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Journals Mining Engineering : Bina Tambang

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Published by Universitas Negeri Padang

ISSN : - EISSN : 23023333 DOI : -

Core Subject : Science,

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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Articles 609 Documents

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PENENTUAN KADAR PERAK (AG) DALAM BATUAN TERMINERALISASI MENGGUNAKAN METODE EKSTRAKSI PELARUT KELAT DITIZON DENGAN VARIASI PH DAN WAKTU DI WILAYAH TAMBANG GALIAN RAKYAT BUKIT GUNJO JORONG TANJUNG BUNGO KEC. BONJOL KAB. PASAMAN Taufik Hidayat; 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 Telah dilakukan penelitian tentang penentuan kadar perak (Ag) dalam batuan termineralisasi menggunakan metode ekstraksi pelarut kelat ditizon dengan variasi pH dan waktu di wilayah tambang galian rakyat Bukit Gunjo Jorong Tanjung Bungo Kecamatan Bonjol Kabupaten Pasaman.Penelitian ini bertujuan untuk menentukan pH dan waktu optimum dalam pengektraksian logam perak serta dapat menentukan kadar perak pada batuan percontoh terpilih di daerah itu. Penelitian ini menggunakan metoda ekstraksi pelarut menggunakan HCL-HNOз pekat (3:1).Hasil penelitian menunjukan pH optimum berada pada pH 3, dan waktu optimum berada pada waktu 10 menit dan di dapat kadar recovery logam perak dengan metoda ekstraksi sebesar ,2573; 0,2119; 0,2270; 0,1846 ppm, dan 0,1029; 0,1059; 0,1090; 0.0636 ppm untuk hasil dengan metoda langsung, logam Ag ( ± 2,3x peningkatan jika dibandingkan dengan hasil pengukuran langsung ) dengan 4 kali pengukuran sampel.Keywords : Perak (Ag), pH optimum, waktu optimum, kadar

Analisis Beban Runtuh dan Evaluasi Lubang Bukaan Berdasarkan Metode Rock Mass Rating dan Q-System pada Tambang Bawah Tanah CV. Bara Mitra Kencana, Kota Sawahlunto, Sumatera Barat Ilep Prengki; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract.The excavation of a underground rock mass resulting a change in the balance of rock conditions such as the occurrence of rock collapse and changes in the dimensions of tunnel as a result of the displacement of the voltage distribution. It is desirable to have a good geotechnical analysis to provide an appropriate treatment of rocks excavated. This research was conducted to determine rock mass class, rock strength at BMK 34 CV Bara Mitra Kencana. Classification of rocks mass with RMR system And Q-System FK potential of wedge using unwedge software. From the measurement of several parameters of RMR method, RMR value of 48 ( Coal) and 60 (Sillstone) is obtained where as rock mass class III (fair rock), based on the Q-System obtained a value of 14 in class II for coal and 4 Class III for Sillstone. Based on the RMR-system classification, the value for span maximum is 3 m with a collapse time of 110 hours and the value of the load collapses is 1,56 tons / m2. Based on the Undwedge Software processing, there was an increase in FK values for both methods, Based on Support RMR Ground from 1,907 to 2,939 and Based on Ground Support Q-System from 1,907 to 2,078.Keywords : Underground, Rock Mass Ratting, Q-System, Safety Factor, Ground Support

Optimalisasi Produksi Alat Gali-Muat dan Alat Angkut dengan Metode Quality Control Circle (QCC) Pada Proses Penambangan Batukapur Di Area Existing PT. Semen Padang Andre Rahmat Saputra; Yoszi Mingsi Anaperta; Riko Maiyudi
Journals Mining Engineering : Bina Tambang Vol 4, No 3 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstrack Based on the production data limestone minning at existing area of PT. Semen Padang in January-February 2018, limestone mining production did not reach the target. This is due to the low productivity of the dumptruck. To find out the improvement potential of a production process and the effectiveness of using equipment, it is necessary to do an analysis using the Quality Control Circle (QCC) method. After knowing the root of the problem, ideas for improvement are given to obstacles so that production can be achieved. After doing the analysis and improvement with these methods, the production of the komatsu HD 785-7 dumptruck exceeded the planned target. However, for the values of PA, MA, UA and EU, each conveyance is still < 85% has not yet reached the optimal world class value that is > 85%, it can be concluded that the condition of the equipment is not good. It is better to do repairs to standby time and tool breakdown. Keywords: Production, Quality Control Circle, Pareto Diagram, Fishbone Method, komatsu hd 785-7 dumptruck

ESTIMASI CADANGAN INSITU MELALUI KEGIATAN INPIT DRILL PADA BUKIT EVEREST, CHEROKEE, DAN STRADA DI PT ANTAM (Persero) Tbk UBPN SULTRA Fathonie Yurnia H; Mulya Gusman; Adree Octova
Journals Mining Engineering : Bina Tambang Vol 3, No 2 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Penelitian ini membahas tentang pengoptimasian cadangan insitu nikel laterit pada Bukit Everest, Cherokee, dan Strada di PT ANTAM (Persero) Tbk UBPN SULTRA. Karena pada lokasi tersebut berdasarkan laporan penelitian terdahulu adanya perbedaan hasil estimasi cadangan berdasarkan klasifikasi kadar yaitu bijih dengan kadar Ni < 1.3 % tergolong pada kualitas waste, bijih dengan kadar Ni 1.3 -1.5 % tergolong kualitas limonit, bijih dengan kadar Ni 1.5 – 1.8 % tergolong kualitas Low Grade Saprolite Ore (LGSO), bijih dengan kadar Ni 1.8 – 2.0 % tergolong pada kualitas Hight Grade Saprolite Ore (HGSO), sedangkan untuk bijih dengan kadar Ni > 2.0 % akan mempertimbangkan kadar Fe dari bijih tersebut. Apabila Fe < 14 % maka tergolong kedalam HGSO dan jika Fe > 14 % maka tergolong LGSO dari kegiatan eksplorasi rinci dan inpit drill. Oleh karena itu perlu dilakukan pengkajian mengenai hal-hal yang menyebabkan perbedaan estimasi cadangan serta nilai ekonomis kegiatan inpit drill sehingga didapatkan benefit dari kegiatan inpit drill. Metode penelitian yang diterapkan adalah deskriptif kualitatif yang bersifat pembuktian dengan memadukan beberapa data yang meliputi kajian pustaka, data pengeboran, dan data analisis kadar serta nilai ekonomis dari kegiatan inpit drill. Berdasarkan hasil penelitian yang dilaksanakan dapat disimpulkan beberapa hal berikut. Pertama, Perbedaan yang signifikan terjadi pada kualitas LGSO dan HGSO karena jumlah cadangan yang memiliki nilai ekonomis dan dijadikan sebagai umpan pabrik yaitu HGSO dan LGSO pada kegiatan inpit drill lebih banyak dibandingkan pada kegiatan eksplorasi rinci.Kata Kunci: Cadangan, Eksplorasi Rinci, Inpit Drill, Nikel, Nilai ekonomis

Redesain Rancangan Ultimate Pit Dengan Menggunakan Software Minescape 4.118 Di Pit S41 PT. Energi Batu Hitam Kecamatan Muara Lawa & Siluq Ngurai, Kabupaten Kutai Barat, Kalimantan Timur Devit Aswandi; Dedi Yulhendra
Journals Mining Engineering : Bina Tambang Vol 4, No 1 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. The research was conducted at PT. Energi Batu Hitam in Muara Lawa and Siluq Ngurai, West Kutai, East Kalimantan. Currently the company has compiled a pit design with SR 1: 22 parameters which are assisted by a consultant PT. Runge Indonesia, the rest is the selling price of coal which is not yet in line with current coal prices. The ultimate pit design alternative is needed in accordance with the economic prices so that alternative alternatives in some SR scenarios are 15, 17 and 20. Based on the geotechnical recommendations from PT.EBH, the planned single slope geometry is a 10 meter level height, 650 slope for sidewall and highwall and 300 slope for lowwall. The width of the slope is 5 meters with an overall slope of 450. The measured results of the calculation are 1.949.132,91 tons of coal, in the SR 15 pit area 9.92 Ha obtained reserves of 84.075, 13 tons of coal and overburden volume 1.270,539,44 Bcm, on SR 17 the pit area was 15,04 Ha and mine reserves were 138.966,26 tons and overburden volume was 2.387.242,30 Bcm, on SR 20 the pit area was 24,87 Ha, and mine reserves were 291.314,81 tons and overburden volume 5.867.208,26 Bcm.Keywords: Pit Limit, Slope geometry, reserves, Stripping Ratio, Slope

Evaluasi Kebutuhan dan Estimasi Biaya Alat Muat Kobelco 380 dan Hitachi 350 Dengan Alat Angkut Scania P360 dan Mercedez Actroz 4043 Pada Pengupasan Overburden PT. Caritas Energi Indonesia Jobsite KBB, Sarolangun Eric Sandeir; Heri Prabowo
Journals Mining Engineering : Bina Tambang Vol 3, No 3 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Based on field observation on overburden removal at PT. Caritas Energi Indonesia, found that the production activity of overburden removal has not been optimal. This caused by the inconsistency between loading and transporting equipment, inefficiency of equipment and match factor which do not match, which is evident from the presence of equipment waiting in the field. The total production of actual loading equipment was 168.653,5 BCM/month, and hauling equipments was 103.530,2 BCM/month, this results in not achieving the planned overburden production target. After the analysis has obtained the cause of low production is due to the low efficiency of work and the lack of hauling equipment used. By increasing work efficiency and adding hauling equipment, total loading equipment is 185.630,4 BCM/month and hauling equipments are 177.781,7 BCM/month. The number of production increases but has not reached production targets due to high rainfall in March, the company spends a lot of time waiting for rain and slippery. This will have an impact on the increase of unavoidable standby time. From the calculation results obtained the amount of production costs of loading and hauling equipments for overburden removal before analyzed is Rp.1.095.056.103,11 /month or Rp.10.577,17/BCM, and after analyzed the amount of production cost become Rp.1.552.132.079,73/ month or Rp.8.730,55/BCM. And based on the calculation of BESR obtained SR economic value is 3,91.Keywords: Overburden, Work Efficiency, Match Factor, Production Cost, BESR.

Perencanaan dan Biaya Reklamasi pada Lahan Bekas Penambangan Batu Kapur di Front IV Bukit Karang Putih PT Semen Padang Kecamatan Lubuk Kilangan Kota Padang Provinsi Sumatera Barat Muhammad Zaki; Yunasril Yunasril; Ansosry Ansosry
Journals Mining Engineering : Bina Tambang Vol 4, No 3 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. PT Semen Padang is a limestone mining company located in Bukit Karang Putih, Padang City, West Sumatra Province, which has a Front IV mining area located in the Indarung VI mining area. In the area there are ex-mining areas (areas A, B and C) covering an area of 3 hectares which have been reclaimed but are not well-organized, located west of Crusher VI. Many relatively steep cliffs, such as in area A with a slope of 42 ° - 61º, area B with a slope of 45° and area C with a slope of 58º. This situation has the potential for landslides and causes danger in the Mobile Crusher VI series. The level geometry in the reclamation area has 5 levels with different lengths, widths, heights and slopes, and has a single slope on the left and right. When it rains the water flow in the field if the Front IV area of 15.15 Ha leads to that area and will disrupt the production activities in Crusher VI and can cause erosion. Therefore, re-reclamation planning and design costs are needed. The reclamation plan starts from the land arrangement that starts from the upper land in the form of dredging, stockpiling and overburden material removal, as well as the formation of 10 terraces on the slope of the reclamation area with a tilted bench terrace at 3%. After that management of top soil and sub soil, planting cover crops, revegetation by planting trembesi trees, maintenance for the first 3 years, and calculating the costs that will be incurred by the company in the reclamation process. Based on calculations in the planning of reclamation of ex-mining land by means of revegetation, the total total cost is obtained at Rp. 2.855.627.367.Keywords: Front IV, Crusher VI, Reclamation, Revegetation, Cost Design

STUDI ANALISIS DAN SIMULASI PENINGKATAN PRODUKTIVITAS EXCAVATOR HITACHI EX1900-6 DALAM PENGUPASAN OVERBURDEN PADA TAMBANG BATUBARA PT. MANDALA KARYA PRIMA JOBSITE PT. MANDIRI INTIPERKASA PROVINSI KALIMANTAN UTARA Amrina Aulia Siregar; Sumarya Sumarya
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. PT. Mandala Karya Prima is a mining contractor trusted by PT. Mandiri Intiperkasa for coal mining activities. In the overburden dismantling process, PT. Mandala Karya Prima uses the Hitachi EX-1900-6 excavator with a 12 m3 bucket capacity. This research was motivated by the planned overburden dismantling activity using Hitachi EX1900-6 excavators of 600 bcm / hour not reaching the target. The actual productivity of Hitachi EX1900-6 excavators for wet clay material is 556.8 lcm / hour and for sandstone material is 548.9 lcm / hour.Components that influence the productivity of excavators include material types, front loading conditions, loading methods, and skill operators. These components make work efficiency, bucket fill factor and cycle time not optimal. The actual time cycle when collecting data in the field is 38.63 seconds for clay wet material and 31.64 for sandstone material. By taking the example of cycle time, the clay wet material is 38.63 seconds, the digging rate should be 812.78 lcm / hour. But the reality in the field, the productivity of overburden dismantling of wet clay material is 556.8 lcm / hour. This loss of productivity occurs due to obstacles namely moving the front, repairing fronts, waiting hauler, spotting time, preparing position, and operator needs. Of these obstacles, the biggest contributor to loss of productivity is the waiting hauler which is ± 150 lcm / hour.Based on the theoretical formula of excavator productivity, factors that can be improved to optimize excavator productivity are work efficiency, bucket fill factor and cycle time. Efforts were made to improve work efficiency, namely dumptruck optimization, equipment management, changing loading patterns, and spotting dumptruck without maneuvering. Efforts are made to reduce cycle time, namely changing the digging pattern and making the optimum bench height. While the effort made to increase bucket fill factor is applying the right excavation technique.Keywords: Productivity, Excavator, Cycle Time, Bucket Fill Factor, Job Efficiency.

BIAYA PRODUKSI ALAT MUAT DAN ALAT ANGKUT PADA KEGIATAN PENGUPASAN OVERBURDEN PENAMBANGAN BATUBARA DI PT. KARBINDO ABESYAPRADHI Toni Mayyondra; Murad Murad; Fadhilah Fadhilah
Journals Mining Engineering : Bina Tambang Vol 2, No 1 (2015): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

PT. Karbindo Abesyapradhi is one of the coal mines located in West Sumatera province Sijunjung. In mining PT. Karbindo Abesyapradhi in cooperation with PT. Pasura Bina Mine as a sub contractor who is a subsidiary of Srikandi Group.Based on observations in stripping overburden at PT. Karbindo Abesyapradhi, it was found that the production activities of overburden is not optimal. This is caused by equipment that works on the field non optimal when used, which is visible from the unloading tool is waiting on the field.Actually total unloading production is 104,910 BCM/month, and conveyances 84,590 BCM/month, it caused not achieving the target production of overburden that has been planned not reached. After analysis it is found that the cause of low production work efficiency is low and lack of transport in use. By increasing the efficiency of work and made additional conveyance, then obtained a total production of 131,090 BCM tool loading / month and conveyance 123,436 BCM/month.From the results of the calculation, the cost of production and the means of conveyance and unloading tool to strip overburden before it is analyzed is Rp.2,511,980,033/month or Rp.29,696/BCM, and having analyzed the cost of production tools and conveyances fit into Rp.3,022,347,665/month or Rp.24,485/BCM, so to strip the overburden in accordance with the planned production target required fee of Rp.2,938,200,000

Analisis Probabilitas Kelongsoran Menggunakan Metode Monte Carlo Pada Highwall Pit SB-II BK-14 PT. Trubaindo Coal Mining, Site Melak, Kabupaten Kutai Barat, Kalimantan Timur Panji Kurnia Wiradani; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. The wider and deeper the mine open in excavation, the greater the risks will arise or further improve uncertainty, on the factors that affect the stability of that open mining slope. This relates to the spatial variabelity in rocks laboratory testing, the handling of land cover, ground water level, and the weather. To predict the possibility of landslides, landslide probability analysis is applied by using the Monte Carlo method. The study was conducted on pit Highwall SB-II BK-14 especifically in cross section of A-A', B-B ',C-C’ D-D '. sequens mining Septermber 2017. The data obtained is the classification of rocks masses with RMR and GSI criteria, the slopes geometry, the ground water level, the physical and mechanical properties of rocks, and seismic hazard. Based on data processing, cross-section A-A has the landslide probability of 10.5% with FS (deterministic) 1.25 and Reliabilty index 1.12 (<3 means unreliable design) for cross-section B-B ', C-C’ and D-D ' has no value of landslide probability, but it does not mean there is no possibility, as the mining activities progress the landslide probability will increase. Keywords: Geotechnical, Probability analysis, Geological strength Indexs, Rock Mass Rating, Monte Carlo method

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