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KURVATEK
Published by Institut Teknologi Nasional Yogyakarta
ISSN : -     EISSN : 24777870     DOI : https://doi.org/10.33579/krvtk.v4i1
Core Subject : Science, Social, Engineering,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Social Sciences
Jurnal KURVATEK diterbitkan pertama kali tahun 2016 oleh Pusat Penelitian dan Pengabdian masyarakat pada Sekolah Tinggi Teknologi Nasional Yogyakarta. Jurnal ini mempunyai misi sebagai media pengembangan ilmu pengetahuan dan teknologi dalam bidang geologi, pertambangan, elektro, sipil, material teknik,konversi energi, enegi terbarukan, serta perencanaan wilayah dan kota. Area tulisan dalam jurnal ini cukup luas. Cakupan penulisan mulai dari kajian pustaka maupun ekperimen yang ditulis dengan kaidah-kaidah penulisan ilmiah yang baik dan benar.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 13 Documents
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Search results for , issue "Vol 5 No 2 (2020): November 2020" : 13 Documents clear
EFEKTIVITAS SOFTWARE SPLIT DESKTOP PADA PELEDAKAN Agung Dwi Sutrisno
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.754

Abstract

Fragmentasi batuan sangat berpengaruh terhadap produktivitas penambangan yang menggunakan peledakan sebagai salah satu metode pembongkaran batuan. Tujuan penelitian ini adalah mengkaji efektivitas penggunaan Software Split Desktop pada analisis fragmentasi batuan hasil peledakan. Pendekatan penelitian ini menggunakan metode pengamatan di lapangan dan laboratorium. Data primer diambil langsung di lapangan dan data sekunder dari perusahaan. Data primer berupa foto fragmentasi hasil peledakan yang dianalisis ukuran fragmentasinya menggunakan Software Split Desktop. Hasilnya, Software Split Desktop dapat menganalisis dengan cepat fragmentasi batuan dengan media foto hasil peledakan. Analisis yang cepat ini dapat segera digunakan untuk mengubah desain peledakan berikutnya, sehingga menjadi lebih efektif.Kata kunci: batubara, konturing, kriging, trianggulasi.
KEMAMPUAN GEOLOGI TEKNIK UNTUK PENGEMBANGAN KAWASAN WISATA DAERAH EMBUNG JURANG JERO, HARJOBINANGUN, PAKEM, SLEMAN, YOGYAKARTA Wisnu Aji Dwi Kristanto; I Putu Gema Bujangga
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.1435

Abstract

Embung is an artificial building with the main function of collecting and distributing surface water. However, embung has a tourist attraction that is starting to become a trend of society. The development of the embung as a function of tourism must be supported by technical aspects, one of which is the engineering geology capability which is a measure of land suitability. Embung Jurang Jero was built in 2009 in Jurang Jero village, Harjobinangun, Pakem, Sleman, Yogyakarta with a capacity to accommodate 32,828.88 m3 of water. Located on the lower slopes of Merapi Volcano with natural attractions that support being developed into a tourist area. Thus, it is interesting to do research on the engineering geology capability of the embung Jurang Jero area for the development of environmentally friendly tourism areas. This research was conducted by mapping and weighting analysis of supporting parameters consisting of rock and soil carrying capacity, slope, geological hazard potential, groundwater depth, ease of excavation, and land use. The results showed three zones of engineering geology capability for the development of tourist areas in the form of high, medium, and low capability zones.Keywords: capability, Engineering Geology, embung, tourism, Jurang Jero.
PEMANFAATAN LIMBAH STYROFOAM SEBAGAI LOSS CIRCULATION MATERIAL PADA LUMPUR PEMBORAN PANAS BUMI lia yu nita
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.1605

Abstract

Drilling mud is an important factor in drilling operations. drilling mud can function properly, if the mud is always controlled for its physical properties. This research, utilizing Styrofoam waste which is used as an additive in drilling mud in geothermal drilling to overcome Loss Circulation. The physical properties of sludge used as a controller to overcome loss circulation include specific gravity (density), viscosity, and filtration loss. The purpose of this study is to prove styrofoam waste that can be used as a Loss Circulation Material. The methodology used in this study is in accordance with American Petroleum Institute API 13A Standards. The sample used in the test uses four drill mud samples and three measurements. Sample 1 drilling mud without additives, second sample drilling mud plus additive 1 gram Styrofoam, second sample drilling mud plus additive 2 gram styrofoam second sample drilling mud plus additive 3 gram styrofoam Materials used include aquadest, bentonite and polished Styrofoam waste. The results of the addition of three gram styrofoam obtained a price density of 8.63 ppg, mud cake valued at 1.254 mm, a 13 ml filtrate volume per thirty minutes with a pH of 9 and meeting the API standard. loss of circulation material in geothermal drilling.Keywords: Styrofoam waste, drilling mud, loss circulation material, geothermal
PENYELIDIKAN GEOLISTRIK MENGGUNAKAN KONFIGURASI SCHLUMBERGER TERHADAP POTENSI AMBLESAN DAERAH PONJONG, GUNUNG KIDUL Rizqi, Al Hussein Flowers; Yudhana, Waskita Murti Bambang
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.1769

Abstract

Administratively, the research area is included in Ponjong Subdistrict, Gunung Kidul Regency, Special Region of Yogyakarta. Geographically, it’s located in 07°56’30" - 08°1’0" East Longitude and 110°42’30" - 110°46’0" South Latitude. Several subsidences were occurred in Ponjong, Gunung Kidul in 2018. This study is aimed to determine the subsurface stratigraphy and analyze the depth of rocks layer which has the potential of subsidence (sinkhole) based on the value of rocks resistivity in Ponjong area. Resistivity was measured by geoelectrical method by appllying Schlumberger configuration. As a result, the study areas indicates that the most potential area having sinkhole are composed of lithology of carbonate rocks from Wonosari Formation (crystaline limestone and chalky limestone). Those are in the Asem Lulang village in showed small value of rock resistivity, about 0.1 to <1 (Ωm) at the depth of 15 to 63 meter and more than 123 meter. If it comparated to the village of Sawahombo and Kenteng village, the result showed that relative potential area of subsidence (sinkhole) only at shallow depth and nearly to the surface which is only 10 to 15 meter from surface.Keywords: geoelectric, ponjong, Schlumberger, Sinkhole, Wonosari
KAJIAN STABILITAS SISTEM KELISTRIKAN INDUSTRI Dulhadi Dulhadi; Dewi Indriati Hadi Putri
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.1814

Abstract

This research discusses the dynamic behavior of the operation of several synchronous generators in industrial electrical systems and to find out various factors that affect the stability of the electric power system. This research aims to develop an analysis method of stability that is practical, informative, and quite accurate. The analysis was performed by step by step numerical integration method. Observations were made on the oscillations between rotors, the simultaneity of the generator, the ability and speed of the system to reach a new steady state.The results of this research indicate that electrical system disturbance can cause oscillations between generators which reduce the ability and speed of the system in achieving steady-state conditions. This oscillation creates voltage and frequency fluctuations for a long time. Stability margins can be increased by regulating the burden for each generating unit corresponding with the characteristics and capabilities of each generator, network configuration, and operating load. Simulations of several cases indicate that the generator response to electrical noise very influenced by operating conditions, clearing time, location of disturbance, and changes in network configuration.Keywords: Transient stability, multi-machine system, step by step integration
TINJAUAN PENGGUNAAN ABU SISA PEMBAKARAN BATU BARA PABRIK DILEM TERHADAP KUAT TEKAN BETON Dwi Sri Wiyanti; Taufik Dwi Laksono; Atiyah Barkah
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.1816

Abstract

Many concrete study studied the use of substitute material that is fly ash, a coal combustion product from the steampowered electric generator. Coal is also used by PT. SCI, a Dilem leaves processing industry in Purbalingga regency. To determine whether the utilization of the residual ash from coal combustion of Dilem leaves industry meet the required compressive strength, a study was conducted on the compressive strength of concrete that use coal combustion ashes from PT SCI. The purpose of this study is to find out the effect of using coal combustion ash on concrete compressive strength and to find out the deviation in compressive strength of concrete that produced with the 10%, 12.5%, 15%, and 17.5% of coal combustion ashes on the weight of cement. The use of coal combustion ash affects the compressive strength of concrete and 12.5% of coal combustion ash as a cement substitution gives the maximum compressive strength that is 23.0 Mpa.Keywords: Concrete, Compressive Strength of Concrete, Fly Ash, Coal Combustion Ash
PALEOMORFOGENESIS BENTANG ALAM KOMPLEKS GUNUNG IJO, KULONPROGO Rr. Amara Nugrahini; Hill Gendoet Hartono; T. Listyani R.A.
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.1831

Abstract

Geomorphological studies of the Mt. Ijo complex area need to be done to understand the geomorphology of the past. The purpose of the study was to identify geomorphological characteristics in order to gain an understanding of Mt. Ijo's paleomorphogenesis. The research was conducted using geomorphological observation methods in the field and assisted by rock petrographic analysis. Mt. Ijo is an old volcano that forms the West Progo Hills. The Mt. Ijo complex is composed of a predominance of igneous and volcanic rocks in the form of coherent lava and pyroclastic, in addition to sedimentary rocks in the form of limestone. The Mt. Ijo complex forms the remains of an ancient volcano. The remaining morphology is interpreted as part of the ancient volcanic body in the central and proximal facies.Keywords: Mt. Ijo, paleomorphogenesis, volcanic facies, remaining landform
ANALISIS DEWATERING SYSTEM DALAM TAMBANG EMAS BAWAH TANAH A.A Inung Arie Adnyano; Achmanda Belvadi Sahmin Pane
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.1852

Abstract

Underground mining location Ciurug L.450 south, there is a lot of water entering or stagnant in the mine opening hole. At Ciurug L.450 south there are 10 mine sumps. The pumping system flows from one mine sump to the next mine sump to the main mine sump. The pump is used 24 units and is used interchangeably because electricity is limited and one pump works 15 hours / day. The purpose of this study is to reduce the number of pumps that do not work optimally and the use of electric power. Groundwater discharge measurements were carried out manually in three locations namely Ramp Down A, Ramp Down B, and Ramp Down C using trenches. Based on observations and data analysis, groundwater discharge XC 445 2,899 (m3 / m), XC 438 B 8,940 (m3 / m), and XC 438 A 1,440 (m3 / m). The actual electricity consumption of 1561,7 Kw was reduced after being designed to be 1061.5 Kw, and a design 19 pumps units was used.Keywords: Flow System, Pump, Water Discharge
PENGARUH AKTIVITAS PERTAMBANGAN TERHADAP NILAI PRODUK DOMESTIK REGIONAL BRUTO DAN EKONOMI MASYARAKAT DI PROVINSI KALIMANTAN TIMUR Wahyu Endah Christiani Putri; Akhmad Zamroni; Fajar Rizki Widiatmoko
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.1854

Abstract

Gross Regional Domestic Product (GRDP) is a macroeconomic indicator of the economic condition in a region. The development of GRDP per capita is often used as an indicator of a region's success in economic development. One of the economic sectors that is an indicator of the success of regional development is the mining and excavation sector. East Kalimantan Province is a province with a wealth of natural resources in the form of coal mining. The purpose of this study is to analyze the effect of mining activities in East Kalimantan on the value of the GRDP and the economic conditions in that region. The results showed that mining activities had a significant effect on the GRDP per Capita and the economic conditions of the people in East Kalimantan Province. GRDP according to mining and excavation fields has an effect of 0.9431 on GDP per capita in East Kalimantan Province. The number 0.9431 in statistics means that the X coefficient has a strong effect on the Y coefficient. All decreases and increases in mining and excavation fields have a significant and proportional effect on the economic conditions of the people in East Kalimantan Province.Keywords: Gross Regional Domestic Product (GRDP), mining, economic conditions, East Kalimantan.
IDENTIFIKASI RONGGA MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI DIPOLE-DIPOLE DAERAH NUSAKAMBANGAN CILACAP JAWA TENGAH Andi; Ajimas Pascaning Setiahadiwibowo
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.2005

Abstract

The identification of cavities on Nusakambangan island using the geoelectrical resistivity method of dipole-dipole configuration has been carried out. This method was used for lateral resistivity mapping on each path. The geoelectric resistivity test was performed by four paths with a length of 200 - 400 m. The results showed that there were several closure patterns that were interpreted as cavities along the surveyed trajectory. The closure patterns are (i) three on path A with a resistivity of more than 4000 ohmmeters, (ii) two on path B with a resistivity of more than 10000 ohmmeters, (iii) one on path C with a resistivity of more than 10000 ohmmeters, and (iv) two on path D with a resistivity of more than 2000 ohmmeter. Our results could be used as an illustration to mark locations on the surface where the sinkhole potential of a disaster exists.Keywords: Cavity; Dipole-dipole; Geoelectric; Resistivity

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