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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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Analisis Penyanggaan Berdasarkan Karakteristik Batuan Pada Atap dan Dinding Lubang Tambang Batubara Bawah Tanah BMK-04 di CV. Bara Mitra Kencana, Kecamatan Talawi, Sawahlunto Wahyu Eko Prasetianto; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 3, No 3 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Physical properties and mechanical properties of rocks will be needed for analyzed RMR-Bieniawski 1989. The data will then be needed for supporting calculations (Biron and Arioglu theory, 1983). Based on the results of soil mechanical laboratory test and rock mechanics obtained values of physical properties for claystone is an average water content value 3.46%, the average spesific grafity 2.42, and average density 1.54 grams/cm3. For sandstone the natural density 2.55 gr/cm3, the dry density 2.53 gr/cm3, the saturated density 2,69 gr/cm3, apperent SG 2,53, true SG 3, natural water content 0.73%, saturated water content 6.15%, degree of saturation of 11.93%, porosity 15.56%, and void ratio 0.18. For marlstone we get the natural density 2,83 gr/cm3, the dry density 2,77 gr/cm3, the saturated density 2,88 gr/cm3, apperent SG 2,77, true SG 3,14, natural water content 1.94%, saturated water content 3,86%, degree of saturation 57,09%, porosity 10,99%, and void ratio 0,13. For mechanical properties such as, compressive strength of claystone 1,25 MPa, sandstone 3,64 MPa, and marlstone 5,48 MPa. From the results of the Bieniawski-1989 RMR analysis, the rocks on the roof and wall tunnel BMK-04 has a value of RMR 56 and include to rock class III. RMR 56 have span value and stand up time 1 week to 5 m span. Based on the analysis using Biron and Arioglu theory in 1983 obtained the value of stress to the cap of 414.01 Kg/cm2, side post 369.91 Kg/cm2, and the distance between wedges of 5,52 cm.Keywords: Ground Support, Geotechnical, Rock characteristhics, Rock Mass properties (RMR-System), Underground mining.

PERENCANAAN REKLAMASI DI TIMBUNAN MAHAYUNG PT.BUKIT ASAM (PERSERO) TBK, TANJUNG ENIM, SUMATERA SELATAN Afriyanti Puspita Sari; Yunasril Yunasril; Syamsul Bahri
Journals Mining Engineering : Bina Tambang Vol 2, No 1 (2015): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Mining activities conducted in PTBA is directed to undertake the mining environmentally.Mining activities conducted include exploration, land clearing, stripping topsoil, excavation ofoverburden ,coal mining, transporting, processing and marketing of coal. Reclamation is theactivities that are performed throughout the stages of the mining effort to organize, restore, andimprove the quality of the environment and the ecosystem to function returns appropriateallocation. The success of reclamation activities according to Regulations the Minister ofMineral Resources number 07 2014 covering the activities of the arrangement of land, thepromised land of tops (top soil), water management and erosion control, revegetation and theprevention and mitigation of acid mine water. All activities on the reclamation process aboverequires considerable cost and its implementation should be planned so that the cost have to beeffective and efficient.Technical planning of reclamation on the outside dump Mahayung 2015 designed byrearranging the land by using the method of encapsulation, perform the promised land of tops toimmediately do revegetasi, make and take care of the channel that is in a outside dump ofMahayung to prevent erosion and maintain the water and add to the compartment on a pool ofMud and Precipitator liming regularly to prevent the occurrence of acid mine water. The cost forthe reclamation activities at the outside dump of Mahayung is the total cost of reclamationconsists of two that is direct costs and indirect costs. Direct costs for reclaiming the year 2015amount Rp 39.565.434.558,- and indirect costs Rp 3.758.716.283,- Then the total cost ofreclaiming the year 2015 amount to Rp 43.324.150.841

Evaluasi Pengaruh Geometri Jalan Angkut Terhadap Produktivitas Dump Truck Mitsubishi Fuso 220 PS dari Front Penambangan Menuju Unit Crusher pada Penambangan Batu Andesit PT Koto Alam Sejahtera Fadhilah Maharani; 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 Koto Alam Sejahtera located in Nagari Koto Alam, Pangkalan Koto Baru Subdistrict, Lima Puluh Kota District, West Sumatra Province. The production target of PT Koto Alam Sejahtera is 30.000 tons / month, meanwhile the actual production is 16.965,6 tons / month. Based on observations, the road grade is still high, no cross slope is visible and two conveyances cant’t pass at the same time because the width on the road is narrow.This type of research is applied research by combining theory and field data to solve problems. The actual road width ranged is from 6,35-12,15 meters while theoretically is 9 meters. The actual bend road width ranges is from 6,20-12,70 meters while theoretically is 12 meters. Actual road grades range from 3,49%-19,44% while the ideal road grade is 8%. The cross slope value for the 9 meter road width is 0,04 and the height difference is 18 cm. The superelevation value for the 12 meter bend width is 0,04 and the height difference is 48 cm.There were 7 straight road width segments that needed to be added and 2 bend road width segments, and there are 8 segments that need to be downgraded. Productivity of Mitsubishi Fuso 220 PS with actual conditions of 16.965,6 tons / month. The estimated increase in the productivity of Mitsubishi Fuso 220 PS after an evaluation is 27.593,89. Theoretical productivity of Mitsubishi Fuso 220 PS after the improvement of work efficiency is 34.395,3 tons / month.Keywords: Road Geometry, Production, Dump Truck, Work Efficiency, Cross Slope

Evaluasi Teknis Geometri Jalan Angkut Produksi Sebagai Upaya Percapaian Target Produksi Batubara 20000 ton/bulan di Tambang Terbuka PT. Allied Indo Coal Jaya (AICJ), Perambahan, Kecamatan Talawi, Kota Sawalunto, Sumatera Barat. Rizky Nanda Putra; Tamrin Kasim
Journals Mining Engineering : Bina Tambang Vol 4, No 3 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Based on the results of the road geometry evaluation, the following results show that the actual straight road width is between 6.2 - 10.2 m, whereas theoretically the width of the straight road must be made 9 m. The actual grade grades from Stockpile to the West Pit range from 6.98% to 15.83%. The cross slope from Pit to disposal is 4%. Superelevation figures are recommended to overcome road bends with a maximum speed of 40 km / h with a width of 12 meters curved road is 4.98%. The actual productivity before repairing the haul road using the dump truck is Hino Ranger FM 260 JD an average of 18.47 Ton / Hour. This productivity has not yet reached the production target set by PT. Alliet Indo Coal Jaya which is equal to 20000 tons / month. As for productivity after road repairs, 20.90 tons / hour. Keywords: Geometry, Stockpile, Haul Road, Productivity, Target.

IDENTIFIKASI KEBERADAAN AIR TANAH MENGGUNAKAN METODE GEOLISTRIK RESITIVITAS KONFIGURASI SCHLUMBERGER DI DAERAH PANDAWA, JORONG TAROK, KECAMATAN 2 x 11 KAYU TANAM Fandi Aulia Syofyan; Adree Octova; Yoszi Mingsi Anaperta
Journals Mining Engineering : Bina Tambang Vol 3, No 1 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Pandawa, Jorong Tarok District 2 x 11 Kayu Tanam is one of the difficult areas of water in Padang Pariaman Regency. One of the causes of the difficulty to meet the water needs is due to unknown groundwater source distribution. The distribution of groundwater in Pandawa is important to know, to know the location of the water source and its subsurface shape, therefore has been conducted research that aims to know the distribution, depth, and type of ground water aquifers in the Pandawa area. This research is a descriptive basic research. Measurements were made using MAE X-612 EM Resistivitymeter as the main instrument. Data is taken using Schlumberger configuration on 3 paths. The results of data analysis are interpreted using Smoothness-Constraint Least Squares Inversion with the help of Res2dinv Software and Voxler 4.0 Software. The result of interpretation of data is the value of rock type resistance and rock depth of research area. The data estimation is done by comparing the actual type of resistance value with the species resistance table and the geology of the research area, so that the water distribution and depth of soil from the soil surface can be obtained. The results of this study indicate that the distribution of groundwater on the parallel track of Trajectory 1 and 2 tends to lead from the North to the South. Groundwater is encountered in the range from 7 - 20 m with a range of resistance values of 6.87 Ωm - 32.6 Ωm.

Simulasi Pengaruh Kadar Air Tanah terhadap Parameter Mekanik untuk Desain Lereng Tanah di Bukit Tui, Kelurahan Tanah Hitam, Kecamatan Padang Panjang Barat, Kota Padang Panjang, Provinsi Sumatera Barat Ahmad Abdillah; Yoszi Mingsi Anaperta
Journals Mining Engineering : Bina Tambang Vol 4, No 1 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Tui Hill is a limestone hill lined south of Padang Panjang. The results of investigations on the slopes of Bukit Tui at the location of S0 ° 28 '18.5 "E100 ° 23' 54.7 located in Tanah Hitam, have cracking of 20 m long, 1.5 m deep, 60 cm wide. This study aims to design a safe slope design by considering changes in mechanical parameters (cohesion and inner shear angle) due to increased soil water content. From several simulations of increasing water content values, slope FK calculations were performed. The calculation results show that in the original condition FK 1.632 was obtained, for the simulation of increasing the water content value, additional water from 5% to 20% was carried out. The addition of 5% water was obtained by FK 1,567. 10% water addition was obtained FK 1.425, 15% water addition obtained FK value 1.2273, 20% addition of water obtained FK 1.080. For the safe slope design FK values were taken in the condition of adding 20% moisture content, FK = 1.080. Based on this consideration, stable slope conditions can be achieved by reducing the slope with a slope consisting of three levels with a height of 15 m and a slope of 380, the second level with an altitude of 10.003 m and slope 400, the last level with a height of 10 m and slope 360. Keywords: Slope Stability Analysis, moisture content, safety factor (FK), cohesion, inner sliding angle

ANALISIS KESTABILAN LERENG JALAN TAMBANG DI PT. SUMBAR CALCIUM PRATAMA JORONG ATAS HALABAN, NAGARI HALABAN, KECAMATAN LAREH SAGO HALABAN, KABUPATEN LIMA PULUH KOTA, PROVINSI SUMATERA BARAT Rully Septian; 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 area. Planning of the slope geometry will be used by Bishop Simplified and Hoek and Bray methods.Initial data Clay: Unit Wight (γ) = 19.67 kN / m3, Cohesion (c ') = 32.17 kN/ m2 and internal angle (φ') = 39.11 °. The initial slope height is 14.543 meters and overall angle of the slope is 51 °.Geometry of slope recommendation: 1. Bishop Simplified method of saturated condition FK 0.984 witch mean slope is insecurity, reduction of slope angle from 51 ° to 42 °, FK 1,324 slope in safe state. 2. Method Hoek and Bray saturated conditions FK 1.25 Unsafe slope, slope angle from 51 ° to 42 °, then FK 1.41 slope in safe condition.Keywords: initial geometry, bishop simplified, hoek and bray, security factor

Perencanaan Sistem Penyaliran Tambang Batubara Bawah Tanah Seam C1 Blok Timur Site Sapan Dalam PT Nusa Alam Lestari Desa Salak, Sapan Dalam, Kota Sawahlunto, Sumatera Barat Stella Putri Pratama; Tamrin Kasim
Journals Mining Engineering : Bina Tambang Vol 4, No 1 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. PT Nusa Alam Lestari in July 2018 on the mining front of the Seam C1 hole carried out mining activities along the 97 meter opening hole in the main hole and 4 branch holes that had been realized. The amount of groundwater discharge entering the mining area at the Seam C1 hole is 5.112 m3 / minute. The number and specifications of the ideal pump for pumping water from the Seam C1 pit mine front are 2 units of Airlux pump with a discharge capacity of 6 m3 / hour in operation, with an Airlux pump with a discharge capacity of 6 m3 / hour with a maximum head of 12 meter; the actual total head is 25.08 m on front of Seam C1. The dimensions and shape of the sump design are ideal for underground coal mine drainage systems at the Seam C1 mining site planned to be rectangular with dimensions of 2 m in length, 1 m in width, 2 m in depth. Keywords: Underground Mine, Mine Dewatering, Groundwater Discharge, Pump, Sump

Desain Pit Tambang Air Laya Barat Untuk Memenuhi Target Produksi Tahun 2018 PT. Bukit Asam (Persero) Tbk Sumatera Selatan Kiki Gusmaningsih; Murad Murad; Dedi Yulhendra
Journals Mining Engineering : Bina Tambang Vol 3, No 3 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

PT. Bukit Asam (Persero), Tbk has produced coal used by various parties, the greater the market demand for coal use trigger PT. BA to increase target production per year. The target of coal production at Tambang Air Laya Barat in 2017 is 3,500,000 Ton of coal and 20,750,000 BCM overburden. The year 2018 increased to 5,500,000 Ton and 33,000,000 BCM overburden. Based on current conditions the company needs to consider design pit options for the year 2018. Determination target production per month, the number of units that work, as well as the profits to be gained. Result reserve design pit of Tambang Air Laya Barat 2018 obtained 5,639,178 Ton of coal and 32,764,431 BCM overburden with stripping ratio 1:5,81 and recovery 90%. The target production plan is determined based on the capability of the main mining equipment each month. The main fleet allocation for mine for January uses 5 fleets coal and 12 fleets overburden, February 4 fleets coal and 12 fleets overburden, March 4 fleets for coal and 12 fleets for overburden, allocated for April - December equals such as January. Overall cost for coal sales Rp. 7.403.987.221.897, overburden stripping Rp. 1.285.969.138.002 and coal production Rp. 97.182.467.072, so the profit to be obtained from mining proceeds for the year 2018 Rp. 6,020,835,616,822, so mining is worth doing feasible. Need to be studied further by considering costs such as coal processing, port transportation, employee salary so that net profit can be obtained.Keywords: Design Pit, Target Production, Overburden, Coal, Profits

ANALISIS INVESTASI PENGADAAN ALAT BERAT DI PT. KARBINDO ABESYAPRADHI DENGAN METODE NPV DAN IRR Rizto Salia Zakri; Murad Murad; Sumarya Sumarya
Journals Mining Engineering : Bina Tambang Vol 1, No 2 (2014): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract This research start from the condition in the field in PT. Karbindo Abesyapradhi, where the heavy equipment damage to often, it make production target never reach. To reach the target, is important to buy some new heavy equipment, but it can make some problem about the cost of investment. There are 3 option to buy some new heavy equipment, one of the option will be a best option and can make the company get profit. For this problem the writer make this research, to know the best alternative to the company.In this research the writer use quantitative research method and also use descriptive method. From this reseach we will know comparation from each option. Sample will represent all of heavy equipment of PT. Karbindo Abesyapradhi have.Based on this research, we know that buy a new heavy equipment cash is the best option for the company, where the company will get benefit from this option. This result become from trial with Net Present Value method, where the cash option get the higgest NPV value, while when we test with Internal Rate of Return after pass the incremental analitysis produce the result that the cash option be a best option and have the most benefit for the company and it can apply for all kind of heavy equipment in PT. Karbindo Abesyapradhi. Kata kunci : Investment, Heavy Equipment, NPV, IRR, Incremental Analysis

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