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All Journal Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII
Erwin Wijaya, Andy
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Estimasi Sumberdaya Pit 1 Blok Selatan dengan Metoda Silcular 5015-2019 Daerah Puruk Cahu Kalimantan Tengah Asep Tri Herdianto; Erwin Wijaya, Andy
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Coal is one of the energy minerals found in Indonesia with significant potential, particularly in Kalimantan. The objective of this research is to calculate a more accurate estimate of reserves in the study area with a thickness range of 1-1.2 meters. The distribution of the seam generally follows a pattern from Northeast to Southwest with a moderate dip angle of 70-80 degrees. Based on SNI 5015-2011, the geological complexity of the study area falls into the “Complex” category according to SNI 5015-2019 due to the steep inclination of the rock layers. The estimation of coal resources using the Circular Method, aided by software, yielded the following results: measured coal resources of 1,127,778.23 tons, indicated resources of 2,024,364.08 tons, and inferred resources of 2,948,000.06 tons.
Kualitas Air Tanah Sumur Gali Dangkal pada Batugamping Sentolo Daerah Balecatur Bagian Selatan, Kapanewon Gamping Widiyaningsih, Harti; Erwin Wijaya, Andy
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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The research location is in the southern part of Balecatur Village, Kapanewon Gamping. This research aims to determine the quality of groundwater in shallow dug wells located in limestone lithology. The research method used is to use primary data through direct measurement observations in the field and sample testing in the laboratory as well as secondary data to see the quality of ground water in the research area. Based on the results of observations of visual physical descriptions and measurements in the field of color, taste, smell, temperature, pH, TDS at 6 well observation locations, the water generally shows that it is suitable, while based on the analysis of physical and chemical parameters in 2 samples with water quality standards for hygiene purposes and sanitation RI Minister of Health Regulation no. 2 of 2023, samples showed that dug well water had values ​​that exceeded the TDS standard (<300 mg/l) in all observed wells with values ​​between 408 – 601mg/l and color in the Sum-1 well. This TDS value exceeds the quality standard, it is possible for water to be in a well with limestone lithology, because the nature of limestone is easily soluble so that some minerals dissolve in water such as lime (calcium carbonate) and the condition of well water stored in the well for a long time is affected by rock weathering.
Analisis Respon Hidrogeologi terhadap Stress Saat Terjadi Gempabumi (Studi Kasus Semburan Lumpur Setelah Gempa Tasikmalaya 2009 dan Pidie Jaya 2016) J. Sinipar, Dimas Salomo; Erwin Wijaya, Andy; T. Listyani R.A.
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Tectonic earthquakes often cause hydrogeological responses such as mudflows, but the mechanism by which stress during an earthquake triggers such responses is still unclear. The 2009 Tasikmalaya earthquake (M7.0), for example, triggered a mudflow in Pasirgede Village, Sukahening District, Tasikmalaya Regency, West Java. Another example is the 2016 Pidie Jaya, Aceh earthquake (M 6.5), which also triggered a mudflow in Meunasah Balek Village, Meureudu District, Pidie Jaya Regency, and in Benih Tamiang Village, Rantau District, Aceh Tamiang Regency. In this study, an investigation was conducted on volumetric strain, normal stress, and dynamic stress changes from tectonic earthquakes at the site location experiencing hydrogeological responses. The results show that the hydrogeological response is more caused by dynamic stress changes by seismic waves generated by the tectonic earthquake. This study is useful for understanding the hydrogeological response to stress that occurs during earthquakes, especially in relation to mitigating disaster events..
Blending Plan Batubara Sulfur Tinggi dengan Kandungan Sulfur Rendah Sudrajat, Asep; Erwin Wijaya, Andy
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Blending coal is one of the methods to optimize the characteristics of coal by mixing coal of various qualities. This research aims to reduce the sulfur content in high-calorie coal with high sulfur content, using low-calorie coal with lower sulfur content. With this method, it is expected to produce a coal mixture with lower sulfur content, without significantly sacrificing calorific value, and to increase the market acceptance of coal with more environmentally friendly sulfur content.
Co-Authors Asep Tri Herdianto J. Sinipar, Dimas Salomo Sudrajat, Asep T. Listyani R.A. Widiyaningsih, Harti