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All Journal Jurnal Pengabdian Kepada Masyarakat Universitas Bangka Belitung PROMINE Jurnal GEOSAPTA IKRA-ITH ABDIMAS MINERAL JAGE

Delita Ega Andini

Program Studi Teknik Pertambangan, Fakultas Teknik , Universitas Bangka Belitung

Author-ID : 5340726

Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Energy Engineering Environmental Science Materials Science & Nanotechnology Social Sciences Other

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Kajian Teknis dan Biaya Kegiatan Rehandling Batubara PT Bukit Asam Tbk Tanjung Enim Sumatera Selatan Rahmad Tanjung; Janiar Pitulima; Delita Ega Andini
MINERAL Vol 6 No 1 (2021): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

The East Block Muara Tiga Besar Utara mining system uses Shovel and Trucks where the digging stage uses excavators and bulldozers and the transport stage uses a dump truck. Coal production target of Muara Tiga Besar Utara Block Timur in July is 300,000 tons and August is 294,000 tons. The method used in this research is quantitative data analysis method by calculating the productivity of digging and transporting tools, analyzing the technical implementation of coal rehandling activities and analyzing the cost of coal production and rehandling activities. The results of this study obtained the productivity of PC 400 Lc excavator304.35 tons/hour, bulldozer D 375A of 674.61 tons/hour and Hino FM 320FI dump truck equipment of 37.06 tons/hour, the cost of coal production in July is IDR 13,772,009,648.00, in August IDR 13,495,592,315.10 and the cost of coal rehandling activities is IDR 160,685,158.30/month. Based on the cost of coal production and the cost of coal rehandling activities, it can be analyzed that there was a decrease in production costs between July and August due to a decrease in mining production targets in anticipation of coal rehandling activities.

Evaluasi Sistem Penirisan Tambang di PT Vitrama Properti Desa Air Mesu Kabupaten Bangka Tengah Riztia Ramadhanti; Delita Ega Andini; Haslen Oktarianty
MINERAL Vol 6 No 1 (2021): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

PT Vitrama Properti applies mine dewatering system by making open channel. The open channel got silting because many solid particles have deposited causing the mine road become flooded. The method used is quantitative method by evaluating and analyzing dewatering system. The data taken is in the form of coordinate data, actual discharge, channel dimensions and the time for sediment deposition on settling pond. Catchment area is 42.4 ha. Based on the calculation of rainfall data and rainfall analysis with the gumbell method, the maximum planned rainfall value is 183.9 mm/day with a rain intensity is 63.75 mm/day, the maximum total discharge is 156,193.92 m3 /day or 1.8078 m3 /day. The surface width of the new channel is 1.7 m, the bottom width is 0.5 m and height is 1 m. The new settling pond dimension have total design volume of 3,292.5 m3 . The time for dredging the sediment material in the settling pond is every one or two years when the sediment material in compartment one has deposited as much as 60% of settling pond volume

Kajian Efektifitas Kerja Operator dan Kondisi Alat pada Front Penambangan Tambang Besar Pemali PT Timah Tbk Rajesta F. Wardana; E.P.S.B. Taman Tono; Delita Ega Andini
MINERAL Vol 6 No 1 (2021): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

The work efficiency value on the TB Pemali mining front in 2018 is relatively low (57.16%), This condition means it required the improvement of the work efficiency in accordance with the good mining practice. Method used in this research including preparation, collecting data and field orientation, which is then processed as follows: counting work efficiency of the dig tools for load and hauling tools in mining area front, analyzing operator performance and equipments conditions in mining area front, and analyzing work efficiency improvements. The result showing that score of current work efficiency of the dig tools for load in the amount of 62.74%, and for hauling tools in the amount of 57.68%. This result shows that low score of work efficiency in mining area front caused by large breakdown time of the hauling tools and low performance of the operator, then improvement of work efficiency is carried out by reducing the operator's variable trouble limit by 35% and reducing indent time of broke sparepart, the final score of work efficiency of the dig tools for load in mining area front is in the amount of 66.27% and for hauling tools in the amount of 66.44%

Kajian Sistem Penyaliran Tambang Bawah Tanah Pada PT Allied Indo Coal Jaya Sawahlunto Sumatera Barat Ferdinand De Lessep Samosir; Franto Franto; Delita Ega Andini
MINERAL Vol 6 No 2 (2021): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

PT Allied Inco Coal Jaya (PT. AICJ) is a company that work in coal mining industry. This research is done at underground mining located at main shaft tunnel at +347 metres above mean sea level (MASL) with 334,04 m in length with room and pillar method as its mining method. This research is using quantitative method. From the calculation obtained, the total of incoming water into the mining production area is 6.13 m3/hour. For the actual incoming from well is as much as 13.32 m3/hour with the total head is as big as 29.56 m, as the time needed to discharge is 6.45 hour. Making the dewatering layout design for the incoming water at elevation of +347.32 MASL to main sump at +318 MASL with total length of 201.6 m, while the water discharged at continuous pumping at elevation +306 MASL moving toward +347.43 MASL with total distance 341.32 m. with the addition to incoming water there is an increase in the pumping working hours so it is concluded that there is difference between the planned cost and actual cost of Rp. 832,269.96.

Evaluasi Kinerja Limestone Crushing Plant Terhadap Target Produksi 108.000 Ton/Bulan Pada PT Indocement Tunggal Prakarsa Tbk Unit Palimanan-Cirebon Novi Herlinda; Delita Ega Andini; Haslen Oktarianty
MINERAL Vol 6 No 2 (2021): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

This research was conducted to optimize limestone production within a maximum of 30 days. The method used in this research is the frequency distribution statistical method for increasing the time of resistance, The data required are unit resistance hours at the Crushing plant. Based on research and calculations in the field, it is known that the work efficiency of the limestone crushing plant 09 unit is low, 62.87% with a total production only 73.846 tons/month. After many refinement efforts, work efficiency of the limestone crushing plant 09 unit increased 17.31% to 80, 19%, to increase the production target, refinement efforts were made to increase effective working hours by minimizing time constraints, and working time management accordingly production targets were achieved, therefore target production increased from 2,275 tons / shift to 4,173 tons / shift and the final production of crushing plant 09 increased to 125,190 tons / month

Evaluasi Teknis dan Biaya pada Sistem Penyaliran Tambang di Pit 4 Edward PT Caritas Energi Indonesia Sarolangun Jambi Nur Annisa; Franto Franto; Delita Ega Andini
MINERAL Vol 7 No 1 (2022): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v7i1.3330

This research was conducted to redesign the dimensions of the temporary sump to accommodate the total volume of incoming water so as to minimize the occurrence of puddles around the mining area. The method used is a quantitative method by analyzing daily rainfall data for 10 years (2011-2020) using the Gumbell distribution. Actual data in the form of field rainfall intensity, sump water level rise, dimensions and actual discharge of the channel as well as the length and diameter of the pipe. Based on the 5-year return period, the total incoming discharge is 27,043.160 m3/day and based on the maximum rainfall of 30,693.351 m3/day after pumping 607.71 m3/hour for 7 hours, resulting in a residual discharge of 22,789.190 m3/day for 37.5 hours (PUH 5 years) and 26,439.387 m3/day for 43.5 hours (maximum CH). The actual dimensions of all four of Edward's Pit 4 channels are already larger than theoretical. The pump cost which is planned to operate for 7 hours is Rp 408,107.14/day while the actual pump operates 4 hours with additional maintenance costs of Rp 174,811.20/day or ± 42% of the planned cost. Making the actual temporary sump is Rp 73,598,773.90 with an additional cost of making the recommended sump of Rp 62,874,123.60 or ± 85% of the actual cost with a total cost of Rp 272,744,273.

Pengaruh Laju Aliran Dan Ukuran Umpan Sisa Hasil Pengolahan Dengan Humprey Spiral Pada Skala Laboratorium Kabupaten Bangka Suryani Suryani; Franto Franto; Delita Ega Andini
MINERAL Vol 7 No 2 (2022): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v7i2.3512

Remaining Processing Results is a combination of grains measuring 0.001-0.6 mm and still has an economical concentrate content. Humphrey Spiral contained in PT Bumako produces cassiterite concentrate content of 2%, while the company's target concentration is 10%. So, a research was conducted on the Humphrey Spiral on a laboratory scale to determine changes in concentrate levels and cassiterite recovery, with flow rate parameters with variations of 1.017 m/s, 1.097 m/s and 1.172 m/s and feed sizes, namely 60 mesh, 80 mesh and 100 mesh. This research method uses Grain Counting Analysis (GCA) and XRF. Based on the results of the study, the accompanying minerals in the Humphrey Spiral bait consisted of 83.98% quartz, 5.65% limonite, 5.19% hematite, 2.83% iron oxide, 1.73% monazite, 0.34% chalcopyrite, magnetite 0.17% and muscovite 0.10%. The highest concentration gain and concentrate recovery was at a speed of 1.097 m/s at a grain size of 100 mesh with a content of 10.3788% and a high recovery of 44.1512%.

Kajian Teknis Pengolahan SHP menggunakan Shaking Table untuk Mengoptimalkan Kadar dan Recovery Sn di TB Batu Besi PT Timah Tbk Kristina Damayanti Panjaitan; Janiar Pitulima; Delita Ega Andini
MINERAL Vol 8 No 1 (2023): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v8i1.4096

PT Timah Tbk carried out the development by establishing TB Primer Batu Besi, East Belitung. The purpose of this study was to find out the variable setting of the shaking table in order to obtain optimal levels and recovery of Sn. The research method used is gravity concentration using a shaking table tool. The feed used is Remaining Processing Results from the primary shaking table. The experiment was carried out twice, the first experiment was carried out 27 times with a sample weight of ± 78 kg. Each experiment used 9 variations, namely the tilt of the shaking table (8°;8.5°;9°) and the stroke length (12mm, 14mm, 16mm). The second experiment used ±5 tons of material with the most optimal tool settings from the first experiment. The feed sample material and product shaking table were tested using the XRF and GCA tests. The analysis of the XRF test showed that the Sn content in the feed was 0.45%. GCA analysis shows that the associated minerals are cassiterite, ilmenite, monazite, pyrite, quartz, tourmaline, hematite and magnetite. The optimal setting for the operating variable of the shaking table is with a variation of the tilt of the shaking table 8° and a stroke length of 12 mm to obtain a concentrated Sn content of 8.04% and a concentrated Sn recovery of 20.75%. The second experiment obtained a total Sn recovery of 17.25%. If one additional SHP processing line is added to TB Batu Besi, the company's recovery will increase from ±15% to ±29.55%.

Interpretasi Material Pada Rancang Bak Ukur Skala Laboratorium Dengan Pendekatan Konfigurasi Wenner, Wenner – Schlumberger dan Dipole-dipole Guskarnali Guskarnali; Haslen Oktarianty; Irvani Irvani; E.P.S.B. Taman Tono; Delita Ega Andini
MINERAL Vol 8 No 2 (2023): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v8i2.4958

Geoelectric measurements have been carried out using multichannel ResistivityMeter (Geores) tools with Wenner, Wenner-Schlumberger, and Dipole-dipole Configuration approaches on the influence of materials arranged in a laboratory-scale measuring tub design with dimensions of 194x184x80 cm. The measured method is the variation in resistivity value against each trajectory of the material. The method used is the variation of resistivity values for each path of the material that has been arranged in a laboratory scale measuring design. Geoelectric measurements were carried out on 7 lines (5 line in the West-East direction and 2 line in the North-South direction). The spacing between the electrodes of each line is 10 cm with 16 electrodes in one line so that each line has a length of 160 cm or 1.6 m which corresponds to the length and width dimensions of a laboratory scale measuring design. The electrode arrangement parameters are constant with respect to changes in the configuration selected from the geores parameters during geoelectric measurements. The measurement results showed that the identified depth reached 31.2 cm. The low resistivity value category has an interval of 374-4,397 ohm.meters at a depth of 0-12.5 cm, which is the influence of building sand material containing water and soil, while the depth interval is 12.5 - 31.2 cm ohm.meters (material category that is influenced by 2 iron rods, tin tailings sand, granite, gravel) with resistivity values ranging from 12,378–67,498 ohm.meters. From experiments on the influence of the resistivity values of the three Wenner, Wenner-Schlumberger, and Dipole-dipole configurations, it was obtained that the smallest absolute error resistivity value in the Wenner configuration was 5.01% against the overall average absolute error resistivity value of 10.16%.

Kajian Teknis Kinerja Jig Primer terhadap Kadar Recovery dan Looses Bijih Timah pada SHP KIP Mitra Matras di Bidang Pengolahan Mineral Unit Pengolahan PT Timah Tbk Aditya, Ismu; Pitulima, Janiar; Andini, Delita Ega
MINERAL Vol 9 No 2 (2024): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v9i2.5073

Bidang Pengolahan Mineral Processing Unit of PT Timah Tbk operates in the field of tin ore processing. The problem at the research location is that there is no standard operating standard for the Primary Jig tool for washing Processing Waste (SHP). The aim of this research is to determine the settings for the Primary Jig variables in order to obtain optimal levels, Sn recovery and looses. The research method used is Grafity Concentration. The feed used is SHP from KIP Mitra Matras. The experiment was carried out 21 times. Each experiment used 7 variations of Primary Jig stroke speed (300 rpm, 350 rpm, 400 rpm, 450 rpm, 500 rpm, 550 rpm, 600 rpm) and Bed thickness (70 mm, 80 mm, 90 mm). Grain Counting Analysis shows a feed Sn content value of 9.96%. GCA analysis shows that the minerals in the bait are cassiterite, ilmenite, monazite, zircone, pyrite, siderite, limonite, tourmaline, quartz and iron rust. Low stroke speed results in high concentrate Sn content with low Sn recovery and little looses wasted and vice versa. A high Bed thickness results in low Sn concentrate content, high Sn recovery, and a lot of looses is wasted, and vice versa. Setting the optimal Primary Jig operating variables with variations in punch speed of 450 rpm and Bed thickness of 80 mm obtained a Sn content of 41.36% and a Sn recovery of 60.11%. Based on the results of calculating the degree of liberation, the highest average value of the degree of liberation was obtained at mesh -100, indicating that the SHP KIP Mitra Matras concentrate is classified as having a fine grain size.

Co-Authors Aditya, Ismu Alamsyah, Muhammad Izhar Alfitri Rosita Alldino Hernanto Aryuni Yusra Hamid Aulia, Nur Fajri Bobby Bagaskara Dihan Fauzan Edwin Harsiga EPSB Taman Tono Fajar Indah Puspita Sari Ferdinand De Lessep Samosir Franto, Franto Franto, Franto Guskarnali, Guskarnali Haslen Oktarianty Irvani Irvani Irvani, Irvani Irvani, Irvani Janiar Pitulima Jeffry Reynold Silalahi Kristina Damayanti Panjaitan M.Arief Adilah Novi Herlinda Nur Annisa Oktarianty, Haslen Rafi Sasena Rahmad Tanjung Rajesta F. Wardana Ramadhan, Setiawan Regita Kasih Parenty Reza Reza Rika Fitriani Riztia Ramadhanti Silaban, Cindy Grestina Suryani Suryani

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