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Heriyadi, Nur Widi Astanto Agus Tri
Institut Sains Dan Teknologi AKPRIND Yogyakarta
Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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PENGARUH DISKONTINUITAS MASSA BATUAN VOLKANIK TERHADAP STABILITAS LERENG DI DAERAH JELAPAN DAN SEKITARNYA, KECAMATAN PUNDONG, KABUPATEN BANTUL, DAERAH ISTIMEWA YOGYAKARTA Arie Noor Rakhman; Nur Widi Astanto Agus Triheriyadi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 10 No 1 Agustus 2017
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v10i1.85

Abstract

This research is intended to know the effect of discontinuity on the mass of volcanic rock for rock slope stability. The study sites are located at Jelapan area and its surrounding, Pundong District, Bantul Regency, Special Region of Yogyakarta. With stability assessments of rock slopes, it can be used to identify potential disasters of rock mass movement, direction of movement and recommendations for disaster risk minimization. Analysis of the continuity on the mass of volcanic rock using rock mass classification of rock mass rating system (RMR) (Bieniawski, 1989). The data used are physical properties, index properties, mechanical properties, orientation of joint position and rock slope. The synthesis of data is done mainly on morphological data, stratigraphy, geological structure to know the control of geological condition on the stability of volcanic rock slope in research area. Based on the calculation of the rock mass classification of RMR, the cliff at 7°59’20,88” LS 110°19’19,09” BT is 28 which is considered poor. The RMR value is controlled by intensive joints that dominate with joint spacing less than 60 mm; the condition of the surface of the joint field is smooth and continuous, estrangement joint 1 - 5 mm, slightly weathered with a value RQD 43.37%. Rock mass that collapses and landslides are lava and andesite breccia. The rock fall occurs following the slope of the planar plane of the platy joint structure and the rock contact N170°E/32°. It is interpreted by the initial stress control with high anisotropic stress at the edge of the slope.
POLA SEBARAN BATUBARA FORMASI NANGGULAN KABUPATEN KULONPROGO DAERAH ISTIMEWA YOGYAKARTA Nur Widi Astanto Agus Tri Heriyadi; Dina Tania
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 10 No 2 Februari 2018
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v10i2.95

Abstract

Coal is one of the energy resources still become the primary needs of strategic energy for sustaining national energy in Indonesia. This study discusses coal existence in Nanggulan Formation at Yogyakarta area. Coal distribution pattern in Nanggulan Formation can provide the geometry conception base on the geological research in Watupuru area encountered three coal outcrop (OC_1, OC_2, and OC_3) stratigraphically is at the bottom layer.Coal distribution in the research area influenced by the pattern of anticline structure which has the position of the wing of East and West with the relative anticline axis of north-south direction. Reconstruction results show there is two-seam of coal, for the first seam layer have 0,55 meters thickness and for the second seam layer have 20,57 meters thickness. Seam 1 of reconstructed surface data has spread on the East side of the anticline. Seam 2 stratigraphically under seam 1 of the reconstruction results indicate that the spread is close to the anticline axis and spreads on the east side of the anticline with a 26o slope and the western wing side of the anticline with a slope 10o.
ANALISIS KEKUATAN MASSA BATUAN ANDESIT MENGGUNAKAN KAIDAH KRITERIA KERUNTUHAN HOEK-BROWN UNTUK MENGETAHUI NILAI FAKTOR KEAMANAN LERENG PADA DAERAH SELOHARJO, KECAMATAN PUNDONG, KABUPATEN BANTUL, DIY Nur Widi Astanto Agus Tri Heriyadi; Dina Tania
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 1 Agustus 2018
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v11i1.110

Abstract

The study area has a steep hill morphology with dominant lithology of andesite lava from the Ngelanggran Formation. Steep morphology with water saturated conditions and platy joints on andesite lava as rock discontinuities with different properties and weathering can be weaking the slope stability. Analysis of the rock mass strength of andesite lava with Hoek-Brown collapse criteria using GSI, mi, uniaxial compressive strength, and D values ​​can be used to obtain rock strength in the form of cohesion (c) and internal friction angle (ɸ), to be applied in the analysis of slope stability. The safety factor (FS) on the slope concists lithology and platy joints and massive using the equilibrium limits approach on the natural slopes shows on safe conditions (FK = 7.5). On very steep slope (slope angle 80o) in LP S09B location which is the former slope of mining activity with lithology andesit platy jointings have strong slopes, and in the field of rock mass movement shows the result of FK value = 1.3 which is below the PU standard (> 1.5). Slope reinforcement can be done by lowering slope angle up to 75o so that the safe conditions at FS = 2.4.
STUDI REKOMENDASI PENGGALIAN DITINJAU DARI STRUKTUR BIDANG LEMAH DAN KEKUATAN BATUAN LAVA ANDESIT DI DAERAH GIRIMULYO, KECAMATAN GIRIMULYO, KABUPATEN KULONPROGO, PROPINSI DAERAH ISTIMEWA YOGYAKARTA Nur Widi Astanto Agus Triheriyadi; Arie Noor Rakhman
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 9 No 1 Agustus 2016
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v9i1.149

Abstract

Andesite mining material needs both for industrial development and may be available by way of mining activities. Girimulya area, District Girimulyo, Kulon Progo has abundant natural resources, among which andesite. This study aims to determine the direction of the excavation recommendation in terms of structure and a weak field strength andesite lava rock. Identifying physical properties and mechanical properties of materials on the excavation carried out as igneous rock andesite lava.Collecting data in the field include: plotting the location of observation; identification of rocks and weathering; data recording and sampling rock geology and weathering. Sampling each location point observations were made in the form of samples disrupted. Research in the laboratory / studio in the form of observational petrology, testing the physical properties of rocks and analysis of compressive strength / UCS. Along with field research and laboratory / studio, also conducted research relevant literature.Andesite in the study area is a product of the old volcanic activity that is part of the Old Andesite Formation. In the field, andesite lava fields have a weak form of fracture. Based on the graphical method Pettifer and Fookes (1994) in terms of the structure of the field is weak and the mining rock mechanics properties including the criteria for Easy Ripping to Very Hard Ripping. If it will be mining should be conducted prior to demolition andesite lava rock. Heavy equipment Bulldozer recommended that the type D6, D7, D8 and D9. Furthermore it can be dug with a backhoe to be loaded and transported.
PENDAMPINGAN KEPEMANDUAN GEOWISATA KAWASAN CAGAR ALAM GEOLOGI GUNUNGKIDUL: MENUJU KEBANGKITAN "THOUGHTFUL" INDONESIA Sri Mulyaningsih; Suhartono Suhartono; Nur Widi Astanto Agus Tri Heriyadi; Dina Tania
Jurnal Abdi Masyarakat Indonesia (JAMIN) Vol 3 No 1 (2021): JURNAL ABDI MASYARAKAT INDONESIA (JAMIN)
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1423.064 KB) | DOI: 10.25105/jamin.v3i1.8248

Abstract

Untuk menghadapi kenormalan baru sektor pariwisata di Gunungkidul Daerah Istimewa Yogyakarta, terkait pandemic covid-19, perlu disiapkan paradigma pariwisata yang berbasis konservasi dengan menyelaraskan antara kebutuhan para wisatawan dan kebutuhan masyarakat lokal. Konservasi tersebut meliputi unsur abiotic, biotik dan budaya, yang harus disosialisasikan kepada para pemandu, terutama pemandu lokal. Pengabdian kepada Masyarakat ini bertujuan untuk melakukan pendampingan kepada para pemandu wisata terkait dengan langkah konservasi tersebut, karena mereka adalah garda terdepan sektor ini. Pendampingan dilakukan meliputi sosialisasi, pelatihan kepemanduan (di dalam kelas dan lapangan), jejaring kerjasama antar pemandu local, dan strategi pemasaran dan promosi UGG Gunungsewu. Pendampingan dilaksanakan kepada sebanyak 40 pemandu local dari beberapa destinasi wisata dengan predikat Kawasan Cagar Alam Geologi (KCAG) di Gunungkidul, yaitu Gunung Api Purba Nglanggeran, Gunung Ireng, Gunung Gentong, Bioturbasi Kali Ngalang, Taman Batu Nglirong, Pantai Wediombo dan Sampang-Gedangsari. Melalui pendampingan ini, para pemandu kini memiliki kepemahaman tentang konservasi, sebagai bagian dari tujuan geopark; yang harus dilaksanakan untuk menjamin keberlanjutan terpenuhinya kebutuhan lingkungan, masyarakat local (social, ekonomi dan budaya) dan para wisatawan.
Karakteristik Lapisan Batubara pada Cekungan Bentarsari Terhadap Pola Sebaran Di Daerah Bentar Dan Sekitarnya Kecamatan Salem Kabupaten Brebes Nur Widi Astanto Agus Tri Heriyadi; Fivry Wellda Maulana; Alfi Firhandika
Jurnal Teknologi Vol 15 No 2 (2022): Jurnal Teknologi
Publisher : Jurnal Teknologi, Fakultas Teknologi Industri, Institut Sains & Teknologi AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/jurtek.v15i2.3626

Abstract

The Kaliglagah Formation in the Bentarsari area, Salem District, Brebes Regency, Central Java Province is included in the Bentarsari Basin. This formation is a coal-bearing formation in the Bentarsari Basin of Late Pliocene age and is composed of layers of claystone, sandstone and coal. The coal seams in this formation were analyzed megascopically to determine the type of characteristics based on taking outcrop profiles in the research area and analyzed using the Horne classification approach, 1978 so that the depositional environment and facies of the formation of the coal seams were found. The results of the two analyzes were then used to determine the characteristics and distribution patterns of the coal seams of the Kaliglagah Formation. Characteristics The coal seam in the study area was deposited in the Crevasse splay facies, in the transitional lower delta plain depositional environment according to Horne, 1978. The distribution pattern of coal with a northwest-southeast trend, the withdrawal of coal distribution obtained three seams, namely a seam with a thickness of 1.21 m at Lp 4 , seam b with a thickness of 0.82 m on Lp 4, on Lp 2 the thickness of the coal seam is 0.03 m on seam b upper, 0.02 m on seam b middle and seam c lower 0.1 m, and 0.04 m on seam b upper and 0.03 m on seam b lower Lp 5 and seam c with a thickness of 1.65 m on seam b upper and seam c lower on Lp 1.
PENERAPAN KECERDASAN BUATAN PADA PENILAIAN KELAYAKAN EKONOMI TAMBANG BATUBARA Sidiq, Hidayatullah; Heriyadi, Nur Widi Astanto Agus Tri
KURVATEK Vol 6 No 2 (2021): November 2021
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v6i2.2278

Abstract

The economic feasibility valuation method is very important in determining the value of a project. The existence of high uncertainty in the mining industry, both from a technical and non-technical perspective, causes the risk of mining projects to be relatively higher compared to other industries. uncertainty is modeled by an unbroken probability series. This distribution is widely used to model uncertainty from non-technical factors such as commodity prices. To describe the uncertainty of the variable input in the simulation, the monte Carlo simulation technique can be used. In addition, to predict the selling price of coal using the bat algorithm. The results show that the prediction of coal prices is one of the parameters that are difficult to predict. To determine the selling price can use a predictive approach with the help of artificial intelligence. The price prediction using the Monte Carlo simulation results in the selling price of coal with calories 5700 kcal/kg is $ 42.2 per tonne. If using the bat algorithm is $ 42.18 per tonne. The feasibility analysis of a mining project using the DCF method shows the result NPV Maximal on stripping ratio 2.5 with a coal volume is 20 million tonnes.
Co-Authors Alfi Firhandika Arie Noor Rakhman Dina Tania Dina Tania Dina Tania Dina Tania Dina Tania Dina Tania Dina Tania Fivry Wellda Maulana hidayatullah sidiq I Ketut Suada Muhammad Rivai Mulyaningsih, Sri Sri Mulyaningsih Suhartono Suhartono Suhartono Suhartono Suhartono Suhartono Suhartono