• Proceedings of the KSRS Conference
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• 2006.03a
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• pp.291-294
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• 2006

• Proceedings of the KSCN Conference
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• 1998.11a
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• pp.113-113
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• 1998

• Proceedings of the KSCN Conference
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• 1998.11a
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• pp.112-112
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• 1998

• Journal of the Speleological Society of Korea
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• v.16 no.17
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• pp.34-46
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• 1988

동굴은 분류하는 학자나 기준에 따라 다양하게 구분할 수 있는데 예를들면 형태성, 성인ㆍ상, 규모별, 위치별, 지질영역별, 생물생태상등으로 구분할 수 있다. 먼저 성태상으로는 석회동굴, 화산굴, 침식굴, 절리굴, 인공동굴 등으로 대별되는 그 중 침식굴은 해식굴과 하식굴로 다시 세분한다. 즉, 석회동굴은 협의로는 종유굴이라고 하는데 이른바 이차생성물인 종유석이 형성되어 있는 동굴을 가리킨다.(중략)

• Proceedings of the Speleological Society Conference
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• 2001.06a
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• pp.44-55
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• 2001

동굴은 그 생성의 원인이나 형성과정, 그리고 그 형태에 따라 달리 분류된다. 즉 자연동굴과 인공동굴로 대별되기도 하고, 석회동굴, 용암동굴 및 파식굴로 구분 될 수도 있다. 이와 같이 동굴은 그 형성과정 자체로서 많은 주변 학문과 긴밀히 연관되어 있다고 할 수 있다. 우선 석회동굴 및 용암동굴은 석회암 지역과 화산지역에 발달하므로 지질과 지형학 분야에 깊이 관련된다. (중략)

• Economic and Environmental Geology
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• v.40 no.1 s.182
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• pp.87-101
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• 2007

A variety of informations obtained from satellite image, digital elevation relief map (DEM), borehole logging, televiewer, geophysical prospecting, etc were synthetically analyzed to investigate subsurface geological and structural characteristics and to evaluate geohazard pertinent to fault-damage in the Busan metropolitan city. It is revealed that the geology is composed of the Cretaceous andesitic$\sim$dacitic volcanics, gabbro, and granitoid and that at least three major faults including the Dongrae fault are developed in the study area. Based on characteristics of topography, fault-fractured zone, and isobath maps of the Quaternary sediments and weathered residuals of the basement, the Dongrae fault is decreased in its width and fracturing intensity of damaged zone from south toward north, and the fault is segmented around the area between the Seomyeon and Yangieong junctions. Meanwhile, we drew a geohazard sectional map using the five major parameters that significantly suggest damage intensity of basement by fault, i.e. distance from fault core, TCR, RQD, uniaxial rock strength, and seismic velocity of S wave. The map is evaluated as a suitable method to express the geological and structural characteristics and fault-damaged intensity of basement in the study area. It is, thus, concluded that the proposed method can contribute to complement and amplify the capability of the present evaluation system of rock mass.

• The Journal of Engineering Geology
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• v.19 no.1
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• pp.43-50
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• 2009

A 3-D numerical analysis was carried out to observe potential effects of orientation of inherent weak zones to tunnel behaviors and stress distributions during tunnel excavation. Weak zones used for the analysis were placed at the upper 1D part from crown, on the crown and on the center of face, using orientations derived from the 6th RMR parameter for assessment of joint orientation effect on tunnel. Mechanical properties of rock mass were derived through a in-situ displacement measurement-based back analysis. Finally, a classification chart for crown settlement with five ranks based on orientation and location of weak zones is suggested.

• Tunnel and Underground Space
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• v.11 no.4
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• pp.311-318
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• 2001

RQD is used to evaluate the degree of fracture in the rock mass and is also used as input into rock mass classification scheme, such as RMR and Q-system. However there are some drawbacks of the RQD caused by anisotropy and calculation length. Thus it is important to understand the variation of RQD in 3-D space in order to evaluate the properties of rock mass. The main purpose of this study is to reveal the distribution of RQD in the equal-angle stereo net, to investigate the effects of scanline length and joint frequency and to inquire the effect on the selection of rock mass strength parameters in the numerical analysis. Analysis has been extended to field joint survey data using same method. The results can be applied to contribute for more accurate interpretation of the results of engineering geological survey for better design and construction work.

• Journal of the Korean earth science society
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• v.41 no.1
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• pp.40-47
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• 2020

The purpose of this study was to analyze the terms used in the Information Boards of Geosites at Jeonbuk West Coast National Geopark. Among the terms used in the Information Boards, nouns were extracted and listed based on the Standard Korean Language Dictionary, a glossary of earth and the data for the development of textbooks according to the 2015 revision of curriculum, by which eight types were classified. Seventy-one nouns (10.8%) of the extracted terms were not listed in any glossary. Most of these terms were compound words derived by combining [noun]+[noun] or [noun]+[affix] so that they were not easy to comprehend. In addition, two hundred fifty-six nouns (46%) of the terms were identified as jargons used in specific disciplines. Therefore, it is strongly suggested that when creating the National Geopark Information Boards, the academic jargon embedded terminologies be explained with annotation for general public visitors and students to understand without difficulty.

• Economic and Environmental Geology
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• v.54 no.5
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• pp.605-613
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• 2021

When crushing rocks to produce aggregates, solid stone dust or sludge is generated as a by-product. These by-products are classified as waste and are not utilized, and most of them are disposed of landfills. This by-product differs in mineral composition, chemical composition, and physical properties depending on the rock type and aggregate production process. Therefore, if a technology that can make good use of the inherent physical or chemical properties of by-products is developed, economic and environmental benefits can be achieved instead of disposal. In this study, stone dust and sludge were collected from domestic aggregate producers and physical and chemical properties were investigated by performing XRD mineral analysis, particle size analysis, and chemical analysis. In addition, the research trend was identified through a domestic and international research case studies on the use of stone powder and sludge.