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Yulhendra, Dedi
Jurusan Teknik Pertambangan FT UNP

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PERENCANAAN PENAMBANGAN JANGKA MENENGAH (QUARTERLY PLAN) NIKEL LATERIT PADA PIT A, B DAN C PT. GANE PERMAI SENTOSA HARITA NICKEL PULAU OBI, MALUKU UTARA Y.R, Annisa Intan; Yulhendra, Dedi; Octova, Adree
Bina Tambang Vol 1, No 2 (2014): Jurnal Bina Tambang
Publisher : Jurusan Teknik Pertambangan FT UNP

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Abstract

PT. Gane Permai Sentosa (Nickel Harita Group) is one of the private mining companies that are conducting nickel laterite mining in Obi island, South Halmahera, North Maluku Province. PT. Gane Permai Sentosa is using open pit mine as its mining method. Of the block models that has been estimated by krigging method, there are 1,215,946 tons of mineable reserve ore which is the result of blending between high grade ore with 2.02% of Ni grade which has the portion 67% in total of mineable reserve and medium-grade ore with 1,60% Ni grade which has 33% in total of mineable reserve. That will be blanded and will reach 1.90% grade of Ni and the average stripping ratio is 1.57 and can be mined for 6 month. With the production target of ore is 200,000 tonnes in a month as like as buyer spesification that minimum Ni grade is 1.85% We can conclude that for the medium term mining in Pit A, B and C will be able to be mined and reach production targets set.  Keywords: reserve calculation, production schedulling, ore analysis
Pengendalian Waktu Efektif Bulldozer CAT D8R Rental Untuk Meminimalisasi Biaya Operasional Di PT Bukit Asam Tbk Unit Pelabuhan Tarahan Bandar Lampung Davinci, Ronaldo; Yulhendra, Dedi
Bina Tambang Vol 4, No 1 (2019): JURNAL BINA TAMBANG
Publisher : Jurusan Teknik Pertambangan FT UNP

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Abstract. The D8R CAT Bulldozer is one type of mechanical device used for port operations through a rental system between PT Bukit Asam Tbk Tarahan Port Unit and PT Lematang. The high hours of the Bulldozer road will certainly have an impact on operational costs as well as the cost of the rental unit itself and the consumption of fuel oil. It is hoped that using the Overall Equipment Effectiveness (OEE) method in this case can be a solution to detect the main causes of the high hours of bulldozers. Determine the magnitude of each factor of the six major losses that affect the effectiveness of Bulldozer Performance, and analysis of the factors that are the top priority as a basis for improvement.Keywords: Effective Time, Overall Equipment Effectiveness (OEE), Six Big Losess, SPSS, and Bulldozer CAT D8R
PERBANDINGAN ESTIMASI SUMBERDAYA BATUBARA MENGGUNAKAN METODE ORDINARY KRIGING DAN METODE CROSS SECTION DI PT. NAN RIANG JAMBI Taufiqurrahman, Reza; Yulhendra, Dedi; Octova, Adree
Bina Tambang Vol 2, No 1 (2015): Jurnal Bina Tambang
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Abstract

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
IDENTIFIKASI TINGKAT KESERAGAMAN BATUAN HASIL PELEDAKAN DENGAN METODE KUZ-RAM DAN METODE KOEFISIEN TEKSTUR PADA FRONT I TAMBANG QUARRY PT. SEMEN PADANG Gomis, Marchellevandra; Yulhendra, Dedi; Ansosry, Ansosry
Bina Tambang Vol 2, No 1 (2015): Jurnal Bina Tambang
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Abstract

PT. Semen Padang is one of the greats cement producer industry in Indonesia. PT. Semen Padang has a mining business license for limestone mining at Bukit Karang Putih – Indarung, Padang City, West Sumatera. For getting limestone, PT. Semen Padang used quarry mine system and blasting technique in separating limestone from rock body.In blasting, one of success variable can be viewed from the size of fragmentation and rock uniform level. Size of fragmentation and rock uniform level can be expected with good blast geometry plan. Will be obtained good rock fragmentation, and good uniform level. From the geometry of the blasting used in PT Semen Padang, obtained rock size fragmentation up from 120 cm percentage is 7,84 % with rock uniform level 1,47 and the volume of rock explosed 126 m3 from one blast hole. The percentage of rock filtered is quite good. However, it’s not followed by rock uniform level and rock explosed volume. So that, need for changes blast geometry with ICI – Explosive Method for getting good fragmentation size, good rock uniform level and large rock explosed volume.After calculated and experimented in the site. The most suitable blast geometry is 5 m for spacing and 4 m for burden. So, we can get 210 m3 limestone from one blast hole, with size of rock fragmentation up from 120 cm is 20,92 %, and rock uniform level 1,26. Therefore, will have the impact on increasing the limestones product and rock uniform level better.
OPTIMALISASI PERALATAN TAMBANG DENGAN METODA OVERALL EQUIPMENT EFFECTIVENESS (OEE) DI PIT 1 PENAMBANGAN BATUBARA BANKO BARAT PT BUKIT ASAM (PERSERO) TBK TANJUNG ENIM SUMATERA SELATAN Sosantri, Benti Jul; Yulhendra, Dedi; Prabowo, Heri
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
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Abstract

Batubara merupakan salah satu sumber energi yang sangat potensial dalampemanfaatannya. Batubara banyak dimanfaatkan untuk berbagai keperluanproduksi mulai dari industri kecil hingga besar dan sebagian besar batubara diIndonesia telah diekspor hampir ke seluruh dunia antara lain ke negara-negaraAsia dan Eropa. Salah satu tambang batubara yang ada di Indonesia yaitu PTBukit Asam (Persero) Tbk.Proses produksi batubara PT Bukit Asam tepatnya pada Pit 1 Banko Baratmenggunakan alat gali muat excavator Komatsu PC 400 LC serta alat angkutdump truck Scania P360 dengan tujuan untuk dapat meningkatkan hasil produksiyang maksimal secara konsisten, tetapi kondisi aktual dilapangan tidaktercapainya target produksi yang telah ditetapkan setiap bulannya karenadisebabkan oleh beberapa faktor seperti manusia, lingkungan, peralatan, dansistem, dengan demikian perlu dilakukannya peningkatan produksi denganmelakukan perbaikan terhadap beberapa faktor tersebut. Salah satu metoda yangbisa digunakan adalah metoda Overall Equipment Effectiveness (OEE).Overall Equipment Effectiveness adalah metoda pengukuran efektivitaspenggunaan suatu peralatan. OEE dikenal sebagai salah satu aplikasi programtotal productive maintenance kemampuan mengidentifikasi secara jelas akarpermasalahan dan faktor penyebabnya sehingga membuat usaha perbaikanmenjadi terfokus merupakan faktor utama metode ini. Metode ini diaplikasikansecara menyeluruh oleh banyak perusahaan di dunia. Pada penelitian kali iniperhitungan yang dilakukan adalah menghitung produktivitas tanpa metoda OEEselanjutnya dengan metoda OEE. Objek penelitian adalah alat gali muat excavatorKomatsu PC 400 LC dan alat angkut dump truck Scania P360. Dari hasilperhitungan diperoleh nilai OEE masing-masing peralatan masih < 85% belummencapai nilai OEE kelas dunia >85%, dapat disimpulkan bahwa keadaanperalatan kurang baik. Sebaiknya dilakukan perbaikan terhadap waktu standbydan breakdown alat.
Analisis Rock Factor Dan Pengaruh Powder Factor Terhadap Fragmentasi Pada Batuan Limestone Di Bukit Karang Putih Pt. Semen Padang (Persero) Prima, Harifan; Yulhendra, Dedi; Abdullah, Rijal
Bina Tambang Vol 3, No 1 (2018): Jurnal Bina Tambang
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Abstract

This final project is 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.
ANALISIS MENAJEMEN FLEET PADA KEGIATAN PENGUPASAN OVERBURDEN PT. ARTAMULIA TATAPRATAMA DI DESA TANJUNG BELIT, KECAMATAN JUJUHAN, KABUPATEN MUARO BUNGO Rahman, Fadel; Sumarya, Sumarya; Yulhendra, Dedi
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
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Abstract

PT.Artamulia Tatapratama is a company engaged in the field of coal mining. PT.Artamulia Tatapratama is located at Tanjung Belit Village, Jujuhan District, Muaro BungoRegency.In the overburden hauling process to the disposal area there is a dumptruk queue atsome point of the road and long stand by time on the loader, this can cause the loader andhauler productivity to be small so that the production target of 1.190.838 bcm / monthoverburden is not reached. This incompetence is due to a combination of unsuitable toolscausing the occurrence of a waiting gateway or a queue of loads when it is loaded by aloading device. One way to achieve the production targets is required appropriate fleetmanagement.Based on the theory of queue, the waiting time for the conveyance at the time will beloaded is 13.62 minutes on fleet 1, 22.88 minutes on fleet 2 and 14.58 minutes on fleet 3.Fleet setting based on the queue theory is 1 unit PC 1250 serving 6 units of HD 465 on fleet1, 1 unit PC 1250 serving 4 units of HD 465 on fleet 2, 1 unit PC 1250 serving 5 units of HD465 on fleet 3.
PERENCANAAN BIAYA DAN KEBUTUHAN ALAT MUAT DAN ANGKUT PADA LOKASI PENAMBANGAN AREA 242,3Ha BATU KAPUR PT.SEMEN PADANG SUMATERA BARAT Andreas, Androly; Sumarya, Sumarya; Yulhendra, Dedi
Bina Tambang Vol 1, No 1 (2014): Jurnal Bina Tambang
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Abstract

ABSTRAKPT. Semen Padang (Persero) merupakan salah satu perusahaan pertambangan yang berlokasi di Sumatera Barat. Pada saat ini penambangan dilakukan pada front IV tapi karena kadar silika pada  front  tersebut  sudah  menurun perusahaan  mempunyai rencana  melakukan  penambangan  pada  area  242,3Ha yang belum pernah dilakukan penambangan sebelumnya. Penambangan di kuari bukit   karang putih mengunakan kombinasi antara alat muat (Excavator Hitachi) dan alat angkut (Dump Truck Komatsu).Untuk mencapai target produksi  yang ditetapkan perusahaan maka pada area 242,3Ha penambangan mengunakan kombinasi alat mekanis  yang  berupa Excavator dan Dump Truck dimana Excavator yang ada saat ini sebanyak 2 buah sedangkan Dump Truck yang dibutuhkan  sebanyak 7 buah untuk  shift I yang terdiri dari 4 buah Dump Truck berkapasitas 100 ton dan 3 buah yang berkapasitas  80  ton sedangkan untuk shift II mengunakan 2 buah Excavator dan 6 buah Dump truk yang terdiri dari  3  buah untuk  yang berkapasitas 100 ton dan 3 buah untuk berkapsitas 80 ton.Secara teoritis kemampuan produksi yang dapat dihasilkan alat mekanis jika dilakukan penambangan pada area 242,3Ha dengan kondisi seperti saat ini adalah sebesar 33214,654 ton perhari sedangkan target produksi yang ditargetkan perusahaan adalah sebesar 30.000 ton perhari dengan demikian target produksi yang dihasilkan nanti akan tercapai. Biaya yang dibutuhkan jika dilakukan penambangan pada area area 242,3Ha ini untuk alat muat pada shift I adalah sebesar Rp 2668,377/ton, dan  untuk  alat angkut pada shift I adalah Rp 5841,278/ton sedangkan pada shift II biaya pemuatan sebesar Rp 2668,377/ton dan  untuk  biaya  pengangkutan  Rp 5476,955/ton.Kata Kunci: biaya, alat muat, alat angkut.
ANALISIS BIAYA PRODUKSI PENAMBANGAN BATU KAPUR PADA BULAN APRIL 2017 DI BUKIT KARANG PUTIH PT. SEMEN PADANG Afrila, Elsa Rahma; Sumarya, Sumarya; Yulhendra, Dedi
Bina Tambang Vol 3, No 1 (2018): Jurnal Bina Tambang
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Abstract

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%.
OPTIMASI GEOMETRI PELEDAKAN UNTUK MENCAPAI TARGET FRAGMENTASI DAN DIGGABILITY DALAM PEMENUHAN TARGET PRODUKTIVITAS ORE DI PIT DURIAN BARAT DAN PIT SOUTH OSELA SITE BAKAN PT J RESOURCES BOLAANG MONGONDOW SULAWESI UTARA Putri, Milia; Yulhendra, Dedi; Octova, Adree
Bina Tambang Vol 3, No 1 (2018): Jurnal Bina Tambang
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Abstract

Pemberaian batuan merupakan salah satu tahapan yang sangat penting dalam operasipenambangan. Metode pemberaian batuan yang umum digunakan adalah peledakan yang bertujuanuntuk memberai batuan sesuai ukuran fragmentasi yang telah direncanakan. Keefektifan kegiatanpeledakan menjadi salah satu tolak ukur keberhasilan kegiatan pemuatan (loading material) yangsangat mempengaruhi ketercapaian target produktivitas penambangan. Penelitian ini bertujuanuntuk mengestimasi geometri peledakan optimum untuk meminimalisir persentase jumlah bouldersehingga kegiatan pemuatan (loading material) menjadi lebih efektif dan target produktivitastercapai. Studi kasus penelitian dilakukan pada 8 blok peledakan di Pit Durian Barat dan 8 blokpeledakan di Pit South Osela yang keduanya berada di PT J Resources Bolaang MongondowSulawesi Utara Indonesia. Data penelitian terdiri dari fragmentasi peledakan, digging time, cycletime, digging rate, dan produktivitas penambangan ore. Metode penelitian dilakukan denganestimasi geometri peledakan menurut teori R.L. Ash dan C.J. Konya, pemodelan statistik, serta ujitrial and error. Dari analisis data yang dilakukan, untuk mencapai target produktivitaspenambangan sebesar 700 bcm/jam maka persentase jumlah boulder adalah 3 %, digging time 7detik, cycle time 15 detik, dan digging rate 750 bcm/jam pada Pit Durian Barat, sementara padaPit South Osela persentase jumlah boulder 3 %, digging time 6 detik, cycle time 14 detik, dandigging rate 800 bcm/jam. Untuk meminimalisir persentase jumlah boulder maka perlu dilakukanrevisi geometri peledakan berdasarkan teori C.J. Konya dengan reduksi ukuran boulder sebesar4,26 s.d. 5,10 % dengan peningkatan produktivitas sebesar 141 s.d. 215 bcm/jam, dengan demikiantarget produktivitas ore dapat tercapai.