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All Journal Prosiding Temu Profesi Tahunan PERHAPI Jurnal Agriovet International Journal of Social Service and Research Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil MINERAL
Diana Purbasari
"Sriwijaya of University"
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Social Sciences Transportation

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STUDI PEMANFAATAN TEKNOLOGI TERRESTRIAL LASER SCANNER UNTUK MENGHITUNG VOLUME PENGUPASAN OVERBURDEN DI PIT 2 ELEKTRIFIKASI BANKO BARAT PT. BUKIT ASAM, TBK. TANJUNG ENIM, SUMATERA SELATAN Maharfi, Ezil Defri; Arief, Taufik; Purbasari, Diana
Prosiding Temu Profesi Tahunan PERHAPI 2018: Prosiding Temu Profesi Tahunan PERHAPI
Publisher : PERHAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1265.531 KB) | DOI: 10.36986/ptptp.v0i0.5

Abstract

PT. Bukit Asam, Tbk. merupakan perusahaan pertambangan batubara yang terletak di Tanjung Enim, Kabupaten Muara Enim, Provinsi Sumatera Selatan. Selama ini pengukuran volume pengupasan overburden dilakukan menggunakan alat Total Station. Pengukuran area overburden yang luas dan bentuk permukaan yang beragam menggunakan Total Station dinilai kurang efektif karena lamanya waktu yang dibutuhkan dan rendahnya tingkat ketelitian. Oleh kerena itu, diperlukan alat yang dapat mengukur volume dengan cepat serta menghasilkan data ukuran volume yang detail dan dengan kerapatan tinggi. Salah satunya yaitu penggunaan Terrestrial Laser Scanner. Metode yang digunakan dalam melakukan pengukuran yaitu metode occupation and backsight. Pengukuran menggunakan metode occupation and backsight diperlukan dua titik yang telah diketahui koordinatnya yang digunakan sebagai titik berdiri alat dan untuk titik acuan (backsight). Metode registrasi yang digunakan yaitu metode occupation and backsight dan metode cloud to cloud. Data point clouds yang telah diregistrasi perlu dilakukan filtering untuk menghilangkan noise dan objek asing yang bukan lapisan overburden. Perhitungan volume dilakukan dengan metode cut and fill terhadap model tiga dimensi dari point cloud yang terbentuk. Data hasil perhitungan didapatkan volume pengupasan overburden selama Desember 2017 sampai dengan Mei 2018 adalah sebesar 847.937 m3, dengan rincian 255.700 m3 di bulan Desember 2017, 299.120 m3 di bulan Januari 2018, 227.543 m3 di Bulan Februari 2018 dan 65.572 m3 di bulan Maret 2018.
PENGEMBANGAN KAPASITAS PENDUDUK DALAM PEMANFAATAN KOTORAN SAPI MENJADI PUPUK ORGANIK: DEVELOPMENT OF POPULATION CAPACITY IN UTILIZING COW MANAGE INTO ORGANIC FERTILIZER Pebrianto, Rosihan; Asyik, Makmur; Bochori, Bochori; Purbasari, Diana
Jurnal Agriovet Vol. 6 No. 1 (2023): JURNAL AGRIOVET
Publisher : LPPM UNIVERSITAS KAHURIPAN KEDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51158/agriovet.v6i1.998

Abstract

Desa Langkan merupakan salah satu desa yang berada di Kecamatan Banyuasin III Kabupaten Banyuasin Provinsi Sumatera Selatan. Desa yang memiliki potensi kotoran sapi yang begitu besar karena kelompok tani desa ini mendapatkan hibah sapi dari Pemerintah Pusat. Kandangnyapun merupakan bantuan dari Pemerintah. Selama ini kotoran sapi tidak digunakan oleh penduduk setempat, melainkan hanya dibuang begitu saja. Lingkungan yang berbau menjadi pemandangan yang biasa. Melalui pendekatan pengetahuan, penduduk setempat didampingi untuk meningkatkan kapasitas mereka. Maka dilakukanlah kegiatan pengabdian ini dengan memadukan antara teori dan praktek langsung. Bahan pupuk organik seperti kotoran sapi, EM4, gula merah, dolomit atau kapur, dan air merupakan bahan utama pembuatan pupuk organik ini. Setelah dilakukan penyampaian materi kemudian dilanjutkan dengan praktek pembuatan pupuk organik. Hasilnya penduduk memiliki kemampuan dan memahami setiap proses pembuatan pupuk organik. Setelah 7 hari kegiatan ini berlangsung dan penduduk sudah menikmati hasil pupuk organik yang dibuat saat kegiatan ini. Lingkungan yang sebelumnya kotor sudah ada perbaikan. Kotoran sapi yang selama ini menumpuk sudah mulai dimanfaatkan sebagai pupuk organik dan bernilai jual. Kedepan, mengingat potensi kotoran sapi yang begitu besar di desa Langkan ini, nanti juga akan dikembangkan pemanfaatan kotoran sapi menjadi energi biogas
Perbaikan Jalan Angkut Menggunakan Geotextile untuk Meningkatkan Produktivitas HD 785 pada Site Gurimbang Mine Operation, PT. Berau Coal: Improvement of Hauling Road with Geotextile to Increase Productivity of HD 785 at Site Gurimbang Mine Operation, PT. Berau Coal Asof, Marwan; Purbasari, Diana; Agustian Putra, M. Andra
Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Vol. 12 No. 1 (2023): Cantilever
Publisher : Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35139/cantilever.v12i1.213

Abstract

PT. Berau Coal is one of the mining companies in Indonesia that focuses on coal mining and sales. This research was carried out on the haul road at Site Gurimbang Mine Operation, where the condition of the haul road is currently undulating and located above a swamp area. This condition reduces the speed of HD 785, resulting in the unit's productivity not achieving the company's target. The effort to improve the condition of the haul road is by using geotextile as a method of strengthening the haul road. The aim of this research is to determine the changes in soil density and soil bearing capacity after the geotextile reinforcement and to identify its impact on HD 785 productivity. The research was conducted by analyzing and processing data from the results of the DCP in-situ test to determine the soil density and soil bearing capacity in the initial and post-geotextile installation conditions. Actual field data collection in the form of HD 785 cycle time and speed data was used to evaluate the unit's productivity before and after geotextile installation. The results indicated that the utilizing geotextile can increase the soil density and soil bearing capacity to meet the CBR standards and soil bearing capacity for HD 785 units. The use of geotextile also increased the speed of HD 785 by 3 km/hour, both during load and empty travel, resulting in an increase in HD 785 productivity by 26% from the initial 43,821.63 bcm/month to 55,375.62 bcm/month.
Application of Air Deck Method to Reduce the Impact of Ground Vibration and Optimization of Limestone Fragment Size in Blasting Activities at PT Semen Baturaja (Persero), Tbk. Arief, Taufik; Purbasari, Diana; Intan, Aliyah
International Journal of Social Service and Research Vol. 3 No. 12 (2023): International Journal of Social Service and Research (IJSSR)
Publisher : Ridwan Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46799/ijssr.v3i12.629

Abstract

The field experiment of applying the air deck method to the limestone blasting activities of PT Semen Baturaja (Persero), aims to reduce the impact of ground vibration considering that mining activities are approaching residential areas. In addition, the size of the fragmentation of the blasting results is very important for the effectiveness of the crushing plant. To determine the effectiveness of the application of the air deck method in limestone mining (quarry), blasting planning activities are carried out by dividing the two blasting locations, namely blasting with the air deck method and without using an air deck. By using a zig-zag blasting pattern and the number of holes of 50 Lb, the depth of the drill holes is 9 meters (without air deck) and 13 meters and the type of explosive used is Nonel. From the results of the analysis of limestone blasting with data processing using the split desktop 2.0 demo application, the ground vibration value (micromater system) was obtained. The average value of ground vibration (pVS) shows a smaller value using the air deck method of 0.68 mm/sec while without air deck of 0.74 mm/sec. The results of limestone fragmentation analysis with the air deck method obtained size <75cm reached 91.93%, while for without air deck it was 80.27%. These results show that the air deck method can be applied as a method to assist the Company in reducing ground vibration and limestone fragmentation effectively and efficiently by considering natural factors including geographical factors.
POTENSI LOGAM TANAH JARANG DI DALAM ABU BATUBARA: POTENTIAL OF RARE EARTH METALS IN COAL ASH Purbasari, Diana; Pebrianto, Rosihan; Harsiga, Edwin
MINERAL Vol 8 No 2 (2023): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v8i2.4364

Abstract

Coal is a fossil fuel that is still used as fuel for Steam Power Plants (PLTU). The greater the demand for electrical energy, the greater the need for coal to meet the fuel needs of the PLTU. The combustion of PLTU produces combustion residue in the form of fly ash and solid ash. Fly ash has its own problem level compared to solid ash. The issue of air pollution, sources of disease and radioactive pollutants are the negative impacts of fly ash left over from burning coal. Coal ash is formed from compounds that do not burn in the coal combustion process including the presence of rare earth metals (LTJ). LTJ is a valuable element which in certain levels can be processed into valuable goods. Separation of LTJ in coal can reduce the ash content and improve the quality of coal, so it is necessary to know the potential of LTJ contained in coal ash. The coal sample tested was coal from PT Bukit Asam Tanjung Enim Mining Unit. Identification of LTJ elements in the ash at the PLTU using XRD, ICP and SEM analysis. There is element Cerium (Ce) 55.3 ppm in fly ash and 22.6 ppm in bottom ash, element yttrium (Y) 36 ppm in fly ash and 10.7 ppm in bottom ash, element Lanthanum (La) 27.3 ppm on fly ash and 10.5 ppm on bottom ash. Neodymium (Nd) 26.1 ppm in fly ash and 6.9 ppm in bottom ash. Finally, there is an element of Samarium (Sm) 1.4 ppm in fly ash and 0.7 ppm in bottom ash. There is a promising potential for rare earths in coal ash, but for levels below 500 ppm it is still not feasible to manage, so it is necessary to enrich the rare earths first.
Co-Authors Agustian Putra, M. Andra Bochori Bochori Edwin Harsiga Intan, Aliyah Maharfi, Ezil Defri Makmur Asyik Marwan Asof Pebrianto, Rosihan Taufik Arief