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Journals Mining Engineering : Bina Tambang

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Published by Universitas Negeri Padang

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Earth & Planetary Sciences

Atas dukungan dari jurusan Teknik Pertambangan dengan Penanggung Jawab Dekan Fakultas Teknik UNP (Drs. Ganefri,MPd, P.hd) bekerjasama dengan Ketua Jurusan Teknik Pertambangan (Drs.Bambang Heriyadi,MT) dan seluruh Dosen Jurusan Teknik Pertambangan Fakultas Teknik Universitas Negeri Padang. Jurnal ini terbentuk dan didukung penuh untuk sarana kretifitas Dosen dan Mahasiswa Teknik Pertambangan.

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ANALISIS PENGARUH PERUBAHAN NILAI HARGA ACUAN BATUBARA TERHADAP KELAYAKAN PENAMBANGAN TAMBANG BAWAH TANAH OMBILIN 1 (SAWAHLUWUNG) PT. BUKIT ASAM – UPO Yolanda Noverista; Murad Murad; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 2, No 1 (2015): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

PT. Bukit Asam - UPO is an underground coal mining company conducted in the area Ombilin I (Sawahluwung), Ombilin II (Waringin-Sugar) and Ombilin III (Sigalut). Excess coal production compared to the low demand becomes a significant factor for the price of coal fell for the last few years. So far, the Government has issued a monthly coal reference price (HBA and HPB) since January 2009 for use by manufacturers of coal to all the places and contact services. But the official implementation HBA started since September 2011. In addition, the reference price of coal to be used by holders of Production Operation IUP, IUP specialized production operations as well as CCoWs as a reference in determining the selling price of coal for a given period. Therefore, it needs to be calculated budget plans annual production of coal mining PT. Bukit Asam UPO so that it can be seen in corporate profits and the value of the minimum reference price of coal mining in order to still meet the minimum profit required.The method used in this research is quantitative research methods. Where do the initial learning of what will be done and the collection of data necessary for the manufacture of paper so that when the data processing that starts from the calculation of the budget plan, coal reference price comparison with the price of the exchange and analysis of the effects of changes in the reference price of coal. Can be concluded from these data.From research conducted then obtained Budget Plan (RAB) for one year PT. Bukit Asam UPO is Rp. 44.638.890.400.00. Minimum benchmark coal prices obtained in December 2014 at 64,65, it shows the value of the company's profit decreases with the increase in the exchange rate increasingly rises. Minimal HBA preferably above 45.65 with the exchange rate of Rp. 12.000 / $, because if theHBA under 45,65 would suffer losses.

Analisis Manajemen Fleet Pada Kegiatan Produksi Batu Andesit Dalam Penerapan Metode Antrian di PT Koto Alam Sejahtera, Kabupaten Lima Puluh Kota Yuliana Safitri; Murad Murad
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. PT Koto Alam Sejahtera is a private company engaged in the mining business, especially the Andesite stone. In the process of transporting andesite stones to the crusher, there is a dump truck queue and a long stand-by time on the dump truck, this can cause the productivity of the tool to be small so that the andesite stones production target of 30.000 ton/month is not achieved. This is due to the inefficient working time of mechanical devices. This production target was not achieved due to improper combination of tools, road width and road grade that did not meet the standards, causing queues or waiting times for transport on the front loading and at some road points. One way to achieve the production target is needed fleet management accordingly. Based on the results of the study, it can be concluded that the productivity of excavator Hitachi ZX-350 is 232,61 ton/hour and the productivity of dump truck Mitsubishi Fuso 220 PS is 47,30 ton/hour. The composition of the available equipment is 1 unit of excavator serving 5 units of dump trucks. Efforts to reduce the queuing time are to make improvements to the composition of the equitment MF=1. Fleet settings are based on method Antrian, that is 1 unit of loading equipment serves 4 units of transport equipment with a production of 38.485 ton/month.Keywords: Fleet Management, Method Queue, Match Factor, Production, Productivity, Dump Truck

Upaya Meminimalisir Kecelakaan Kerja Di Area Penambangan PT. Prima Sarana Gemilang Jobsite Muara Alam Sejahtera, Kabupaten Lahat, Provinsi Sumatera Selatan Tomy Efraim Situmorang; Rijal Abdullah
Journals Mining Engineering : Bina Tambang Vol 4, No 3 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v4i3.105468

Abstract. Unsafe conditions and unsafe actions at PT. Prima Sarana Gemilang are the main causes of accidents that cause loss and loss to humans and companies, damage to equipment, disrupt production and others. Based on the results of the study, it is known that work locations with high potential hazard at PT. Prima Sarana Gemilang Jobsite Muara Alam Sejahtera is a Loading Point with 4 accidents in that area, based on the results of the study, it was found that 54 respondents answered that physical hazards, ergonomic hazards and psychological hazards (100%) were found in the mining area, based on the research conducted, it is known that, of the 54 respondents who explained bad knowledge, 33 respondents (61.1%), based on the results of the study it was found that 54 respondents answered the control hierarchy with PPE was the most done, based on the results of a study of 54 respondents who answered the effort to minimize workplace accidents by management, the most widely done was that workers were given directions on how to properly use PPE and maintain PPE so that it was always in good condition. Keywords: Hazard Potential, Hazard Control Hierarchy, Work Accident Management, Safety, JSA and JHA.

UPGRADING COAL LOW QUALITY WITH DRYING PROCESS WITHOUT OXYGEN Joni Pradinata; Rijal Abdullah; Ansosry Ansosry
Journals Mining Engineering : Bina Tambang Vol 3, No 1 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

kcal/kg that accumulate in stockpile PT. Nusa Alam Lestari. The authorconducted a preliminary survey to determine the amount of low quality coal inPT. Nusa Alam Lestari. In February 2017 the number of coal with a calorie valuebelow 5100 kcal /kg - 5500 kcal / kg on the stockpile of seam stack at 10422 tonsof stockpile.Here are several kinds of coal upgrading process, one of them is dryingprocess. Coal Drying aims to remove or decrease the water content contained incoal, so that with reduced moisture content is able to increase the calorific valueof coal.In the process of upgrading with the drying process (Coal Drying)obtained coal calorific value by using Furnance Carbolite to influencetemperature and reaction time that is at 400⁰C for 1 hour produce coal withcalories 5,697,94 kkal / kg. At 400⁰C for 2 hours produces coal with a calorificvalue of 5,987.8 kcal kg. At 400⁰C for 3 hours produces coal with a calorificvalue of 6,182.70 kcal/kg. At 500⁰C for 1 hour produce coal with a calorific valueof 6,192.44 kcal/kg. At a temperature of 500⁰C for 2 hours yields a coal calorificvalue of 6,233.86 kcal / kg. At a temperature of 500⁰ for 3 hours yields a calorificvalue of 6,219.24 kcal / kg. At 600⁰C for 1 hour yields a calorific value of6,423.15 kcal/ kg. At 600⁰C for 2 hours 6,470.15 kcal/kg. At 600⁰C for 3 hoursyields a caloric value of 6,375.14 kcal/kg.In this research, the optimum caloric value obtained at drying process is600⁰C for 2 hours with decreasing water content 3,95%. In the drying process tothe effect of temperature and calorie reaction time rose from 5,457.99 kcal/kg to6,470.15 kcal/kg.

Evaluasi Rancangan Geometri Peledakan Berdasarkan Hasil Fragmentasi Batuan dan Getaran Tanah Pada PT. Koto Alam Sejahtera Kabupaten Lima Puluh Kota Provinsi Sumatera Barat. Muhammad Ilham Cahyadi; Raimon Kopa
Journals Mining Engineering : Bina Tambang Vol 4, No 1 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstarct. Administratively, the mining location of PT. Koto Alam Sejahtera is located in Jorong Polong Duo, Nagari Koto Alam, Pangkalan Koto Baru, Lima Puluh Kota District, West Sumatra Province.Explosive hole drilling activities at PT. Koto Alam Sejahtera uses the Furukawa Rock Drill PCR200 engine and the explosives used are Pindad ANFO (PANFO).Based on the distribution analysis of rock fragmentation results from actual blasting geometry data, the average rock fragmentation results from blasting (for 4 blasting times) that passed at 60 cm in size with desktop split software was 76,88%.Based on the calculation of ground vibration from the actual data of blasting geometry using the Du Pont / USBM predictor method, the PPV values exceeding 5 mm / s occurred on February 17 and 22 2018, with a PPV value of 6,31 mm / s and 5,76 mm / s.Based on the results of split desktop software analysis, the results of rock fragmentation in the proposed design blasting geometry is 86,22%.Based on the results of the calculation of ground vibration of the Du Pont / USBM predictor method, the value of PPV in the proposed design of II blasting geometry was 4,80 mm / s.Keywords: ANFO, Blasting Geometry, Ground Vibration, Kuz Ram, Rock Fragmentation, USBM Predictor.

RANCANGAN DAN ANALISIS BIAYA SISTEM PENYALIRAN TAMBANG PIT TIMUR PT. ARTAMULIA TATAPRATAMA, KABUPATEN MUARO BUNGO, PROVINSI JAMBI Rizkien Putra; Tamrin Kasim; Ansosry Ansosry
Journals Mining Engineering : Bina Tambang Vol 3, No 2 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Rancangan sistem penyaliran di PT. Artamulia Tatapratama belum optimaluntuk menangani air yang masuk ke pit tambang baik air limpasan maupun airtanah. Catchment Area pada daerah penelitian dibagi menjadi 4 bagian, luasnyasecara berurutan adalah 43,33 Ha, 63,01 Ha, 60,26 Ha dan 20,2 Ha. Debit air totalmasing-masing catchment area secara berurutan adalah 1,456 m3/detik, 2,492m3/detik, 2,133 m3/detik dan 1,532 m3/detik. Volume tampungan optimal mainsump, temporary sump central, serta temporary sump timur secara berurutan adalah90.317,5 m3, 23.285,5 m3, 96.785,5 m3serta. Saluran terbuka yang direncanakanyaitu pada catchment area I, dimana saluran terbuka bertujuan untuk mencegah airmasuk ke front penambangan. Pompa yang digunakan adalah pompa Multiflo MF-420E 2 buah pada main sump dan CF-48H masing-masing 1 buah pada temporarysump timur dan temporary sump central. Besar debit pompa yang harus ditampungsettling pond adalah sebesar 0,594 m3/detik, jadi volume settling pond yangdirencanakan adalah 21.264 m3. Biaya yang dikeluarkan untuk operasi pompaadalah sebesar Rp 3.187.000/jam. Sedangkan biaya yang dikeluarkan untukpembuatan sump keseluruhan adalah sebesar Rp 1.488.793.210,7. Biaya pembuatansaluran terbuka sebesar Rp 61.494.110,51 dan pembuatan settling pond adalah Rp101.435.538,4.Kata kunci : Sistem penyaliran, tambang terbuka, curah hujan, catchment area, sump, saluran terbuka, settling pond, pompa,

Optimalisasi Alat Gali-Muat Dan Alat Angkut Terhadap Produksi Overburden Dengan Metode Kapasitas Produksi Dan Metode Antrian Di Pit Timur Periode Agustus 2017 PT. Artamulia Tata Pratama, Site Tanjung Belit, Bungo, Jambi Yuli Asri; Mulya Gusman
Journals Mining Engineering : Bina Tambang Vol 4, No 1 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. In the mining process, the availability of dump truck equipment and loading equipment will determine the sustainability of production which has an impact on productivity and efficiency. The purpose of this study is to optimize production on stripping the overburden using the queuing method, match factor. The location of the study was conducted at PT. Artamulia Tata Pratama, Tanjung Belit, site Bungo, Jambi in August 2017 – September 2017. The loading equipment used is the PC 1250 Komatsu Excavator and the Komatsu HD 465-7 dump truck. The simulation results of the number of dump trucks needed based on production capacity is 17 units while based on queuing theory there are 17 units. Where the actual dump trucks used were 19 unitsKeywords: Production, queue, match factor, optimization of production, coal mining.

Analisis Hidrogeologi untuk Rencana Sistem Penyaliran di Pit S22GN Penambangan Batubara Tahun 2018 PT. Riung Mitra Lestari Jobsite PT. Kitadin, Desa Embalut, Kecamatan Tenggarong Seberang, Kabupaten Kutai Kartanegara, Provinsi Kalimantan Timur Jessy Syarastika; Tamrin Kasim
Journals Mining Engineering : Bina Tambang Vol 3, No 3 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

One of PT Riung Mitra Lestari site mines is pit S22GN. Pit S22GN has 20,8 Ha of areas that operated since January 2018. In location, it observed many puddle of surface water that can disturb front and coal haulling . This is caused by mine drainage unfully set by company and flat topography so water is difficult to flows. Beside that, a wide catchment area is very potentially create so much run off. Groundwater observed participated to become a total runoff so it should be analyzed. Plan of precipitation based on data 2008 – 2017 shows that in 2018 rainfall will be maximum in 98,96 mm/day, so it effected to intensity of rain fall in catchment area 1 is 3,88 mm/hour and catchment 2 is 4,87 mm/jam in 2 years of cycle periods. Calculation result shows, in catchment 1 produces 3636 m3/hour of runoff and 131,017 m3/hour of groundwater that flows to the front, and in catchment area 2 produces 1927,6 m3/hour flows to minedout area. It designed 2 kinds of sump (main sump and temporary sump) and 2 kinds of open channel with trapezium shapes of cross section. Water flows helped by 2 kinds of VolvoKSBLCC-H 200-610 pumps with HDPE piping. And at last, settling pond designed become 5 compartement with 1313,424 m3 of capacity each one. Keyword: Mine Drainage, Hydrogeological Analysis, Sump, Open Channel, Settling Pond

PENGOLAHAN TEMBAGA (Cu) DALAM SAMPEL BATUAN MENGGUNAKAN METODE EKSTRAKSI PELARUT KELAT DITIZON DENGAN VARIASI WAKTU DAN pH OPTIMUM Hendrawansyah Putra; Fadhilah Fadhilah; Edi Nasra
Journals Mining Engineering : Bina Tambang Vol 1, No 1 (2014): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

ABSTRAK Penelitian mengenai pengolahan tembaga (Cu) dalam sampel batuan menggunakan metode ekstraksi pelarut kelat ditizon dengan variasi waktu dan pH telah dilakukan.Sampel yang digunakan dalam penelitian ini adalah conto batuan yang berasal dari Kecamatan Bonjol, Kabupaten Pasaman, Sumatera Barat.Tujuan penelitian ini untuk mengetahui pengaruh pH dan waktu dalam pengolahan tembaga dengan menggunakan metode ekstraksi pelarut kelat ditizon. Kadar Logam tembaga (Cu) diukur dengan menggunakan alat Atomic Absorption Spectroscopy (AAS).Hasil yang didapat menunjukkan bahwa waktu pengolahan yang optimal terjadi selama waktu 10 menit, sedangkan pH pengolahan yang optimal terjadi pada pH 7. Kadar yang didapat jika menggunakan metode ektraksi pelarut kelat ditizon sebesar 1,60 ppm, sedangkan dengan menggunakan pelarut asam didapat kadar rata-rata sebesar 0,45 ppm. Terjadi peningkatan recovery sebesar 3,5x apabila menggunakan metode ekstraksi pelarut kelat ditizon. Keywords : Tembaga (Cu), pH optimum, waktu optimum, Pengolahan ABSTRACT The research about copper (Cu) processing of the rock sample using the chelating dithizone solvent extraction method by time and pH variation has been done. The sample used in this research is rock sample taken from Bonjol sub-district, Pasaman district, West Sumatera.The purpose of this research is to find out the influence of pH and time in copper processing by using chelating dithizone solvent extraction method by time and pH variation. The content of copper (Cu) metal measured by using Atomic Absorption Spectroscopy (AAS).The result shows that 10 minutes are the optimum time to proceed. Meanwhile 7 is the optimum pH to proceed. The average content can be obtained by using 1. 60 ppm chelating dithizone solvent extraction method, meanwhile by using acid solvent 0. 45 ppm the average content can be obtained. The content increases as big as 3.5x by using chelating dithizone solvent extraction method. Key words: Copper (Cu), pH Optimum, Time Optimum, Processing.

PEMETAAN KESTABILAN LERENG PADA LOKASI PENAMBANGAN EMAS PIT DURIAN PT J RESOURCES BOLAANG MONGONDOW SITE BAKAN KECAMATAN LOLAYAN KABUPATEN BOLAANG MONGONDOW SULAWESI UTARA Osmaini Sutra Haryati; Raimon Kopa; Heri Prabowo
Journals Mining Engineering : Bina Tambang Vol 3, No 1 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v3i1.9066

PT J Resources Bolaang Mongondow (JRBM) adalah anak perusahaan PT J Resources Nusantara yang bergerak di bidang usaha pertambangan emas dengan metode tambang terbuka. Operasi produksi PT JRBM saat ini berpusat di site Bakan, Kecamatan Lolayan, Kabupaten Bolaang Mongondow Sulawesi Utara. Selama pengoperasian tambang sejak tahun 2013 telah terjadi beberapa kasus longsor di Pit Durian. Penelitian mengenai kondisi massa batuan terganggu di Pit Durian belum pernah dilakukan sehingga potensi longsor di area pit belum dapat diketahui.Pengamatan langsung di lapangan terhadap bekas bekas longsor menunjukkan bahwa terdapat kontrol struktur yang dominan dalam menghadirkan longsor. Secara geologi, site bakan merupakan zona yang mengalami alterasi hidrotermal. Proses alterasi mempengaruhi komposisi mineral dan kekuatan batuan sehingga secara tidak langsung juga memberikan kontribusi dalam terjadinya longsor. Penelitian ini menganalisis tingkat kestabilan lereng dan tipe potensi longsor yang hadir di Pit Durian serta kaitannya dengan tipe alterasi. Tipe potensi longsor di analisis secara kinematik sedangkan tingkat kestabilan lereng di analisis dengan metode klasifikasi rock mass rating (RMR) dan slope mass rating (SMR).Analisis dilakukan terhadap 102 klasifikasi segmen dan alterasi di pit Durian Tabung 3 pada elavasi 665mRL – 680 mRL. 65% lereng berada dalam kondisi stabil (kelas SMR II), 25% segmen agak stabil (kelas SMR III), 6% tidak stabil (kelas SMR IV) dan 4% sangat tidak stabil (Kelas SMR V). Secara kinematik potensi longsor tipe topling hadir di 44% segmen lereng penelitian, sedangkan tipe planar 18%, tipe wedge 36% dan 35% tidak berpotensi longsor. Hasil analisis menunjukkan bahwa kestabilan lereng pada zona alterasi argilik dikontrol oleh karakteristik massa batuan sedangkan stabilitas lereng pada zona silisik dan argilik lanjut relatif dikontrol oleh struktur.Desain awal rekomendasi perkuatan lereng terhadap lereng yang tidak stabil disarankan berdasarkan Klasifikasi Romana (1985). Re-excavation disarankan untuk lereng yang sangat tidak stabil, pembuatan toe ditch disarankan untuk lereng yang agak stabil, dan sistematic shortcrete atau ekskavasi ulang disarankan untuk lereng yang tidak stabil. Hasil analisis keseluruhan diinterpretasikan dalam bentuk peta kerawanan longsor.

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