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권상기,주창규 한국자원공학회 2020 한국자원공학회지 Vol.57 No.1
Mining development in most countries requires royalty payments. In this study, mining royalty regulations in foreign countries were surveyed to aid exploration of mineral resources in these countries. Royalty rates and systems in Canada, Australia, and African, Asian, and South American countries were investigated and used to consider the mining industry characteristics. Ad valorem royalty, based on gross revenue, was the most popular system in many countries. Various parameters, such as mineral type, ore grade, price, profit, annual production, mining method, mining depth, and level of mineral processing, were considered to determine the royalty rates and systems. 대부분의 국가에서 광물 개발을 위해서는 조광료를 지급하여야 한다. 본 연구에서는 세계 각국에서 적용되고 있는 조광료의 기준을 살펴봄으로써 해외 광물 자원개발에 도움이 될 수 있도록 하였다. 캐나다, 호주, 미국을 비롯하여 아프리카, 아시아, 남미국가들에서 적용하고 있는 조광료 방식 및 조광료율을 조사 분석하였다. 세계 각국에서는 자국의 특성에 맞는 조광료율을 책정하고 있으며 광물 생산액을 기준으로 하는 광물생산액 기준 조광료(ad valorem) 방식이 세계 여러 나라에서 가장 널리 사용되고 있으며 국가에 따라 광물의 종류, 품위, 가격, 이윤, 생산량, 채광법, 광산의 심도, 광물처리의 정도 등 다양한 요소들을 고려하여 조광료율을 선정하고 있다.
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고준위방사성폐기물 처분 기술개발을 위한 세계 각국 지하연구시설에서의 현장시험
권상기,김형목 한국자원공학회 2017 한국자원공학회지 Vol.54 No.4
It is an urgent issue to develop methods for the safe management of the high-level radioactive waste(HLW) produced from the operation of nuclear facilities for sustainable utilization of nuclear energy. In the countries utilizing nuclear energy, underground research laboratories(URLs) were constructed and operated for the development of HLW disposal technique. In this study, a literature survey was carried out for summarizing the status of URLs in the foreign countries and in situ experiments carried out at the URLs. 원자력시설의 운영 과정에서 발생하는 고준위방사성폐기물의 안전한 관리 방안을 개발하는 것은 원자력에 너지의 지속적인 활용을 위해 시급한 과제이다. 원자력에너지를 이용하는 세계 각국에서는 고준위처분 기술 개발을 위해 지하연구시설을 건설, 운영하고 있다. 본 연구에서는 세계 각국의 주요 지하연구시설 현황과 수행된 현장시험들 에 대한 조사를 실시하였다
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Analysis of time-dependent deformation measured at deep underground openings
권상기 한국자원공학회 2013 Geosystem engineering Vol.16 No.4
The understanding of time-dependent deformation of rock around underground excavations becomes more and more important with the increase in overburden stress, opening size, and temperature expected in deep underground facilities for various purposes. It is desirable to use in situ measurements instead of laboratory data, because of the difference in timedependent deformation mechanisms observed in laboratory and in situ measurement. In this study, the deformation measurements from Waste Isolation Pilot Plant, which is a deep underground radioactive waste repository in rock salt and a salt mine, in which yield pillar mining design was adopted, were extensively analyzed. It was possible to determine that the transition time from the primary to the secondary creep stages was around 200 – 300 days. The influence of adjacent excavation on the deformation measurement could be clearly observed. It was also found that the measuring time interval was important to understand the time-dependent deformation mechanisms.
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Thermo-mechanical coupling analysis for DECOVALEX-2011 Task B, A¨ spo¨ pillar stability
권상기,이창수,전석원 한국자원공학회 2012 Geosystem engineering Vol.15 No.2
Korea participated in DECOVALEX-2011, which is an international cooperation project for enhancing the reliability of computer simulations under the conditions of radioactive waste repositories, and modeled the laboratory compression tests and the in situ A¨ spo¨ pillar stability experiment (APSE). From the comparison of the results with foreign research teams, it was possible to enhance the reliability of the computer simulation of the complex thermo-mechanical (TM) coupling behavior of rock mass. It was found that the two-step simulation with a full model and a submodel using FLAC3D was effective to combine the influence of in situ stress, tunnel excavation, deposition hole drilling, confining pressure, and thermal loading all together. One of the important results was the estimation of spalling strength of A¨ spo¨ granite as 120 MPa after comparing the notch depth, notch length, and breakout angle of the notch with actual observation.
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