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Kajian Teknis Penggalian Lapisan Tanah Atas dan Kaksa untuk Meningkatkan Laju Pemindahan Tanah pada Kapal Keruk 21 Singkep 1 di Perairan Air Kantung, Sungailiat, Bangka Aleo Saputra; E.P.S.B Taman Tono; Guskarnali Guskarnali
MINERAL Vol 2 No 2 (2017): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

One of the parameters of dredgers succeed is the rate success of overburden and kaksa per hour. For Dredger 21 Singkep 1 in September 2016 its LPT reach 493 m3/h, so it is still not yet achieved the ideal LPT dredger with bowl measuring 24 cuft of 782,44 m3/hour. The technical study on the excavation of top soil and kaksa done through the stages of research that consists of data collection, grouping the data as well as data processing and analysis. The results of this study indicateLPT ideal on the excavation of top soil for 978,05 m3/hour can be achieved by setting an average depth of 0.54 m emphasis ladder on the side wire speed of 6.82 m/minute and the pull wire speed setting aside that is equal to 8,04 m/minute at an average depth of 0.46 m emphasis ladder, while ideal in the excavation layer kaksa’s LPT of 586.83 m3/hour can be achieved by setting an average depth of 0.26 m emphasis ladder on the side of the wire speed 8.73 m/minute and the pull wire speed setting aside of 11.16 m/ minute at an average depth of 0.20 m emphasis ladder. LPT excavation of topsoil using face long methods reaches 845.38 m3/hour, or an increase of 19.7% from the LPT on short face methods that is equal to 652.78 m3/hour.

Pengaruh Penambahan NaOH dan Ca(OH)2 Terhadap Penurunan Kadar Logam Berat (Fe) di Kolong Tambang 23 Desa Kimhin Kecamatan Sungailiat Elgatania Dwi Apriastuti; Mardiah Mardiah; Janiar Pitulima
MINERAL Vol 2 No 2 (2017): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Tin mining activity causes a lot of opening pit known as kolong in Bangka Island. Ecologically, kolong has function as retention reservoir that contain harmful acid water. Tin mining ex-pit potentially causes environment effects especially the quality and quantity of water contained heavy metal. One of kolong in Tambang 23 Kimhin Village of Sungailiat subdistrict contain a quite high of heavy metal of Fe in amount 2.18 mg/L that tested from the result of testing of Health Official Laboratorium of Bangka Regency. Therefore, this research conducted to decrease metal grade in the water kolong. This research focused based on metal grade of Fe value. Analysis conducted by counting the decrease of percentage of Fe metal grade. The method used in lowering metal grade was precipitation method using NaOH and Ca(OH)2 solution. Metal grade analysis used spectrophotometer. The aim of this research was to determine the influence of solution concentration, precipitation time and solution influence of NaOH and Ca(OH)2 in lowering Fe grade. The result of research showed the influence of adding precipitation of NaOH and Ca(OH)2 with the precipitation time. The longer time of precitipation, the bigger percentage of lowering Fe metal. The biggest percentage of Fe metal grade was on concentration of NaOH 6% and Ca(OH)2 3% with the lowering percentage of 88.99% and 96.33% respectively. The optimum time to precipitate Fe metal was in 60 minute. Based on research result showed that precitipation of NaOH better than Ca(OH)2.

Perencanaan Tambang Secara Manual dan Software Micromine Sebagai Pembanding Pada Kapal Keruk 21 Singkep 1 Di Laut Air Kantung, PT Timah (Persero) Tbk Elisa Elisa; Irvani Irvani; Janiar Pitulima
MINERAL Vol 2 No 2 (2017): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Dredger 21 Singkep 1 is a mean of production offshore tin mining owned PT Timah (Persero) Tbk, which in 2016 is located in the Air Kantung Sea. Before the implementation of the necessary mining mine planning as a guide to provide an overview of work in the field conditions. Mine planning studies considering the economical extraction and analysis of the operations of dredgers by applying two ways; manually which reserves calculations using the Poligon Methods (Area Of Influence) with sea drilling spacing of 100 × 100 m and assisted Software Micromine as a comparasion. Based in the calculation, the value of the break even production of 42 tonnes ore/month and the break even grade of 0,23 kg/m3. Mining in May to October 2017 to continue the old location to the position of excavation to the northwest. Results obtained Idh manual production planning (Content Calculated) 1.263.980 m3, TDH (Tin Calculated) 0,292 kg/m3 and PDH (Production Calculated) 369,69 tonnes, while the calculation of Micromine obtained Idh 1.271.379 m3, Tdh 0,273 kg/m3 and Pdh 347 tonnes. Fault tolerance value 0,58%. Repair manual planning the excavation efficiency is obtained Idh 1.283.847 m3 increased 1,55%, Tdh 0,327 kg/m3 increased 10,7% and Pdh 409,37 tonnes increased 11,85%. Based on the analysis of drill profiles, the most effective method of extracting using combination system, where the overburden excavation with long face method and leaded soil with short face method.

Evaluasi Titik Impas Biaya Peledakan Batu Granit Bulan Januari 2017 Melalui Perbaikan Metode Peledakan Pada PT Vitrama Properti Di Desa Air Mesu Kabupaten Bangka Tengah Hendra Susanto; E.P.S.B Taman Tono; Janiar Pitulima
MINERAL Vol 2 No 2 (2017): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

PT Vitrama Properti is one of the private companies that run on the mining field, namely the mining of natural resources of granites. In this study, the researcher observes the cost of explosion used by PT Vitrama Properti in its mining of granites. According to the economic analysis, to determine the cost of explosion need to count on the breakeven point. The method employed in this research is to analyze the breakeven point. Breakeven point is a calculation used to know the volume of explosion rate so that the total income and total cost will be at the breakeven point. The data collection is conducted from December 2016 to February 2017, including the data of drilling cost, explosion usage cost, the salary of employees and contract employees, excavators and dump trucks fuel cost, equipment ownership cost, and the specification of explosion tools and equipment. The result of the data analysis shows that the total explosion cost paid by PT Vitrama Properti in January 2017 is Rp.1,041,936,063,00 and the total income earned is Rp.1,287,134,940.00, so the total profit made is Rp.245,198,976.00. Whereas, the breakeven point of PT Vitrama Properti in January 2017 is on the explosion volume rate of 23,109.08 m3 with the total earning and total cost is Rp.841,170,781.00. One of the significant factors to reduce the cost of explosion is to improve the geometry of explosion and to make the effective use of ANFO. After implementing the improved geometry of the explosion, the breakeven point is also improved from the volume rate of 23,109.08 m3 to the volume rate of 21,090.35 m3. Also, to increase the income from the explosion process can be done by increasing the sale of granite from the explosion (boulder) into 7,072.17 m3 with the total income of Rp.257,426,988.00, as well as by increasing the total product sale of 24,752.59 m3 with the total income obtained of Rp.900,994,458.00.

APLIKASI SOFTWARE GEOSTUDIO 2007 SLOPE/WUNTUK ANALISIS KESTABILAN LERENG DI TAMBANG MUARA TIGA BESAR UTARA PT BUKIT ASAM (PERSERO) Tbk SUMATERA SELATAN Irza Tri Putra; Guskarnali Guskarnali; Irvani Irvani
MINERAL Vol 2 No 2 (2017): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

PT Bukit Asam (Persero) Tbk is one of the State Owned Enterprises engaged in coal mining. Presente of Mine Muara slopes at Muara Tiga Besar Utara would be harmful to workers and the mechanical vehicle, because the soil/ rock is likely to experience landslides or falling. This study was conducted to determine the value of slope safety factor RKAP 2017 and redesign the slopes with a safe condition. The data used in this study include the value of cohesion (c’) the angle of friction (ϕ’) and density (γ). Retrieval of research data obtained from the test results did not drainage unconsolidated triaxial (UU) and test weight of soil/rock with Paraffin Wax Method, and then did the processing of data by using Software Geostudio 2007 Slope/w to determine the value of the safety factor of the slope. Factors affecting slope instability in Mine Muara Tiga Besar Utara were the geometry of the slope, weather/climate, vibration, and physical properties and mechanics of soil/rock composed of the density (γ), ie 1.203 to 2.025 gr/cm3, the value of cohesion (c’), which is 34 to 266 kPa and the shear angle value (ϕ’), ie 17.65 to 35.210. The results of slope stability analysis indicate that the value of slope safety factor RKAP 2017 was below 1.25, so the potential occurrence of landslides, while the redesign slope slope with the security condition had a value of safety factor is above 1.25, so that no potential landslides.

Penilaian Tingkat Kestabilan Lereng Batuan Granit Menggunakan Metode Slope Mass Rating (SMR) dan Analisis Kinematika di PT Mandiri Karya Makmur Mirsandi Mirsandi; Irvani Irvani; Ferra Fahraini
MINERAL Vol 2 No 2 (2017): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

PT Mandiri Karya Makmur (MKM) was a private company that mine granite rock. Level in mine site was almost steep so that it had the possibility to failure. The study was conducted to assess the stability of rock slope that may endanger the safety of workers. This study to determine the quality of rock mass of slope based on the value of SMR (Slope Mass Rating) and kinematics analysis. The data used included UCS, RQD, Space of discontinuity, Discontinuity conditions, Groundwater conditions and Discontinuity orientation data. Slopes data were divided into 4 scanline based on the direction changing of the slope. To determine the type of failure using kinematics analysis of Dips program and Schmidt Net.The analysis results revealed that the quality of rock mass for scanline II was very good or very stable based on the SMR value. While on the rock mass quality of scanline I, III and IV were good with the stability of the slope was in a stable condition. The possibility of a failure in scanline I, III and IV were only several blocks. There were two blocks that has possibility to failure was on scanline III and IV. Estimation direction of slope failure on scanline III and IV respectively were N 1350 and N 1850 E. The supporting of slope instability can be done by scaling or cutting blocks that have potential to failure.

Evaluasi Produktivitas Alat Gali-Muat dan Alat Angkut untuk Pengupasan Tanah Penutup Bulan Agustus 2016 Di Pit 3 Timur Penambangan Banko Barat PT Bukit Asam (Persero) Tbk Muhammad Arrofah; Mardiah Mardiah; Janiar Pitulima
MINERAL Vol 2 No 2 (2017): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

PT Bukit Asam (Persero), Tbk is a state-owned enterprise that operates in mining industry, particularly coal mining that has 4 main mining location. One of them is an east pit 3 of Banko Barat mining managed by PT SumberMitra Jaya. Mining process is exploited by using open pit methode which excavate overburden material using load-haulage equipment and transport system. Load-haulage equipments are used excavate, and to load overburden material, and transport system are used to carry overburden in disposal. This whole processes known as mechanical mining system. However, the actual condition of load-haulage productivity was only 84.56 % compared to determined target that caused overburden remova volume not to be achieved in amount of 15.44 %. Otherwise, evaluation of factors that affected performance of load-haulage equipment and transport system need to be conducted. Evaluation was conducted by calculating productivity, work efficiency, match factor of equipment, and load–haulage geometry. The data collected was cycle time, effective utilization, kind of material overburden and load-haulage geometry to get the value. Then, the collected data processed by using formula of mechanical soil movement and analysed based on literatures that related to the problem. The causing factors of load-haulage productivity in not achievement of determined target after evaluation conducted was low of work efficiency, amount of delay time in the amount of 1.19 minute caused by narrow transport roads, and low of match factor of equitment in the amount of 0.92. The alternatives that can be carried out to increase load-haulage productivity is increasing effective work time and widing transport road. Effective work time of transport system should be leveled up from 15.237 hour to 15.682 hour in fleet I and fleet II, and in fleet III should be leveled up from 14.122 hour to 14.567 hour. Thus, the total of transport system productivity will increase to 576,503.83 bcm/month from 486,247.59 bcm/month.

Optimalisasi Perencanaan Tambang Berdasarkan Pemilihan Kebutuhan Alat Berat Untuk Mencapai Target Produksi di Tambang Besar (TB 2.2) Tempilang Front 1 Kec. Tempilang Mitra PT Timah (Persero) Tbk Supriyadi Supriyadi; Mardiah Mardiah; Abrianto Akuan
MINERAL Vol 2 No 2 (2017): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Mining activities in TB 2.2 TempilangSite was conducted by Bahtera Sarindo Utama as a partner of PT Timah (Persero) Tbk.The method and technology used in mining site was Mechanical Mine as an alternative of conventional open pit mining which had been applied to overcome a great lack of hydraulic mining. There were several problems occurred in tin mining activities of TB 2.2 Tempilang included less of cycle time of gravel pump per day due to several problems that appeared in mine site such as gravel pump were often broken, Front Work landslides, so the production activity was inefficient. Mine planning of Mining mechanical methods plan Mechanics in TB 2.2 TempilangSite had production target of 320 m3 / h or 5,760 m3 / day. Therefore it was necessary to optimize the mining design to make it more efficient. The study included the election needs of load haulage equipment and conveyance based fleet to achieve production targets.Based on the results obtained, the need of equipment in hydraulic mine method for IDH work Front 1 to achieve production target was4 units of hydraulic pump, 4 units of gravel pump, 3 units of Excavators and 4 units of Articular Dump Truck with the total production of 5,976 m3 / day, and if using mechanical mine methodthe needs of load haulage equipment and conveyance for IDH removal was 1 fleet, 2 units of CAT 320D2 Excavator and 6 units of CAT 740B ADT with a total production of 6588.00 m3 / day with the production rate at 9.20 % greater than hydraulic mine and fleet 2 such us 1 unit of 345D CAT Excavator and 6 units of CAT 740B ADT 6 with the total production of 6468.12 m3/ day with the production rate at 7.60% greater than hydraulic mine.Based on the results obtained, mine lifetime of TB 2.2 TempilanFront 1 was 6,13 years using hydraulic mine method, 5,57 years for Mechanical mine of fleet 1 and 5.67 years for fleet 2. From these results suggested, that would better to use mechanical mine method in the removal of IDH in TB 2.2 Tempilang. With the availability of load haulage equipments and conveyance would counduct with fleet 1.

Pendugaan Potensial Penyebaran Mineralisasi Sumberdaya Timah Primer Menggunakan Metode Geomagnetik Pada Wilayah IUP PT TIMAH (Persero) Tbk Di Desa Pengarem Kecamatan Tukak Sadai Kabupaten Bangka Selatan Teo Aldino; Guskarnali Guskarnali; Irvani Irvani
MINERAL Vol 2 No 2 (2017): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Exploration is a phase before mining activity which is to know, estimate, and attain the measurement, shape, position, average ore content, and also the amount of minerals reserved sediment which are to know economic value. Based on the discovered outcrop, IUP PT TIMAH (Persero) Tbk located in Pengarem Village, Tukak Sadai District, South Bangka it is allegedly has potential source of cassiterite reserved sediment . in case to know the potential zone of source and the spread direction , it is needed to do exploration, one of it is by using geomagnetic method. By using 2 units of magnetometer tool along with base magnetometer application and mobile magnetometer to read (suseptibility) stones magnetic and minerals under the surface. The number of reading lines is 17, distance of the reading point is 10 m, with the number of reading point is 1587, the length of lines is 59 m. Based on the result of reading the geomagnetic method in Pengarem Village with IGRF value is 43204,2 inclination corners -23,493 declination 0,616 which are already corrected by Oasis Montaj V6.4.2 software owns variety value of suseptibility. The highest value is 52,1 nT and the lowest is -36,2 nT. The magnetic anomali contour map that is produced shows that there are potential zone and spread direction of cassiterite source from southwest to northeast. Analysis and conclusion based on geology data.

Kajian Teknis Penggalian Lapisan Tanah Atas dan Kaksa untuk Meningkatkan Laju Pemindahan Tanah pada Kapal Keruk 21 Singkep 1 di Perairan Air Kantung, Sungailiat, Bangka: Technical Study of Top Soil and Kaksa Diggingto Improve Soil Removal Rate of Dredger 21 Singkep 1 on Air Kantung Waters, Sungailiat, Bangka Regency Saputra, Aleo; Tono, E.P.S.B Taman; Guskarnali, Guskarnali
MINERAL Vol 2 No 2 (2017): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v2i2.1551

One of the parameters of dredgers succeed is the rate success of overburden and kaksa per hour. For Dredger 21 Singkep 1 in September 2016 its LPT reach 493 m3/h, so it is still not yet achieved the ideal LPT dredger with bowl measuring 24 cuft of 782,44 m3/hour. The technical study on the excavation of top soil and kaksa done through the stages of research that consists of data collection, grouping the data as well as data processing and analysis. The results of this study indicateLPT ideal on the excavation of top soil for 978,05 m3/hour can be achieved by setting an average depth of 0.54 m emphasis ladder on the side wire speed of 6.82 m/minute and the pull wire speed setting aside that is equal to 8,04 m/minute at an average depth of 0.46 m emphasis ladder, while ideal in the excavation layer kaksa’s LPT of 586.83 m3/hour can be achieved by setting an average depth of 0.26 m emphasis ladder on the side of the wire speed 8.73 m/minute and the pull wire speed setting aside of 11.16 m/ minute at an average depth of 0.20 m emphasis ladder. LPT excavation of topsoil using face long methods reaches 845.38 m3/hour, or an increase of 19.7% from the LPT on short face methods that is equal to 652.78 m3/hour.

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Jurnal Mineral

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mineral.ubb@ubb.ac.id

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+6281373020110

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mineral.ubb@ubb.ac.id

Editorial Address
Gedung Dharma Pengabdian, Fakultas Teknik Universitas Bangka Belitung, Kampus Terpadu UBB, Balunijuk Provinsi Kepulauan Bangka Belitung

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Kab. bangka,

Kepulauan bangka belitung

INDONESIA

Abstract

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Jurnal Mineral

Contact Email mineral.ubb@ubb.ac.id

Phone +6281373020110

Journal Mail Official mineral.ubb@ubb.ac.id

Editorial Address Gedung Dharma Pengabdian, Fakultas Teknik Universitas Bangka Belitung, Kampus Terpadu UBB, Balunijuk Provinsi Kepulauan Bangka Belitung

Location Kab. bangka, Kepulauan bangka belitung INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Jurnal Mineral

Contact Email
mineral.ubb@ubb.ac.id

Phone
+6281373020110

Journal Mail Official
mineral.ubb@ubb.ac.id

Editorial Address
Gedung Dharma Pengabdian, Fakultas Teknik Universitas Bangka Belitung, Kampus Terpadu UBB, Balunijuk Provinsi Kepulauan Bangka Belitung

Location
Kab. bangka,

Kepulauan bangka belitung

INDONESIA