Bina Tambang
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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 Kestabilan Lereng Studi Kasus Kelongsoran Ruas Jalan Sicincin-Malalak KM 27.6 Kecamatan Malalak, Kabupaten Agam Aini, Qiratul; Kopa, Raimon; HAR, Rusli
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 Yurnia H, Fathonie; Gusman, Mulya; Octova, Adree
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. Iswandi, Dody; Kasim, Tamrin; MS, 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
ANALISIS KELAYAKAN INVESTASI MENGGUNAKAN METODA DISCOUNTED CASH FLOW TAMBANG GALENA PT. TRIPLE EIGHT ENERGY, KECAMATAN KOTO PARIK GADANG DIATEH KABUPATEN SOLOK SELATAN PROVINSI SUMATERA BARAT Sidauruk, Dirga; Giatman, Muhammad; MS, Murad
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
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Abstract

To perform the feasibility analysis of investment can be done by using severalmethods, PT. Triple Eight Energy with galena commodity using discounted cash flowas its method of analysis. Based on the calculation, obtained cash out flow of Rp649.289.950.100, cash in flow of Rp 2.361.317.978.504, NPV of Rp 789.154.337.450,payback period for 2 years 7,4 months, discounted payback period for 2 years 3, 5months, IRR of 30.98%, PI of 23.6300447. From these calculations it can beconcluded that, galena mine PT. Triple Eight Energy is economically viableKata kunci: analisis investasi, tambang galena, discounted cash flow
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 REKLAMASI LAHAN BEKAS PENAMBANGAN PIT D1 PT. AMAN TOEBILLAH PUTRA SITE LAHAT SUMATERA SELATAN Sari, Eka Retno; Ansosry, Ansosry; Prabowo, Heri
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
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Abstract

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.Keywords: Reclamation Plans, Costs, Pit D1
Evaluasi Kinerja Crushing Plant Dan Belt Conveyor Dalam Pengolahan Dan Pengiriman Limestone Ke Storage Indarung di PT. Semen Padang Yulia, Fitri Eka; Kopa, Raimon; Anaperta, Yoszi Mingsi
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
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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 the target of limestone crusher production is 804,749 tons so the target of limestone crusher production in PT. Semen Padang in April 2017 was not achieved. This is caused of the target crusher working hours are not achieved, frequent improvements in the crusher, and the change of usage belt conveyor lines. The purpose of this research is to get the performance value of crushing plant and belt conveyor, get the production capacity of belt conveyor, reveal the ideal crusher working system so we can get the ideal limestone crusher production.This research was combined between theory with field data, then we can get the problem solving approach, and the result of data processing will be analyzed for subsequent to be generated a recommendation.Based on the research result can be concluded. First, the performance of crushing plant and belt conveyor is not optimal because the work efficiency of limestone 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 production of limestone crusher 810,992 tons in a month. Keyword: Production target, limestone crusher, belt conveyor
Faktor-faktor Penyebab Kecelakaan Kerja di Areal Penambangan Batu Kapur pada Pt. Sumbar Calcium Pratama Hidayat, Rezki; Abdullah, Rijal; Anaperta, Yoszi Mingsi
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
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Abstract

At PT. Sumbar Calcium Pratama found several violations against existingSOP. There are still many workers who work in hazardous work positions, the useof equipment and machines in an unsafe way and they not use the protection toolsthat have been provided by the company. The purpose of this research is to revealthe factors that cause work accidents, reveal the most dominant factors as thecause of occupational accidents, reveal the potential hazards that can causeaccidents, can calculate the percentage of the frequency and severity of workaccidents, can cause human error or unsafe employee behavior, and can give anidea of the use of hazard card.In this research, combined between theory with field data, so get problemsolving approach. And the results of data processing will be analyzed forsubsequent to be generated a recommendation.Based on the results of research conducted can be summed up some of thefollowing. First, accident-causing factors are generally caused by unsafe andunsafe measures, the most dominant factor is unsafe, other potential hazards thatallow the occurrence of accidents in the implementation of mining activities inPT. Sumbar Calcium Pratama, such as the convetional mining, in 2016, 87.3%frequency rate and severity rate of 43.69%, and the results of the questionnairenote that the attitude and application of employees are in fairly good category.Keywords: K3, unsafe action, unsafe condition
OPTIMASI ALAT GALI MUAT DAN ALAT ANGKUT TERHADAP PRODUKSI BATUBARA DENGAN METODE KAPASITAS PRODUKSI DAN METODE TEORI ANTRIAN PADA PIT TAMAN PERIODE OKTOBER 2016 UNIT PERTAMBANGAN TANJUNG ENIM PT. BUKIT ASAM (PERSERO) Tbk. Alifa, Alifa; Gusman, Mulya; Prabowo, Heri
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
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Abstract

Equipment is a very important factor in ensuring the sustainability of mining production. Theamount of excess fleet will result in inflated operating expenses, while the number of fleetsthat little will reduce the number of mine production. Ideal conditions in the process ofloading and transportation of materials is very difficult to achieve. However, it can beattempted through efficiency tehadap number of major mining dump truck. One simulationmethod that can be used to optimize the production of electric load - dump truck main methodis to use the production capacity and queuing theory. Simulations conducted in order toobtain optimum number of trucks with truck queuing time the minimum and avoid waiting forthe appliance load dump truck.Unloading tool used was Excavator Backhoe Komatsu PC 400 consist of 2 units. Dump truckwhich is a truck used Hino 500 FM 320 TI totaling 12 units. Based on simulation results withsimulation approach production capacity dump truck takes 11 units while the dump truckqueues based on the theory that it takes 11 units. In actual dump truck used is 12 units.Keywords : excavator, dump truck, match factor, production optimize, queuing theory
STUDI KELAYAKAN EKONOMIS PENAMBANGAN DAN PENGOLAHAN BAHAN GALIAN BASALT MENJADI BATU SPLIT DI AREA BUKIT KARANG PUTIH PT SEMEN PADANG Monalisa, M; Gusman, Mulya; Ansosry, A
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
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Abstract

PT Semen Padang merupakan salah satu perusahaan produsen semen di Indonesia yang mengelola dan memenuhi kebutuhan bahan baku utamanya sendiri. Selain terdapat bahan galian silicastone dan limestone, PT Semen Padang juga meiliki sumberdaya bahan galian basalt yang belum dimanfaatkan. Bentuk dan penanganan dalam memanfaatkan bahan galian basalt berupa penambangan dan pengolahan yang menghasilkan output berupa batu split. Hal ini dilakukan karena bahan galian basalt tidak dapat dijadikan bahan dalam pembuatan semen kerena memiliki kadar MgO lebih besar dari 5%. Sebelum dilakukannya kegiatan penambangan perlu dikaji terlebih dahulu kelayakan teknis dan ekonomis dari penambangan dan pengolahan bahan galian basalt tersebut.Kegiatan penambangan yang dilakukan berupa pemboran dan peledakan dengan kedalam lubang ledak hasil pemboran 9,2m dan volume yang terbongkar sebanyak 44558,6 ton/bulan. Bahan peledak yang digunakan sebanyak 5127.5 kg Dabex, 66 pcs inhole delay, 65pcs surface delay dan 66 booster. Material hasil peledakan digali dengan 1 unit excavator Komatsu PC300 untuk dimuat ke truk Hino FM260JD sebanyak 2 unit. Untuk kegiatan penunjang penambangan di butuhkan 1 unit Wheel Loader dan Buldozer. Crusher yang digunakan adalah jaw crusher type PE-750x1060 sebagai primary crushing dan cone crusher type PYFB 1321 STD M sebagai secondary crushing. Biaya pengeluaran yang dibutuhkan untuk memproduksi 7.815.383 ton batu split basalt adalah sebesar Rp272.468.571.040,02. Maka biaya produksi per tonnya adalah sebesar Rp34.863,11 per ton (di luar pajak pendapatan dan pajak bahan galian) atau Rp.71.928,05 (sudah termasuk pajak bahan galian dan pajak pendapatan). Berdasaran hasil analisis investasi, didapat nilai tiga parameter berikut; Net Present Value Rp128.769.327.542 Internal Rate of Return 162,8179% dan Payback Periode 0,6145 tahun. Dengan demikian dapat dinyatakan penambangan dan pengolahan bahan galian basalt secara teknis dan ekonomis layak untuk dilakukan.

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