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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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Analisis Kebutuhan Alat Muat dan Alat Angkut Pada Kegiatan Penambangan Soil di Area 242 Dengan Penerapan Metoda Antrian Untuk Memenuhi Target Produksi Clay 3000 Ton/hari Padeni Herlita; Murad Murad
Journals Mining Engineering : Bina Tambang Vol 3, No 3 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Area 242 is a mining location located in the PT. Semen Padang area, in the process of clay mining in area 242 it uses 13 units of transport equipment and 1 piece of loading equipment. The production target for clay stripping / day is not achieved. This is due to lack of good composition of mechanical devices and the amount of waiting time that occurs on the conveyance. The purpose of this study was to calculate the productivity of the tool, calculate the harmony of the device in soil use, get the effort and reduce the queuing time on soil production in the 242 area, and get a match factor equal to 1. In this study combined between theory and field data, so that the approach to problem solving can be obtained. And the results of data processing will be analyzed to produce a recommendation. Based on the results of the study it can be concluded. First, the productivity of Kobelco SK200 on fleet 1 is 1,322.4 tons / day and the productivity of the DT Hino 500 FM260TI is 1,308.5 tons / day. Secondly, after being upgraded by 2 fleet and the addition of 1 unit of Kobelco SK200 type excavator and Kobelco SK200 productivity is 3,037.34 tons / day and DT Hino 500 FM260TI 13 units then the conveyance becomes 3006.38 tons / day. Third, efforts to reduce the queuing time to improve the composition of the tool to MF = 1. Fourth, analysis of MF calculation = 1 on fleet 1 = 13 units of Hino, fleet 2 = 13 units. Keywords: production, match factor, queuing theory, excavator, dumptruck

PENGARUH PERILAKU KARYAWAN TERHADAP PENERAPAN NORMA KESELAMATAN DAN KESEHATAN KERJA (K3) DI AREA PENAMBANGAN BATUBARA BAWAH TANAH PT. NUSA ALAM LESTARI SAWAHLUNTO, SUMATERA BARAT Khurry Mu'amalla; Rijal Abdullah; Tamrin Kasim
Journals Mining Engineering : Bina Tambang Vol 1, No 1 (2014): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Wor k accident which often happen at PT. Nusa Alam Lestari are caused by unsafe action and unsafe condition.The main cause of the accidents is the insecure employees' behavior. Those work accidents may ha ve correlation on the implementation of The Safety and Occupational Health Norms. The purpose of this study is to determine the influence of employees' knowledge, attitude and action against the implementation of The Safety and Occupational Health Norms in Underground Coal Mining of PT. Nusa Alam Lestari. The type of this r esearch is correlation research whose goal is to find out whether there is the correlation between the two variables. The population of this research is the whole temporary and permanent employees remain at PT. Nusa Alam Lestari. The total of the employees is 156 people. The size of sample in this study was determinate by using the Slovin's formula which is obtained 61 people.Data collection was obtained by using questionnaire that has been tested for validity and reliability. Furthermore the data was processed by using the SPSS computer program. On multiple linear regression analysis is obtained regression equation: Y = 0,494 + 0,350X1 + 0, 389X2 + 0, 333X3 with significant value 0.000 < 0.05. In conclusion, there is the correlation between va riables of employees' knowledge, attitude, and action and the implementation of The Safety and Occupational Health Norms which collectively contribute significantly to the implementation of The Safety and Occupational Health Norms amounted to 56,4%.

PERENCANAAN REKLAMASI LAHAN BEKAS PENAMBANGAN PIT D1 PT. AMAN TOEBILLAH PUTRA SITE LAHAT SUMATERA SELATAN Eka Retno Sari; Ansosry Ansosry; Heri Prabowo
Journals Mining Engineering : Bina Tambang Vol 3, No 1 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

The steps of the mining activities in PT. Aman Putra Toebillah includes the activities of land clearing, stripping the ground cover, the exploitation of coal, transporting, processing and marketing of coal. After the mining is finished, the ex of mining area will leave an opening hole. Therefore any company of mine obligatory to implement reclamation of ex mining area to maintain environmental sustainability. Based on Ministerial Regulation Number 7 Year 2014, reclamation are activities during of mining to organize, restore, and improve the quality of the environment and the ecosystem to the function. Therefore, it takes a good planning, so the rate reclamation success can be realized.Mining avtivities include the arrangement of land reclamation. The Inpit Dump will be covered with land cover. Then on the top layer is covered with top soil as a medium growing plants. After the arrangement is finished then the Inpit Dump will be replanting (revegetation). To prevent the erosion, we made waterways, do care and give limes to settling pond to prevent the formation of acid mine water.Based on calculations of planning reclamation and revegetation, direct costs for reclamation activities and revegetation on the Pit D1 PT. Aman Toebillah Putra amount to Rp RP 14.104.226.892,00 and indirect costs amount to Rp 1.339.901.555,00. Then the total cost of reclamation and revegetation on the site amount to Rp 15.444.128.447,00.

Analisa Distibusi Fragmentasi Pada Kegiatan Peledakan Batuan Dengan Menggunakan Simulasi Monte Carlo Dedi Yulhendra; Mulya Gusman
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

This Research based on the partially fragmentation which the boulders blasting results more than 80cms that intervene the crusher’s performance. The purpose of this Final Project is to get the exact value of powder factor; in order to attain the value of fragmentation up to 80 with optimally hold on 10%.The methodology problem that used is finding the value of rock factor by using Monte Carlo simulation and calculate the effect of powder factor on fragmentation with linear regression.The result of this final project is attained the value of rock factor 5.01 by using Monte Carlo simulation and the relationship between powder factor with the fragmentation is 72% with equation Y = -102,89X + 50,086. Based on its calculation, to attain the maximum result of fragmentation holding up to 10%, therefore the exact value of powder factor is 0,389. Keywords: boulder, fragmentation, powder factor, rock factor

ANALISIS STABILITAS LERENG PADA PIT TAMBANG AIR LAYA BARAT SECTION C-C’ PT BUKIT ASAM (PERSERO) TBK., SUMATERA SELATAN M Adli Fikri; Bambang Heriyadi; Heri Prabowo
Journals Mining Engineering : Bina Tambang Vol 3, No 2 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Mining is an activity that starts from the general investigation activities of minerals and coal. Mineral and coal mining activities in open space in the form of excavation and stockpiling will always face the problems of slope stability. Slope stability is a vital factor in the planning and operation of open pit and quarry mines. The occurrence of landslide in cross section of C-C' pit of Tambang Air Laya Barat of PT Bukit Asam (Persero) Tbk. causes this analysis to be done.This research is applied research with quantitative method. Slope stability analysis is assisted by Geostudio 2018 Slope/W trial licence 30 days version. The analysis of safety factor was done by Janbu Method. The data used are secondary data consisting of physical and mechanical parameter data of soil and rock, data of type and condition of soil and rock layout, design of mining pit plan, cross section of pit mining data, and data value of regional seismic constant.The results showed that the lowest actual value of slope safety factor was in the overall slope of low wall elevation +65 to -21 ie 0.966. Based on the analysis of data confidence increase, the overall slope on low wall is in unsafe condition, that is, single slope +57 to +13 with FK = 1.165, intermediate slope +65 to +14 with FK = 1.030, and overall slope of elevation +65 to -21 with value FK = 0.812 (FK <1.25). Based on back analysis, safety factor of single slope of +57 to +13 is 0.902, safety factor of intermediate slope is 0.747, safety factor of overall slope is 0.736. The most optimal of slope redesign recommendation is the forward-analysis method of the back-end analysis by the Hoek & Bray method. The slope recommendation is to change the geometry of the slope with the angle 19o to 11o and change the height from 85m to 76m. The single slope of the elevation +57 to +13 initially made only one single slope converted into three single slopes with each elevation +55 to +42, +42 to +29, +29 to +13.Keyword: slope stability analysis, safety factor, confidence level

EVALUASI SISTEM PENYALIRAN TAMBANG BATUBARA PADA PIT BLOCK B DI PT MINEMEX INDONESIA KABUPATEN SAROLANGUN, JAMBI Syaifullah Aziz; Tamrin Kasim
Journals Mining Engineering : Bina Tambang Vol 4, No 1 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract: Based on the analysis of rainfall data for 2008-2017, the planned rainfall was 135.22 mm/ day with rain intensity in the catchment area of 21.709 mm / hour. The return period is 5 years and the hydrogeological risk is 67.23%. In the research location, PT Minemex Indonesia Pit Block B has a catchment area with an area of 48 ha, the total discharge of incoming water is 9.510 m3 / hour, with a maximum actual sump capacity of 75,867 m3 and there are three units of Coates CD200 pumps in sump with pumping discharge of 810 m3 / hour, there are two open channels and 11 main setting pond with different capacities for each compartment.After evaluating the Pit Block B mine drainage system in 2018, the Sump Capacity will be enlarged to 182,610 m3 and requires an additional 3 Coates MFC-385 pump units to obtain a total pumping discharge of 2,310 m3 / hour. PT Minemex Indonesia's Pit Block B mine drainage system is planned to have open channels that are different from the actual and settling ponds that are the same as in 2018. The effect of the mine drainage system on production is the cause of not achieving OB and Coal production. The production of OB is 293.62 m3 / BCM and Coal is 94.75 tons / hour. Keywords: rainfall, catchment area, pump, sump, open channel, settling pond, and production

Analisis Investasi Pengadaan Alat Berat Di PT. Anugrah Halaban Sepakat Dengan Metode NPV dan IRR Hastia Ulfa; Dedi Yulhendra; Ansosry Ansosry
Journals Mining Engineering : Bina Tambang Vol 3, No 3 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

On the research of this planning tool to the needs of gali-fit and transport tool that will be discussed are short-term planning for 5 years to the needs of tool gali-fit by using Volvo EC 210 Excavator, Caterpillar 320 D and transport tools by using Nissan CWB 45. PT. Anugrah Halaban agreed to procure the tools dig-load and transport tools the way procurement is done i.e. buy direct and rent and the two methods used certainly has its disadvantages and advantages of each, for it required analysis the most beneficial way with the company, PT Anugrah Halaban agreed procurement tool gali-fit and transport tools. In this research obtained a quantity the cost of ownership and operating costs are different for each of the unit's heavy equipment and there is also a difference in the cost of ownership and operating costs for the leased instrument with the tools that are purchased directly. Cash Flow is obtained, then analyzed by using the method of Net Present Value (NPV) then it can be known whether the alternatives viable economically. For alternative buy cash from existing cash flow then obtained the value of NPV to buy cash alternative is $22523759.00 so the NPV > 0, then the alternative is declared feasible economically. And for alternative rentals from existing cash flow then obtained the value of NPV to rent alternative $22693782.85 is so NPV > 0, then the alternative is declared feasible economically. From peneitian who have 21 days in daptkan the results of the comparison analysis of NPV and IRR can be expressed that alternative procurement tools are most profitable for the company at this time was a lease because the lease is greater than the NPV NPV buy.Keywords: Investment, NPV, IRR, Trial and Error, Owning Cost, Operation Cost

KAJIAN TEKNIS PENINGKATAN PEROLEHAN CASSITERITE DENGAN MENGGUNAKAN PAN AMERICAN JIG CLEAN UP PADA UNIT KONSENTRASI TAMBANG BESAR OPEN PIT TB. 1.42 PEMALI PT. TIMAH (PERSERO), TBK Riri Ferdian; Bambang Heriyadi; Rijal Abdullah
Journals Mining Engineering : Bina Tambang Vol 1, No 1 (2014): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

ABSTRACT The concentration units at Open Pit TB 1.42 Pemali is using Pan American Jig as its main equipment. There are two steps applied to the Pan American Jig; primary jig and clean up jig. At the clean up jig operational step, the final gain of cassiterite should get a serious attention. To obtain the cassiterite concentrate content as conditioned by Tin Ore Processing Center (PBBT) Pemali, that is 40% - 65% with 97% gain, there should be an analysis to the jig operation variables that are being used and analysis to the resulting product, so that a good suitability would be acquired in order to increase the cassiterite gain based on the operational standard in every clean up jig step. According to the sampling and the calculation of the final gain of cassiterite at clean up jig, the value of the right clean up jig is 96.82%, whereas the value of the left clean up jig is lower, 91.43%. The final concrete content were resulted as follow: the right clean up jig, compartment A 38.31% SnO2, compartment B 20.76% SnO2., compartment C 13.80% SnO2.Whereas,the left clean up jig, compartment A 49. 15% SnO2,compartment B 25.09% SnO2, compartment C 23. 43% SnO2. In order to increase the cassiterite gaining through clean up jig based on the requirement, that is 97%, which done by: first, change the setting of the compartment A, B and C hit length in a chronological order, 18mm, 10mm, and 6mm with push speed resulted at the three compartments 5.943cm/s, 3.302 cm/s, and 1.981 cm/s. Second, the management of horizontal crossflow with the characteristics and the jig feed rate. Third, the uniformity of bed jig shape and size, the placement of bed jig size should be adapted with the sequence of compartment and the jig steps. Fourth, arrange the entering feed pulp by installing feed combs grader flow at feed box.Key words: jig, pan american jig, cassiterite

Kajian Teknis Penentuan Geometri Peledakan Untuk Meningkatkan Nilai Perolehan hasil Peledakan CV. Triaga Nusatama (TNT), Desa Lareh Sago Halaban, Kabupaten Lima Puluh Kota, Sumatra Barat Gestio Sesar Yulindo; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Mining activity conducted by CV Triagra Nusatama focused against drilling and blasting. Based on observations and measurements in the field, the geometry of the actual current obtained by blasting fragmentation of rock blasting results size 40-80 cm of 35.41% (calculation of the Split Desktop). Next do the draft geometry blasting to distribution fragmentation optimalisation blasting with a formula of r. l. Ash, ICI-Explosive and the combination of ICI-Explosive formula with adjustments to the conditions of the field. Based on the results of the calculation formula of using fragmentation Kuz-Ram, then the selected geometry proposed blasting II because when viewed from the use of the powder factor and the volume of rock that dismantled proposal II more economical than actual and proposed I, and the results of the fragmentation size 40–80 cm larger generated or the result is desired by the target company. And when compared with geometry proposal III, on geometry III there is a difference of use of explosives fewer, larger volume that is blown, and the resulting fragmentation size 40 – 80 cm larger, but the difference in results the fragmentation size 40–80 cm only 7.07 m3 of proposal IIKeywords: Blasting, Powder factor, Sliding Rock, Stockpile, Zig-zag Pattern

PERBANDINGAN ESTIMASI SUMBERDAYA BATUBARA MENGGUNAKAN METODE ORDINARY KRIGING DAN METODE CROSS SECTION DI PT. NAN RIANG JAMBI Reza Taufiqurrahman; Dedi Yulhendra; Adree Octova
Journals Mining Engineering : Bina Tambang Vol 2, No 1 (2015): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

PT Nan Riang is one of mining factory which located in Muara Tembesi Subdisctrict, Batanghari Regency, Jambi Province. At this time, PT Nan Riang is exploring coals in which located in Ampelu Village approximately is about 100 hectares, 43 drilling sites. Meanwhile, resource estimation of coals have never been proceed in this area, even though resource estimation is one of important things to do before mining processing. Therefore, we can find out the number of tonnages and sediment models by using resource estimation. Resource estimation is using two methods there are ordinary kriging method and cross section method. Ordinary kriging method used if the thickness is unknown, and then to estimate the thickness number from an unknown block vertically or horizontally. So that it will obtain a precipitate in the form of block models in three-dimensional models. After that process, we calculate the volume to get estimation result from coal source. Meanwhile by using cross section method it will count the volume from each slice which has been made in same direction due to coal seam direction. After we got the results from these both methods and then we are comparing and analyzing in order to get the best result, so we can use that result for main reference in carrying out mining activities. The estimation result by using kriging method will configure model from sediment and the total tonnage of coal. The total tonnage in the research area was 3.237.000 million tonnes, with overburden 15.060.000 bcm. From these calculations we got stripping ratio 4,56 bcm/tonne. We got the estimation result by using cross section method 2.661.647 tons coal tonnage, with overburden 14.459.679 bcm. From the calculation also we got stripping ratio 5,43 bcm/tonne. Because there is a difference from these calculations so we use calculation which has the smallest stripping ratio for using to calculate the production plan

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