Bandung Conference Series: Mining Engineering最新文献

{"title":"Interpretasi Tahanan Jenis Dua Dimensi Konfigurasi Wenner untuk Menentukan Struktur Bawah Permukaan di Kota Samarinda Provinsi Kalimantan Timur","authors":"Fadlan Al Anshar, N. F. Isniarno, Dudi Nasrudi Usman","doi":"10.29313/bcsme.v3i2.9044","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.9044","url":null,"abstract":"Abstract. Judging from the regional geological map on the Samarinda sheet, it was found that in the study area there was a very complex structure. Geolistics is a method that can analyze subsurface structures with resistivity values. To identify subsurface conditions, it is necessary to model the results of measurements to strengthen interpretation with geological maps. Geoelectrical measurements were carried out using a 2-dimensional Wenner configuration NeoResist tool with the same distance between electrodes, which will produce an apparent resistivity value, resistivity resulting from software processing, and an apparent resistivity cross-section. Measurements were carried out in four tracks on fairly steep topographical conditions with a spacing of 10 meters between electrodes and a stretch of 400 meters. Acquisition and interpretation of measurement results obtained the lithology of minerals, including sandstone and claystone, and encountered geological structures in geoelectrical measurements. The results of the measurements obtained an indication of the structure on tracks 1, 3, and 4 and an anomaly in the resistivity value because there is a resistivity value that decreases and forms like a structure. On the cross section of track 1, there is a change in resistivity that is indicated to be affected by a rising fault in the western part of the geological map; on track 3, it is found that there is a resistivity filling like a fracture; on track 4, it gets resistivity like a fracture that is almost upright; and it is indicated that in that area, the change results from the influence of trajectory 1. This indication is strengthened by the location of the research area, which is surrounded by a complex structure. \u0000Abstrak. Ditinjau dari peta geologi regional pada lembar samarinda dijumpai bahwa pada daerah penelitian terdapat adanya struktur yang sangat komplek. Geolistik salah satu metode yang dapat menganalisis strukur bawah permukaan dengan nilai resisitivity. Untuk mengidentifikasi kondisi bawah permukaan di perlukan pemodelan hasil dari pengukuran untuk memperkuat interptretasi dengan peta geologi. Pengukuran geolistrik dilakukan menggunakan alat NeoResist konfigurasi wenner 2 dimensi dengan jarak antar elektroda yang sama akan menghasilkan nilai tahanan jenis semu, tahanan jenis hasil dari pengolahan software, Penampang apparent resistivity. Pengukuran dilakukan sebanyak 4 lintasan pada kondisi topografi yang cukup curam dengan jarak antar elektroda 10 meter dan bentangan sepanjang 400 meter. Akuisisi dan interpretasi data hasil pengukuran didapatkan litologi bahan galian diantaranya adalah batupasir dan batulempung, serta di jumpai adanya struktur geologi dalam pengukuran geolistrik. Hasil dari pengukuran didapatkan adanya indikasi struktur pada lintasan 1, 3 dan 4 dan didapatkan anomali pada nilai resistivity di karenakan terdapat nilai resistivity yang menunjam serta membentuk seperti struktur. Pada penampang lintasan 1 terdapat adany","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128710385","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":"Merancang Ulang Geometri Peledakan Berkaitan Dengan Target Produksi Pada Penambangan Batu Granit di PT Karimun Granite Provinsi Kepulauan Riau","authors":"Maylinia Sagita, Yuliadi, Yunus Ashari","doi":"10.29313/bcsme.v3i2.7991","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.7991","url":null,"abstract":"Abstract. PT Karimun Granite is a company engaged in granite mining located in Pasir Panjang Village, West Meral District, Karimun Regency, Riau Archipelago Province. This company is engaged in mining granite with products produced by the company measuring M-Sand (0-5mm), aggregate (5-20mm), and graded stone (38- 50mm). A blasting geometry that is not optimal will determine the success of blasting activities, both fragmentation results and production targets achieved. Based on company standards, the success rate of blasting activities is the percentage of lumps below 10%. In order to produce good fragmentation, many things affect it, namely the blasting geometry, one of the things that can be controlled. So it is necessary to redesign the blasting geometry in order to achieve the production target. Based on the results of production and fragmentation calculations that were analyzed to achieve the production target in a month, the blasting geometry was chosen according to R.L Ash with a burden of 3.3 m, spacing of 4.2 m, sub drill of 0.92 m, and hole depth of 12.92 m producing 433.56 tonnes/hole with 241 holes each month. The resulting fragmentation of the geometry is that the average size of rock fragmentation is 39.48 cm and produces 80cm chunks of 10.29%. Meanwhile, blasting geometry according to C.J Konya burden 3.4 m, spacing 4.5 m, subdrill 0.96 m, and hole depth 12.96 m produces 483.98 tonnes/hole with 222 holes each month. \u0000Abstrak. PT Karimun Granite merupakan salah satu perusahaan yang bergerak dalam bidang pertambangan granit yang berlokasi di Desa Pasir Panjang, Kecamatan Meral Barat, Kabupaten Karimun, Provinsi Kepulauan Riau. Perusahaan ini bergerak dalam pertambangan batuan granit dengan produk yang dihasilkan perusahaan berukuran M-Sand (0-5mm), agregat (5-20mm), dan graded stone (38-50mm). Geometri peledakan yang tidak optimal akan menentukan keberhasilan kegiatan peledakan baik hasil fragmentasi maupun target produksi yang tercapai. Berdasarkan standar perusahaan tingkat keberhasilan dari kegiatan peledakan adalah tingkat presentase bongkah yang dibawah 10%. Untuk menghasilkan fragmentasi yang baik banyak hal yang mempengaruhi yaitu geometri peledakan salah satu hal yang dapat dikontrol. Maka perlu dilakukannya perancangan ulang geometri peledakan agar mencapai target produksi. Berdasarkan hasil perhitungan produksi dan fragmentasi yang dianalisis untuk mencapai target produksi dalam sebulan, maka dipilih geometri peledakan menurut R.L Ash dengan burden 3,3 m, spasi 4,2 m, subdril 0,92 m, dan kedalaman lubang 12,92 m menghasilkan 433,56 ton/lubang dengan jumlah lubang 241 setiap bulannya. Fragmentasi yang dihasilakan dari Geometri tersebut yaitu dengan ukuran rata-rata fragmentasi batuan 39,48 cm dan menghasilkan bongkah ukuran 80cm sebesar 10,29%. Sedangkan geometri peledakan menurut C.J Konya burden 3,4 m, spasi 4,5 m, subdril 0,96 m, dan kedalaman lubang 12,96 m menghasilkan 483,98 ton/lubang dengan jumlah lubang 222 setiap bu","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125693902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monitoring Korosi Discharge Conveyor H pada Tambang Batubara PT XYZ di Kabupaten Banjar Provinsi Kalimantan Selatan","authors":"Dzaky Fajri Saifulloh, Elfida Moralista, Zaenal","doi":"10.29313/bcsme.v3i2.8878","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.8878","url":null,"abstract":"Abstract. Conveyor is a tool used to move material, usually to move material from one place to another. The conveyor structure has the main constituent material, namely carbon steel which is prone to corrosion so that the steel will experience damage which can reduce the service life of the conveyor structure caused by environmental factors. Therefore, it is necessary to control corrosion in order to slow down the rate of corrosion so as to extend the life of the conveyor. The purpose of this study is to determine the type of corrosion, corrosion handling, corrosion rate and remaining service life (RSL) on the conveyor structure. The methodology used in this study is the measurement of the thickness reduction of the conveyor structure. Actual thickness measurement using Ultrasonic Thickness Gauge TT 130, carried out on a conveyor with a length of 96 meters divided into 3 segments and consisting of 25 test points. in 2016-2020 the research locations had an average rainfall of 211.105 mm/year, an air temperature of 25.75°C, and a relative humidity of 81.75%. The type of corrosion that occurs in the conveyor structure is uniform corrosion. The corrosion control method used is coating with a three layer system with primary coating using seaguard 5000 then intermediate coating using sherglass FF and top coating using aliphatic acrylic modified polyurethane. The corrosion rate ranges from 0.1833 to 0.32 mm/year which is classified into the good category referring to the table of relative corrosion resistance of steel. The design life of the conveyor structure is 15 years and the service life is 6 years. The remaining service life obtained from the calculation results is around 8.19 – 12.94 years, as many as 13 of the 25 test points or 48% of the test points cannot reach the design life. \u0000Abstrak. Conveyor ialah alat yang digunakan untuk memindahkan material dari satu tempat ke tempat lainnya. Struktur conveyor  memiliki material penyusun utama yaitu baja karbon yang rentan mengalami korosi sehingga baja akan mengalami pengurangan ketebalan yang dapat mengurangi umur pakai dari struktur conveyor tersebut disebabkan oleh faktor lingkungan. Oleh sebab itu diperlukan pengendalian korosi agar dapat memperlambat laju korosi. Tujuan dari penelitian ini untuk mengetahui jenis korosi, penanganan korosi, mengetahui laju korosi (Corrosion rate) dan remaining service life (RSL) struktur conveyor. Metodologi yang digunakan pada penelitian ini adalah pengukuran pengurangan ketebalan struktur conveyor. Pengukuran tebal aktual menggunakan Ultrasonic Thicness Gauge TT 130, dilakukan pada conveyor dengan panjang 96 meter dibagi menjadi 3 segmen dan terdiri dari 25 test point. Pada tahun 2016-2020 lokasi penelitian  memiliki curah hujan rata-rata 211,105 mm/tahun, temperatur udara sebesar 25,75°C, dan kelembapan relatif sebesar 81,75 %. Jenis korosi yang terjadi pada struktur conveyor yaitu korosi merata. Metode pengendalian korosi yang dilakukan adalah coating dengan si","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124982215","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 Ekonimi Alat Gali-Muat dan Angkut pada Tambang Bijih Nikel di PT Mitra Tambang Gemilang di Kecamatan Pagimana Kabupaten Banggai Provinsi Sulawesi Tengah","authors":"M. I. Akbar, Zaenal, Elfida Moralista","doi":"10.29313/bcsme.v3i2.8383","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.8383","url":null,"abstract":"Abstract. PT Mitra Tambang Gemilang was established in 2018, a company engaged as a mining contractor working on extracting minerals, especially nickel. The mining system used is an open pit mining system using the Selective Mining method. The mining operation area is in Central Sulawesi, in Luwuk Banggai to be precise. In pit 1, PT Mitra Tambang Gemilang has a production target of 600,000 BCM/year and based on mining results, the production of the Sany PC 215 C excavator loading and digging equipment is 586,455.12 BCM/year and the production of the Shacman F2000 dump truck is 581,644.08 BCM/year. year, this research was carried out with the aim of knowing the comparison of production values, comparison of ownership costs and operating costs, comparison of Present Worth Cost (PWC) and Production Unit Cost (PUC) comparisons between old and new digging and loading equipment.The company plans to replace the mechanical equipment with technical and economic assessments. Technical studies include calculating the production value of each tool and for economic studies including ownership costs, operating costs, Present Worth Cost (PWC) and Production Unit Cost (PUC) values. After knowing these values, a comparison is made between the production value and PUC of the old and new equipment so that it can be seen whether the old or new equipment is more profitable. Based on the results of technical and economic studies, the production of new loading and digging equipment was 773,139.06 BCM/year and showed a production increase of 31.83%. The production of new conveyance equipment is 769,994.96 BCM/year with an increase of 32.37%, indicating that the production target has been achieved. Production Unit Cost decreased by 44.96% for digging equipment, from Rp. 3,144.75 / BCM to Rp. 2,169.36 / BCM, while the Production Unit Cost of transportation equipment decreased by 26.28% from IDR 1,862.27 / BCM to IDR 1,469.96 /BCM. These results indicate that the tool needs to be replaced because the production of new tools is greater and the operating costs are more economical than the old tools. \u0000Abstrak. PT Mitra Tambang Gemilang berdiri pada tahun 2018, perusahaan yang bergerak sebagai kontraktor pertambangan yang bekerja pada penggalian mineral terutama nikel. Sistem penambangan  yang digunakan yaitu Sistem Tambang Terbuka dengan menggunakan Metode Selective Mining. Wilayah operasi penambangan berada di Sulawesi Tengah, tepatnya di Luwuk Banggai. Pada Pit 1 PT Mitra Tambang Gemilang memiliki target produksi sebesar 600.000 BCM/tahun dan  berdasarkan hasil penambangan produksi alat gali-muat Excavator Sany PC 215 C adalah 586.455,12 BCM/tahun dan produksi alat angkut Dump Truck  Shacman F2000 adalah 581.644,08 BCM/tahun, maka dilakukan penelitian ini yang bertujuan untuk mengetahui perbandingan nilai produksi, perbandingan biaya kepemilikan dan biaya operasi, perbandingan nilai Present Worth Cost (PWC) dan perbandingan Production Unit Cost (PUC) antara alat gali-muat d","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132634682","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 Banjar, Provinsi Kalimantan Selatan","authors":"Rahma Azizah Kotta, Elfida Moralista, Noor Fauzi Isniarno","doi":"10.29313/bcsme.v3i2.8877","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.8877","url":null,"abstract":"Abstract. Conveyor is a means of conveyance used in the mining industry to move mining materials. The conveyor structure is made of steel which is prone to corrosion as a result of environmental influences which can cause a reduction in thickness and reduce the remaining life of the conveyor structure. This research was conducted to determine the type of corrosion, corrosion control method, corrosion rate, and the Remaining Service Life of the conveyor structure. The methodology used in this research is thickness reduction measurement. The conveyor structure has a length of 96 meters consisting of 3 segments with 25 test points. Measurements were made using a Smart Sensor Ultrasonic Thickness Gauge TT 130. The output obtained is the reduced thickness value which is used to determine the Corrosion Rate and Remaining Service Life. The environmental conditions of the study area in 2015-2020 had an average rainfall of 218.32 mm/year, an average relay humidity of 81.37% and an average temperature 25.92 0C. The type of corrosion that occurs in the conveyor structure is uniform corrosion. The corrosion control method used is the coating method with a three layers system. Coating method for primary coating using Seaguard 5000, Intermediate coating using Sherglass FF, and top coating using allphatic acrylic modified polyurethane. The corrosion rate of the conveyor structure ranges from 0.18 - 0.31 mm/year and based on the relative corrosion resistance of steel it is included in the good category. The service life of the conveyor structure is 7 years and the remaining service life ranges from 6.53 - 9.49 years, so there are 11 test points or 44% test points which are predicted not to reach the design life of 15 years. \u0000Abstrak. Conveyor merupakan alat angkut yang digunakan di industri pertambangan untuk memindahkan bahan tambang. Struktur conveyor terbuat dari baja yang rawan mengalami korosi sebagai akibat pengaruh lingkungannya yang dapat menyebabkan pengurangan ketebalan dan mengurangi sisa umur pakai struktur conveyor. Penelitian ini dilakukan untuk mengetahui jenis korosi, metode mengendalian korosi, laju korosi, dan Remaining Service Life struktur conveyor. Metodologi yang digunakan dalam penelitian ini adalah pengukuran pengurangan ketebalan. Struktur conveyor  memiliki panjang 96 meter yang terdiri dari 3 segmen dengan 25 test point. Pengukuran dilakukan dengan menggunakan Smart Sensor Ultrasonic Thickness Gauge TT 130. Output  yang di dapat adalah nilai pengurangan ketebalan yang digunakan untuk menentukan Laju Korosi dan Sisa Umur Pakai. Kondisi lingkungan daerah penelitian tahun 2015-2020 memiliki curah hujan rata-rata 218,32 mm/tahun, kelembapan relatif rata-rata 81,37% dan suhu rata-rata 25,920C. Jenis korosi yang terjadi pada struktur conveyor  adalah korosi merata. Metode pengendalian korosi yang digunakan yaitu metode coating dengan sistem three layers. Metode coating untuk primer coating menggunakan Seaguard 5000, Intermediate coating meng","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117155067","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 Penambangan Batubara PT Duta Tambang Rekayasa di Kecamatan Sebuku, Kabupaten Nunukan, Provinsi Kalimantan Utara","authors":"Muhammad Alif Adityantono, Zaenal, Indra Karna Wijaksana","doi":"10.29313/bcsme.v3i2.8703","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.8703","url":null,"abstract":"Abstract. Mining activities are carried out using an open pit mining system using a strip mining system. In overburden stripping, mechanical devices such as Backhoe Hitachi ZX870LCH-5G and Dumptruck Scania P380CB are used as conveyance tools. . 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 the productivity of the hauling equipment is carried out with more efficient fuel consumption. In increasing the productivity of hauling equipment with more efficient fuel consumption, several studies were carried out on several parameters, namely road slope, straight road width, bend radius, Superelevation, Cross Slope, Fuel Ratio, and Fuel Cost. The results of the study were then evaluated based on the AASHTO theory with the standard setting for the maximum road slope of 12% and Ministerial Decree No. 1827/K/30/MEM/2018. Based on the results of observations and calculations on field activities, the actual production of the means of conveyance is 344.06 BCM/hour with an average fuel consumption of 13.82 liters/hour. The actual Fuel Ratio value in research activities for transportation equipment is 0.20 liters/BCM, and the Fuel Cost is Rp. 60,067,335 / month/tool. After a study on road geometry, the productivity value increased to 440.42 BCM/hour with a Fuel Ratio of 0.15 liters/BCM, and the Fuel Cost became Rp. 47,044,368 / month/tool, so after repairs the cost decreased by Rp. 13,022,949 / month/tool. Improvements in road conditions affect production, fuel consumption, Fuel Ratio, and Fuel Cost to reduce operational costs in mining. \u0000Abstrak. Kegiatan penambangan dilakukan dengan sistem penambangan terbuka. Dalam pengupasan overburden digunakan alat mekanis seperti alat gali-muat Backhoe Hitachi ZX870LCH-5G dan Dumptruck Scania P380CB sebagai alat angkut. 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. Maka dari itu penelitian ini dilakukan untuk meningkatkan produktivitas alat angkut dengan konsumsi bahan bakar yang lebih efisien. Dalam meningkatkan produktivitas alat angkut dengan konsumsi bahan bakar yang lebih efisien, dilakukan beberapa kajian terhadap beberapa parameter yaitu kemiringan jalan, lebar jalan lurus, lebar jalan tikungan, jari–jari tikungan, Superelevasi, Cross Slope, Fuel Ratio, Fuel Cost. Hasil dari kajian tersebut kemudian di evaluasi berdasarkan teori AASHTO dengan ketetapan standar kemiringan jalan maksimal yaitu 12% dan Kepmen No. 1827/K/30/MEM/2018. Berdasarkan hasil pengamatan dan perhitungan pada kegiatan lapangan, produksi alat angkut aktual adalah 344,06 BCM/jam dengan ratarata konsumsi bahan bakar alat 13,82 liter/jam. Nilai Fuel Ratio secara aktual pada kegiatan penelitian untuk alat angku","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129286144","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 Pemberaian Overburden dengan Metode Ripping pada Tambang Batubara PT Duta Tambang Rekayasa Kecamatan Seimenggaris, Kabupaten Nunukan, Provinsi Kalimantan Utara","authors":"Ayu Ramadhina, Zaenal, Noor Fauzi Isniarno","doi":"10.29313/bcsme.v3i2.8740","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.8740","url":null,"abstract":"Abstract. PT Duta Tambang Rekayasa is a company engaged in coal mining with an IUP of 1,700 Ha. Has a Stripping Ratio (SR) of 12 BCM OB/Ton BB with a coal production target of 50,000 tons per month and an Overburden (OB) stripping target of 600,000 BCM per month. OB stripping based on Rippability in that area is included in the category of using the Ripping Method. The actual results of Ripping production are not yet known, so it is necessary to study both from a technical and economic point of view. The technical review consists of calculating the achievement of productiontargets by analyzing the production of Ripping and digging activities and the need for tools. The study from an economic perspective is the calculation of the estimated cost of the equipment. Data that needs to be analyzed is the production of Bulldozers and Backhoes, economic data in the form of equipment ownership, and operating costs. The study used three tools and observed, namely the Komatsu D375A Bulldozer, the Liebherr 756 Bulldozer, and the Hitachi 870 LCH 8G Backhoe. Based on the research results, it can be analyzed regarding the average Ripping production using the Komatsu D375A Bulldozer of 1440.74 BCM/hour/tool, with a production target of 300,000 BCM/month/tool. This tool has been (fulfilled) with a production yield of 393,782.33 BCM/month/ tools, for the estimated Ripping costs incurred Rp. 2,286.61,- BCM/hour. While the average Ripping production using the Liebherr 756 Bulldozer is 894.52 BCM/hour/tool. Production of the Liebherr 756 Bulldozer (not fulfilled) with a yield of 200,837.45 BCM/month/tool is suggested to add to 2 units of equipment, with an estimated Ripping cost of Rp. 2550.33,- BCM/hour. Hitachi ZX870LCH-5G Backhoe loading and unloading equipment production (not yet fulfilled) with a production output of 130,049.83 BCM/month/tool is suggested to add to 5 units of equipment, with an estimated digging-loading cost of Rp.3,638.32,- BCM/hour. \u0000Abstrak. PT Duta Tambang Rekayasa merupakan perusahaan yang bergerak di bidang pertambangan batubara dengan IUP seluas 1.700 Ha. Memiliki StRipping Ratio (SR) 12 BCM OB/Ton BB dengan target produksi batubara sebesar 50.000 ton per bulan dan  target pengupasan Overburden (OB) sebesar 600.000 BCM per bulan. Pengupasan OB berdasarkan Kemampugaruan (Rippability) pada daerah tersebut termasuk kategori menggunakan Metode Ripping. Belum diketahui secara aktual hasil produksi Ripping maka perlu dilakukan kajian baik dari segi teknis dan ekonomis. Kajian teknis terdiri dari perhitungan pencapaian target produksi dengan analisis produksi aktivitas Ripping dan aktivitas gali-muat dan kebutuhan alat. Kajian dari segi ekonomis yaitu perhitungan estimasi biaya alat. Data yang perlu di analisis berupa produksi Bulldozer dan Backhoe, data ekonomi berupa biaya kepemilikan dan biaya operasi alat. Penelitian menggunakan tiga alat dan yang diamati, yaitu Bulldozer Komatsu D375A, Bulldozer Liebherr 756 dan Backhoe Hitachi 870 LCH 8G. ","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121558293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rencana Teknis dan Biaya Reklamasi Tambang Batubara di PT Bhadra Pinggala Sejahtera Kecamatan Tabang Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur","authors":"Muhammad Mulya Prasetya, N. F. Isniarno, Solihin","doi":"10.29313/bcsme.v3i2.8684","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.8684","url":null,"abstract":"Abstract. Coal mining in Indonesia is generally carried out with an open pit mining system so that it has an impact on environmental damage. The government requires holders of mining business permits to repair land disturbed by mining activities. The government has issued a clear policy regarding reclamation, namely PP No. 78 of 2010 concerning \"Reclamation and Post-mining\" and Ministry of Energy and Mineral Resources Regulation No. 7 of 2014 concerning \"Implementation of Reclamation and Postmining in Mineral and Coal Mining Business Activities\". Studies regarding technical plans and reclamation costs need to be carried out so that reclamation can run optimally. In this research, a study on reclamation planning and reclamation cost calculation was carried out on former Pit C mining with a total area of 131,67 Ha during 2023 to 2027. Technical planning includes studies on land use management, revegetation and maintenance. Calculation of reclamation costs includes the calculation of direct costs and indirect costs, direct costs include land use planning costs, revegetation costs, and maintenance costs while indirect costs include equipment mobilization costs (2.5%), reclamation planning costs (6.5-6 .8%), and supervision costs (4.3-4.9%). Based on the calculations, the direct cost of the reclamation plan for the ex-mining area of Pit C from 2023-2027 is IDR 75.311.443.648 with an indirect cost of IDR 7.042.627.235. The total cost of the planned reclamation activities is IDR 82.354.070.883. \u0000Abstrak. Tambang batubara di Indonesia umumnya dilakukan dengan sistem tambang terbuka (open pit mining) sehingga berdampak terhadap kerusakan lingkungan. Pemerintah mewajibkan pemegang izin usaha pertambangan untuk melakukan perbaikan terhadap lahan terganggu akibat dari aktivitas penambangan. Pemerintah telah mengeluarkan kebijakan yang jelas terkait reklamasi yaitu PP No.78 Tahun 2010 tentang “Reklamasi dan Pascatambang” dan Permen ESDM No. 7 Tahun 2014 tentang “Pelaksanaan Reklamasi Dan Pascatambang Pada Kegiatan Usaha Pertambangan Mineral Dan Batubara”. Kajian mengenai rencana teknis dan biaya reklamasi perlu dilakukan agar pelaksanaan reklamasi dapat berjalan secara optimal. Pada penelitian ini dilakukan kajian perencanaan reklamasi dan perhitungan biaya reklamasi pada bekas penambangan Pit C dengan luas total 131,67 Ha selama tahun 2023 hingga 2027. Perencanaan teknis meliputi kajian penata gunaan lahan, revegetasi, dan pemeliharaan. Perhitungan biaya reklamasi meliputi perhitungan biaya langsung dan biaya tidak langsung, biaya langsung mencakup biaya penata gunaan lahan, biaya revegetasi, dan biaya pemeliharaan sedangkan biaya tidak langsung meliputi biaya mobilisasi alat (2,5%), biaya perencanaan reklamasi (6,5-6,8%), dan biaya supervisi (4,3-4,9%). Berdasarkan perhitungan didapatkan biaya langsung rencana reklamasi untuk area bekas penambangan Pit C dari tahun 2023-2027 yaitu sebesar Rp 75.311.443.648 dengan biaya tidak langsung sebesar Rp 7.042.627.23","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128205908","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 J pada Tambang Batubara PT GHI di Kabupaten Tapin Provinsi Kalimantan Selatan","authors":"Ajeng Agustina Natahsia, Elfida Moralista, Zaenal","doi":"10.29313/bcsme.v3i2.8590","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.8590","url":null,"abstract":"Abstract. Conveyor is one of the means of transportation used in the mining industry, both to move excavated material processing and mining activities. The Conveyor structure is made of carbon steel material with strong structural characteristics and is susceptible to corrosion to oxidation due to environmental factors. With the occurrence of corrosion, it can cause damage and reduce the Remaining Service Life of the Conveyor structure. This study was conducted to determine Remaining Service Life, Corrosion Rate, type of corrosion and corrosion control on Conveyor structures. This study uses methodology measurement of thickness reduction of Conveyor structure. The actual thickness measurement on the Conveyor structure has a length of 94 meters divided into 3 segments with 25 test points above ground level. The tool used in measuring the thickness of the Conveyor structure is Ultrasonic Thickness Gauge TT 130.The type of corrosion that occurs in this Conveyor structure is evenly distributed corrosion. The method used for corrosion control is the Coating method with a three-layer system using Primer Coating Seaguard 5000, Intermediate Coating Sherglas FF and Top Coating Aliphatic Acrylic Modified Polyurethane. The value of Corrosion Rate that occurs in Conveyor structures ranges from 0.1814 – 0.3042 mm/year including the “good” category based on the relative corrosion resistance of steel. As for the design life of the Conveyor structure, which is 15 years and the remaining service life is 7 years, based on the calculation results obtained from the Remaining Service Life value it ranges from 6.71 – 9.65 years. Thus, 9 out of 25 test points or 36% were predicted to be unable to reach the predetermined design life of 15 years. \u0000Abstrak. Conveyor merupakan salah satu alat angkut yang digunakan dalam industri pertambangan, baik untuk memindahkan material pengolahan bahan galian maupun aktivitas penambangan. Struktur Conveyor terbuat dari material baja karbon dengan karakteristik struktur yang kuat serta rentan mengalami korosi terhadap oksidasi akibat dari faktor lingkungannya. Dengan terjadinya korosi maka dapat mengakibatkan kerusakan serta mengurangi Remaining Service Life pada struktur Conveyor. Penelitian ini dilakukan untuk mengetahui Remaining Service Life, Corrosion Rate, jenis korosi dan pengendalian korosi pada struktur Conveyor. Pada penelitian ini menggunakan metodologi pengukuran pengurangan ketebalan struktur Conveyor. Pengukuran tebal aktual pada struktur Conveyor memiliki panjang 94 meter yang dibagi menjadi 3 segmen dengan 25 test point yang berada di atas permukaan tanah. Alat yang digunakan dalam pengukuran ketebalan struktur Conveyor yaitu Ultrasonic Thickness Gauge TT 130. Jenis korosi yang terjadi pada struktur Conveyor ini ialah korosi merata. Metode yang digunakan untuk pengendalian korosi ialah metode Coating dengan sistem three layer menggunakan Primer Coating Seaguard 5000, Intermediate Coating Sherglas FF dan Top Coating Alip","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128980115","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 dan Estimasi Sumberdaya Nikel Laterit Berdasarkan Kandungan Ni dan Fe dengan Menggunakan Metode Kriging di PT Putra Perkasa Abadi, Kecamatan Langgikima, Kabupaten Konawe Utara, Provinsi Sulawesi Tenggara","authors":"Muhamad Rizaldi Fadlilah, Noor Fauzi Isniarno, Dono Guntoro","doi":"10.29313/bcsme.v3i2.8834","DOIUrl":"https://doi.org/10.29313/bcsme.v3i2.8834","url":null,"abstract":"Abstract. Nickel laterite is a metallic mineral resulting from the chemical weathering process of ultramafic rocks which results in residual and secondary enrichment of Ni, Fe, Mn, and Co elements (Syafrizal et al.,2011). With the cut-off grade Ni, modeling and estimation of resources is important to obtain a block model of Ni resources. The distribution of Ni levels is heterogeneous, so mining is carried out by selective mining referring to model blocks that have been mapped to meet the cut-off grade Ni. Based on this, it is possible for low and high Ni levels to be optimized, because if you only take Ni levels above 1.6%, Ni levels below the cut-off grade are not utilized. The resource estimation method used is kriging. Because kriging is the best linear unbiased estimator, many parameters are considered in kriging one of which is the variogram model. The variogram model is a geostatistical analysis by considering the location of the sample point, so that information on the relationship of one point with another point is expressed in the range/radius of information points that still have a spatial relationship. Based on statistical analysis, Block North and Block South data distribution are abnormal, with coefficient of variation values of 0.494 and 0.410. Resources that meet the cut-off grade Ni for blending needs are obtained low nickel, medium and high grade ore nickel. The total laterite nickel resources of the North Block amounted to 36,757 tons with an average Ni content of 1.64%, the total laterite nickel resources of the South Block amounted to 178,186 tons with an average Ni content of 1.62%. When viewed from the average rate per block, both blocks meet the cut-off grade Ni. \u0000Abstrak. Nikel laterit merupakan mineral logam hasil proses pelapukan kimia batuan ultramafik yang mengakibatkan pengkayaan unsur Ni, Fe, Mn, dan Co secara residual dan sekunder (Syafrizal et al., 2011). Dengan adanya cut-off grade Ni, maka pemodelan dan estimasi sumberdaya penting dilakukan untuk mendapatkan model blok sumberdaya Ni. Distribusi kadar Ni yang heterogen, maka penambangan dilakukan secara selective mining mengacu pada blok model yang sudah dipetakan untuk memenuhi cut-off grade Ni. Berdasarkan hal tersebut, memungkinkan adanya kadar Ni rendah dan tinggi yang harus di-optimalkan, karena jika hanya mengambil kadar Ni diatas 1.6%, kadar Ni di bawah cut-off grade tidak termanfaatkan. Metode estimasi sumberdaya yang digunakan adalah kriging. Pemilihan metode kriging dikarenakan kriging merupakan best linear unbiased estimator, banyak parameter yang diperhatikan dalam kriging salah satunya adalah model variogram. Model variogram merupakan analisis geostatistik dengan mempertimbangkan lokasi titik sampel, sehingga didapatkan informasi hubungan satu titik dengan titik yang lainnya dinyatakan dalam range/radius titik informasi yang masih memiliki hubungan secara spasial. Berdasarkan analisis statistik, Blok North dan Blok South distribusi datanya tidak norma","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128822418","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}