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박삼규,김희준,Park, Sam Gyu,Kim, Hee Joon 대한자원환경지질학회 1994 자원환경지질 Vol.27 No.6
Resistivity Image Profiling has been applied to a geological survey in the Keoje-do area. Survey lines are located near the KD-02 and KD-06 wells in the area, where we have already sampled all rock cores and carried out several kinds of geophysical logs. In each site a resistivity cross-section is obtained by inverting pole-pole apparent resistivities. Comparing the reconstructed resistivity section with the rock cores and logging data obtained in the well provides a detailed picture of subsurface geology. The geology of KD-02 site is composed of conglomerate, sandstone and shale with fractures. The reconstructed resistivity image is useful for assessing the grade of weathering of these rocks. The KD-06 site is mainly underlain by granitic rocks, and its fresh basement can be delineated by resistivities over $1000{\Omega}{\cdot}m$.
PS검층에 의한 터널굴착에 따른 주변암반의 이완영역 평가
박삼규,김희준,Park, Sam Gyu,Kim, Hee Joon 대한자원환경지질학회 1998 자원환경지질 Vol.31 No.6
Excavation of underground openings changes stress distribution around the opening. The survey of this disturbed zone in excavation is very important to design and construct underground facilities, such as tunnel, gas and oil storage, power plant and disposal site of high- and low-level radioactive wastes. This paper presents a zoning of rock masses with tunnel excavation using PS logging. Compressional and shear wave velocities are measured in boreholes drilled in the tunnel wall, which was constructed with blasting and/or machine excavation. The disturbed zone in excavation can be estimated by comparing PS logging data with a tomographic image of compressional wave velocity and compressional and shear wave velocities of core samples. In the side wall of tunnel, the disturbed zone reaches 1.5 m and 1.0 m in thickness for blocks of blasting and machine excavations, respectively. In the roof of tunnel, however, the disturbed zone is 1.0 m and 0.75 m thick for the two blocks. These results show that the width of the disturbed zone is larger in the side wall of tunnel than in the roof, and 1.3 to 1.5 times larger for the blasting excavation than for the machine excavation.
박삼규,손정술,김정호,이명종,김재곤 한국자원공학회 2006 한국자원공학회지 Vol.43 No.5
이 연구는 폐광산 주변지역에 방치되어 있는 광미 적치장의 오염부지 조사에 전자 및 전기비저항탐사를 실시하여 그 적용성을 검토했다. 조사지는 오랫동안 방치된 금속 폐광산으로 광미가 풍화토 상부에 쌓여 있고 그 위가 주변의 흙으로 덮여져 있으며, 황철석의 산화작용으로 발생된 산성배수에 의해서 주변 소하천이 오염되어 있다. 이곳의 광미 적치장은 전기전도성이 높은 황철석을 포함하고 있어 광미 적치장 바깥쪽의 지층에 비하여 전기비저항이 낮게 나타나고 있다. 따라서 전자 및 전기비저항탐사 결과로부터 상대적으로 낮은 전기비저항대가 광미 적치장과 일치하고 있으며 적치장 내부에서 실시한 토양시료의 주상도와도 잘 일치함을 알 수 있었다. 이것으로부터 전자 및 전기비저항탐사가 폐광지역의 오염부지 조사에 유효함을 알았다.서론 In this study, we examined the applicability of electromagnetic (EM) and direct current (DC) resistivity surveys to assess mine wastes in abandoned metallic mining area, located at Changwon in Korea. Mine wastes are widely deposited on weathered soils overlain by the embankment layer in the area of the field site where the neighboring streams have been contaminated by acid mine drainage. The almost all of mine wastes in the studied area contained a significant amount of pyrite. Thus, mine wastes have low electrical resistivity compared with the surrounding geologic media. The results of the study have shown that the zones of low resistivity is corresponding to the zones of the mine wastes area confirmed by the logging data. The EM and DC resistivity surveys was successfully applied for the assessment of the abandoned mine.
비자립 시추공 전기비저항 토모그래피탐사를 위한 접지전극 고안
박삼규,김정호 한국지구시스템공학회 2007 한국지구시스템 공학회지 Vol.44 No.6
시추공을 이용한 전기비저항 토모그래피탐사는 석회암 공동조사에 널리 사용되고 있다. 그러나 지표부근에 분포하고 있는 석회암 공동은 시추 공벽 붕괴를 방지하기 위하여 PVC 케이싱을 설치하기 때문에 전기비저항 토모그래피탐사 자료를 얻지 못하는 어려움이 있다. 이러한 문제점을 해결하기 위하여 아크릴 파이프 바깥 면에 얇은 동판을 부착하여 시추공벽에 접지시키는 전기비저항 토모그래피 전극을 고안하였다. 이 접지전극을 석회암 공동이 분포하고 있는 지역의 시추공에 설치하여 전기비저항 토모그래피탐사를 실시하여 자료를 획득하고, 역해석 과정을 통해서 시추공간의 전기비저항 토모그램 영상을 얻었다. 시추공벽이 무너지는 비자립 구간인 풍화토 및 파쇄대, 석회암 공동부는 100 ohm-m 이하의 저비저항이 분포하고 있으며, 시추조사 및 표준관입시험 결과로부터 확인할 수 있었다. 본 연구에서 제안한 접지전극은 석회암 공동지역 뿐만 아니라 연약지반, 토양오염 지역 등의 비자립 시추공의 전기비저항 토모그래피용 전극으로서 유용하게 사용될 것이다.
박삼규 대한자원환경지질학회 1999 자원환경지질 Vol.32 No.2
The water leakage of reservoir embankment usually occurs through water vein, which gives little influence on the embankment in a normal state. However, the embankment can be destroyed when the water level of reservoir increases with heavy rain in summer. Investigating the water vein and its path is therefore very important from the viewpoint of disater prevention and embankment protection. This paper presents survey results of one-meter-depth ground temperature and multi-point temperature logging in an embankment in Japan to delineate water veins and permeable formations. Four water veins have been predicted in the embankment by comparing measured one-meter-depth ground temperatures with the background ones which have no effect of water vein. The multi-point temperature logging was carried out in the borehole drilled at one of the predicted water veins. Depth and thickness of the permeable formation in the borehole can be determined from temperature restoration ratios with elapsed time. From these results we can find that the water leakage of reservoir embankment mainly occurs in sandy soil formation in the embankment.