Bandung Conference Series: Mining Engineering最新文献

{"title":"Percobaan Pendahuluan Pengaruh Variasi Temperatur pada Proses Ekstraksi Lithium dengan Metode Adsorpsi dari Geothermal Brine PT Geo Dipa Energi Unit Dieng Menggunakan LiMn2O4","authors":"Muhammad Ikmal Hikmatullah, Linda Pulungan, Noor Fauzi Isniarno","doi":"10.29313/bcsme.v3i1.6049","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.6049","url":null,"abstract":"Abstract. The use of lithium for batteries in the world has increased recently, especially with the emergence of substitutes for fossil fuel based vehicles. The main source of lithium currently comes from brine salar mining which is mostly produced from Chile, Argentina to Australia. However, lithium production from mining is considered ineffective and has a negative impact on the environment. The discovered of other potential sources of lithium from brine geothermal, there are many studies on direct lithium extraction in order to shorten the production time. One method of direct lithium extraction is the adsorption method. Geothermal sources in Dieng area, Karang Tengah, Banjarnegara Regency, Central Java Province have lithium content in the range of 17-99 ppm (Suprapto, 2020). Therefore, a study was conducted on the direct extraction of lithium from brine taken from the Wellpad 30 of Geodipa Geothermal Plant Dieng unit with a concentration of 77.31 ppm. The study was carried out with variations in room temperature, 70°C and 95°C on brine using LiMn2O4  adsorbent, which aims to determine the optimal temperature for extraction and the location of brine taking when production is going to be seen from the temperature. From the results, it was found that the optimal temperature for extraction using the Adsorption method occurred in samples treated at room temperature (26°C). These results indicate an adsorption efficiency of 43.32% with a lithium uptake of 8.37 mg/g adsorbent. \u0000Abstrak. Penggunaan lithium untuk baterai di Dunia meningkat belakangan ini, terlebih dengan mulai bermunculannya pengganti kendaraan berbahan bakar fossil. Sumber utama lithium saat ini berasal dari pertambangan brine salar yang banyak dihasilkan dari negara Chile, Argentina hingga Australia. Namun produksi lithium dari penambangan tersebut dirasa kurang efektif dan berdampak negatif terhadap lingkungan. Dengan diketahuinya sumber potensial lithium lainnya yang berasal dari brine geothermal, banyak penelitian mengenai ekstraksi lithium secara langsung agar dapat mempersingkat waktu produksi. Salah satu metode ekstraksi lithium secara langsung adalah dengan metode adsorpsi. Sumber geothermal di daerah Dieng, Desa Karang Tengah, Kabupaten Banjarnegara, Provinsi Jawa Tengah memiliki  kandungan lithium direntang 17-99 ppm (Suprapto, 2020). Oleh karena itu dilakukan penelitian mengenai ekstraksi lithium secara langsung dari brine yang diambil pada Wellpad 30 PLTP Geodipa unit Dieng dengan kadar sebesar 77,31 ppm. Penelitian dilakukan dengan variasi suhu ruang, 70°C dan 95°C pada brine menggunakan adsorben LiMn2O4 yang bertujuan mengetahui suhu optimal untuk dilakukan ekstraksi dan lokasi pengambilan brine apabila akan dilakukan produksi dilihat dari suhunya. Dari hasil pengujian didapatkan suhu optimal untuk melakukan ekstraksi menggunakan metode Adsorpsi terjadi pada sampel dengan perlakuan suhu ruang (26°C). Hasil tersebut menunjukkan efisiensi adsorpsi sebesar 43,32% dengan li","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":"130779897","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 Kekar Terhadap Peak Particle Velocity dari Getaran Peledakan Tambang Batu Andesit PT Gunung Kulalet di Jawa Barat","authors":"Fadhil Saputra, Yuliadi, Zaenal","doi":"10.29313/bcsme.v3i1.5503","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5503","url":null,"abstract":"Abstract. PT Gunung Kulalet is company engaged in andesite mining. The companies use blasting as a development method. Ground vibration is a wave that moves in the ground caused by the presence of an energy source. This energy source can come from nature such as earthquakes or from blasting activities. The vibration level of blasting depends on the wave propagation speed to propagate through its respective medium. Waves cannot propagate optimally if there is interference in the medium. Disturbances in the medium one of them is the geological structure. The existence of geological structure makes wave propagation becomes not optimal so it is necessary to study the influence of structure on wave propagation. The research method used in this study is to perform a comparative analysis technique between scaled distance with peak particle velocity in rocks with high rock strength and rocks that have a structure. In addition, the study of the colleration between the joint direction and the direction of the measurement points. The results of the discussion will issue recommendations for optimal explosives so that the peak particle velocity value does not exceed the threshold value. The propagation of vibrations traversed in rocks has different characteristics. Wave propagation is influenced by several factors such as the joint direction against the direction of blasting measurements and also the resulting PPV value. Of the three waveforms, vertical waves have a greater influence compared to the other two waves. Determination of the effect of waves on the value of Peak Particle Velocity depends on the value of the decay constant (k) and site exponent (e) from the results showed that the condition of the general direction of the two directions of measurement in two companies have intersecting directions. Joint density conditions at Pt Gunung Kulalet have a tight space between joint distances (<60mm). From the results of the study found that the optimal explosive recommendation that can be used is 65.40 kg for PT Gunung Kulalet. \u0000Abstrak. PT Gunung Kulalet merupakan perusahaan yang bergerak di bidang pertambangan batu andesit. Perusahaan tersebut menggunakan peledakan sebagai media pemberaian batuannya. Getaran tanah (ground vibration) adalah gelombang yang bergerak di dalam tanah disebabkan oleh adanya sumber energi. Sumber energi ini dapat berasal dari alam seperti gempa bumi ataupun dari hasil kegiatan peledakan. Tingkat getaran peledakan bergantung pada cepat rambat gelombang untuk merambat melalui mediumnya masing – masing. Gelombang tidak dapat merambat secara optimal jika terdapat gangguan pada medium tersebut. Gangguan yang terdapat pada medium salah satunya adalah struktur geologi. Adanya struktur geologi membuat perambatan gelombang menjadi tidak optimal, sehingga diperlukan kajian mengenai pengaruh struktur terhadap perambatan gelombang. Metode penelitian yang digunakan pada penelitian ini yaitu melakukan teknik analisis komparatif antara scaled ","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"30 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":"122511985","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 Alat Gali-Muat dan Angkut pada Penambangan Batubara PT Pacific Global Utama di Kecamatan Tanjung Agung, Kabupaten Muara Enim, Provinsi Sumatra Selatan","authors":"Mohammad Rizkie Syahreza, Zaenal, Noor Fauzi Isniarno","doi":"10.29313/bcsme.v3i1.5423","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5423","url":null,"abstract":"Abstract. The condition of mining activities at PT Pacific Global Utama uses an open pit mining system with the type of Strip Mining. In carrying out this mining, of course, it will affect the results of the coal obtained which will later be used to achieve the production target of the company, recently the company has not reached its production target. Then for the purpose of knowing the production results of excavation and transportation activities whether the production target has been achieved or not, then the factors and constraints that exist in the company as well as ways of efforts to increase production results that have not been achieved. For digging, loading and transporting coal, several mechanical devices are used, including the Komatsu PC-400 LC-8 excavator as the digger and the Volvo A40F Articulated Dump Truck as the conveyance. To increase coal production, improvements were made when extracting excavated material which was originally carried out in the bottom loading area and then extracting excavated material in the top loading area so as to shorten loading time and increase the amount of cargo on the conveyance. The results obtained are in the production of loading and unloading equipment. which initially only got production of 49,000 tons/month with the company's desired target of 55,000 tons/month, this target was not achieved. where a study was carried out by maximizing the process of loading and adding to the load of minerals to be able to increase production by achieving a target of 55,000 tons/month, so that the production of digging and loading equipment became 57,924 tons/month and 57,911 tons/month, the suitability factor obtained after improvements were 0.92 and production was achieved after improvement. \u0000Abstrak. Kondisi Kegiatan penambangan pada PT Pasific Global Utama menggunakan sistem tambang terbuka dengan tipe Strip Mining.Dalam pelaksanaan penambangan ini tentu akan mempengaruhi hasil dari batubara yang didapatkan, yang nantinya untuk pencpaian target produksi dari perusahaan, akhir – akhir ini perusahaan tidak mencapai target produksi.Kemudian untuk tujuan yaitu untuk mengetahui hasil produksi kegiatan gali muat angkut ini apakah sudah mencapai target produksi atau belum lalu faktor serta hambatan yang ada pada perusahaan dan cara upaya untuk perbaikan hasil produksi yang tidak tercapai. Untuk penggalian, pemuatan dan pengangkutan batubara menggunakan beberapa alat mekanis, diantaranya menggunakan excavator Komatsu PC-400 LC-8 sebagai alat gali-muatnya dan dump truck Volvo Articulated Dump Truck A40F sebagai alat angkutnya. Untuk meningkatkan produksi batubara dilakukan perbaikan pada saat pengambilan bahan galian yang semula dilakukan pada daerah bottom loading kemudian dilakukannya pengambilan bahan galian di daerah top loading sehingga dapat mereduksi waktu pemuatan dan dengan penambahan jumlah muatan pada alat angkut.Hasil yang di dapat pada produksi alat gali muat yang semula hanya mendapatkan hasil prod","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121878798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monitoring Korosi Discharge Conveyor F pada Tambang Batubara PT XYZ di Kabupaten Bungo, Provinsi Jambi","authors":"R. Fauzi, Elfida Moralista, Zaenal","doi":"10.29313/bcsme.v3i1.5414","DOIUrl":"https://doi.org/10.29313/bcsme.v3i1.5414","url":null,"abstract":"Abstract. The need for coal is increasing every year to make it easier to transport it using a mechanical device in the form of a conveyor that can increase work efficiency in coal mines. Conveyor structures made of carbon steel material are prone to corrosion due to the influence of the surrounding environment, so they can be damaged and reduce the remaining life of the conveyor structure. The research methodology used was measuring the decrease in the thickness of the conveyor structure which was applied using the Smart Sensor Ultrasonic Thickness Gauge TT 130. Measurements were made on a 125 meter long conveyor structure and 32 test points. The environmental conditions of the study area are based on statistics for 2016–2020 with an average rainfall of 200.48 mm/year, an average air temperature of 25.37ºC and a relative humidity of 87.46%. The type of corrosion that occurs in the conveyor structure is uniform corrosion. The corrosion control method applied is the 3 layer system coating method, which uses a primary coating Seaguard 5000, intermediate coating uses Sherglass FF and top coating uses Aliphatic Acrylic Modifield Polyurethane. The corrosion rate ranges from 0.1827–0.3267 mm/year which is included in the good category based on the relative corrosion resistance table of steel. The design life of the conveyor structure is 15 years and the service life is 7.5 years, while the remaining service life from the calculation results ranges from 6.53–8.79 years. because of that there are 5 test points or 15,6% predicted not to reach the design life of 15 years. \u0000Abstrak. Kebutuhan batubara setiap tahun semakin meningkat untuk mempermudah setiap pengangkutannya menggunakan alat mekanis berupa conveyor yang dapat meningkatkan efesiensi kerja pada tambang batubara. Struktur conveyor yang terbuat dari material baja karbon rentan mengalami korosi akibat dari pengaruh lingkungan sekitarnya, sehingga dapat mengalami kerusakan dan mengurangi remaining service life struktur conveyor. Metodologi penelitian yang digunakan adalah pengukuran pengurangan ketebalan struktur conveyor yang diaplikasikan menggunakan alat Smart Sensor Ultrasonic Thickness Gauge TT 130. Pengukuran dilakukan pada struktur conveyor sepanjang 125 meter dan 32 test point. Kondisi lingkungan daerah penelitian berdasarkan statistik tahun 2016–2020 dengan curah hujan rata-rata sebesar 200,48 mm/tahun, temperatur udara rata-rata sebesar 25,37ºC dan kelembapan relatif 87,46%. Jenis korosi yang terjadi pada struktur conveyor adalah jenis korosi merata. Metode pengendalian korosi yang diaplikasikan yaitu metode coating sistem 3 layer, dimana menggunakan primer coating  Seaguard 5000, intermediate coating menggunakan Sherglass FF dan top coating menggunakan Aliphatic Acrylic Modifield Polyurethane. Corrosien rate berkisar 0,1827–0,3267 mm/tahun yang termasuk kedalam kategori good berdasarkan tabel ketahanan korosi relatif baja. Umur desain struktur conveyor 15 tahun dan umur pakai 7,5 tahun, s","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"15 5-6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114012219","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":"Optimalisasi Material Strength Properties Timbunan untuk Kestabilan Lereng Timbunan PT Putra Perkasa Abadi, Site Job PT Makmur Lestari Primatama, Kecamatan Langgikima, Kabupaten Konawe Utara, Provinsi Sulawesi Tenggara","authors":"Maya Almaniar Zulhi Wibiyana, Yuliadi, Elfida Moralista","doi":"10.29313/bcsme.v2i2.4495","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.4495","url":null,"abstract":"Abstract. The mining system has the potential for mining water problems that have an impact on the entry of water into the mine openings, thus affecting working conditions with a decrease in rock strength resulting in instability. The mining water problem occurred at PT PPA Site Job PT MLP disposal area and pit. This research was conducted to determine the value of the actual rock strength (strength material), runoff water management in the form of determining the dimensions of the drains, sump dimensions, the number and specifications of the pump to be used, and the value of the safety factor (FK) on the slopes. The research method used is the geotechnical analysis of slope stability with the Finite Element Method and the Limit Equilibrium Method and is simulated with Phase2 and Slide software. The study was conducted in the disposal area divided into 5 sections (A-E). The input material parameters used are the internal shear angle (Ø), cohesion (c) and the density of the embankment material (ɤ) which are obtained based on the results of testing the physical and mechanical properties of the bulk and core samples. Runoff water management is carried out by hydrological analysis using the Gumbel distribution method and the Mononobe equation, while the planning of the dimensions of the water channel uses the Manning formula and the sump dimension by trial and error based on the amount of water discharge entering the pit. The test results show the lowest cohesion (c) value is 0.22 kg/m2 and the lowest internal shear angle (Ø) is 15.30º. Hydrological analysis for recommendations for the dimensions of waterways in the management of runoff water outside the pit, namely the width of the base (B) 0.4 meters; optimal water height (h) 0.21 meters; channel height (H) 0.45 meters and top length (L) 0.90 meters. The dimensions of the sump in the management of runoff and groundwater in the pit are 26 meters long, 19 meters wide and 6 meters high with a volume capacity of 2,964 m3, and the pump used is Multiflo® RF-420EXHV which has specifications with a maximum rotation speed of 1700 rpm, head 250 meters and pumping capability of 450 l/s. Geotechnical analysis in the disposal area shows that section A of the slopes (a) and E and in the area of the pit section Y there is no need for slope geometry recommendations based on KEPMEN 1827K/MEM/30/2018 with a safety factor value (FK) 1,3. \u0000Abstrak. Sistem penambangan memiliki potensi permasalahan air tambang yang berdampak dengan masuknya air kedalam bukaan tambang sehingga mempengaruhi kondisi kerja dengan penurunan kekuatan batuan yang mengakibatkan ketidakstabilan. Permasalahan air tambang tersebut terjadi pada PT PPA Site Job PT MLP area disposal dan pit. Penelitian ini dilakukan untuk mengetahui nilai kekuatan batuan (strength material), pengelolaan air limpasan berupa penentuan dimensi saluran air, dimensi sump, jumlah dan spesifikasi pompa yang akan digunakan, serta nilai faktor keamanan (FK) pada lereng. Metod","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116111812","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":"Karakteristik Sifat Fisik dan Mekanik Batuan Basalt sebagai Bahan Baku Serat Basalt di Wilayah Bandung Raya, Provinsi Jawa Barat","authors":"Noufal Abhinaya, Yuliadi, Zaenal","doi":"10.29313/bcsme.v2i2.4192","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.4192","url":null,"abstract":"Abstract. West Java there is a lot of wealth of mining materials as a result of volcanic activities including andesite and basalt. Mining materials are generally conventionally used only for building materials (construction) in the field of Civil Engineering which is still in the form of 'raw materials' or 'semi-finished'. The management of this mining material is carried out with simple and the selling value is low.In the century of advanced technology today began to be widely used construction materials in the form of composites with fiber reinforcement (Fibre Reinforced Composite), including composites with the strengthening of basalt fibers (Fibre Basalt Reinforced Composite). Basalt fibers have attracted a lot of attention in the composite industry because they are chemically stable and have excellent mechanical and thermal properties. Due to its high commercial value, basalt fiber has many applications in the polymer and construction industries.In this case, the question is whether there isa great potential,is it possible that basalt around Bandung Raya can be used as basalt fiber so that it can provide added value? Whether the quality (chemical/mineral arrangement) and characteristics are in accordance with the physical and mechanical properties required to be used as basalt fibers.In the research will be determined characteristics, quality (chemical / mineral arrangement) in several research locations that have the potential of basalt rock deposits, namely around Bandung and Cimahi, Cianjur, Cikarang and Serang. In testing the physical-mechanical properties of the three regional representatives from the three research areas included in the test parameters, namely samples BT 01 and GB 02. \u0000Abstrak. Jawa Barat terdapat banyak kekayaan bahan tambang sebagai hasil kegiatan gunung api di antaranya adalah batuan beku andesit dan basalt. Bahan tambang itu pada umumnya secara konvensional digunakan hanya untuk bahan bangunan (konstruksi) di bidang teknik sipil yang masih dalam bentuk „bahan mentah‟ atau „setengah jadi‟. Pengelolaan bahan tambang ini dilakukan dengan relatif sederhana dan nilai jualnya yang relatif rendah.Pada abad teknologi maju sekarang ini mulai banyak digunakan bahan konstruksi yang berbentuk komposit dengan penguatan serat (fibre reinforced composite), diantaranya adalah komposit dengan penguatan serat basalt (fibre basalt reinforced composite). Serat basalt telah menarik banyak perhatian dalam industri komposit karena secara kimiawi stabil dan memiliki sifat mekanik dan termal yang sangat baik. Karena nilai komersialnya yang tinggi, serat basalt memiliki banyak aplikasi dalam industri polimer dan konstruksi. Dalam hal ini yang menjadi pertanyaan apakah dengan potensi yang besar, mungkinkah basalt di sekitar Wilayah Bandung Raya ini bisa dijadikan serat basalt sehingga dapat memberikan nilai tambah? Apakah kualitas (susunan kimia/mineral) dan karakteristik sesuai dengan sifat-sifat fisik dan mekanik yang dipersyaratkan untuk ","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125998905","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 Geometri Jalan Tambang untuk Mengurangi Dampak Slippery sebagai Upaya Meningkatkan Produksi Nikel PT ANTAM (Persero) Tbk di Kecamatan Maba, Kabupaten Halmahera Timur, Provinsi Maluku Utara","authors":"Sandy Herdiansyah, Zaenal, Iswandaru","doi":"10.29313/bcsme.v2i2.4018","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.4018","url":null,"abstract":"Abstract. PT Aneka Tambang Tbk nickel production located in Wayafli Village, Maba District, East Halmahera Regency, North Maluku Province, to support the mining process, the Tanjung Buli site uses a conveyance with the type of Articulated Dump Truck CAT 745 and Volvo FMX 440 8X4 with a Volvo EC480EL loading and unloading tool, one of the obstacles at the Tanjung Buli site is the geometry of the road and the duration of slippery This research aims to be able to find out the condition of the transport road and activities slippery handling, Based on research, the condition of the road geometry which includes the actual road width condition of the straight condition has the smallest width of 5,944 - 20,329 meters with the condition of the bend road has a size of 6.201- 30.714 meters, with the highest grade being 19% for the actual superelevation of a maximum of 7.2%, the standard grade used is 12% and after calculations, the minimum superelevation value is 6% Based on the productivity of the support tool for support tools for support tools The CAT D6RXL bulldozer is 147.40 m3/h and the Komatsu D85ESS-2A is 189.27 m3/h. The total slippery handling duration in the pre-production area of 72.51 minutes can be reduced by repairing the transport road, especially in the crossfall section to be able to drain rainwater so that there is no inundation, it can reduce the duration of 44.61 minutes, then by adding a bulldozer unit the duration can be reduced to 29.74 minutes and changing the pushing method to side by side dozing to 29.45 minutes. \u0000Abstrak. PT Aneka Tambang Tbk produksi nikel yang terletak di Desa Wayafli Kecamatan Maba Kabupaten Halmahera Timur Provinsi Maluku Utara, untuk menunjang proses penambangan, site Tanjung Buli menggunakan alat angkut dengan jenis Articulated Dump Truck CAT 745 dan Volvo FMX 440 8X4 dengan alat gali muat Volvo EC480EL salah satu hambatan yang ada pada site Tanjung Buli adalah geometri jalan serta durasi slippery Penelitian ini memiliki tujuan untuk dapat mengetahui kondisi jalan angkut dan kegiatan penanganan slippery, Berdasarkan penelitian, kondisi dari geometri jalan yang termasuk kondisi lebar jalan aktual kondisi lurus memiliki lebar terkecil 5,944 - 20,329 meter dengan kondisi jalan tikungan memiliki ukuran 6,201- 30,714 meter, dengan grade tertinggi adalah 19% untuk superelevasi actual maksimal 7,2%, standart grade yang digunakan adalah 12% dan setelah dilakukan perhitungan, nilai superelevasi minimum adalah 6% Berdasarkan produktivitas dari alat support untuk alat support Bulldozer CAT D6RXL sebesar 147,40 m3/jam dan Komatsu D85ESS-2A sebesar 189,27 m3/jam. Durasi penanganan slippery total pada areal pra-produksi sebesar 72,51 menit dapat dikurangi dengan cara memperbaiki jalan angkut terutama pada bagian crossfall untuk dapat mengalirkan air hujan agar tidak terjadi genangan dapat mengurangi durasi 44,61 menit, lalu dengan menambah unit bulldozer durasi dapat berkurang menjadi 29,74 menit dan mengganti metode pen","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130328796","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":"Penggunaan Karbon Aktif di Settling Pond Pengolahan Bijih Emas di Desa Kutawaringin, Kecamatan Kutawaringin, Kabupaten Bandung, Provinsi Jawa Barat","authors":"Gita Ashari Pratama, Linda Pulungan, Solihin","doi":"10.29313/bcsme.v2i2.3944","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.3944","url":null,"abstract":"Abstract. Gold mining activities in Kutawaringin District, Bandung Regency are one example of the use of amalgamation methods in gold processing. Previous reports stated that the mercury content in the lower reaches of the Ciherang River was 0.2 mg/L [10]. Previous research stated that activated carbon can absorb up to 99%. This research is focused on settling pond to reduce mercury levels in gold processing waste when it will be flowed into the river. Initial sample testing showed that mercury content was 0.07984 mg/L, above the water quality standard threshold of 0.005 mg/L, TDS was 443 mg/L and pH was 7.86. The research was conducted using activated carbon weight test variables 2, 3, 4, 5, 6, 7 grams with contact times of 3, 4, 5, 6, 7, 8, and 9 hours for 1 liter gold processing waste samples. The test results showed the highest decrease in mercury levels in the variable weight of activated carbon 6 grams with a contact time of 8 hours of 0.00337 mg/L. The use of activated carbon in the settling pond by adjusting the volume of the settling pond at the research location was 0.891 m3 with a variable weight of 5.3 kg and a contact time of 8 hours to obtain a result of 0.000433 mg/L with a percentage decrease of 99.46%. \u0000Abstrak. Kegiatan penambangan emas di Kecamatan Kutawaringin, Kabupaten Bandung merupakan salah satu contoh penggunaan metode amalgamasi dalam pengolahan emas. Laporan terdahulu menyebutkan kandungan merkuri di hilir Sungai Ciherang sebesar 0,2 mg/L [10]. Penelitian sebelumnya menyebutkan bahwa karbon aktif dapat menyerap hingga 99%. Penelitian ini difokuskan pada settling pond untuk mengurangi kadar merkuri pada limbah hasil pengolahan emas ketika akan dialirkan ke sungai. Pengujian sampel awal didapatkan hasil kandungan logam merkuri sebesar 0,07984 mg/L, di atas nilai ambang batas baku mutu air yakni sebesar 0,005 mg/L, TDS sebesar 443 mg/L dan pH sebesar 7,86. Penelitian dilakukan menggunakan variabel uji berat karbon aktif 2, 3, 4, 5, 6, 7 gram dengan waktu kontak yakni 3, 4, 5, 6, 7, 8, dan 9 jam untuk sampel limbah pengolahan emas sebanyak 1 Liter. Hasil pengujian menunjukkan penurunan kadar merkuri tertinggi pada variabel berat karbon aktif 6 gram dengan waktu kontak 8 jam sebesar 0,00337 mg/L. Penggunaan karbon aktif pada settling pond dengan menyesuaikan volume settling pond lokasi penelitian sebesar 0,891 m3 dengan variabel berat 5,3 kg dan waktu kontak 8 jam mendapatkan hasil sebesar 0,000433 mg/L dengan persentase penurunan sebesar 99,46 %.","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129972450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Remaining Service Life Struktur Conveyor B pada Tambang Batubara PT XYZ di Kabupaten Tanah Laut, Provinsi Kalimantan Selatan","authors":"Vaisal Gilang Adrian, Elfida Moralista, N. F. Isniarno","doi":"10.29313/bcsme.v2i2.4261","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.4261","url":null,"abstract":"Abstract. Material transportation activities in the mining industry require a tool that can move materials effectively, such as conveyor which made from carbon steel that are susceptible to oxidation due to environmental effect. The structure that made from carbon steel will occur the corrosion and the damage which will reduce the remaining useful life of the tools. The research was conducted with the aim of knowing the type of corrosion, corrosion control, and the remaining service life of the conveyor structure. The research methodology uses the method of reducing the thickness of the conveyor structure which is carried out with the help of the Ultrasonic Thickness Gauge TT 130. The research was conducted on a conveyor structure with a length of 90 meters which is divided into 3 segments with 25 test points. Corrosion that occurs in the conveyor structure is included in the type of prevalent corrosion. Corrosion control is carried out by the coating method where the primary coating is 5000 seaguard, the intermediate coating is with sherglass FF, and the top coating is with aliphatic acrylic modified polyurethane. The corrosion rate that occurs is in the range of 0.1650 mm/year – 0.3100 mm/year, based on the parameters of the relative corrosion resistance of steel, it is included in the good category. The remaining service life of the conveyor structure ranges from 5.96 years – 10.91 years, there are 8 test points or about 32% test points which are predicted to not reach the design life of 15 years. \u0000Abstrak. Kegiatan transportasi material dalam industri pertambangan menggunakan alat conveyor. Struktur conveyor berbahan dasar logam mengalami korosi akibat pengaruh lingkungan serta kerusakan yang akan menyebabkan sisa umur pakai menjadi rendah. Penelitian dilakukan dengan tujuan untuk mengetahui jenis korosi, metode pengendalian korosi, dan sisa umur pakai dari struktur conveyor. Metodologi penelitian menggunakan metode pengurangan ketebalan struktur conveyor yang dilakukan dengan bantuan alat Ultrasonic Thickness Gauge TT 130 untuk mengukur tebal aktualnya. Penelitian dilakukan pada struktur conveyor dengan panjang 90 meter yang terbagi kedalam 3 segmen dengan 25 test point.  Korosi yang terjadi pada struktur conveyor termasuk kedalam jenis korosi merata. Pengendalian korosi dilakukan dengan metode coating sistem 3 layer dimana primer coating menggunakan seaguard 5000, intermediate coating menggunakan sherglass FF, dan top coating menggunakan aliphatic acrylic modified polyurethane. Laju korosi yang terjadi berkisar antara 0,1650 mm/tahun – 0,3100 mm/tahun, berdasarkan parameter ketahanan korosi relatif baja maka termasuk ke dalam kategori baik (good). Umur pakai struktur conveyor adalah 8 tahun, dimana sisa umur pakai struktur conveyor berkisar antara 5,96 tahun – 10,91 tahun, sehingga terdapat 8 test point atau sekitar 32% test point yang diprediksi tidak dapat mencapai umur desainnya yaitu 15 tahun.","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128332908","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 Alat Angkut Kegiatan Pengupasan Overburden Penambangan Batubara PT Tata Bara Utama di Kabupaten Bayung Lencir, Provinsi Sumatera Selatan","authors":"Nabil Zulfa Maulana, Zaenal, I. Wijaksana","doi":"10.29313/bcsme.v2i2.4372","DOIUrl":"https://doi.org/10.29313/bcsme.v2i2.4372","url":null,"abstract":"Abstract. PT Tata Bara Utama is a contractor from PT Manggala Alam Lestari which is saved to overcome Over Burden (OB) with a target of reaching 288,200 BCM in one month. The company's production target was not achieved due to unfavorable road geometry conditions. This is because there are several mine road geometries that do not meet the standards of Ministerial Decree 1827 k/30/m/2018, thus hampering the production of conveyances. The conveyance used is the 745 articular dump truck. The conveyance operates from the front of the work to the disposal with a distance of 2700 m. Productivity of hauling equipment is strongly influenced by the geometry of the mine road, so that the 13 segments of the mine road geometry do not meet the standards of Kepmen 1827 and must be repaired immediately. In the results of the study, there were several segments of the mining road that were not in accordance with these standards. There are 3 segments on the straight road and 5 segments on the bend road that do not meet the standards in the geometry of the mining road, but the grade (slope of the road) has met the standards of Kepmen 1827, and there are still some segments of the embankment that do not meet these standards. This means that the productivity produced in each unit of conveyance is 49.67 BCM/hour so that the production of PT Tata Bara Utama reaches 196,700 BCM/Month while the production target is 288,200 BCM, so the production target is not achieved. Therefore, it is necessary to do reconstruction so that the desired production target of the company will be achieved. This means that the greater the cycle time value on the conveyance, the lower the productivity so that production is not reached. \u0000Abstrak. PT Tata Bara Utama merupakan perusahaan kontraktor dari PT Manggala Alam Lestari yang bertugas untuk mengupas Over Burden (OB) dengan target mencapai 288.200 BCM dalam satu bulan. Target produksi perusahaan tidak tercapai dikarenakan kondisi geometri jalan yang tidak mendukung. Hal ini terdapat beberapa geometri jalan tambang belum memenuhi standar Kepmen 1827 k/30/m/2018 sehingga menghambat kerja produksi alat angkut. Alat angkut yang digunakan yaitu articular dump truck 745. Alat angkut beroperasi dari front kerja menuju disposal dengan jarak 2700 m. Produktivitas alat angkut sangat dipengaruhi oleh geometri jalan tambang, sehingga dari 13 segmen geometri jalan tambang belum memenuhi standar Kepmen 1827 dan harus segera diperbaiki. Pada hasil penelitian terdapat beberapa segmen jalan tambang yang belum sesuai dengan standar tersebut. Ada 3 segmen pada jalan lurus dan ada 5 segmen pada jalan belokan yang belum memenuhi standar pada geometri jalan tambang, akan tetapi grade (kemiringan jalan) telah memenuhi standar Kepmen 1827, dan tanggul masih ada beberapa segmen yang belum memenuhi standar tersebut. Hal ini produktivitas yang dihasilkan pada tiap unit alat angkut sebesar 49,67 BCM/jam sehingga produksi PT Tata Bara Utama mencapai 196,700 BCM/Bulan s","PeriodicalId":187584,"journal":{"name":"Bandung Conference Series: Mining Engineering","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123984511","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}