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Sumarya, Sumarya
Jurusan Teknik Pertambangan FT UNP

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PEMBUATAN PROGRAM HITUNG PRODUKSI MENGGUNAKAN BAHASA PEMOGRAMAN VISUAL BASIC .NET UNTUK MENGEVALUASI PRODUKTIVITAS ALAT MUAT DAN ALAT ANGKUT PADA KEGIATAN PENAMBANGAN BATU GAMPING PT. SEMEN PADANG Idham, Ikhwan; Sumarya, Sumarya; Octova, Adree
Bina Tambang Vol 3, No 1 (2018): Jurnal Bina Tambang
Publisher : Jurusan Teknik Pertambangan FT UNP

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Increased in cement demand for development has made PT. Semen Padang increased its cement production. Increased cement demand means increased demand for limestone as a base material for manufacturing cement. Based on data from PT. Semen Padang, the limestone mining production target in August 2016 was 718,000 tons, while the realization of the production 580,000 tons or about 81% of the production target. To determine the productivity of the loading and hauling equipment it is necessary to do some calculation phases. Up to this time, if the process of calculating the productivity of the equipement is done manually, it will take a long time and less practical. And it is expected that a program that can help with the productivity calculation process.Production calculation program is programmed using visual basic programming language. This program can be used to calculate the productivity of loading and hauling equipment. After the analysis and calculation done with the program, improving the productivity of the equipment must be done. To improve the productivity of the equipment, an improvement in the work efficiency of the equipment and the bucket fill factor excavator was made.Calculation results using the program, for the productivity of the loading equipment after the improvement the productivity of dump truck Komatsu HD 785 with Hitachi EX 2500-6 excavator is 721,179.27 tons /month. The calculation results using the program with the manual is not much different. The difference result of the calculation is caused by integrating the numbers behind the comma
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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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.
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
Publisher : Jurusan Teknik Pertambangan FT UNP

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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%.
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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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.
Evaluasi Pengaruh Geometri Jalan Angkut Terhadap Produktivitas Dump Truck Mitsubishi Fuso 220 PS dari Front Penambangan Menuju Unit Crusher pada Penambangan Batu Andesit PT Koto Alam Sejahtera Maharani, Fadhilah; Sumarya, Sumarya
Bina Tambang Vol 3, No 4 (2018): JURNAL BINA TAMBANG
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Abstract. PT Koto Alam Sejahtera located in Nagari Koto Alam, Pangkalan Koto Baru Subdistrict, Lima Puluh Kota District, West Sumatra Province. The production target of    PT Koto Alam Sejahtera is 30.000 tons / month, meanwhile the actual production is 16.965,6 tons / month. Based on observations, the road grade is still high, no cross slope is visible and two conveyances cant’t pass at the same time because the width on the road is narrow.This type of research is applied research by combining theory and field data to solve problems. The actual road width ranged is from 6,35-12,15 meters while theoretically is 9 meters. The actual bend road width ranges is from 6,20-12,70 meters while theoretically is 12 meters. Actual road grades range from 3,49%-19,44% while the ideal road grade is 8%. The cross slope value for the 9 meter road width is 0,04 and the height difference is 18 cm. The superelevation value for the 12 meter bend width is 0,04 and the height difference is 48 cm.There were 7 straight road width segments that needed to be added and 2 bend road width segments, and there are 8 segments that need to be downgraded. Productivity of Mitsubishi Fuso 220 PS with actual conditions of 16.965,6 tons / month. The estimated increase in the productivity of Mitsubishi Fuso 220 PS after an evaluation is 27.593,89. Theoretical productivity of Mitsubishi Fuso 220 PS after the improvement of work efficiency is 34.395,3 tons / month.Keywords:  Road Geometry, Production, Dump Truck, Work Efficiency, Cross Slope
Evaluasi Biaya Dan Kebutuhan Alat Angkut Dan Alat Muat Pengupasan Lapisan Tanah Penutup (Overburden) Pit B PT. Bina Bara Sejahtera Kecamatan Ulok Kupai, Kabupaten Bengkulu Utara, Provinsi Bengkulu Isgianda, Fachrur; Sumarya, Sumarya; Prabowo, Heri
Bina Tambang Vol 3, No 3 (2018): JURNAL BINA TAMBANG
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PT. Bina Bara Sejahtera targets overburden demolition of 175.000 bcm/month, but all that has not been achieved. Efforts to achieve the production target of overburden from the work of mechanical devices is to calculate the actual work efficiency and increase the efficiency of mechanical work. Actual work efficiency Komatsu PC300 Excavators that work on fleet 1 53,91%, fleet 2 52,22%, fleet 3 50,53% and fleet 4 51,47%, Volvo BMA35C ADT on fleet 1 55,15%, fleet 2 50,81%, fleet 3 50,36% and fleet 4 is 52,08%. Work efficiency after increasing efficiency Komatsu PC300 Excavators that work on fleet 1 67,97%, fleet 2 67,22, fleet 3 64,47% and fleet 4 66,47%. Volvo BMA35C ADT on fleet 1 74,91%, fleet 2 67,22%, fleet 3 64,47% and fleet 4 66,47%. Actual production on the dismantling of fleet 1 overburden 28.944.24 bcm/month, fleet 2 28.449.67 bcm/month, fleet 3 22.955.50 bcm/month and fleet 4 36.844.61 bcm/month, after increasing work efficiency dismantling fleet overburden 1 53.402 bcm/month, fleet 2 52.168.92 bcm/month, fleet 3 40.365,49 bcm/month and fleet 4 60.548.61 bcm/month. Operating cost of disassembling operations for Volvo BMA35C Komatsu PC300 and ADT Excavator overburden Rp.2.317.249.728. Operating cost after increasing work efficiency Rp.3.019.797.720. The actual overburden per Bcm fee is Rp.19.772/bcm after evaluation Rp. 16.125/bcmKeywords: Cycle Time,Stripping Overburden, Cost of overburden, work efficiency
STUDI ANALISIS DAN SIMULASI PENINGKATAN PRODUKTIVITAS EXCAVATOR HITACHI EX1900-6 DALAM PENGUPASAN OVERBURDEN PADA TAMBANG BATUBARA PT. MANDALA KARYA PRIMA JOBSITE PT. MANDIRI INTIPERKASA PROVINSI KALIMANTAN UTARA Siregar, Amrina Aulia; Sumarya, Sumarya
Bina Tambang Vol 3, No 4 (2018): JURNAL BINA TAMBANG
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Abstract. PT. Mandala Karya Prima is a mining contractor trusted by PT. Mandiri Intiperkasa for coal mining activities. In the overburden dismantling process, PT. Mandala Karya Prima uses the Hitachi EX-1900-6 excavator with a 12 m3 bucket capacity. This research was motivated by the planned overburden dismantling activity using Hitachi EX1900-6 excavators of 600 bcm / hour not reaching the target. The actual productivity of Hitachi EX1900-6 excavators for wet clay material is 556.8 lcm / hour and for sandstone material is 548.9 lcm / hour.Components that influence the productivity of excavators include material types, front loading conditions, loading methods, and skill operators. These components make work efficiency, bucket fill factor and cycle time not optimal. The actual time cycle when collecting data in the field is 38.63 seconds for clay wet material and 31.64 for sandstone material. By taking the example of cycle time, the clay wet material is 38.63 seconds, the digging rate should be 812.78 lcm / hour. But the reality in the field, the productivity of overburden dismantling of wet clay material is 556.8 lcm / hour. This loss of productivity occurs due to obstacles namely moving the front, repairing fronts, waiting hauler, spotting time, preparing position, and operator needs. Of these obstacles, the biggest contributor to loss of productivity is the waiting hauler which is ± 150 lcm / hour.Based on the theoretical formula of excavator productivity, factors that can be improved to optimize excavator productivity are work efficiency, bucket fill factor and cycle time. Efforts were made to improve work efficiency, namely dumptruck optimization, equipment management, changing loading patterns, and spotting dumptruck without maneuvering. Efforts are made to reduce cycle time, namely changing the digging pattern and making the optimum bench height. While the effort made to increase bucket fill factor is applying the right excavation technique.Keywords:  Productivity, Excavator, Cycle Time, Bucket Fill Factor,  Job Efficiency.
ANALISIS INVESTASI PENGADAAN ALAT BERAT DI PT. KARBINDO ABESYAPRADHI DENGAN METODE NPV DAN IRR Zakri, Rizto Salia; MS, Murad; Sumarya, Sumarya
Bina Tambang Vol 1, No 2 (2014): Jurnal Bina Tambang
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Abstract This research start from the condition in the field in PT. Karbindo Abesyapradhi, where the heavy equipment damage to often, it make production target never reach.   To reach the target, is important to buy some new heavy equipment, but it can make some problem about the cost of investment. There are 3 option to buy some new heavy equipment, one of the option will be a best option and can make the company get profit. For this problem the writer make this research, to know the best alternative to the company.In this research the writer use quantitative research method and also use descriptive method. From this reseach we will know comparation from each option. Sample will represent all of heavy equipment of PT. Karbindo Abesyapradhi have.Based on this research, we know that buy a new heavy equipment cash is the best option for the company, where the company will get benefit from this option. This result become from trial with Net Present Value method, where the cash option get the higgest NPV value, while when we test with Internal Rate of Return after pass the incremental analitysis produce the result that the cash option be a best option and have the most benefit for the company and it can apply for all kind of heavy equipment in PT. Karbindo Abesyapradhi. Kata kunci : Investment, Heavy Equipment, NPV, IRR, Incremental Analysis 
Evaluasi Pengaruh Geometri Jalan Angkut Terhadap Produktivitas Dump Truck pada Pengangkutan Batubara dari Loading Point ke Stockpile di Site Ampelu PT. Nan Riang Kecamatan Muara Tembesi Kabupaten Batanghari Provinsi Jambi Oktafian, Nanda; Sumarya, Sumarya
Bina Tambang Vol 3, No 4 (2018): JURNAL BINA TAMBANG
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Abstract. PT. Nan Riang is a coal mining company located in Kecamatan Muara Tembesi, Kabupaten Batanghari, Provinsi Jambi. The daily coal production target is 2,000 tons / day, while the actual production is 1,216,148 tons / day. One of the factors that affect the non-achievement of production targets is the condition of the haul road. Based on observations in the field, the general condition of the haul road was bumpy and there were many materials scattered about and when they passed there were transport equipment which had to stop due to the narrow road. Based on geometric measurements of the actual haul road, the actual road width was between 8.4-18.79 meters while the theoretical width of the straight road was 12 meters. The actual bend road width ranges from 10.44-19.21 meters while theoretically the bend road width is 17 meters. The actual grade of road starts from 1.20% to 15.32% while the ideal road grade is 8%. The actual cross slope ranges from 0-131 mm / m. The cross slope value for a 12 meter road width is 0.04 and a height difference of 24 cm. The superelevation value for the 17 meter bend width is 0.05 and the height difference is 85 cm. After being evaluated, there were 2 straight road width segments that needed to be added in width, namely BC and CD segments and 3 bend road width segments, namely AB, FG, and HI segments, as well as decreasing grades in BC segment and EF Productivity of dump truck CWM 330 PS with conditions Actual amounted to 1,216,148 tons / day. Productivity of dump trucks CWM 330 PS after improvements in work efficiency are 1,884.02 tons / day. Theoretical productivity of dump truck CWM 330 PS after improvement in work efficiency and ideal road geometry is 2,246.12 tons / day.Keywords:  Cycle Time, Road Geometry, Coal, Production, Work Efficiency.
Analisis Teknik Kebutuhaan Alat Gali Muat dan Alat Angkut Menggunakan Simulasi Teori Antrian Pada Produksi Batu Kapur Area Eksisting 206 PT Semen Padang (Persero) TBK. Sentosa, Hari; Sumarya, Sumarya; Anaperta, Yoszi Mingsi
Bina Tambang Vol 3, No 4 (2018): JURNAL BINA TAMBANG
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Abstract. PT. Semen Padang owned by the unions, located at Indarung Padang,West Sumatera The hour barriers based on report operations tool tools digging and hauling of period may 2017 PT Semen Padang. that is, digger  tool  7,15 hours and hauler tools 7,46. Based on the study of the hour 4,2 hours. PT. Semen Padang Target of production and realization at a Eksisitng 206 may 2017 year the target of 320 Ton/hour for 1 unit of dump trucks, based on the analysis of the realized 282,31 Tons/hour, while based on the study of the production of obtained 363,58 tons/hour. Based on observations in field, conditions of work and the front area dumping still experiencing queue. The availability of tools and tool unloading hauler at a area 206 existing excavators serve the 6 units of dump trucks. Match factor of actual field is 1,18. Based on a review of the results of the productivity gained 1 unit excavators serve the 5 units of dump trucks and based on the theory of queues device used tool transport 5 units of dump trucks. As for the correction factor in the match after having examined 0,99 or close to 1.Keywords: Abstract. PT. Semen Padang owned by the unions, located at Indarung Padang,West Sumatera The hour barriers based on report operations tool tools digging and hauling of period may 2017 PT Semen Padang. that is, digger  tool  7,15 hours and hauler tools 7,46. Based on the study of the hour 4,2 hours. PT. Semen Padang Target of production and realization at a Eksisitng 206 may 2017 year the target of 320 Ton/hour for 1 unit of dump trucks, based on the analysis of the realized 282,31 Tons/hour, while based on the study of the production of obtained 363,58 tons/hour. Based on observations in field, conditions of work and the front area dumping still experiencing queue. The availability of tools and tool unloading hauler at a area 206 existing excavators serve the 6 units of dump trucks. Match factor of actual field is 1,18. Based on a review of the results of the productivity gained 1 unit excavators serve the 5 units of dump trucks and based on the theory of queues device used tool transport 5 units of dump trucks. As for the correction factor in the match after having examined 0,99 or close to 1.Keywords:  Digging and hauling; Hour barriers; Production; Match Factor; Queue