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Journals Mining Engineering : Bina Tambang

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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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Articles 609 Documents

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Kajian Ekonomi Penambangan Batubara di PT. Indomining, Sanga-Sanga, Kutai Kartanegara, Kalimantan Timur pada Desain Penambangan Tahun 2018-2027 Sovi Mailadiniya; Rijal Abdullah
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Based on the coal price index issued by the global coal new castle index, coal prices experienced an increase in mid-2016, as of 2017 coal prices reached $80-100 per ton. To obtain profits, companies need to increase production targets by re-planning mining designs. Before changing the mining design, the total production target for overburden stripping was 87,077,536 bcm and coal production was 6,022.83.3. After a change in mining design, the production target increased, the total overburden production target was 212,815.00 bcm and the coal production target was 13,390.00 tons. In the re-planning of the mining design, it is necessary to assess economic feasibility by considering the need for excavators and transport equipment, production targets, and costs to be incurred during mining.In carrying out this research, the author combines theory with field data, so that both approaches are obtained from problem solving. The research method used in this th esis is a quantitative research method. This research is more directed to descriptive research, which is one type of research that aims to solve problems by collecting data, compiling, analyzing and interpreting it. Based on production targets and results of productivity studies, overburden stripping uses 8 units of Caterpillar 390D excavators and 36 units of Caterpillar 773E OHT. Coal mining uses 1 units of Hitachi ZX 470 excavators and 6 hino FM 260Ti dumptruck units. The total costs incurred during mining amounted to $966,405,923.28 and the total profits obtained were $81,178,110.72. The feasibility of the investment plan after the change in mining design obtained a positive NPV, IRR value of 43% and a payback period of 3,49 years. Keywords: Production Target, Equipment Needs, Costs, Benefits, NPV, IRR, Payback Period

RANCANGAN DESIGN TAMBANG TERBUKA JANGKA MENENGAH PADA TAMBANG BATUBARA DI WILAYAH TOWNSITE PT.BUKIT ASAM (PERSERO) TBK, TANJUNG ENIM, SUMATERA SELATAN Diah Wulandari; Dedi Yulhendra; Adree Octova
Journals Mining Engineering : Bina Tambang Vol 2, No 1 (2015): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

PT Bukit Asam (Persero), Tbk is one of STATE-OWNED company engaged in the coal. Referring to Government Regulation No. 70 of 2009 about energy conservation management has to be planned with and integrated in order to preserve domestic energy resources as well as increasing efficiency in its use. In order to support the energy conservation policy, PT Bukit Asam (Persero) Tbk do optimization of final mining Pit. In an attempt to optimization of Mine Air Laya mine area expansion required water laya to optimize an existing backup.Therefore, PT Bukit Asam (Persero), Tbk is planning an expansion of the mine in the Townsite and plan long-term long-term planning will be made next his secondary.This research was conducted to find out the design of the mine, the mining sequence, scheduling production, mining costs and tool needs. Final does is analyze the quarerly planning of open mines and mine feasibility in terms of economical.Topographic data, the contour of the spreading of coal and mine design that had been planned for 5 years with a target of mining production 4.000.000 ton/year. Transport equipment and tools fit in the first year until the fifth year of the appropriate stable using 4 eksavator Pc 400 and nine truck Scania P30 with a capacity of 30 tons. While, mine made access roads with a width of 15 meters based on the widest transport tool. There is a disposal area that can accommodate 124.918.226 bcm of overburden and interburden. Based on the use of mining equipment, equipment investment of $ 26.870.826 and net income of the proceeds of $ 187.616.010. It can be concluded that the medium-term in the area of mining Townsite deserves to be mined and meet production targets set.

Analisis Regresi Multivariat Parameter Hambatan Produktivitas Crushing Plant Dalam Upaya Peningkatan Target Produksi Tambang Emas PT J Resources Bolaang Mongondow Site Bakan Sulawesi Utara Afrinal Afrinal; Mulya Gusman
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Material processing is one of a very important stage in mining activities. In the processing of the material generally is the reduction of the size of the materials/rocks (comminution) by using the tool crushing. Crushing process should be done gradually because of limited ability to reduce the size of the tool material. Case study research conducted in the area of crushing plant PT J Resources Bolaang Mongondow. The research data consists of working time, idle time, delay time, breakdown and data excavator bucket. From the data analysis that is done then the obtained time total working time line 1 was 32.23 hours, line 2 that is 139.30 hours, line 3 of the 154.03 hours and line 4 with 154.71 hours. With a total barrier line 1 for each of the idle time 253.34 hours, delay time, 42.74 hours and breakdown 31.69 hours. Total line resistance 2 is the idle time 139.30 hours, delay time 75.45 hours and breakdown 24.55 hours. Total resistance line 3 that is idle time 55.01 hours, delay time 68.55 hours and breakdown 82.41 hours. While the total resistance line 4 with the idle time of 53.59 hours, delay time 78.04 hours and breakdown 73.66 hours.Keywords: Multivariat, Productivity, Idle Time, Delay Time, Breakdown

Karakterisasi Massa Batuan dan Analisis Kestabilan Lereng Untuk Evaluasi Geometri Lereng di Pit Barat Tambang Terbuka PT. AICJ (Allied Indo Coal Jaya) Kota Sawahlunto Provinsi Sumatera Barat Riski Adelina Pane; Yoszi Mingsi Anaperta
Journals Mining Engineering : Bina Tambang Vol 4, No 3 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract.The stability of the mine slope is the most important factor that must be considered in the continuation of mining activities. Research sites on three mining slopes PT. AICJ, namely coordinates S00˚36'09.3”/E100˚48'16.3", coordinates S00˚43'27.0"/E100˚47'11,1" with slope height = 35m and slope = 63˚, and at coordinates S00˚36'09.7"/E100˚48'16.2" with slope height = 30m and slope = 63˚. The method used is Bishop and Hoek and Bray. As a result of research, the following conclusions are drawn. First, based on the analysis of RQD, RMR, and SMR rock types on location classified in the class fair rock-good rock. Second, the results of the analysis of single and overall slope of actual earned value FK at the coordinates I, II, and III = 1.280/1.225, 1.323/1.203, 1.308/1.203(natural conditions) and FK = 0.844, 0.905, 0.859(saturated condition). Third, to obtain a safe FK that is 1.25, the geometry of the slope is modified, namely coordinate with a slope height of 31 m and slope 49˚, coordinate II slope height 33 m and slope 50˚, and coordinate III of slope height of 25 m and slope 54˚ in saturated condition.Keywords :slope stability analysis,RQD, RMR, SMR, bishop method, hoek and bray method

ANALISIS KESTABILAN LERENG UNTUK SISTEM PENAMBANGAN OVERBURDEN (SOIL) DI AREA IUP 412 HA BUKIT TAJARANG INDARUNG PT. SEMEN PADANG SUMATERA BARAT Oktaviana Saputri; Bambang Heriyadi; Yoszi Mingsi Anaperta
Journals Mining Engineering : Bina Tambang Vol 3, No 1 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Sehubungan dengan sistem penambangan pada lereng overburden (soil) diarea 412 Bukit Tajarang, maka perlu dilakukan kajian geoteknik untuk menilai apakah penambangan masih memungkinkan untuk dilanjutkan pada saat kondisi normal dan mengetahui seberapa besar batasan FK minimum lereng pada kondisi jenuh yang harus ditinggalkan oleh perusahaan, dan kembali produksi setelah lereng runtuh akibat stabilitas lereng saat hujan, yang mana akan digali oleh alat berat excavator. Sebagai upaya mendapatkan nilai faktor keamanan yang aman yaitu (FK>1.3) pada kondisi kering, dilakukan kajian analisis kestabilan pada dinding lereng daerah soil dengan kondisi lereng dalam keadaan stabil setelah dilakukan proses penambangan lanjutan. Kestabilan lereng pada pembahasan ini dianalisis menggunakan metode kesetimbangan batas BishopSimplied. Analisis kestabilan dilakukan untuk mengetahui seberapa besar potensi longsoran kedepan yang akan terjadi jika masih tetap dilakukan aktifitas penambangan pada area 412 Ha. Parameter properties material akan digunakan sebagai data masukan untuk pengoptimalan kestabilan lereng yang berpotensi terjadinya longsor. Sebagai hasil pembahasan, dapat disimpulkan beberapa hal berikut. Pertama, material pada lokasi penelitian tergolong sebagai material lunak, lemah, atau rapuh, sehingga bentuk longsoran yang terjadi adalah longsoran busur. Material juga dapat digali tanpa menggunakan peledakan. Kedua, parameter properties material yang berpotensi longsor yaitu soil: Berat isi tanah pada koordinat A, B, dan C adalah ()= 1.33gram/cm2, 2.02gram/cm3, dan 2.04gram/cm3. Berat isi kering adalah (d)= 1.104gram/cm3, 1.418gram/cm2 dan 1.552gram/cm2. Kohesi adalah (c)= 53.497 KN/m2, 50.300 KN/m2, 69.296 KN/m2. Dan Sudut geser dalam adalah (ϕ)= 25.01˚, 20.97˚ dan 17.57˚. Analisis lereng tunggal secara keseluruhan pada koordinat A dengan ketinggian 14 meter dan sudut 43˚, B dengan ketinggian 21 dan sudut 78˚, C dengan ketinggian 28˚ dan sudut 78˚. Hasil dari analisis nilai actual lerengyang dilakukan didapatkan nilai faktor keamanan pada koordinat A, B dan C dengan nilai FK dalam kondisi jenuh, setengah jenuh , dan kering adalah 1.732, Setengah jenuh 2.378 dan kering 2.711. Koordinat B dengan nilai FK dalam kondisi jenuh 0.949, setengah jenuh 1.081 dan kering 1.062. Pada koordinat C dengan nilai FK dalam kondisi jenuh 1.064, setengah jenuh 1.158 dan kering 1.164.

Pengendalian Waktu Efektif Bulldozer CAT D8R Rental Untuk Meminimalisasi Biaya Operasional Di PT Bukit Asam Tbk Unit Pelabuhan Tarahan Bandar Lampung Ronaldo Davinci; Dedi Yulhendra
Journals Mining Engineering : Bina Tambang Vol 4, No 1 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

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

Analisis Statistik Untuk Mendapatkan Waktu Optimal Dari Losstime Dalam Memenuhi Produksi Penambangan Batubara Di Area Pit Timur PT. Artamulia Tatapratama Rukia Pinda Sari; Murad Murad; Adree Octova
Journals Mining Engineering : Bina Tambang Vol 3, No 3 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Based on data of coal production at PT. Artamulia Tatapratama (ATP) from January to May 2017. The coal production target was not reached in February-May 2017, while coal production in January 2017 was achieved. This is caused by several constraints in coal production activities, because of these constraints cause effective working hours at PT. ATP is reduced. From this problem, it is necessary to analyze the optimal time from losstime to reach the established coal production plan. To get the optimal time in achieving the production plan is done by multiple linear regression analysis, the results obtained from this analysis is the maximum limit of the time losstime, and to determine the optimal time of losstime is using simulation of linear equation regression. The optimal timing of the digging equipment in achieving the daily production of coal based on the results of the simulation of statistical analysis when idle time of 3 units of unloading equipment operates for 7.67 hours, the delay time allowed from the equipment is 12.99 hours, while if the delay time is 14.78 hours, the idle time allowed only 6.03. After knowing the problem causing decrease of working time of digging and unloading equipment (losstime), it is necessary to improve corrective action to be applied in the field.Keywords: Production, Losstime, Statistical Analysis, Optimal Time, Coal Mining

Evaluasi Penerapan Keselamatan Dan Kesehatan Kerja Tambang Bawah Tanah Dalam Penggunaan Alat Pelindung Diri (APD) Guna Meningkatkan Mutu Keselamatan Kerja Pada Area Penambangan Batubara Lokasi CBP PT. CAHAYA BUMI PERDANA Heri Prabowo; Alfa Candra Yarsila
Journals Mining Engineering : Bina Tambang Vol 4, No 1 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

PT. Cahaya Bumi Perdana is a company engaged in underground coal mines. Underground mining has a great potential danger This potential hazard that causes underground mining is more frequent accidents, such as methane gas explosions. In addition, since the commencement of the operation of this underground coal mine in 2016 there have been several accidents which have been caused by human error (human errors) such as incomplete use of personal protective equipment (PPE). Therefore, it is necessary to evaluate occupational health and safety in use of PPE. This work health and safety evaluation aims to improve the quality or quality of work safety and reduce the number of accidents that occur. This evaluation includes: work safety system, company policy, equipment for Operational Procedure (SOP).Based on the observations of the authors in the field, there are still workers who ignore PPE (Personal Protective Equipment), such as not using a helmet (safety helmet), shoes (safety shoes), mask (respirator), glasses, gloves, ear plug, not wearing clothes while working, and lack of awareness of the consequences of the accident for yourself, the company, and the environment. The results of this evaluation activity will provide a solution to improve the quality of work safety in underground mines, which is to motivate workers to always comply with all established regulations, always be careful in working and always prioritize occupational safety and health. Efforts that can be done by the company to improve the quality / quality of occupational health and safety (K3) such as, conduct K3 training, conduct control and analysis of job performance, and place the position of employees or workers in the right position. This will improve work performance and improve the quality of health and safety of workers. With the results of this evaluation is expected to reduce the number of accidents that occur.Keywords : personal protective equipment, standard operational procedure, k3

Estimasi Kebutuhan Peralatan Tambang Batubara Untuk Mencapai Target Produksi Pada Tahun 2017 Pt. Partner Resource Indonesia Jobsite Sungai Lilin, Provinsi Sumatera Selatan Yonal Ferdian; Ansosry Ansosry
Journals Mining Engineering : Bina Tambang Vol 3, No 3 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Pit yudistira which has value of stripping ratio 1:5.6 is still economical enough to be mined. Considering that of coal is expensive enough this year.To achieve the production target in 2017 of Partner Resource Indonesia company amount 4.020.000bcm overburden it is needed Dig load equipment amount 3 unit of excavator and amount 11 unit of, and amount 708.000 ton of coal it is needed Dig load dumptruck equipment amount 2 unit excavator and 5 unit dumptruck.The level of achievement of production target in 2017 from mechanical equipment which is working to strip the overburden amount 99,32% for excavator and 104,6% for dumptruck with the deficiency of production amount 27416,5 bcm, for demolition of coal amount 103,77% for excavator and 98,34% for dumptruck with the deficiency of production amount 11757,6 ton.To fullfil the deficiency of production target overburden amount 27416,5 bcm in 2017, it should have to added 1 unit of excavator PC by working hours during 288,11 hours. For the amount 111757,6 ton, so it should be added 2 units dumptruck Hino FM 260 by working hours during 201,5 hours. Keywords: Coal’s mine, overburden, production target, dump truck, excavator.

Analisis Geometri Peledakan Guna Mendapatkan Fragmentasi Batuan yang Diinginkan untuk Mencapai Target Produktivitas Alat Gali Muat Pada Kegiatan Pembongkaran Lapisan Tanah Penutup (Overburden) di Pit Menara Utara, PT. Arkananta Apta Pratista Job Site PT.KPUC, Malinau, Kalimantan Utara Sahrul Ramadana; Raimon Kopa
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Overburden digging process at North Tower Pit was carried out by blasting. The results of the observation from the actual blasting geometry carried out by the company in blasting activities, it produces blasting fragmentation which boulder size is ±25%, the effect is diggability of the digging tool is not maximum and productivity target of the tool at 800bcm/hour can not be achieved. This study aims to optimize blasting geometry to minimize the number of boulder so that the loading activities become more effective and productivity target can be achieved. The research method is carried out by giving blasting geometry recomendation based on R.L.Ash and ICI Explossives theories and it is done on the both applications which is carried out in the field so that it get the optimum blast plan. Based on the results of the both applications of blasting geometric plans, it is recommended that the geometry plan of blasting is burden: 5.3m, space: 8.5m, stemming: 4,6m, subdrilling: 1m, bench height: 8m, the depth of explosive hole: 9m, powder colomn: 4.4m, and powder factor: 0.33kg/bcm where the boulder of size fragmentation which is produced 10.82%, digging time is 10.76 seconds, bucket fill factor is 64.56%, and the productivity of the digging tool is 865.44bcm/hour.Keywords: Blasting Geometry, Blasting Fragmentation, Digging Time, Bucket Fill Factor, Productivity of Digging Tool

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