 225.43 BCM/hour, with the fuel consumption of the digging and loading equipment being 39.41 liters/hour/tool and the transportation equipment being 23.69 liters/hour/equipment. This study also examines the Fuel Ratio (FR) and Fuel Cost (FC) of transportation equipment before and after the road improvement recommendations, the actual FR is 0.52 liters/BCM with an actual FC of RP 2,029,885.51/shift/tool. Recapitulation of road repairs can increase the production of transportation equipment to 298.54 BCM/hour. There are changes in FR and FC in the road repair recommendations where FR becomes 0.397 liters/BCM and FC becomes RP 1,532,814.74/shift/equipment. \u0000Abstrak. PT Pacific Global Utama adalah salah satu perusahaan yang bergerak di bidang industri pertambangan batubara. Kegiatan penambangan batubara menggunakan alat gali-muat dan angkut memakai Excavator Komatsu PC400 Lc dan Articulated Dumptruck Volvo A40F. Terdapat target Fuel Ratio perusahaan sebesar 0,4 liter/BCM, yang tidak tercapai akibat dari geometri jalan yang tidak sesuai dengan standar. Usaha untuk menurunkan Fuel Ratio tersebut dengan cara mengkaji geometri jalan angkut dan melakukan upaya perbaikan jalan angkut guna meningkatkan efisiensi penggunaan bahan bakar alat angkut. Tujuan dari penelitian ini yaitu untuk mengoptimalkan geometri jalan tambang yang berpengaruh terhadap konsumsi bahan bakar. Teori yang digunakan pada penelitian ini didasarkan pada AASHTO, dan Kepmen ESDM 1827K No.30 tahun 2018. Perhitungan produksi didapatkan dengan pengambilan langsung kegiatan penambangan batubara, sedangkan untuk geometri jalan diukur menggunakan alat bantu roll meter, kompas, dan GPS, serta divalidasi menggunakan peta kontur yang dibuat dengan menggunakan drone. Produksi alat gali-muat sebesar 225,68 BCM/jam sedangkan alat angkut 225,43 BCM/jam, dengan konsumsi bahan bakar alat gali-muat 39,41 liter/jam/alat dan alat ","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"27 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":"123778017","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":"Rancangan Crushing Plant Tambang Sirtu di CV Barokah Laksana Jaya, Desa Margaluyu, Kecamatan Leles, Kabupaten Garut, Provinsi Jawa Barat","authors":"Gilar Antarfallah, Sri Widayati, Sriyanti","doi":"10.29313/bcsme.v3i1.6285","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.6285","url":null,"abstract":"Abstract. CV Barokah Laksana Jaya is one of the companies engaged in the mining industry sector that produces mining materials. The company is located in Seungkeu Village, Sukamukti Village, Banyuresmi District, Garut Regency, West Java Province. In an effort to meet market needs and increase the value and marketability of minerals (Sirtu), CV. Barokah Laksana Jaya will plan sirtu processing activities to improve the quality of sirtu production to meet the needs of raw materials for infrastructure development. In increasing the selling power of sirtu from mining, CV. Barokah Laksana Jaya designed a crushing plant with a production target of 100 tons/hour. The processing design that is made is the preparation stage, namely reducing the size of the mined minerals and then grouping them into certain fractional sizes that have been planned by the company according to market needs. There are several tools used in the crushing plant including feeding using a grizzly feeder, primary crushing using a jaw crusher, secondary using a cone crusher, sizing using a vibrating screen, then there are supporting tools used to facilitate the transportation and feeding process, namely belt conveyors  and hoppers. Processing is carried out with the number of incoming feeds of 100 tons/hour. The tools used in this design are one hopper unit with a capacity adapted to feed of 71.5 m3,one grizzly feeder ZSW – 380 x 95II, one jaw crusher with PE type – 60 x 900 VI, one cone crusher with type PYB-1200, one unit vibrating screen with type 2YK – 1548 and 5 units belt conveyor. The final product produced according to the company's request is divided into 3 products, namely fraction 1 (-20 mm – 10 mm), fraction 2 ( -10 mm + 5 mm), Fraction 3 / milled sand (-5 mm) with the amount of production reached according to the plan that is equal to 100 tons / hour. \u0000Abstrak. CV. Barokah Laksana Jaya merupakan salah satu perusahaan yang bergerak pada sektor industri pertambangan yang memproduksi bahan galian sirtu, Perusahaan ini berlokasi di Kampung Seungkeu, Kelurahan Sukamukti, Kecamatan Banyuresmi, Kabupaten Garut, Provinsi Jawa Barat. Dalam upaya memenuhi kebutuhan pasar dan meningkatkan nilai dan daya jual bahan galian (Sirtu), CV. Barokah Laksana Jaya akan melakukan perencanaan kegiatan pengolahan sirtu untuk meningkatkan kualitas produksi sirtu untuk memenuhi kebutuhan bahan baku pembangunan infrastruktur. \u0000Dalam meningkatakan daya jual sirtu dari hasil penambangan, CV. Barokah Laksana Jaya melakukan perancangan crushing plant dengan target produksi 100 ton/jam. Rancangan pengolahan yang dibuat merupakan tahap preparasi yaitu pengecilan ukuran terhadap bahan galian yang ditambang dan kemudian dikelompokan menjadi ukuran – ukuran fraksi tertentu yang sudah direncanakan oleh perusahaan sesuai dengan kebutuhan pasar. Terdapat beberapa alat yang digunakan dalam tahap crushing plant diantaranya meliputi pengumpanan menggunakan, grizzly feeder, primary crushing menggunakan jaw crusher","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"46 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":"129910808","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}