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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 Rock Factor Dan Pengaruh Powder Factor Terhadap Fragmentasi Pada Batuan Limestone Di Bukit Karang Putih Pt. Semen Padang (Persero) Harifan Prima; Dedi Yulhendra; Rijal Abdullah
Journals Mining Engineering : Bina Tambang Vol 3, No 1 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

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 Balik Kestabilan Lereng Penampang A Dan Penampang B Area Lowwall Tambang Batubara Pada Pit X PT. Kideco Jaya Agung Kecamatan Batu Sopang Kabupaten Paser Provinsi Kalimantan Timur Suryadi Putra; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 4, No 1 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. PT. Kideco Jaya Agung is a coal mine company in Paser Regency, East Kalimantan Province, with an Open Pit Mining method. Spreading cover rock is done by blasting. Blasting activities affect the slope of stability. In May 2018 there was a landslide in the A section lowwall area while cross section B in July 2018 occurred overcut to the design in 2018. In order to be able to provide the results of the analysis, several processes carried out were the calculation of blasting vibrations using the Matsuo reference formula. Then the back analysis using the probabilistic method of Monte Carlo. As well as analysis of safety factors and recommendations for slope geometry using janbu simplified method. The results of the analysis are (1) The relationship of the distance of blasting to Amaks produced is Amaks = -6 x 10-5 (distance) + 0.0416. (2) The geotechnical parameter of the back analysis is mudstone: c = 77,5 kN /m2 and Ф = 17,36; coal: c = 72,54 kN /m2 and Ф = 17,112. (3) Design of FK values in 2018 cross section A lowwall is 1,169 and crosswall B design 2018 FK design value is 1,365. (4) Recommendation of lowwall cross section A geometry with overall slope of 14o and make the width of the bench at an elevation of 65 mdpl above 30 meters.Keywords : Blasting, Back analysis, Monte carlo, Janbu simplified, Recommendations geometry of lowwall.

Analisa Kestabilan Lereng Studi Kasus Kelongsoran Ruas Jalan Mandeh-Sungai Nyalo Kecamatan Koto Xl Tarusan, Kabupaten Pesisir Selatan Sahmijar Sahmijar; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 4, No 2 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. To design safe slope, using Bishop Method and it helped Geostudio application. physical properties parameter (weight of content, specific gravity, the water level) and mechanics (cohesion and shear angle). The analysis of safe slope was based on the value of safety factor, based on Bowles the value of safety factor >1,25. There were 2 layers in the slope, in the first layer the value of shear angle 21,80 showed clay soil and in the second layer the value of shear angle 31,660 showed sandy clay soil. The result of safety factor using Geostudio application in the condition of natural soil was gotten the value of safety factor 1,388 showed that safe slope and in the saturated condition was gotten safety factor 1,046 it meaned the slope was in critical condition. Recommendation of safe slope design used decreasing sideways slope method, it consist of 4 bench. In the top bench the height was 5m and the sideways a was 45° and it was gotten safety factor =1,692 , in the second bench the height was 4m and the sidewayas was 45° and it was gotten safety factor = 1,333, in the third bench the height was 5 m and the sideways was 45° and it was gotten safety factor =1,294 , and in the last bench the height was 5m and the sideways was 45°, the result of overall was gotten safety factor = 1,288, based on Bowles (2000) the safety factor was safeKeywords: Bishop method, geostudio, water level, cohesion, safety factor

Analisis Metode Penggalian Batuan Berdasarkan Kriteria Indeks Kekuatan Batu (Franklin) di Site Penambangan Batu DolomitePT. Bakapindo, Jorong Durian, Nagari Kamang Mudiak, Kecamatan Kamang Magek, Kabupaten Agam, Provinsi Sumatera Barat Wahyu Kurniawan; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 3, No 3 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

PT.Bakapindo is engaged in dolomite mining. The mining method applied is the Open Pit quarry method. Currently the mining process is carried out by PT. Bakapindo applies the blasting method to release dolomite rock from its parent rock. In determining the right method for dismantling material, it is necessary to study rock capability. In this study, the method applied to determine the suitable excavation method is by Franklin's rock strength index criteria chart. The data used in the study are discontinuity field conditions taken with the scanline system and rock samples used to test rock strength by means of Point Load Index. Total data on discontinuity field conditions measured in rock mass is 201 data. The results of the point load index test obtained the Franklin (Is) average index value of 4.740MPa. Based on the results of the analysis of rock mass conditions at PT. Bakapindo found that rock mass rating (RMR) of 67 was classified as class II (Good rock), the fracture index value was 0.091m. Based on Franklin's rock strength index criteria graph, it can be concluded that suitable excavation methods are carried out at PT. Bakapindo is byblasting cracks.Keywords: mining method, Index Franklin, rock mass rating (RMR) , Discontinuiy, Point Load Index

Kajian Laju Infiltrasi Pada DAS Air Timbalun Kota Padang Ditinjau Dari Perbedaan Lithology, Kemiringan Lahan, dan Parameter Fisik Tanah Ahmad Fauzan; Rusli HAR
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Infilration that is disturbed in an area will affect the existing hydrological cycle and make the natural balance not met. The construction and opening of new land has led to a diversion of land use which was originally a water catchment area, so that the water catchment area was reduced, causing flooding in residential areas. Infiltration is also influenced by several factors including rock lithology conditions, land slope and soil physical condition. Therefore, it is necessary to study the infiltration rate, infiltration zoning mapping, and the calculation of water discharge that can be applied to the soil. This research was carried out at 15 different points. The data obtained are primary data which is direct observation in the field, namely the coordinates of the study location, groundwater data, lithology, land slope, soil physical properties (water content, porosity, saturated hydraulic conductivity, soil density), and infiltration rate measurement data. Based on data processing using the Kostiakov method, the average infiltration rate of the study area was 0.010565 cm/min, including the very low absorption area classification (<0.1-0.2 cm/min). based on statistical analysis, rock lithology conditions, land slope and soil physical properties are very influential on the rate of infiltration. Infiltration zoning mapping was divided into 6 zones, with the lowest infiltration rate 0.000017093-0.002509782 cm/minute and the highest infiltration rate zone 0.022775581-0.046821598 cm /minute. In addition, the water discharge that can be absorbed by the soil in the study area with an area of 14,199 km2 is 6,600 m3/hour/km2 (very low). Keywords: Infiltration Rate and Infiltration Zone , Kostiakov Method, Rocks Lithology, Land Slope, Soil Physical Characterist

Perencanaan Sistem Penyaliran Tambang Batubara PT. Rajawali Internusa Jobsite PT. Indah Jaya Abadi Pratama, Lahat, Sumatera Selatan Dimas Andrianto; Tamrin Kasim
Journals Mining Engineering : Bina Tambang Vol 4, No 3 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

High rainfall at the planned mine site can hamper mining operations in achieving the production target of 500,000 MT / year. Planning of a mine drainage system is needed which is well reviewed technically and also the costs arising from the making of the mine drainage system. Analysis of daily rainfall data in research locations in 2008-2017 by using the gumbel distribution, obtained planned rainfall of 105.09 mm / day for the 2-year return period. Based on the results of the study, it was found that runoff discharge entering the mine was 7092 m3 / hour. The incoming water is accumulated into the sump which is then pumped out towards the open channel. Based on the total pump head of 100,824 and the ideal pumping capability, the type of pump used is Multiflo MF-420 with the recommended operating speed of 1300 RPM resulting in a discharge of 1000 m3 / hour. The dimensions of the open channel that will be used are in the form of trapezium because it is easier to make and maintain. Settling pond that will be made in zigzag shape with a length of 75 m, width of 35 m and depth of 5 m. The total cost that must be budgeted for in making sump, open channel and settling pond is Rp. 1,106,257,200. Keywords: Production,Rainfall,drainage,Pump,Budgeted

ANALISIS FLEKSIBILITAS EKONOMI MENGGUNAKAN BLACK-SCHOLES-MERTON FORMULA PADA PROYEK TAMBANG BIJIH BESI Elgi Alam Pangestu; Muhammad Giatman; Murad Murad
Journals Mining Engineering : Bina Tambang Vol 3, No 1 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

The intangible factors in iron ore mining project can be calculated quantitively by using Black-Scholes-Merton Formula. Based on calculation results, NPV value using Discounted Cash Flow (DCF) is obtained that amount Rp. 384.410.329.525. The parameters of Black-Scholes-Merton (BSM) Formula has value amount: Volatility of Commodity Price (σ2)=4,5%, Risk Free Rate (r)=7,61%, Value of Underlying Asset (S)=Rp. 493.178.856.998,86, Capital Budget (K)=Rp. 16.213.165.807, and Loss of Opportunities (γ)=3,28%. So that the value of eNPV is Rp. 539.768.362.897,60 with Option Value (C) amount Rp. 155.358.033.372,49. Sensitivity analysis shows that Option Value (C) is directly proportional to the increment of Value of Underlying Asset (S) and Risk Free Rate (r). Meanwhile the Option Value (C) is inversely proportional to Capital Budget (K), Loss of Opportunities (γ), and Project Time Period (t). The increment Volatility of Commodity Price does not influence Option Value (C).

Evaluasi Produksi Alat Gali Muat dan Alat Angkut sebagai Upaya Pencapaian Target Produksi Clay Area 242 PT. Semen Padang Ihsanul Rifki; Yoszi Mingsi Anaperta
Journals Mining Engineering : Bina Tambang Vol 3, No 3 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Clay mining PT. Semen Padang from area 242 with target to 2000 ton/day uses a combination of 2 units of Kobelco SK 200 excavators and 16 units of HINO FM 260 Ti dump truck. The number of dump trucks active in a month an average of 10 units/day. Daily production target area of 242 is 2000 ton/day, while the range of daily production data ranges from 364.61 Ton - 1037.1 Ton. The low daily production that underlies the authors do this research. Efforts that can be made to efficiently achieve production targets of 2000 ton / day in 242 areas are a review of the equipment production capacity so that bulk when loading material from 14 to 16, swing angle improvement from 180o to 90o to reduce cycle time excavator, active dump truck 10/17 minimum to 15/17 units, effective time excavator repair from 34% to 74%, effective dump truck time from 50% to 75%.Keywords: Clay, Excavator, Dump truck, Production, Match Factor

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
Journals Mining Engineering : Bina Tambang Vol 3, No 2 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

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

Evaluasi Sistem Penyaliran Tambang di Pit Yarder Tambang Batubara PT. Kalimantan Prima Persada Jobsite BDMA Kecamatan Malinau Selatan Kabupaten Malinau Provinsi Kalimantan Utara El Harisaf Taufik; Tamrin Kasim
Journals Mining Engineering : Bina Tambang Vol 4, No 1 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. The water that goes to the location of the mining is largely derived from rainwater, which, at the time a high rainfall season cause the puddle on the mining front. Besides that the plan of the progress of the mine will cause in shifting mining front closer to the direction of sump. Because of that would require the re-planning for mine sump dimensions to keep mining activity running optimally. Beside that also required the calculation of pump, pipes, open channel dimension that is able to flow water to the KPL and KPL dimension itself. The rainfall plan processed using Gumbell Method. While the determination of the intensity of the rain with Monnonobe method that will be used to obtain discharge water runoff. So that it can be specified sump dimensions pump needs, open channels dimensions and KPL dimension. Catchment area in Yarder pit PT. Kalimantan Prima Persada Jobsite BDMA, as large as 65,57 hectares. Maximum capacity sump to collect water runoff and groundwater amounted to 116.254,23 m3. Pumping systems were performed using HDPE pipes and pumps used is a centrifugal pump Multiflow MF-420 EXHV, which has a maximum head 220 meter and pump discharge to a maximum of 430 liters / sec as a single unit. Results of pumping flowed into an open channel for later deposited on the mud settling ponds (KPL) with a maximum volume of 10.784 m3.Keywords: Sump, Pump, Open Channel, KPL, Catchment Area

Page 13 of 61 | Total Record : 609

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