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Ansosry Ansosry
Universitas Negeri Padang
Earth & Planetary Sciences

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UPGRADING COAL LOW QUALITY WITH DRYING PROCESS WITHOUT OXYGEN Joni Pradinata; Rijal Abdullah; Ansosry Ansosry
Bina Tambang Vol 3, No 1 (2018): Jurnal Bina Tambang
Publisher : Jurusan Teknik Pertambangan FT UNP

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Abstract

kcal/kg that accumulate in stockpile PT. Nusa Alam Lestari. The authorconducted a preliminary survey to determine the amount of low quality coal inPT. Nusa Alam Lestari. In February 2017 the number of coal with a calorie valuebelow 5100 kcal /kg - 5500 kcal / kg on the stockpile of seam stack at 10422 tonsof stockpile.Here are several kinds of coal upgrading process, one of them is dryingprocess. Coal Drying aims to remove or decrease the water content contained incoal, so that with reduced moisture content is able to increase the calorific valueof coal.In the process of upgrading with the drying process (Coal Drying)obtained coal calorific value by using Furnance Carbolite to influencetemperature and reaction time that is at 400⁰C for 1 hour produce coal withcalories 5,697,94 kkal / kg. At 400⁰C for 2 hours produces coal with a calorificvalue of 5,987.8 kcal kg. At 400⁰C for 3 hours produces coal with a calorificvalue of 6,182.70 kcal/kg. At 500⁰C for 1 hour produce coal with a calorific valueof 6,192.44 kcal/kg. At a temperature of 500⁰C for 2 hours yields a coal calorificvalue of 6,233.86 kcal / kg. At a temperature of 500⁰ for 3 hours yields a calorificvalue of 6,219.24 kcal / kg. At 600⁰C for 1 hour yields a calorific value of6,423.15 kcal/ kg. At 600⁰C for 2 hours 6,470.15 kcal/kg. At 600⁰C for 3 hoursyields a caloric value of 6,375.14 kcal/kg.In this research, the optimum caloric value obtained at drying process is600⁰C for 2 hours with decreasing water content 3,95%. In the drying process tothe effect of temperature and calorie reaction time rose from 5,457.99 kcal/kg to6,470.15 kcal/kg.
RANCANGAN DAN ANALISIS BIAYA SISTEM PENYALIRAN TAMBANG PIT TIMUR PT. ARTAMULIA TATAPRATAMA, KABUPATEN MUARO BUNGO, PROVINSI JAMBI Rizkien Putra; Tamrin Kasim; Ansosry Ansosry
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
Publisher : Jurusan Teknik Pertambangan FT UNP

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Rancangan sistem penyaliran di PT. Artamulia Tatapratama belum optimaluntuk menangani air yang masuk ke pit tambang baik air limpasan maupun airtanah. Catchment Area pada daerah penelitian dibagi menjadi 4 bagian, luasnyasecara berurutan adalah 43,33 Ha, 63,01 Ha, 60,26 Ha dan 20,2 Ha. Debit air totalmasing-masing catchment area secara berurutan adalah 1,456 m3/detik, 2,492m3/detik, 2,133 m3/detik dan 1,532 m3/detik. Volume tampungan optimal mainsump, temporary sump central, serta temporary sump timur secara berurutan adalah90.317,5 m3, 23.285,5 m3, 96.785,5 m3serta. Saluran terbuka yang direncanakanyaitu pada catchment area I, dimana saluran terbuka bertujuan untuk mencegah airmasuk ke front penambangan. Pompa yang digunakan adalah pompa Multiflo MF-420E 2 buah pada main sump dan CF-48H masing-masing 1 buah pada temporarysump timur dan temporary sump central. Besar debit pompa yang harus ditampungsettling pond adalah sebesar 0,594 m3/detik, jadi volume settling pond yangdirencanakan adalah 21.264 m3. Biaya yang dikeluarkan untuk operasi pompaadalah sebesar Rp 3.187.000/jam. Sedangkan biaya yang dikeluarkan untukpembuatan sump keseluruhan adalah sebesar Rp 1.488.793.210,7. Biaya pembuatansaluran terbuka sebesar Rp 61.494.110,51 dan pembuatan settling pond adalah Rp101.435.538,4.Kata kunci : Sistem penyaliran, tambang terbuka, curah hujan, catchment area, sump, saluran terbuka, settling pond, pompa,
Studi Geologi dan Prospek Kualitas Andesit Di Daerah Nagari Tambang Kec IV Jurai Pesisir Selatan Sebagai Bahan Bangunan dan Tambang Aan Kurniawan; Ansosry Ansosry
Bina Tambang Vol 5, No 2 (2020): JURNAL BINA TAMBANG
Publisher : Jurusan Teknik Pertambangan FT UNP

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Abstract. Calculation of resources plays an important role in determining the amount of reserves and determining the amount, quality and ease of commercial exploration of a sediment. Because the results of resource calculations can be continued on a good calculation of reserves later to be able to determine the investment that will be planted by investors, how to mine even in estimating the time needed by the company in carrying out its mining business. The purpose of this study is to determine the amount of andesite indicated by the method of cross section and contour in Nagari Tambang Pesisir Selatan / West Sumatra. Data processing is done with the help of mine software in making contours, incisions and calculations. Determination of research boundaries is based on the presence of outermost outcrops.The results of the research have been carried out with the cross section method, which is making incision lines that cut the overburden, then calculating the area of each incision and finally the volume can be determined using the inter-incision distance and 9,079,700 tons and the contour method namely using each contour to calculate the area and volume of each contour interval, the andesite indicated amounted to 8,435,602.5 tons with a total OB volume of 43,650 m³.Keywords: Resources, Andesite, quality, cross section, contour
Evaluasi Kinerja Alat Gali Muat dan Alat Angkut Untuk Mencapai Target Produksi Pada Penambangan Batukapur di Area 242 (Tajarang) PT. Semen Padang Heksali Preduanda; Ansosry Ansosry
Bina Tambang Vol 4, No 3 (2019): JURNAL BINA TAMBANG
Publisher : Jurusan Teknik Pertambangan FT UNP

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Abstract

This study aimed to calculate the actual productivity of mechanical devices, to get an effort to improve work efficiency to achieve the planned production target, to get the transportation equipment needed to reduce waiting time by using queuing theory calculations in 242 Area limestone mining (Tajarang) PT. Semen Padang. The mining system was done by the quarry method which was of type side hill type with a production target in 2019 of 5,196,699 tons with an average production target of 1,200 tons per hour. The equipment used consists of 1 unit excavator Hitachi EX2500-6 and 5 units of Komatsu HD 785-7 dump truck. The actual productivity of the two devices was able to produce 1,174.85 tons/hour and 975.55 tons/hour respectively. By improving the effective working time, work efficiency could be increased to 86% and made improvements to the composition of the equipment obtained productivity results 1 unit excavator of Hitachi EX2500-6 able to reach the number 1,443.38 tons/hour and 4 units of Komatsu HD dump truck transported 785-7 of 1,362.72 tons/hour. The results of this study mean that the effective time of work and the harmony of work of actual mechanical devices has not been maximized.Keywords:  Productivity, Work Efficiency, Match Factor, Excavator, Dump Truck.
IDENTIFIKASI TINGKAT KESERAGAMAN BATUAN HASIL PELEDAKAN DENGAN METODE KUZ-RAM DAN METODE KOEFISIEN TEKSTUR PADA FRONT I TAMBANG QUARRY PT. SEMEN PADANG Marchellevandra Gomis; Dedi Yulhendra; Ansosry Ansosry
Bina Tambang Vol 2, No 1 (2015): Jurnal Bina Tambang
Publisher : Jurusan Teknik Pertambangan FT UNP

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Abstract

PT. Semen Padang is one of the greats cement producer industry in Indonesia. PT. Semen Padang has a mining business license for limestone mining at Bukit Karang Putih – Indarung, Padang City, West Sumatera. For getting limestone, PT. Semen Padang used quarry mine system and blasting technique in separating limestone from rock body.In blasting, one of success variable can be viewed from the size of fragmentation and rock uniform level. Size of fragmentation and rock uniform level can be expected with good blast geometry plan. Will be obtained good rock fragmentation, and good uniform level. From the geometry of the blasting used in PT Semen Padang, obtained rock size fragmentation up from 120 cm percentage is 7,84 % with rock uniform level 1,47 and the volume of rock explosed 126 m3 from one blast hole. The percentage of rock filtered is quite good. However, it’s not followed by rock uniform level and rock explosed volume. So that, need for changes blast geometry with ICI – Explosive Method for getting good fragmentation size, good rock uniform level and large rock explosed volume.After calculated and experimented in the site. The most suitable blast geometry is 5 m for spacing and 4 m for burden. So, we can get 210 m3 limestone from one blast hole, with size of rock fragmentation up from 120 cm is 20,92 %, and rock uniform level 1,26. Therefore, will have the impact on increasing the limestones product and rock uniform level better.
Evaluasi Pengaruh Geometri Hauling Road Batubara Terhadap Produksi Dump Truck Iveco 380 Trakker Dari Pit Sari Menuju Stockpile PT. Adimitra Baratama Nusantara, Sangasanga, Kutai Kartanegara, Kalimantan Timur Fauzi Fitri Nasrul; Ansosry Ansosry
Bina Tambang Vol 4, No 1 (2019): JURNAL BINA TAMBANG
Publisher : Jurusan Teknik Pertambangan FT UNP

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Abstract. Pit Sari coal production target PT. Adimitra Baratama Nusantara in April 2018 amounted to 200,850.0 tons / month, but the amount of coal mined in pit sari in April was only 194.645,27 tons. The combination of transport and loading equipment used is 1 unit Caterpillar 349D excavator with 6 units of Dump Truck Iveco 380 Trakker. After measuring the width of the straight road and the bend, it was found that the condition of the width of the road was not yet in accordance with the wide standard that can be passed by the conveyance. One solution to increase production is to improve road geometry conditions such as increasing the width of the road, decreasing the slope of the road, to pay attention to cross slope and superelevation. Based on the calculation of road geometry evaluation, the width of the straight road and the bend that is passed by OHT Caterpillar 777D is 21,58 meters and 24,08 meters. While for the standard road width passed by Iveco Dump Truck itself is 13,53 meters and 16,08 meters. Road grade > 9% must be reduced to 9%. The cross slope number that must be made is 43,16 cm for the road that is passed by OHT, 27,06 cm for the road that is passed by the Dump Truck Iveco 380 Trakker. The super elevation that must be made is 74 cm. Production after repairs to the haul road geometry reached 217.167,57 tonsKeywords: Dump Truck, Iveco 380 Trakker, Road Geometry, Production, Cycle Time.
PERENCANAAN REKLAMASI LAHAN BEKAS PENAMBANGAN PIT D1 PT. AMAN TOEBILLAH PUTRA SITE LAHAT SUMATERA SELATAN Eka Retno Sari; Ansosry Ansosry; Heri Prabowo
Bina Tambang Vol 2, No 1 (2015): Jurnal Bina Tambang
Publisher : Jurusan Teknik Pertambangan FT UNP

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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.
Co-Authors Aan Kurniawan Abdullah, MT, Dr. Rijal Agung Wijaya aufa fikri abdillah Bambang Heriyadi Dedi Yulhendra Divo Oktoberen Eka Retno Sari Fauzi Fitri Nasrul Hastia Ulfa Heksali Preduanda Heri Prabowo Joni Pradinata Jukepsa Andas Marchellevandra Gomis Marta Borisman Merja Arta Monalisa Monalisa Muhammad Agil Fadhili Muhammad Deno Akbar Muhammad Divo Muhammad Ilham Rasyidi Muhammad Zaki Mulya Gusman Qhori Dies Hardila Rifky Pratama Putra Riko Maiyudi Rizkien Putra Tamrin Kasim Yonal Ferdian Yunasril Yunasril Yuyu Fajriyatil Husni Yuyun Frediana