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Bina Tambang
Published by Universitas Negeri Padang
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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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Search results for , issue "Vol 3, No 2 (2018): Jurnal Bina Tambang" : 20 Documents clear
Analisis Pengaruh Pengaturan Close Side Setting (CSS) Cone Crusher Terhadap Kapasitas Produksi Dalam Meningkatkan Produk Split 1-2 CM Pada Tambang Andesit PT. Koto Alam Sejahtera Anisa Rahmi; Syamsul Bahri; Murad Murad
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
Publisher : Jurusan Teknik Pertambangan FT UNP

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Abstract

PT. Semen Padang has 4 units of crushing plant there are crusher II, IIIA,IIIB, and VI. Production of limestone crusher in April 2017 is 692,755 tons, while thetarget of limestone crusher production is 804,749 tons so the target of limestonecrusher production in PT. Semen Padang in April 2017 was not achieved. This iscaused of the target crusher working hours are not achieved, frequent improvementsin the crusher, and the change of usage belt conveyor lines. The purpose of thisresearch is to get the performance value of crushing plant and belt conveyor, get theproduction capacity of belt conveyor, reveal the ideal crusher working system so wecan get the ideal limestone crusher production.This research was combined between theory with field data, then we can getthe problem solving approach, and the result of data processing will be analyzed forsubsequent to be generated a recommendation.Based on the research result can be concluded. First, the performance ofcrushing plant and belt conveyor is not optimal because the work efficiency oflimestone crusher II is 26,20%, crusher IIIA is 21,54%, and crusher IIIB is 28,33%.Second, the minimum production capacity of the belt conveyor is 1,409.7 tons/hour.Third, the ideal crusher working hours is 672 hours in a month so that the productionof limestone crusher 810,992 tons in a month.
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
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
Publisher : Jurusan Teknik Pertambangan FT UNP

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Abstract

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
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
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
Publisher : Jurusan Teknik Pertambangan FT UNP

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Abstract

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
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
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
Publisher : Jurusan Teknik Pertambangan FT UNP

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Abstract

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
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 Benti Jul Sosantri; Dedi Yulhendra; Heri Prabowo
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
Publisher : Jurusan Teknik Pertambangan FT UNP

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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.
EVALUASI SISTEM DEWATERING PADA TAMBANG EMAS BAWAH TANAH CIURUG L.450 BAGIAN SELATAN DI UPBE PONGKOR PT. ANEKA TAMBANG (PERSERO) TBK. Dwi Hariana Pane; Rusli HAR; Tamrin Kasim
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
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Abstract

Dalam sistem penambangan bawah tanah pada lokasi Ciurug L.450 PT. ANTAM (Persero) Tbk UBPE Pongkor masalah yang sering terjadi adalah banyak air yang masuk atau tergenang. Oleh karena itu dibutuhkan sistem penyaliran tambang untuk menunjang jalannya aktivitas penambangan, sehingga berbagai infrastruktur yang dibuat bertujuan untuk mengendalikan air yang mengalir di area penambangan khususnya di dalam lubang bukaan. Sistem penanganan air di daerah ini lebih diperhatikan karena berhubungan langsung dengan aktivitas penambangan yang selalu bersifat mobile (bergerak), sehingga debit air yang keluar harus sesuai dengan debit air yang masuk ke dalam tambang.Pada daerah Ciurug L.450 bagian selatan mempunyai 7 mine sump, karena sistem pemompaan dilakukan dengan cara mengalirkan air dari satu mine sump ke mine sump berikutnya hingga mencapai ke mine sump utama. Jenis pompa yang digunakan Tsurumi LH637, Tsurumi LH875 dan Warman 4/3 EHH. Jumlah pompa yang digunakan saat ini berjumlah 28 unit, dikarenakan besarnya debit air tanah yang masuk. Banyaknya pemakain jumlah pompa diakibatkan belum adanya pengukuran debit air secara detail pada tambang Ciurug L.450 bagian selatan. Pengukuran debit air tanah pada tambang Ciurug L.450 bagian selatan dilakukan secara manual terbagi atas dua daerah yaitu Ramp Down A (RD A) menggunakan wadah drum dan Ramp Down B (RD B) menggunakan paritan.Berdasarkan pembahasan dan analisis data dapat disimpulkan debit air tanah pada daerah RD A XC 452 sebesar 0,317 (m3/m) dan XC 445 sebesar 0,112 (m3/m) sedangkan pada RD B debit air 9,29 (m3/m) dan jumlah unit pompa yang dibutuhkan untuk mengeringkan air berjumlah 23 unit terdiri dari 8 unit Tsurumi LH637, 3 unit Tsurumi LH875 dan 12 unit Warman 4/3 EEH serta rancangan instalasi pemompaan yang ideal dan efektif.Kata Kunci: Sistem Penyaliran, Pompa, Debit Air
KAJIAN DAYA DUKUNG PONDASI JALAN UNTUK RELOKASI JALAN LINGKAR TOWNSITE PADA PT. BUKIT ASAM (PERSERO), TBK, UNIT PENAMBANGAN TANJUNG ENIM, SUMATERA SELATAN Rendi Julianto Elsa; Syamsul Bahri; Yoszi Mingsi Anaperta
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
Publisher : Jurusan Teknik Pertambangan FT UNP

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PT Bukit Asam (Persero), Tbk as the one of STATE-OWNED company under the Ministry of Energy and Mining was the main manufacture of coal mining industry in Indonesia, located at Tanjung Enim, South Sumatera. There are three sites in PTBA mining permit area, Tambang Air Laya, Muara Tiga Besar, and Banko Barat. On the site of Tambang Air Laya will planned an expansion of the pit area and build a new Lingkar Townsite road for fluency mobilization. There are several problems have been founded to build a roads in Lingkar Townsite road, such as the unknown value of basic soil density and physical properties of soil layers, and also there is a weak point of the road beause there is a former swamp that directly closed without throwing away the mud first such as STA point 200, 300, 400, 600, 700, 800, 900, 1100, 1300, and 1400.To solving those problems is done by testing the density of the soil with the Dynamic Cone Penetrometer (DCP) and the California Bearing Ratio (CBR). And also physical properties testing such as atterberge, paraffin wax density, water content, and grain size is done with. In addition to direct the testing in field, the testing is also done as a light compaction test in labor as an order to guidelines doing compaction for the road. On the compaction for the road there are three stages of compactions work that is basic layers compaction, bottom binders layer, and top binders layer.Based on basic soil hardness test the result values of CBR test are 6.56 %, 3.98 %, 5.29%, 3.96%, 3.86%, 5.63% , 8.90%, 6.74%, 5.48% , 5.73%, 5.61%. The type of soil at Lingkar Townsite relocation road is loam soil and silty soil. Many Compactor track doing soil compaction, for compacting Basecose B is 11 tracks and for Basecose A is 10 tracks. After doing the compation will get the value of final road. After doing the compaction the result values pf CBR are 14.7% , 72.69%, 58.39%, 35.00%, 36.78%, 21.85%, 31.69%, 51.31%, 27.21%, 13.43%.Keywords : Road compaction, Dynamic Cone Penetrometer (DCP), and CaliforniaBearing Ratio (CBR)
Analisis Kestabilan Lereng Studi Kasus Kelongsoran Ruas Jalan Sicincin-Malalak KM 27.6 Kecamatan Malalak, Kabupaten Agam Qiratul Aini; Raimon Kopa; Rusli HAR
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
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Abstract

Badan Penanggulangan Bencana Daerah Kabupaten Agam, Sumatera Barat, menyatakan sekitar 65.068 dari 519.000 warga Agam berada dan tinggal di lokasi rawan tanah longsor. Salah satu kejadian longsor di Kecamatan Malalak (2017), mengakibatkan penutupan ruas jalan alternatif Sicincin-Bukittinggi. Selain itu, terdapatnya titik yang rawan terhadap longsor yaitu pada titik S 0° 22.314' dan E 100° 17.339 dengan elevasi 1212 mdpl.Penelitian ini merupakan penelitian terapan (applied research) dengan metode kuantitatif. Analisis kestabilan lereng dibantu dengan software tambang. Data yang digunakan adalah data primer yang terdiri dari data sifat fisik tanah yaitu: kadar air tanah, bobot isi tanah, dan spesific gravity, data kuat geser tanah dimana uji kuat geser tanah akan menghasilkan nilai kohesi (c) dan sudut geser dalam tanah (????), tinggi lereng (m), sudut kemiringan lereng (˚) dan ketebalan tiap lapisan tanah pada lereng penelitian(m). Sedangkan untuk data sekunder terdiri dari Peta Geologi, Peta Hidrogeologi, data curah hujan, Peta Topografi Kabupaten Agam dan Peta Zonasi Gempa Indonesia.Hasil analisis menunjukkan nilai faktor keamanan lereng aktual tanpa memasukkan nilai getaran gempa pada kondisi kering adalah 1,388, kondisi asli adalah 1,040 dan pada kondisi jenuh adalah 0,755. Kemudian nilai faktor keamanan lereng dengan memasukkan nilai faktor getaran gempa pada kondisi kering nilainya 0,742, pada kondisi asli nilainya nilainya 0,599 dan pada kondisi jenuh 0,340. Dari hasil analisis kestabilan lereng menunjukkan bahwa pada saat lereng tidak dipengaruhi nilai faktor getaran gempa nilai faktor keamanannya pada kondisi asli dan jenuh tidak aman karena nilainya <1.25, sedangkan saat kondisi kering lereng tersebut dalam keadaan stabil. Sedangkan jika lereng dipengaruhi getaran gempa didapatkan pada semua kondisi lereng stabil. Kemudian, penulis merekomendasikan untuk perbaikan stabilitas lereng dengan mengubah kemiringan lereng dari 61˚ menjadi 42˚ pada kondisi tanpa memasukkan nilai getaran gempa dapat menaikkan nilai FK lereng nilainya yaitu 1.403, dimana menurut Joseph E. Bowles (1984) lereng tersebut sudah pada kondisi aman.Kata kunci: analisis kestabilan lereng, faktor keamanan, getaran gempa
ESTIMASI CADANGAN INSITU MELALUI KEGIATAN INPIT DRILL PADA BUKIT EVEREST, CHEROKEE, DAN STRADA DI PT ANTAM (Persero) Tbk UBPN SULTRA Fathonie Yurnia H; Mulya Gusman; Adree Octova
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
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Abstract

Penelitian ini membahas tentang pengoptimasian cadangan insitu nikel laterit pada Bukit Everest, Cherokee, dan Strada di PT ANTAM (Persero) Tbk UBPN SULTRA. Karena pada lokasi tersebut berdasarkan laporan penelitian terdahulu adanya perbedaan hasil estimasi cadangan berdasarkan klasifikasi kadar yaitu bijih dengan kadar Ni < 1.3 % tergolong pada kualitas waste, bijih dengan kadar Ni 1.3 -1.5 % tergolong kualitas limonit, bijih dengan kadar Ni 1.5 – 1.8 % tergolong kualitas Low Grade Saprolite Ore (LGSO), bijih dengan kadar Ni 1.8 – 2.0 % tergolong pada kualitas Hight Grade Saprolite Ore (HGSO), sedangkan untuk bijih dengan kadar Ni > 2.0 % akan mempertimbangkan kadar Fe dari bijih tersebut. Apabila Fe < 14 % maka tergolong kedalam HGSO dan jika Fe > 14 % maka tergolong LGSO dari kegiatan eksplorasi rinci dan inpit drill. Oleh karena itu perlu dilakukan pengkajian mengenai hal-hal yang menyebabkan perbedaan estimasi cadangan serta nilai ekonomis kegiatan inpit drill sehingga didapatkan benefit dari kegiatan inpit drill. Metode penelitian yang diterapkan adalah deskriptif kualitatif yang bersifat pembuktian dengan memadukan beberapa data yang meliputi kajian pustaka, data pengeboran, dan data analisis kadar serta nilai ekonomis dari kegiatan inpit drill. Berdasarkan hasil penelitian yang dilaksanakan dapat disimpulkan beberapa hal berikut. Pertama, Perbedaan yang signifikan terjadi pada kualitas LGSO dan HGSO karena jumlah cadangan yang memiliki nilai ekonomis dan dijadikan sebagai umpan pabrik yaitu HGSO dan LGSO pada kegiatan inpit drill lebih banyak dibandingkan pada kegiatan eksplorasi rinci.Kata Kunci: Cadangan, Eksplorasi Rinci, Inpit Drill, Nikel, Nilai ekonomis
PERHITUNGAN SUMBERDAYA TERUKUR BATUBARA DAN PERANCANGAN PIT PADA AREA PIT C PT. PIPIT MUTIARA JAYA (PT.PMJ) SITE BEBATU, DESA BEBATU KEBUN, KECAMATAN SESAYAP HILIR, KABUPATEN TANA TIDUNG, PROVINSI KALIMANTAN UTARA. Dody Iswandi; Tamrin Kasim; Murad Murad
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
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Abstract

PT. Pipit Mutiara Jaya is one of the companies engaged in mining, especiallycoal. The company is located in Bebatu Village, Sesayap downstream, Tana Tidung,North Kalimantan Province. PT. Pipit Mutiara Jaya is applying an open pit systemand is currently engaged in mining and exploration activities. The area explorationis called Pit CFG. After the company undertook detailed exploration activities thecompany has not conducted data processing to determine the quantity of measuredcoal resources, the value of stripping ratio, and the design pit at Pit C PT. PipitMutiara Jaya.Coal exploration was conducted on coal seam with research area + 24 ha.The information used in estimating the measured coal resource in the study areacame from 146 drill hole data and the mean distance between 50 meter drill holeswith the average depth of 60 meter borehole. Result of calculation of coal resourceby using method of polygon in mining software. Total of overburden is 12.488.344bcm which consist of amount of overburden, mud and the consecutive amount ofmix material is 3.309.185 bcm, 6.119.439 bcm and 3.059.719 bcm then total coaltonnage is 1.296 .445 tons consisting of 101B1 866.901 ton and 101H 429.544 tonsof seam and the stripping ratio is 1: 9,63.Keywords: exploration, coal, mine, drill, resource, polygon, overburden, seam,stripping ratio, pit

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