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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences BULETIN OSEANOGRAFI MARINA Journal of Aquatropica Asia PROMINE Logista: Jurnal Ilmiah Pengabdian Kepada Masyarakat Jambura Geoscience Review Jurnal Abdi Insani Jurnal Himasapta Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Journal of Applied Geology MINERAL Jurnal Riset Kelautan Tropis (J-Tropimar)
Irvani, Irvani
Jurusan Teknik Pertambangan, Fakultas Sains Dan Teknik, Universitas Bangka Belitung
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics

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Potensial Mineral Kasiterit Pada Tailing Penambangan Timah Daerah Parit Tiga Kabupaten Bangka Selatan Rezky Dwi Aditya; Irvani Irvani; Janiar Pitulima
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.v7i1.3334

Abstract

Unconventional tin mining in Parit Tiga Village, Toboali District, South Bangka Regency is one of the mining sites that is rampantly carried out by the community. The problems that arise from the activities carried out by the community indicate that tin minerals in that location still have the potential to be mined at the conventional mining scale, this condition makes researchers want to study how much potential Sn levels are still contained even though the location is in the form of tailings. Data collection was 16 points at the first tailings location with an area of 160.000 m2 and 15 points at the second tailings location with an area of 150.000 m2. The samples were taken regularly with a distance between samples of 100 meters with a depth of 1,5 meters. Tailings samples were then tested using a microscope overview analysis method to obtain cassiterite levels. The results showed that the study area had 201.15 tons of Cassiterite potential at the first location and 300 tons at the second location to be studied further in terms of its economics.
Analisis kestabilan lereng menggunakan metode kesetimbangan batas dan probabilistik di TK 4488 PT Timah Tbk Pratama Aditya Irawan; Franto Franto; Irvani Irvani
Jurnal Himasapta Vol 8, No 1 (2023): Jurnal Himasapta Volume 8 Nomor 01 April 2023
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jhs.v8i1.8726

Abstract

TK 4488 merupakan tambang alluvial. Tambang ini dulunya merupakan bekas tambang, seiring harga timah semakin baik maka dikerjakan kembali dengan kondisi material loose yang rentan terjadi kelongsoran. Penelitian dilakukan untuk menganalisis kestabilan lereng melalui pengujian sifat fisik dan mekanik, metode kesetimbangan batas dan probabilistik Monte Carlo. Satuan lapisan penyusun lereng terdiri atas satuan, Pasir Lanauan, Pasir Bergradasi Jelek, Pasir Bergradasi Baik, Pasir Bergradasi Buruk dengan Kerikil dan Lempung, Pasir Bergradasi Baik dengan Kerikil dan Lempung, Pasir Bergradasi Baik dengan Lempung. Penampang A–A’ FK deterministik 1,30, PK 4,60% dan FK mean 1,31 kondisi statis. FK deterministik 1,06, PK 20,20% dan FK mean 1,07 kondisi dinamis. Penampang B–B’ FK deterministik 2,97, PK 0% dan FK mean 2,98 kondisi statis. FK deterministik 1,80, PK 0% dan FK mean 1,80 kondisi dinamis. Penampang C–C’ FK deterministik 2,39, PK 0% dan FK mean 2,35 kondisi statis. FK deterministik 1,06, PK 22,10% dan FK mean 1,06 kondisi dinamis. Dilakukan optimasi pada penampang A–A’ dan penampang C–C’, FK deterministik 1,23, PK 0,40% dan FK mean 1,23 penampang A–A’. Sedangkan penampang C–C’ FK deterministik 1,26, PK 0,20% dan FK mean 1,27.
Komparasi blasting single rod dengan double rod terhadap keberhasilan peledakan di Pit South Tutupan PT Adaro Indonesia Erika Saskia; Irvani Irvani; Guskarnali Guskarnali
Jurnal Himasapta Vol 8, No 2 (2023): Jurnal Himasapta Volume 8 Nomor 02 Agustus 2023
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jhs.v8i2.9362

Abstract

Penelitian ini menganalisis perbandingan blasting single rod 8m dengan double rod 12m terhadap volume, powder factor, fragmentasi dan digging time di pit South Tutupan (BUMA) PT Adaro Indonesia. Permasalahan pada penelitian adalah ketercapaian material blasting aktual yang rendah sebesar 43% pada September 2021 – Maret 2022 sehingga diperlukan eskalasi berupa improvement blasting double rod. Dilaksanakan pada 7 front single rod (263 lubang) dan 7 front double rod (174 lubang) dengan pengambilan data berupa data pemboran peledakan, foto fragmentasi dan parameter BI. Hasil penelitian menunjukkan deviasi geometri peledakan didominasi nilai underplan dengan 4 deviasi tertinggi pada double rod yaitu deviasi spasi, depth, stemming dan PC serta 1 deviasi tertinggi pada single rod yaitu deviasi burden. Hasil peledakan metode double rod lebih efektif dibandingkan single rod diantaranya persentase volume lebih tinggi 19,98%, ukuran fragmentasi aktual lebih kecil 8,19 cm, indeks keseragaman lebih besar 0,15, potensi fragmentasi boulder lebih kecil sebesar 5% serta perolehan layer digging lebih optimal. Namun, double rod menghasilkan nilai PF lebih tinggi 0,01 kg/BCM dan digging time lebih tinggi 0,1 detik. Rekomendasi formula bahan peledak efektif untuk single rod:  = [(-0,0159 (DB) + 0,1874) (49382(DS) + 48934)] dan untuk double rod: = [(-0,071(DD) + 0,1815) (-17751(DB) + 65269)].
EVALUATION OF WATER QUALITY FOR THE NILE FISH-FLOATING NET CAGE AQUACULTURE SYSTEM AT BANGKA BELITUNG UNIVERSITY andri kurniawan; Denny Syaputra; irvani Irvani
Journal of Aquatropica Asia Vol 8 No 2 (2023): Journal of Aquatropica Asia
Publisher : Jurusan Akuakultur, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/joaa.v8i2.4302

Abstract

The water quality feasibility is an important factor in aquaculture activities and increasing the productivity of cultivated fish. The Bangka Belitung University (UBB) is developing nile fish cultivation in earthen ponds using a floating net cage system. However, there has been no study related to the quality of water in earthen ponds that can be used to determine the feasibility of using these ponds for fish farming, especially nile fish. This study aimed to evaluate the water quality for the nile fish-floating net cage aquaculture system at Bangka Belitung University. The physical and chemical parameters observed were pH, temperature, DO, BOD, COD, NH3-N, PO4-P, NO3-N, NO2-N, NH3, C-organic, and minerals. Measurements of fish performance were observed in the form of SR, ADG, SGR, absolute growth (length and weight), and FCR. The results showed that in general the water quality of the earthen pond of UBB was still feasible for nile fish cultivation which produced SR (100%), ADG (0.20 g/day), SGR (2.18%/day), and FCR (1, 3). Water quality engineering can be done by adding a water wheel to increase the concentration of dissolved oxygen and also reduce the activity of Fe and other minerals that cause acidity and inhibit the growth rate of nile fish
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

Abstract

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%.
Co-Authors Abrianto Akuan Adibrata, Sudirman Adiyatma Adiyatma Alfitri Rosita ANDRI KURNIAWAN Artasari, Elsha Delvi Bayu Rahmadika Damos Tiambunan Delita Ega Andini Denny Syaputra Desi Fatimah Dwikorita Karnawati Elisa Elisa Elsha Delvi Artasari Epi Epi EPSB Taman Tono Erika Saskia Ferra Fahraini Franto, Franto Gregorius Fredrick Guskarnali, Guskarnali Haslen Oktarianty Hermita Ramadhini Indra Gunawan Indra Hot Daniel Hutasoit Irza Tri Putra Janiar Pitulima Jimmy Irawan Lenny Lenny Leyriesa Awdina Mardiah Mardiah Masyeba Evans Lubis Maulana Firdaus Muh. Yusuf Muhammad Rizki Aulia Muhammad Yusuf Mukram Belto Pratama Mu’alimah Hudatwi Mu’alimah Hudatwi Nabila Faradibah Nandito Andrian Pamungkas, Aditya Pignollee Donarthy Pratama Aditya Irawan Rajandra Nurhadi Randa Wirana Rezky Dwi Aditya Roby Hambali Siti Halimah Nasution1 Teo Aldino Vikram Rinaldi Wahyu Wilopo Yayuk Apriyanti, Yayuk Zuhirmanto Zuhirmanto