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Journals Mining Engineering : Bina Tambang
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.
Arjuna Subject : -
Articles 609 Documents
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EVALUASI KINERJA DAN PRODUKTIVITAS BWE 203 DAN BELT CONVEYOR PADA PENGGALIAN DAN PENGANGKUTAN BATUBARA DALAM UPAYA MENCAPAI TARGET PRODUKSI PIT MUARA TIGA BESAR UTARA (MTBU) DI PT. BUKIT ASAM, TBK UNIT PERTAMBANGAN TANJUNG ENIM (UPTE) KABUPATEN MUARA ENIM PROVINSI SUMATERA SELATAN Ardhi Jafrian; Adree Octova
Journals Mining Engineering : Bina Tambang Vol 6, No 5 (2021): 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.v6i5.115184

Abstract

Abstract. PT Bukit Asam, Tbk. Tanjung Enim Mining Unit is a State Owned Enterprise (BUMN) engaged in the coal mining industry. The mining system applied is an open pit mining system with two mining methods, namely the Shovel and Truck method (coventional mining), and the Bucket Wheel Excavator System (continuous mining) method. The coal production target set by PTBA was 230,872 tons in January. The mechanical tools used are 1 (one) unit of Bucket Wheel Excavator, 1 (one) Belt Wagon unit, 1 (one) unit of Cable Rair Car, 1 (one) Hooper Car unit and 1 (one) Tripper Car unit. With the use of the above tools, the production target produced was not achieved in January. So in this study a solution will be sought so that the coal production target set can be increased and can be fulfilled in January. The factors that can influence the production of loading and transport activities are as follows: fill factor, bucket wheel rotation time, number of spills, time of obstacle and work efficiency. From the observations, the time taken for one round of the bucket wheel is 10.10 seconds so that the value of the spill in 1 minute is 83 times. With work efficiency of 26.85% in January, the achievement of production was 186,500.37. In order for production to be improved, efforts need to be made to improve work efficiency by minimizing the obstacles that occur in the field. So that we get 34.14% work efficiency in January with an achievement of 237,136.78 tons. Keywords: BWE, Productivity, Target
Analisis Kelayakan Investasi Pada Pit 2 Nambalau Tambang Batukapur PT. Bakapindo Jorong Durian Kenagarian Kamang Mudiak Kecamatan Kamang Magek Kabupaten Agam Provinsi Sumatera Barat Ferdi Domala Pani; Tri Gamela Saldy
Journals Mining Engineering : Bina Tambang Vol 6, No 5 (2021): 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.v6i5.115169

Abstract

PT. Bakapindo is a private mining company engaged in limestone mining, currently planning a new land clearing called Pit 2 Nambalau. This area has an area of 15 hectares, with a total exploration reserve of 10,315,455.50 tons and a production target of 300,000 tons per year. However, from the results of field observations, it was found that there was no grouping of cash in and cash out budgets and there was no investment feasibility study at Pit 2 Nambalau, therefore, NPV, BCR and PP methods were used to obtain an investment feasibility study. The method used in conducting this research uses the type of quantitative research. This is because in future research, data will be used in the form of numbers. The research was conducted by grouping cash flows both with tables and graphics, calculating the NPV value, calculating the BCR value, calculating the PP value, and calculating the MF of the digging and loading equipment. Based on the results of the research that the author did using 3 cash flow designs, the NPV value was Rp. 671.112.469.799,- with BCR of 3.561 and PBP for 1.12 years on cash flow A, which is cash flow with gradient costs and gradient benefits increasing. Meanwhile, in cash flow B with an increasing gradient of benefits, the NPV value is Rp. 766.820.708.490,- with a BCR of 5.63 and a PBP of 1.09 years. Meanwhile, in cash flow C with an increasing cost gradient, the NPV value is Rp. 261.459.829.799, - with a BCR of 2.00 and a PBP of 1.24 years. So based on the calculations that have been done, it can be concluded that pit 2 Nambalau is economically feasible to mine. And for the MF value obtained 0.88 with the need for 1 unit of excavator and 2 units of dumptruck.
Perbandingan Volume Overburden Berdasarkan Data Survey dengan Data Truck Count pada Pit Section 2 Timur PT. Budi Gema Gempita Kabupaten Lahat, Sumatera Selatan Rahmi Hasvah; Riko Maiyudi
Journals Mining Engineering : Bina Tambang Vol 6, No 5 (2021): 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.v6i5.115148

Abstract

PT. Budi Gema Gempita is one of the coal mining companies operating in East Merapi District, Lahat Regency, South Sumatra. The mining system used is an open pit mining system using the Open Pit Mining method. In carrying out mining operations, there are differences in production results from the data recorded by the checker in the form of truck count data and survey data. The results of the calculation of the volume of overburden material based on survey data obtained a comparison of overburden volume based on survey data and truck count data in June 2021 in the East Section 2 pit on the first week 12,574.22 bcm, second week 28,507.03 bcm, third week 16,415.47 bcm and fourth week 53,958.90 bcm.Due to the difference in the volume of survey data with truck count data, in the conclusion with actual condition of the truck count data in the form of overburden material that is sticky on the vessel dump truck or articulated dump truck being transported back to disposal because the type of material transported is in the form of mud (material containing water), making it difficult to stockpile. Meanwhile, by looking at the survey measurement conditions, there is a fill value that has not been transported to disposal, which is measured again in the survey measurement so that it reduces the cut value.
KAJIAN TEKNIS PEMELIHARAAN SETTLING POND PADA PENGOLAHAN BJIH BESI, PT. KUATASSI, KABUPATEN SOLOK, SUMATERA BARAT Maulana Assidikkey Iqra; Heri Prabowo
Journals Mining Engineering : Bina Tambang Vol 6, No 5 (2021): 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.v6i5.115164

Abstract

. PT. Karya Usaha Aneka Tambang Solok Selatan Indonesia has 6 settling pond. One thing that needs to be considered in deposition is the tailings and the dimensions of the settling pond, whether the pond is able to handle the waste that comes out of iron ore processing. The purpose of this study is to calculate the dimensions of the pond, calculate the percentage of deposition, calculate the period of dredging, calculate the length of dredging, and the costs that need to be incurred for pond maintenance.The method used in conducting this research uses the type of quantitative research. This is because in future research, data will be used in the form of numbers. The research was carried out by calculating the tailings entering the pond, taking water samples, calculating the dimensions of the pond, dredging the settling pond, the cycle time of the digging tool for dredging activities, and the cost of heavy equipment.The area and volume of the settling pond is 20345.3 m2 and the volume is 16,799.66 m3. With a depth of 0.3-0.95 m. After analyzing the maintenance cycle for pool 1 is 16.71 and pool 2 is 6.45 years. For pond dredging activities, the company uses one Hitachi zaxis 210f excavator and one Mitsubishi Fuso 220Ps Dump Truck with a total TSS tonnage transfer time of 1.17 days and a loading and digging time of 3.92 days with the dredging cost for pond 1 being Rp3,587,500. ,00. (three million five hundred eighty-seven thousand five hundred rupiah) and pool 2 is Rp. 13,511,000.00. (thirteen million five hundred and eleven thousand rupiah)
Analisis Kelayakan Investasi Menggunakan Metode Discounted Cash Flow pada Tambang Timah PT. Timah Tbk site TK Gemuruh Kecamatan Muntok, Kabupaten Bangka Barat, Kepulauan Bangka Belitung cahaya permai hutahayan; Yoszi M Anaperta
Journals Mining Engineering : Bina Tambang Vol 6, No 5 (2021): 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.v6i5.115009

Abstract

PT.Timah Tbk is a company that plans to mine lead with an IUP area of 235.692  HA in Bangka Belitung Province. In Muntok District, Bangka Barat Regency, The total reserves are 151 tons with a selling price of IDR 383.980.000 / ton which is estimated to have a mining life of 3 years. This study aims to analyze the feasibility of investing in lead mining in terms of technical, economic aspects, using the discounted cash flow (DCF) feasibility analysis method to see whether a mine with lead production is feasible or not. The results of this study, obtained cash out flow of IDR 20,482,692,562  and cash in flow of IDR 57,215,275,883. Based on the discounted cash flow (DCF) method, the NPV results were IDR 20,023,236,285  an IRR of 15%, PBP for 1 years and a PI of 4,8.
Evaluasi Penerapan Keselamatan dan Kesehatan Kerja Pada Penambangan Batubara CV. Air Mata Emas, Desa Tumpuk Tengah , Kecamatan Talawi, Kota Sawahlunto, Provinsi Sumatera Barat. asnel muhammad; fadhilah fadhilah
Journals Mining Engineering : Bina Tambang Vol 6, No 5 (2021): 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.v6i5.115190

Abstract

CV.Airmata Emas is a company engaged in coal mining with underground mining (room and pillar) and has great risks and dangers, it is necessary to apply occupational safety and health management by working according to SOPs and JSAs that have been companies that have set. Hazards and risks can occur during buffering and lorry operation activities, it is necessary to carry out a risk analysis for data on potential hazards, then weighting to determine the appropriate control method according to the conditions. To get the value of each risk as well as the implementation of Occupational Safety and Health and the application of JSA and Occupational Safety and Health SOPs obtained using questionnaires, interviews, and observations of work activities.                   The results showed that the questionnaire regarding Occupational Safety and Health (K3) on knowledge with a value of 75.33, on attitudes with a value of 83.73, and on actions with a value of 79.82. JSA and SOP have been applied in mining activities. Based on the results of the questionnaire, the JSA value was 67.33 and the SOP was 68. Risk analysis using the questionnaire results obtained that the risk that often occurs in the buffering process is slipping and falling because the road is slippery and occurs when measuring the place where the support wood will be installed in the hole that The risk level is L (Low) with a proportion of 25%, falling on broken and weathered support wood on the walls and roof of the hole when transporting the supporting wood from the lorry to the front work using a handcart, the risk level L (Low) is obtained with a percentage of 5 %, fell on the supporting wood on the wall and roof of the hole when installing the supporting connector (paran) which obtained a risk level of L (Low) with a percentage of 5%. The risk that often occurs in the process of operating the lorry is falling and slipping when carrying out an inspection at the workplace which has a risk level of L (Low) with a percentage of 40%. Control using control methods (hierarchy of control) namely elimination, substitution, Engineering Control, Administration Control, and PPE.
Analysis Stability of the Tunnel # 11 Jakarta – Bandung High Speed Train Using Finite Element Method Aprig Ustianto; Rizto Salia Zakri
Journals Mining Engineering : Bina Tambang Vol 6, No 5 (2021): 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.v6i5.115157

Abstract

Tunnel 11 has total length of 1,1 km. the shape of tunnel 11 was horseshoe with 15 meters wide and 13 meter high. Form classification rock mass rating (RMR) analysis, excavation recommendation on tunnel 11 by using full face method. Whereas actual excavation in the field with top heading and banching method. Based on the alignment required a plan of tunnel stability by using finite element. Analysis of tunnel’s stability using a full face excavation method based on RMR value. Tunnel stability with method of digging the top heading and bench and the optimized buffer based on the simulation carried out. The tunnel’s stability analysis is reviewed by the strenght factor and displacement value in the tunnel. Based on analysis with full face excavation method, on the left wall with no suport it’s got the lowest strenght factor value that is 6,3 and biggest displacement value that is 1,69 cm. with excavation on lower left side of the wall without support there was the smallest value of factor that is 5,2 and the biggest displacement value is 1,7 cm. strenght factor value by using full face excavation with top heading and benching threshold value strenght factor according to the KEPMEN 1827K/MEM/2018 and threshold deformation value according to japan society engineers ( JSCE ) based on a modeling simulation of the tunnel’s stability from economic side and stability analysis, then the optimal insulation on tunnel 11 is shotcrete K-175 #10 mm with top heading and benching excavation. 
ANALISIS KESELAMATAN DAN KESEHATAN KERJA TERHADAP JOB SAFETY ANALYSIS DAN STANDAR OPERATIONAL PROCEDURE PADA TAMBANG BATUBARA BAWAH TANAH CV. TAHITI COAL, SANGKAR PUYUH, KECAMATAN TALAWI, KOTA SAWAHLUNTO, PROVINSI SUMATERA BARAT Rizky Dhanni Fajri; Tri Gamela Saldy
Journals Mining Engineering : Bina Tambang Vol 6, No 5 (2021): 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.v6i5.115130

Abstract

CV. Tahiti Coal is an underground coal mining company located in Sangkar Puyuh, Talawi District, Sawahlunto, West Sumatra. CV. Tahiti Coal has implemented occupational safety and health (K3) in mining activities, but the implementation is still not optimal. This is due to the non-optimal use of personal protective equipment (PPE), some workers who do not comply with company regulations, the occurrence of work accidents, the need for making JSA and the required SOPs. The K3 analysis that has been applied uses a questionnaire with a knowledge value of 61.66, an attitude value of 63.37, and an action value of 59.9. Where the overall results of the questionnaire with a value of 60.31. If the value is adjusted based on the Likert scale, it is in a good range (46-60). JSA and SOP were made on jack hammer operation, lorry operation, and hauling process activities.
Analisis Kelayakan dan Pemilihan Investasi Alat Gali-Muat dan Alat Angkut di PT. Bara Prima Pratama Blok Retih Desa Batu Ampar Kecamatan Kemuning Kabupaten Indragiri Hilir Provinsi Riau Fadel Muhammad; Mulya Gusman
Journals Mining Engineering : Bina Tambang Vol 6, No 5 (2021): 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.v6i5.114936

Abstract

Abstract. PT. Bara Prima Pratama is a coal mining company located in Riau Province. The company has a production operation IUP on the Retih block with an estimated reserve of 2,635,406 tons of coal with a stripping ratio is 1:15.6 and a planned production target is 527.081 tons/year. The purpose of this research is to determine the investment feasibility of loading equipment and hauling equipment for decisioning as well as the most profitable alternative for the company to purchase it. The results of the feasibility analysis of the investment in digging and hauling equipment using the NPV and IRR methods for each alternative, there are some feasible and unfeasible alternative were obtained. Based on the Net Present Value (NPV) method, investments by cash and leasing are feasible with an NPV is Rp.28,361,887,549 for cash and NPV is Rp.10,428,627,129 for leasing, while the rent is not feasible because the NPV < 0, it is - Rp. 13,855,255,703. Based on the Internal Rate of Return (IRR) method with a MARR is 9.23%, investments by cash alternative are only feasible with an IRR value is 41.29%, while leasing and rent are unfeasible because the value of IRR < MARR , IRR value is -21.7% for leasing alterative and IRR value is -11.22% for rent alternative. So, based on the results of the analysis for the best alternative according to the NPV and IRR methods, the most profitable for the company is cash alternative.
Desain Pit Penambangan Lapisan Batubara Seam C pada Pit X PT. Bukit Asam Tbk. Nabilla Kansha; Dedi Yulhendra
Journals Mining Engineering : Bina Tambang Vol 6, No 5 (2021): 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.v6i5.115171

Abstract

Abstract. Based on the Decree of the Minister of Energy and Mineral Resources No. 1827K concerning Guidelines for the Implementation of Good Mining Rules, states that every mining company is required to report a management plan for the remaining reserves in its territory as part of conservation. One of the conservation efforts is to carry out mining of unmined reserves. This can be used to achieve the effectiveness and efficiency of the desired target. This also helps to maintain the availability of coal when certain qualities cannot be met by PT Bukit Asam Tbk. Mining operations basically require design and economic studies to get optimal results. Based on the study that has been carried out, the seam c coal seam in pit 1 north of Banko Barat has the potential to be optimized which produces a coal volume of around 442,769.68 tons with a stripping ratio of 2.9. Based on the study of Break even stripping ratio (BESR), the result is 15.7 with an economical SR of 9.76, it can be concluded that the design that has been designed is feasible to mine because it does not exceed the economical SR.

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