Bandung Conference Series: Mining Engineering最新文献

{"title":"Studi Pendahuluan Efektivitas Penggunaan Fly Ash Dalam Pengolahan Air Asam Tambang Pada Tambang Batubara Di PT XYZ Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur","authors":"D. Yunita, Sri Widayati, Dudi Nasrudin Usman","doi":"10.29313/bcsme.v3i1.5848","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5848","url":null,"abstract":"Abstract. Based on the Regulation of the Minister of Environment and Forestry of the Republic of Indonesia Number 5 of 2022 concerning Wastewater Treatment for Mining Businesses and Activities, the resulting coal wastewater must meet the established standard quality standards it is necessary to treat wastewater so that it does not pollute the environment environment and interfere with human health. Management of acid mine drainage can be done by adding chemicals to neutralize the pH of acid mine drainage, one of which is by using fly ash. This research was conducted to determine the effectiveness of the use of fly ash in neutralizing the pH of the water and reducing the levels of Fe and Mn metals in the settling pond using several measurement and testing parameters, namely measuring the degree of acidity and testing the levels of Fe and Mn metals. The test results for 31 days showed that the average incoming water discharge was 614,462 l/day, the average pH value before handling was 5.64, the moderate Fe metal content before handling was 8.58 mg/l, and the average Mn content before handling of 5.60 mg/l. From the test results, it was found that the required amount of fly ash was 16,066 g/day. The effectiveness of increasing the average pH was 20.52%, the effectiveness of reducing Fe metal levels was 46.37%, and the effectiveness of reducing Mn levels was 40.99%. \u0000Abstrak. Berdasarkan Peraturan Menteri Lingkungan Hidup Dan Kehutanan Republik Indonesia Nomor 5 Tahun 2022 Tentang Pengolahan Air Limbah Bagi Usaha dan/atau Kegiatan Pertambangan bahwa air limbah batubara yang dihasilkan harus memenuhi nilai baku mutu standar yang sudah ditetapkan, maka perlu dilakukan pengolahan air limbah agar tidak mencemari lingkungan sekitar dan mengganggu kesehatan manusia. Pengolahan air asam tambang dapat dilakukan dengan menambahkan bahan kimia untuk menetralkan pH air asam tambang, salah satunya dengan menggunakan fly ash. Penelitian ini dilakukan untuk mengetahui efektivitas penggunaan fly ash dalam menetralkan pH air dan menurunkan kadar logam Fe dan Mn di settling pond dengan menggunakan beberapa parameter pengukuran dan pengujian, yaitu pengukuran derajat keasaman dan pengujian kadar logam Fe dan Mn. Hasil pengujian selama 31 hari didapatkan rata – rata debit air yang masuk sebesar 614.462 l/hari, rata – rata nilai pH sebelum penanganan sebesar 5,64, rata – rata kadar logam Fe sebelum penanganan sebesar 8,58 mg/l, dan rata – rata kadar logam Mn sebelum penanganan sebesar 5,60 mg/l. Dari hasil pengujian tersebut didapatkan jumlah kebutuhan fly ash sebesar 16.066 g/hari. Efektivitas kenaikan pH rata – rata sebesar 20,52%, efektivitas penurunan kadar logam Fe rata – rata sebesar 46,37%, dan efektivitas penurunan kadar logam Mn rata – rata sebesar 40,99%.","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":"129944653","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 Produksi Alat Gali Muat dan Alat Angkut pada Pemindahan Overburden Penambangan Batubara PT Duta Tambang Rekayasa di Kabupaten Nunukan, Provinsi Kalimantan Utara","authors":"Adam Sutodrono, Zaenal, Sriyanti","doi":"10.29313/bcsme.v3i1.6615","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.6615","url":null,"abstract":"Abstract. The research method used is to make measurements first, such as available time, productive time, inhibition time, circulation time, bucket capacity, material weight, material volume. The measurement of cycle time is aimed at digging and loading equipment and conveyance pairs in one mining cycle. The data processing carried out is looking for production and efforts to increase production on overburden removal. Environmental conditions in the 2017-2021 timeframe have an average rainfall of 219.25 mm/year. The efficiency of the loading and digging equipment is 77.92%, while for the transportation equipment it is 80.40%. The circulation time obtained for the digging equipment is 26.87 seconds or 0.45 minutes, and for the transportation equipment it is 5.47 minutes. The Swell Factor obtained was 79.86%, and the Fill Factor was 85.05%. Production results of loading and unloading equipment amounted to 473,20 tons/hour, and transportation equipment amounted to 473,98 tons/hour. The compatibility value of the tool is 0.97. The production target was 558.60 tons/hour. From this target, the production of loading and hauling equipment had not been achieved, then the compiler made efforts to improve production. \u0000Abstrak. Metode penelitian yang dilakukan adalah melakukan pengukuran terlebih dahulu, seperti waktu tersedia, waktu produktif, waktu hambatan, waktu edar, kapasitas bucket, berat material, volume material. Pengukuran waktu edar ditujukan pada alat gali-muat serta pasangan alat angkut dalam satu siklus penambangan. Pengolahan data yang dilakukan adalah mencari produksi dan upaya peningkaan produksi pada pemindahan overburden. Kondisi lingkungan dalam rentang waktu 2017-2021 memiliki curah hujan rata-rata 219,25 mm/tahun. Efisiensi alat gali muat sebesar 77,95 %, sedangkan untuk alat angkut senilai 80,45 %. Waktu edar yang didapatkan pada alat gali muat sebesar 26,87 detik atau 0,45 menit, serta untuk alat angkut sebesar 5,47 menit. Swell Factor yang didapatkan sebesar 79,88 %, dan Fill Factor sebesar 85,05 %. Hasil Produksi alat gali muat sebesar 473,20 ton/jam, serta alat angkut sebesar 473,98 ton/jam. Nilai keserasian alat adalah 0,97. Target produksi adalah 558,60 ton/jam dari target tersebut produksi alat gali muat dan angkut belum tercapai, kemudian penyusun melakukan upaya perbaikan produksi.","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":"114564047","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 Penambangan Emas Underground di Area Penambangan Ciguha PT Antam Tbk, UBPE Pongkor, Kabupaten Bogor, Provinsi Jawa Barat","authors":"A. Purnawarman, Sriyanti, Elfida Moralista","doi":"10.29313/bcsme.v3i1.6167","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.6167","url":null,"abstract":"Abstract. In the Ciguha mining area which is located at PT Aneka Tambang Tbk, UBPE Pongkor, Bogor Regency, West Java Province, there is a change in the quantity of air in the mine ventilation system. A decrease in air quantity occurs in the auxiliary fan along with the flexible duct which causes a decrease in the air discharge and there is an air leakage in the area around the main fan which causes the air to come back out. The maximum limit for reducing air discharge determined by the company is 15%. Therefore, it is necessary to conduct research with the aim of knowing the decrease in air flow in the 37 kW auxiliary fan blower with a new fan condition, 22 kW exhaust 40 m long, and the percentage of air leaks in the main fan area. The research was conducted on mine ventilation components in the form of a 37 kW auxiliary fan type blower with a 40 m long flexible duct located on XC-486 and a 22 kW exhaust fan with a 40 m long flexible duct located on XC-481 as well as for a 132 kW main fan located at CGRB-3, 75 kW main fan located at RM-3 CGT and RM-6 CGS Lower. In this study, primary data were used in the form of air velocity, dimensions of the leakage area holes, flexible duct distance, and tunnel dimension and secondary data in the form of air discharge from the fan specifications. Primary and secondary data processing is caried out in order to determine the air discharge which can later be calculated by the percentage of reduction and the area of leakage on the main fan. The percentage for the air reduction for the auxiliary fan with the 37 kW blower fan located at XC-481 which is 23,96%, and for a 22 kW exhaust fan which is a number 33,40% which based on this value, the two auxiliary fans did not meet the standard values determined by the company. The percentage of air leakage around the 132 kW main fan located at CGRB-3 is 0,23%, the 75 kW main fan located at RM-3 CGT is 0,97%, and the 75 kW main fan located at RM-6 CGS is 0,73. Based on this percentage value, the main fan still meets the standards set by the company. \u0000Abstrak. Pada area penambangan Ciguha yang berada di PT Aneka Tambang Tbk, UBPE Pongkor, Kabupaten Bogor, Provinsi Jawa Barat terjadi penurunan kuantitas udara pada sistem ventilasi tambang. Penurunan kuantitas udara terjadi pada auxiliary fan beserta flexible duct yang menyebabkan adanya penurunan debit udara dan terdapat kebocoran udara pada area sekitar main fan yang menyebabkan udara keluar kembali. Batas maksimal penurunan debit udara yang ditentukan oleh perusahaan yaitu 15%. Oleh karena itu, perlu dilakukan penelitian dengan tujuan mengetahui penurunan debit udara pada auxiliary fan blower 37 kW dengan kondisi fan baru, exhaust 22 kW sepanjang 40 m, serta persentase kebocoran udara pada area main fan. Penelitian dilakukan pada komponen ventilasi tambang berupa auxiliary fan jenis blower 37 kW dengan panjang flexible duct 40 m yang terletak di XC-486 dan fan exhaust 22 kW dengan panjang flexible duct 40 m yang terletak d","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"17 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":"121425914","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 Produksi Alat Gali-Muat dan Angkut pada Penambangan Batu Gamping PT Akarna Marindo di Desa Cipatat Kecamatan Cipatat, Kabupaten Bandung Barat, Provinsi Jawa Barat","authors":"Arrmandha Alghifari, Iswandaru, Elfida Moralista","doi":"10.29313/bcsme.v3i1.5404","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5404","url":null,"abstract":"Abstract. Limestone mining activities at PT Akarna Marindo include digging-loading and hauling activities, this activity is very important in mining activities because it involves achieving production targets. The problem in this study was not achieving the production target of 20,000 tons/month, because of this a technical study was carried out on loading and hauling equipment aimed at calculating actual production, knowing the factors that influence actual production, knowing match factors, and knowing efforts to increase production. The research was conducted in the mining area at location A, by observing the activities of digging, loading and transporting 1 Excavator PC-200 and 2 DT Hino FM 260 JD. The data collected is primary data including road geometry, number of digging-loading and hauling equipment, productive work time, cycle time of digging-loading and hauling equipment, inhibition time, in-situ density, loose density, swell factor and fill factor. Secondary data includes production targets, administrative maps, topography, geology, annual rainfall, specifications for digging and hauling equipment. Production of digging and loading equipment is 13.605,9 tons/month and transportation equipment is 13.521,1 tons/month, with an MF value of 0.83 (MF < 1). The production results did not reach the production target of 20,000 tons/month, the reasons for not achieving the production target were due to time constraints, not ideal road geometry, and less than optimal speed of the conveyance. Because of this, improvements were made to the road geometry, work efficiency and the cycle time of the transportation equipment, the results of the improvements were able to increase the production of the transportation equipment to 20.208,75 tons/month. \u0000Abstrak. Kegiatan penambangan batu gamping di PT Akarna Marindo meliputi aktivitas gali-muat dan angkut, aktivitas ini merupakan hal yang sangat penting dalam kegiatan penambangan karena menyangkut ketercapaian target produksi. Permasalahan dalam penelitian ini adalah tidak tercapainya target produksi sebesar 20.000 ton/bulan, karena itu dilakukan kajian secara teknis alat-gali muat dan angkut bertujuan untuk menghitung produksi aktual, mengetahui faktor-faktor yang memengaruhi produksi aktual, mengetahui match factor, dan mengetahui upaya untuk meningkatkan produksi. Penelitian dilakukan pada area penambangan lokasi A, dengan mengamati aktivitas penggalian, pemuatan dan pengangkutan 1 alat gali-muat Excavator PC-200 dan 2 alat angkut DT Hino FM 260 JD. Data yang dikumpulkan adalah data primer meliputi geometri jalan, jumlah alat gali-muat dan angkut, waktu kerja produktif, waktu edar alat gali-muat dan angkut, waktu hambatan, density insitu, density loose, swell factor dan fill factor. Data sekunder meliputi target produksi, peta administrasi, topografi, geologi, curah hujan tahunan, spesifikasi alat gali-muat dan angkut. Produksi alat gali-muat 13.605,9 ton/bulan dan alat angkut 13.521,1 ton/bulan, denga","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"44 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":"126555246","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 Pengaruh Geometri Jalan Terhadap Konsumsi Bahan Bakar Alat Angkut pada Jalan Tambang Quarry Batu Andesit di PT Silva Andia Utama Desa Giri Asih, Kecamatan Batujajar, Kabupaten Bandung Barat, Provinsi Jawa Barat","authors":"Taufiq Maulana Akbar, Iswandaru, Noor Fauzi Isniarno","doi":"10.29313/bcsme.v3i1.6231","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.6231","url":null,"abstract":"Abstract. PT Silva Andia Utama is a company engaged in the andesite mining industry, using the Quarry mining method. PT Silva Andia Utama has set a production target of 637.2 BCM/day or 95.18 BCM/hour. However, the production target was not achieved due to several factors, one of which is the road geometry factor in the field including road width, road slope, cross slope, superelevation, and bend radius. this also affects the use of fuel in dump truck engines so there may be a potential for swelling in operational costs, especially in terms of fuel costs. Therefore, it is necessary to study the geometry of the mining road so that production targets are achieved and maximize fuel use and minimize operational costs, especially fuel costs. This research was conducted by observing the hauling process from the loading point to the dumping point with a distance of 0.60 km and divided into 23 road segments. The actual data taken includes road width, road slope, cross slope, superelevation, corner radius, cycle time, productive time, fill factor, swell factor, and fuel consumption of mechanical devices. Then calculations for the production of loading and transportation equipment, fuel consumption, fuel ratio, and fuel costs are carried out so that the actual calculation results are compared with the calculations after repairs following Ministerial Decree 1827 K/30/Mem/2018 and the American Association of State Highway and Transportation Officials (AASHTO). Based on the calculations, the average production of the means of transportation is 86.76 BCM/hour with fuel consumption of 5.62 liters/hour for the means of transportation. The actual average fuel ratio of the means of transportation of 0.26 liters/BCM and the actual fuel consumption per trip of the means of transportation is 1.06 liters/rite. The actual fuel cost of the conveyance is Rp. 16,113,000. After re-evaluating the road geometry following the Ministerial Decree 1827 K/30/MEM/2018 standard by changing the slope from 13.42% - 21.22% to a maximum of 12% so that the travel time for transportation equipment becomes faster. For the production of transportation equipment after the repair of 108.54 BCM/hour, there was an increase of 26.25%, the fuel consumption of the transportation equipment after the repair was 4.45 liters/hour there was a decrease of 20.82%, and the fuel consumption per iteration after the repair was 0. 66 liter/rite decreased 37.73%. The fuel ratio after repairs for transportation equipment is 0.16 liters/BCM and for transportation equipment fuel costs after repairs are Rp. 10,136,622 decreased by 37.09%. \u0000Abstrak. PT Silva Andia Utama merupakan salah satu perusahaan yang bergerak dalam industri pertambangan bahan galian batu andesit dengan menggunakan metode penambangan Quarry.  PT Silva Andia Utama menetapkan target produksi sebesar 637,2 BCM/hari atau 95,18 BCM/jam. Akan tetapi, target produksi tersebut tidak tercapai dikarenakan beberapa faktor salah satunya yaitu faktor geom","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"83 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":"121123403","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 Produksi Pengupasan Overburden di Tambang Batubara Pit KAI 1 PT Kurnia Alam Investama Kecamatan Batin XXIV, Kabupaten Batanghari, Provinsi Jambi","authors":"Muhammad Rizky Amendra, Iswandaru, Noor Fauzi Isniarno","doi":"10.29313/bcsme.v3i1.6040","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.6040","url":null,"abstract":"Abstract. PT Karunia Alam Investama is a coal mining company located in Hajran Village, Batin xxiv District, Batanghari Regency, Jambi Province. The applied mining system is an open pit mining system with top loading and its loading pattern. The loading process is carried out using the Hitachi zaxis excavator and the transport people using the Scania P360 Dump Truck. The hauling distance from the mining front to the dumping area is 150 ±. The problem that occurs is that the production target of 88385.9 BCM/month has not been achieved from the actual calculation of overburden production, based on the calculation results it can be seen that the production is 76038.77 BCM/month. The data collected is in the form of conveyor load time, conveyance cycle time, swelling factor, bowl filling factor, roads, work resistance, mechanical device specifications. Efforts were made to achieve the production target, namely by increasing the effective working time from the time constraint so that the work efficiency of the conveyance increased from 60.39% to 64.59% and the addition of 1 unit of Dump Truck Scania P360 conveyance. so that production increased from 76038.77 BCM/month to 92957.24 BCM/month. \u0000Abstrak. PT Karunia Alam Investama merupakan sebuah perusahaan pertambangan batubara yang berlokasi Desa Hajran Kecamatan Batin xxiv, Kabupaten Batanghari, Provinsi Jambi. Sistem penambangan yang diterapkan adalah sistem tambang terbuka dengan dan pola pemuatannya yaitu top loading. Proses pemuatan dilakukan dengan menggunakan Excavator hitachi zaxis dan peroses pengangkutan menggunakan Dump Truck Scania P360 . Jarak angkut dari front penambangan menuju dumping area 150 ±. Permasalahan yang terjadi adalah belum tercapainya target produksi sebesar 88385,9 BCM/Bulan dari perhitungan produksi overburden dilakukan secara aktual, berdasarkan hasil perhitungan dapat bahwa produksi sebesar  76038,77 BCM/Bulan. Data yang dikumpulkan berupa waktu edar alat muat, waktu edar alat angkut, faktor pengembangan, faktor pengisian mangkuk, jalan, hambatan kerja, spesifikasi alat mekanis. Upaya yang dilakukan agar target produksi tercapai yaitu dengan meningkatkan waktu kerja efektif dari waktu hambatan sehingga efisiensi kerja alat angkut meningkat dari 60,39% menjadi 64,59% dan penambahan 1 unit alat angkut Dump Truck Scania P360. sehingga produksinya meningkat dari 76038,77 BCM/Bulan menjadi 92957,24 BCM/Bulan.","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"61 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":"121753981","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 Merangin Provinsi Jambi","authors":"Muhammad Fu'ad, Elfida Moralista, Noor Fauzi Isniarno","doi":"10.29313/bcsme.v3i1.5652","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5652","url":null,"abstract":"Abstract. The Conveyor is a tool to move material from one place to another efficiently. Conveyor structures are made of steel that is subject to corrosion caused by certain conditions such as environmental conditions. Corrosion can cause thickness reduction and reduce the remaining life of the Conveyor structure. In this study, the Conveyor structure consists of 3 segments with a total of 27 Test points along 114 meters. This study aims to determine the type of corrosion, corrosion control, Corrosion Rate, and Remaining Service Life of the Conveyor structure. The research methodology used is to measure the thickness reduction on the Conveyor structure with the Ultrasonic Thickness Gauge TT 130. This research area has environmental conditions, namely air temperature around 26,7OC – 28,4OC, rainfall around 56,50 mm – 482,80 mm, and the highest relative humidity is 89,3%. The type of corrosion that occurs in the Conveyor structure is uniform corrosion. The corrosion control method uses a Coating method with a Thre layer system. The Coating method for Primer Coating uses Seaguard 5000, Intermediate Coating uses Sherglass FF, and Top Coating uses aliphatic acrylic modified polyurethane. Conveyor structure Corrosion Rate ranges from 0,19 - 0,34 mm/year and based on the relative corrosion resistance of steel is included in the good category. The service life of the Conveyor structure is 7 years and the Remaining Service Life is between 6,41 – 8,89 years. So that there are 48% of Test points that are not reach the design life of 15 years. \u0000  \u0000Keywords: Conveyor Structure, Carbon Steel, Coating, Corrosion Rate, Remaining Service Life \u0000  \u0000Abstrak. Conveyor merupakan alat untuk memindahkan suatu material dari satu tempat ke tempat lainnya secara efisien. Struktur Conveyor terbuat dari bahan baja yang rawan mengalami korosi yang disebabkan oleh kondisi lingkungan sekitar. Korosi dapat menyebabkan pengurangan ketebalan dan mengurangi sisa umur pakai struktur Conveyor, sehingga diperlukan adanya kegiatan pengecekan secara berkala terhadap korosi agar dapat mencegah terjadinya korosi. Penelitian ini dilakukan pada struktur Conveyor yang terdiri dari 3 segmen dengan jumlah 27 Test point sepanjang 114 meter. Penelitian bertujuan untuk mengetahui jenis korosi, Pengendalian korosi, laju korosi dan sisa umur pakai pada struktur Conveyor. Metodologi dalam penelitian adalah pengukuran pengurangan ketebalan pada struktur Conveyor dengan alat Ultrasonic Thickness Gauge TT 130. Daerah penelitian memiliki kondisi lingkungan yaitu temperatur udara sekitar 26,7OC – 28,4OC, curah hujan sekitar 56,50 mm – 482,80 mm, dan kelembaban relatif dengan nilai tertinggi yaitu 89,3%. Jenis korosi yang terjadi pada struktur Conveyor adalah korosi merata. Metode pengendalian korosi menggunakan metode Coating dengan sistem Three layers. Metode Coating untuk Primer Coating menggunakan Seaguard 5000, Intermediate Coating menggunakan Sherglass FF, dan Top Coating menggunakan aliphatic acryl","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"79 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":"114731556","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 Tambang Terhadap Produksi Alat Angkut Tambang Batubara PT Hillconjaya Sakti Jobsite Sebuku Tanjung Coal, Kecamatan Pulau Laut Tengah, Kabupaten Kotabaru, Provinsi Kalimantan Selatan","authors":"Ahmad Heriansyah, Iswandaru, Noor Fauzi Isniarno","doi":"10.29313/bcsme.v3i1.6076","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.6076","url":null,"abstract":"Abstract. PT Hillconjaya Sakti is a mining contractor company whose job is to strip coal and overburden with an overburden production target of 291.937 BCM/month on one of the PC 2000 excavator loaders with actual production of 266.043 BCM/month. The problem in this study is the design of the overburden stripping haul road which is not ideal causing less than optimal productivity. So it is necessary to evaluate the geometry of the road which aims to determine the ideal haul road design, compare the target production of the conveyance with production after repair and find out the cycle time of the conveyance in overburden hauling activities .The research was conducted in the overburden area from front loading to disposal at South T3 Pit with HD Sanyi SRT 95C conveyor with a capacity of 42 m2. The data collected is crossslope, superelevation and maximum speed of the conveyance under certain road grade conditions and also the T-junctions formed on the haul road.. In the research results there are many road segments that have not reached the ideal criteria in road geometry, especially in the front loading area. The results of calculating the ideal geometry are 21,33 m for one lane, 25,55 m for bends, 1,02 m super elevation and 42,6 cm crossslope. The results of road repairs will cause a decrease in the circulation time or cycle time of the transportation equipment, there is a change in the cycle time of the transportation equipment, namely 13,97 minutes, 14,3 minutes, 14,02 minutes, 14,05, 14,2 minutes to 10,48 minutes so there was an increase in the production of transportation equipment to 336.982 BCM/month. \u0000Abstrak. PT Hillconjaya sakti merupakan perusahaan kontraktor penambangan yang bertugas dalam melakukan pengupasan batubara dan overburden dengan target produksi overburden sebesar 291.937 BCM/bulan pada salah satu alat muat excavator PC 2000 dengan produksi aktual 266.043 BCM/bulan. Permasalahan dalam penelitian ini adalah perancangan pada jalan angkut pengupasan overburden yang tidak ideal menyebabkan produktivitas kurang optimal. Maka perlu dilakukan evaluasi geometri jalan yang bertujuan untuk melakukan penentuan rancangan jalan angkut ideal, melakukan perbandingan target produksi alat angkut dengan produksi setelah perbaikan dan Mengetahui cycle time dari alat angkut pada kegiatan pengangkutan overburden.. Penelitian dilakukan pada area overburden dari front loading ke disposal di Pit T3 Selatan dengan alat angkut HD Sanyi SRT 95C dengan kapasitas 42 m2. Data yang dikumpulkan adalah data crossslope, superelevasi serta kecepatan maksimal alat angkut dalam kondisi grade jalan tertentu dan juga pertigaan yang terbentuk pada jalan angkut.. Pada hasil penelitian terdapat banyak segmen jalan yang belum mencapai dari kriteria ideal pada geometri jalan khusus nya pada daerah front loading. Hasil dari perhitungan geometri ideal yaitu 21,33 m untuk satu jalur,jalur tikungan 25,55 m, superelevasi 1,02 m dan crossslope 42,6 cm. Hasil perbaikan jalan ","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"47 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":"134395345","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":"Optimasi Pencampuran Batubara Dalam Upaya Meningkatkan Kualitas di PT Bukit Asam, Tbk. Tanjung Enim, Sumatera Selatan","authors":"Alditiya Nurrosyidi, Solihin, Sri Widayati","doi":"10.29313/bcsme.v3i1.5633","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5633","url":null,"abstract":"Abstract. PT Bukit Asam, Tbk. is a coal commodity mining industry company located in Lawang Kidul District, Muara Enim Regency, South Sumatra Province. Data collection of coal products resulting from mining called mine brand. Mining is carried out from the Air Laya Mine pit (TAL), Muara Tiga Besar pit (MTB), and Bangko pit which produces 16 Mine brands namely AL 49, AL 51, AL 53, AL 55, AL 59, AL 61, AL 63, AL 65, AL 67HV, AL 71MV, AL 69HV, AL 71LV, BB 47, BB 51, BB 53, and MT 47. Mine brands must meet market brand criteria according to consumer needs. In May 2022, consumer demand for market brand BA 48 was 538,231 tons with criteria of total moisture ≤ 30%, ash content ≤ 8%, and calorific value ≥ 4,800 kcal/kg, and market brand BA 50 was 311,814 tons with criteria of total moisture ≤ 28%, ash content ≤ 7%, and calorific value ≥ 5,000 kcal/kg. To meet consumer demand, it is necessary to maximize coal blending carried out by the company, so a coal blending optimization simulation is carried out using the simplex method calculation in a linear program with POM-QM For Windows software as a tool for applying the simplex method. The results of BA 48 market brand coal blending obtained a proportion of 60.73% BB 51, and 39.27% MT 47 with total moisture parameters of 29.81%, ash content of 3.14%, and calorific value of 4,800 kcal/kg, while for BA 50 market brand coal blending obtained a proportion of 52.50% AL 49 and 47.50% BB 53 with total moisture parameters of 27.75%, ash content of 2.81%, and calorific value of 5,000 kcal/kg. \u0000Abstrak. PT. Bukit Asam, Tbk. merupakan perusahaan industri pertambangan komoditas batubara berlokasi di Kecamatan Lawang Kidul, Kabupaten Muara Enim, Provinsi Sumatera Selatan. Pengambilan data produk batubara hasil dari penambangan yang disebut mine brand. Penambangan dilakukan dari pit Tambang Air Laya (TAL), pit Muara Tiga Besar (MTB), dan pit Bangko yang menghasilkan 16 Mine brand yaitu AL 49, AL 51, AL 53, AL 55, AL 59, AL 61, AL 63, AL 65, AL 67HV, AL 71MV, AL 69HV, AL 71LV, BB 47, BB 51, BB 53, dan MT 47. Mine brand harus memenuhi kriteria market brand sesuai kebutuhan konsumen. Pada bulan Mei 2022 permintaan konsumen untuk market brand BA 48 sebanyak 538.231 ton dengan kriteria total kelembaban ≤ 30%, kandungan abu ≤ 8%, dan nilai kalori ≥ 4.800 kkal/kg, dan market brand BA 50 sebanyak 311.814 ton dengan kriteria total kelembaban ≤ 28%, kandungan abu ≤ 7%, dan nilai kalori ≥ 5.000 kkal/kg. Untuk memenuhi permintaan konsumen perlu memaksimalkan pencampuran batubara yang dilakukan oleh perusahaan, maka dilakukan simulasi optimasi pencampuran batubara yang dilakukan menggunakan perhitungan metode simpleks dalam program linier dengan software POM-QM For Windows sebagai alat penerapan metode simpleks. Hasil dari pencampuran batubara market brand BA 48 mendapatkan proporsi sebesar 60,73% BB 51, dan 39,27% MT 47 dengan parameter total kelembaban 29,81%, kandungan abu 3,14%, dan nilai kalori 4.800 kkal/kg, sedangkan untuk penc","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114518036","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":"Studi Pendahuluan Pengaruh Fly Ash pada Netralisasi Air Asam Tambang di Penambangan Batubara PT XYZ, Kabupaten Kutai Kartanegara, Provinsi Kalimantan Timur","authors":"Gumilar Rayana, Sri Widayati, Solihin","doi":"10.29313/bcsme.v3i1.5693","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5693","url":null,"abstract":"Abstract. Acid mine drainage can affect water quality in the area which requires an authority to improve water quality in mining areas. So that the neutralization of acid mine drainage must be carried out, one of which is using fly ash. Fly Ash has alkaline properties with a pH value between 4.5 to 12. The pH value of fly ash is determined by the sulfur content of the coal parent material. Therefore fly ash can increase the pH value of acid mine water. The research method used in this study is the active method by mixing fly ash into the water in the settling pond which has a pH value of less than 7, it aims to neutralize the pH value in the settling pond. From the previous testing, it was found that the effect of fly ash on neutralizing acid mine drainage required a fly ash dose of 60 gr/L with a pH value of 7.57, then a linear regression calculation was performed to determine the optimal value of 58.35 gr/L for a pH value of 7. Then The dose was neutralized to acid mine drainage which has a pH value of less than 7, so that a dose value was obtained within 31 days of 632.21 gr/L or 381.532 kg/month. In addition to the effect of fly ash on the pH value, a calculation of the effect of fly ash with the same dose of neutralizing the pH value on the decrease in Fe and Mn levels was also carried out. The effect of decreasing the previous Fe content with an average value of 7.33 mg/L becomes 5.57 mg/L, and the effect of the previous Mn content with an average value of 4.32 mg/L becomes 3.56 mg/L \u0000Abstrak. Air asam tambang dapat mempengaruhi kualitas air di daerah tersebut yang membutuhkan suatu kewenangan untuk dapat memperbaiki kualitas air di daerah pertambangan. Sehingga kegiatan penetralan air asam tambang harus dilakukan salah satunya menggunakan Fly ash. Fly Ash memiliki sifat alkalin yang memiliki nilai pH antara 4,5 sampai 12. Nilai pH yang dimiliki fly ash  ditentukan oleh kandungan sulfur bahan induk batubara. Oleh karena itu fly ash dapat menaikan nilai pH air asam tambang. Berdasarkan latar belakang tersebut maka penelitian ini dilakukan untuk mengetahui pengaruh penggunaan fly ash  terhadap proses penetralan air asam tambang. Metode penelitian yang digunakan pada penelitian ini yaitu metode aktif dengan cara mencampurkan fly ash ke dalam air di kolam pengendapan yang memiliki nilai pH kurang dari 7, hal tersebut bertujuan untuk dapat menetralkan nilai pH di kolam pengendapan Dari pengujian yang dilakukan bahwasannya  pengaruh fly ash terhadap penetralan air asam tambang dibutuhkan dosis fly ash sebesar 60 gr/L dengan nilai pH sebesar 7.57, lalu dilakukan perhitungan linier regresi untuk mengetahui nilai optimal sebesar 58.35 gr/L untuk nilai pH 7. Kemudian dosis tersebut dilakukan penetralan terhadap air asam tambang yang memiliki nilai pH kurang dari 7, sehingga didapatkan nilai dosis dalam waktu 31 hari sebesar 632.21 gr/L atau 381.532 kg/bulan.  Selain pengaruh fly ash terhadap nilai pH, juga dilakukan perhitungan pengaruh fly ash denga","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"118 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":"131562080","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}