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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 BIAYA PRODUKSI PENAMBANGAN BATU KAPUR PADA BULAN APRIL 2017 DI BUKIT KARANG PUTIH PT. SEMEN PADANG Elsa Rahma Afrila; Sumarya Sumarya; Dedi Yulhendra
Journals Mining Engineering : Bina Tambang Vol 3, No 1 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

PT Semen Padang is planning to increasing production of limestone of 650,749 tons from actual production 580.17 ton. Increased production of limestone will cause an increasing the cost of production, so the planning of main cost production of limestones per ton from the mining location to the hauling front to a dumping area is required. This cost of production was determined by how much mechanical equipments used from mining front to the dumping area. Afterwards, the cost is also influeced by the depth of the explosive holes. The depth of explosive holes should be customized by the target production from the company.Productivity of drilling machine Furukawa HCR 1500-ED II is 1.519,86 ton/hour. Productivity of loader digging equipment Backhoe Caterpillar 6030 (EC-03) is 1.292,37 tons/hour. Productivity of hauling equipment Dumptruck Komatsu HD 785-7 is427,62 tons/hour, so to reach the production target 650,749 ton is required 1 unit of drilling machine Furukawa HCR 1500 – ED II, 1 unit of Backhoe Caterpillar 6030 (EC-03), and 3 units of Dumptruck Komatsu HD 785-7. An appropriate from the depth of explosive holes to achive production target is 8.999,43 m. Production cost per ton of limestone from the mining front to the dumping area that must be issued by company in April 2017 is Rp. 11,574.71 andthe cost of production per ton oflime stone after analyzed isRp. 10.349,08 so that companies can reduce the production costs amounted to 10.58%.

Analisis Kestabilan Lubang Bukaan Dengan Menggunakan Data Dari Alat Ukur Flat Jack Pada Dinding Tambang Bawah Tanah PT. Nusa Alam Lestari, Sawahlunto Muhammad Nazri; Muhammad Giatman
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. The geomechanical aspect is one of the important aspects that must be considered to maintain the stability of the opening hole. Other aspects that must be considered are geology, hydrogeology and technical regarding buffer. Geomechanics monitoring in underground mines includes: insitu stress measurement, rock deformation monitoring, and rock mass weighting. There are many insitu stress measurements including: overcoring techniques, hydraulic fracturing techniques, and Flat Jack methods.There are several thing to do, such as determining the testing point, making a hole for the Flat position (test point), and checking the deformation that occurs at the test point. Then get the rock stress value using the calculation of gravity. Before calculating gravitational stress it is necessary to take some data. Next to get the value of rock compressive strength, the sample was tested in the laboratory using a point load index.Based on the test of the flat jack, the calculation of gravity, and the results of testing the sample is not greater in value than the sample testing, which means that the condition is able to withstand the voltage acting on the study site.Kata kunci :Flat jack, Geotechnical, Rock stress, Gravitational force calculation, Underground mine

Estimasi Sumberdaya Bijih Besi Menggunakan Metode Ordinary Krigging di PT. Gamindra Mitra Kesuma, Kec. Sungai Beremas, Kab. Pasaman Barat, Sumatera Barat Rido Muhammad Afif; Adree Octova
Journals Mining Engineering : Bina Tambang Vol 4, No 3 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

PT.Gamindra Mitra Kesuma is a mining company currently exploring iron ore in the district. Sungai Beremass to get the distribution of iron ore and the amount of iron ore available in the area. Exploration is carried out by drilling a total of 11 drill hole points on an area of 20 hectares. To find out the amount and distribution of iron ore, it is necessary to estimate the resources which currently researchers use the ordinary krigging method with spatial estimation where the error variance is minimized. Researchers used a 3-dimensional block model with a block size of 30m x 30m x 1m which is in the estimation of the study area. To carry out the process of estimating krigging, the value of sill, range, nugget is needed, to facilitate the fitting of the variogram. By analyzing the variogram with 4 main directions and all directions will get the data distribution. Estimation results using the ordinary krigging method in the form of block models that have been topped by topography and bottom topography. The estimation is obtained in the number of blocks from the results of the top topography and bottom topography where the total iron ore tonnage is 31.680.000 tons and overburden is 12.736.800 bcm with a stripping ratio of 0.402 bcm / ton. Keywords : Resource, Estimation, Ordinary Kriging, Variogram, Iron Ore

PEMETAAN ZONASI INDEKS KERENTANAN SEISMIK PADA DAERAH PASCA TAMBANG DI PT.BUKIT ASAM (PERSERO) TBK. UNIT PENAMBANGAN OMBILIN, SAWAHLUNTO Doli Ali Fitri; Adree Octova; Yoszi Mingsi Anaperta
Journals Mining Engineering : Bina Tambang Vol 3, No 2 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

The microtremor survey and research was conducted on December 10, 2017 in Tanah Hitam and Kandi, Sawahlunto. The aim of this study was to determine the value of seismic vunerability index and its microzonation at ex-mining land PT.BA UPO. The area of this study was in Tanah Hitam and Kandi by taking the microtremor data of 15 locations. The microtremor data were then processed using Horizontal to Vertical Spectral Ratio (HVSR) method to get H/V curve which generates dominant frequency (f0) value and amplification factor (A) at every observation point, which will be used in the seismic vulnerability index calculation (Kg). Seismic vulnerability index microzonation was generated using Surfer11 software. The results showed that the value of seismic vulnerability index in the ex-mining land area is between -5 x 10-6 s2/cm - 75 x 10-6 s2/cm which is categorized as low to high. The low results of seismic vulnerability index (Kg) microzonation located in the Kandi part of ex-mining land area was indicated by values between PND 4 is between 0 x 10-6 s2/cm - 5 x 10-6 s2/cm. The medium results of seismic vulnerability index (Kg) microzonation value indicated by the value of 4 x 10-6 s2/cm sampai 10 x 10-6 s2/cm was indicated by values between 2 x 10-6 s2/cm - 10 x 10-6 s2/cm spread over PND 1 point, PND 10, PND 11, PND 12 and PND 15. For microzonation results high seismic susceptibility index is damaged at point PND 3, PND 5, PND 6, PND 7, PND 8, PND 9, PND 13 and PND 14 with values ranging from 10 x 10-6 s2/cm to 34 x 10-6 s2/cm. And the result of microzonation index of high seismic susceptibility with value of 40 x 10-6 s2/cm to 48 x 10-6 s2/cm at point PND 2 and PND 8. Based on the value of the shear wave velocity (Vs30) the area has a very dense soil and soft rock with a very dense sand or clay end, gravel, at a thickness of several tens of meters. Material composers of alluvial rock formed from delta sedimentation, top soil, mud, etc.Keywords: Ex-Mining of PT.BA UPO, Horizontal to Vertical Spectral Ratio, Microtremor, Seismic Vulnerability Index

Rancangan Teknis Stockpile 2 Di PT Bukit Asam Tbk, Unit Pelabuhan Tarahan - Lampung Merja Arta; Ansosry Ansosry
Journals Mining Engineering : Bina Tambang Vol 4, No 1 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. PT Bukit Asam Tbk, is one of the largest coal mining companies in Indonesia. In distributing coal to consumers, PT Bukit Asam Tbk has supporting facilities namely Tarahan Port in Lampung and Kertapati Pier in Palembang. Coal production is increasing every year and in 2023 PT Bukit Asam Tbk plans 45 million tons of coal shipments to Tarahan Port and will require a large and maximum stockpile of capacity to meet the needs of coal shipping from Tanjung Enim. The actualization of the evaluation of the stockpile 2 capacity was 189,213.84 tons of the planned 250,000 tons of coal capacity. If there is a rain of coal spilling into the open channel (drainage) until it covers around the stockpile 2 which has a length of 625 m. This causes the formation of acid water in the bottom of the stockpile and causes flooding around it. So recommendations were made to minimize the occurrence of landslides and reduce the use of excavators for cleaning drainage.Keywords: Stockpile, Drainage,Capacity, Excavator, Coal

Evaluasi Biaya Dan Kebutuhan Alat Angkut Dan Alat Muat Pengupasan Lapisan Tanah Penutup (Overburden) Pit B PT. Bina Bara Sejahtera Kecamatan Ulok Kupai, Kabupaten Bengkulu Utara, Provinsi Bengkulu Fachrur Isgianda; Sumarya Sumarya; Heri Prabowo
Journals Mining Engineering : Bina Tambang Vol 3, No 3 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

PT. Bina Bara Sejahtera targets overburden demolition of 175.000 bcm/month, but all that has not been achieved. Efforts to achieve the production target of overburden from the work of mechanical devices is to calculate the actual work efficiency and increase the efficiency of mechanical work. Actual work efficiency Komatsu PC300 Excavators that work on fleet 1 53,91%, fleet 2 52,22%, fleet 3 50,53% and fleet 4 51,47%, Volvo BMA35C ADT on fleet 1 55,15%, fleet 2 50,81%, fleet 3 50,36% and fleet 4 is 52,08%. Work efficiency after increasing efficiency Komatsu PC300 Excavators that work on fleet 1 67,97%, fleet 2 67,22, fleet 3 64,47% and fleet 4 66,47%. Volvo BMA35C ADT on fleet 1 74,91%, fleet 2 67,22%, fleet 3 64,47% and fleet 4 66,47%. Actual production on the dismantling of fleet 1 overburden 28.944.24 bcm/month, fleet 2 28.449.67 bcm/month, fleet 3 22.955.50 bcm/month and fleet 4 36.844.61 bcm/month, after increasing work efficiency dismantling fleet overburden 1 53.402 bcm/month, fleet 2 52.168.92 bcm/month, fleet 3 40.365,49 bcm/month and fleet 4 60.548.61 bcm/month. Operating cost of disassembling operations for Volvo BMA35C Komatsu PC300 and ADT Excavator overburden Rp.2.317.249.728. Operating cost after increasing work efficiency Rp.3.019.797.720. The actual overburden per Bcm fee is Rp.19.772/bcm after evaluation Rp. 16.125/bcmKeywords: Cycle Time,Stripping Overburden, Cost of overburden, work efficiency

Optimasi Alat Muat dan Alat Angkut Untuk Meningkatkan Produksi Limestone Setelah Indarung VI Berproduksi Di PT Semen Padang Marta Borisman; Ansosry Ansosry
Journals Mining Engineering : Bina Tambang Vol 4, No 3 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Indarung VI factory began production in April 2017, causing an increase in the need forlimestone, which was sourced from the Existing Area, from 679,140 tons to 826,833 tons. This study aimsto find out whether production equipment in the existing area are able to meet these increased needs, anddetermine the optimization that must be done so that the needs are met. The approach taken is to make asimulation that describes the actual conditions (operating patterns, effective hours, productivity of tools) inthe field, to be compared with the production target. Optimization is done by analyzing the productivity ofproduction equipment and effective hours, compared with their theoretical productivity. After beingsimulated, it is known that the production equipment has an actual production capability of 679,140 tons,with a percentage of the production target of 82%. limestone. This means that production equipment has notmet the production target, so production equipment optimization must be done. Optimization carried out:Improved work efficiency Improved work efficiency from 58.97% to 82.65%, and redesigning matchingfleet. After the optimization above, the existing area production equipment has a total limestone productionof 840,111 tons per month, with a production achievement of 102%.Keywords: Optimization; Simulation; Effective Hours;Productivity;matching fleet

Kajian Teknis Penyangga Baja Three Piece Sets dan Five Piece Sets Pada Lubang Bukaan Tambang Batubara Bawah Tanah Pit Central Barat Di PT. Allied Indo Coal Jaya Redy Pratama; Raimon Kopa
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Underground mining require system, design, and mine support capacity planning. The purpose of this research is to study technical part of the use of three piece and five piece steel support at Central Barat PIT underground mine in PT. Allied Indo Coal Jaya. The idea is comparing maximum moment of three pieces structured i-beam with five pieces structured support which almost has arches shape in the same area in the underground mine. This research method is quantitative, which mean getting numeric data, calculating load that apply on mine support, calculating mass of potential rock fall using appropriate empiric equation approach to measure the load that apply on these underground mine support. The research result shows that maximum moment on three pieces bar (BC) = 17.25 kN m and five pieces bar (CD) = 3.99 kN m. Five piece support take less moment compared to three pieces support, due to smaller surface and it distribute the load to each bar. At the same area, five pieces use smaller steel size 80 mm x 42 mm and 5,94 kg/m compared to three pieces with 140 mm x 66 mm and 14,37 kg/m size of steel. This cause the cost for steel use for five pieces support is more economical than three pieces supportKey words; steel support, underground mine, three piece, five piece, and maximum moment

Optimalisasi Timbunan Banko Barat Pit-1 Timur Tahun 2014 di PT. Bukit Asam (Persero), Tbk Unit Penambangan Tanjung Enim Andre Gustian; Bambang Heriyadi; Yoszi Mingsi Anaperta
Journals Mining Engineering : Bina Tambang Vol 2, No 1 (2015): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Site selection is influenced by several factors like the volume of material to be deposited, whether or not coal seams underneath, distance and topography. The amount of material that must be stockpiled on site Disposal Dumping Material (heap) the longer the sums are increasing, This goes along with the progress of mining.Considering the increasing number of opening new mines in PT. Bukit Asam (Persero), Tbk, so that the soil exposition needs to be managed properly. Required to standardize the management of the soil pile, so the pile area can be used optimally.From the direct she ar strength test results data showed parameter are cohesion ( C ) = 36.24 kPa, friction angle (f) = 16.72˚, and wet density (gw) = 19.36 kN/m3Based on simulation results F Kon a pile Banko Barat Pit-1 Timur derived the optimization of simulation (Geostudio/ Slope W 2007) sho thatby adding 7 ladder more with 6 meter high slope, angle ofa single slope 1: 2 and 25 meter of wide berm is still safe.

Analisis Kesetabilan Lereng Studi Kasus Area Tambang Rakyat di Bukit Tui S0°28'43.15" E100°24'16.24"-S0°28'43.15" E100°24'15.28" Kecamatan Padang Panjang Barat Kabupaten Padang Panjang Helky Sandra; Yoszi Mingsi Anaperta
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Tui Hill is a limestone hill lined south of Padang Panjang, located between Rao-Rao Village to Tanah Hitam. The results of research at Tui Hill at the location S0 ° 28'43.15 "E100 ° 24'16.24" - S0 ° 28'43.15 "E 100 ° 24'15.28" located in Tanah Hitam Village has a covered dolomite rock slope. Based on the situation that occurs there are several factors that can relate to avalanches. such as rainfall, steep slope geometry, high excavation and earthquake vibration. The potential for landslides on the research slopes could endanger dolomite miners in the slope location. In addition, material due to landslides can cause road closures to obstruct road user traffic. This study aims to analyze and make treatment recommendations so that slope conditions become safe / stable. Safe slope analysis is based on the value of the safety factor (FK), namely Bowles, that (FK) so that the stable slope is FK> 1.25. Based on the results of the analysis and calculations it was found that the value of the slope safety factor (FK) on the A-A 'section is 2,631 and the B-B' section is 2,342. Based on the results of the analysis, it was found that the value of the slope safety factor (FK) in the A-A 'is 2,200 and B-B' section is 1,943.Keywords: Slope Stability Analysis, Safety Factor, Earthquake Vibration, Plane Failure, Slope Soil

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