• The Journal of Engineering Geology
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• v.23 no.1
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• pp.19-27
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• 2013

Deformation of a slope at a coal waste depot and the natural slope under the depot was surveyed and investigated at Dogye village in Samcheock city, Gangwon Province. To investigate the behaviors of the slopes, wire sensors and a rain gauge were installed on the crest of the waste depot slope and inclinometers were installed in the natural slope. The results of deformation monitoring at the crest of the waste depot slope using wire sensors revealed increased deformation with increasing cumulative rainfall. The results of monitoring horizontal deformation of the natural slope revealed that maximum horizontal deformation was also affected by cumulative precipitation. However, the groundwater level at the natural slope showed no change with rainfall. These measurements confirm that deformation at coal mine waste depots is closely related to precipitation, indicating that self-loading at such depots increases with rainfall infiltration, thus causing deformation of the waste depot slope. In addition, increasing the self-load of the coal mine waste depot may cause deformation of the underlying natural slope.

• Magazine of the Korea Concrete Institute
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• v.14 no.6
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• pp.22-31
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• 2002

콘크리트 블록에는 속빈 콘크리트 블록, 치장 콘크리트 블록, 형틀 콘크리트 블록, 콘크리트 적층 블록 등이 있고, 콘크리트 적층 블록을 제외하면 모두 건축용으로 널리 쓰이는 재료이다. (1) 속빈 콘크리트 블록 속빈 콘크리트 블록이란 보강근을 삽입하는 속빈 부분을 갖고, 블록 벽체로 외력을 부담하는 것을 말한다. 속빈 콘크리트 블록은 건물의 경량화와 시공 기간의 단축이 가능하기 때문에 (그림 1)과 같이 벽체용으로 사용되거나 또는 칸막이용 등으로 많이 사용되는 대표적인 조적재이다 (2) 치장 콘크리트 블록 치장 콘크리트 블록은 철근으로 보강할 수 있는 공동이 있고, 미리 표면에 연마, 절삭, 씻어 내기, 쪼아 내기. 스플릿, 슬럼프, 리브붙임 등의 치장 마무리가 되어 있는 블록을 말한다. 도장 또는 착색만에 의한 치장 블록은 포함하지 않고 있다. 치장 블록은 주로 (그림 2)와 같이 담장에 많이 사용되고 있다. (3) 형틀 콘크리트 블록 형틀 콘크리트 블록은 형틀 콘크리트 블록조에 사용되는 것을 형틀 콘크리트 블록조란 형틀 블록을 조합하여 형틀로 하고, 그 중공부에 철근을 배치하고 콘크리트를 타설하여 내력벽을 형성하는 건축구조를 말한다. 형틀 블록을 조적한 후 외부에 나타나는 면에는 스플릿, 연마, 절삭, 씻어 내기, 쪼아 내기 등의 치장을 하기도 한다.(중략)

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2004.09a
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• pp.385-389
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• 2004

임기납석광산 폐석적치장 상부의 계곡수로부터 폐석적치장 하부인 수영강 합수지점까지 수계를 따라 물시료 12개 지점을 대상으로 수질 및 안정동위원소 분석을 수행하였다. 폐석적치장으로부터 pH가 2.83이고 Fe, Al, Mn 등으로 심하게 오염된 산성배수가 유출되어 계곡수를 오염시키며 수계의 수질은 $Ca^{2＋}$-SO$_{4}$$^{2－}$ 형태로 변화되고 폐석적치장 주변 수로에 적화현상을 유발하고 있다. 또한 안정동위원소 분석결과 임기납석광산 인근 수계에 가장 큰 오염부하를 유발하는 요소인 침출수(산성배수)의 기원은 강수기원으로 판단된다. 이는 폐석침출수 오염원 평가 및 처리에 유용한 자료로 이용 될 수 있을 것이다.

• 레미콘
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• no.4 s.71
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• pp.8-17
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• 2002

• Smart Media Journal
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• v.13 no.2
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• pp.52-61
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• 2024

In the shipyard, aerial images are acquired at regular intervals using Unmanned Aerial Vehicles (UAVs) for the management of external storage yards. These images are then investigated by humans to manage the status of the storage yards. This method requires a significant amount of time and manpower especially for large areas. In this paper, we propose an automated management technology based on a semantic segmentation foundation model to address these challenges and accurately assess the status of external storage yards. In addition, as there is insufficient publicly available dataset for external storage yards, we collected a small-scale dataset for external storage yards objects and equipment. Using this dataset, we fine-tune an object detector and extract initial object candidates. They are utilized as prompts for the Segment Anything Model(SAM) to obtain precise semantic segmentation results. Furthermore, to facilitate continuous storage yards dataset collection, we propose a training data generation pipeline using SAM. Our proposed method has achieved 4.00%p higher performance compared to those of previous semantic segmentation methods on average. Specifically, our method has achieved 5.08% higher performance than that of SegFormer.

• Magazine of the Korea Concrete Institute
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• v.14 no.5
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• pp.15-20
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• 2002

갱폼이라 함은 주로 고층 아파트에서와 같이 평면상 상ㆍ하부 동일 단면 구조물에서 외부벽체 거푸집과 거푸집 설치ㆍ해체작업 및 미장ㆍ치장(견출) 작업발판용 케이지(cage)를 일체로 제작하여 사용하는 대형 거푸집을 말한다. 여기서 케이지는 갱폼에서 외부벽체 거푸집 부분을 제외한 부분으로 거푸집 설치ㆍ해체작업, 후속 미장, 치장(견출) 등 작업을 안전하게 수행하는데 필요한 작업발판, 안전난간 등으로 구성되어 갱폼 거푸집에 결합된 부분이며, 상부 케이지는 갱품 케이지의 4단 작업발판 중 거푸집 설치ㆍ해체작업용으로 사용되는 상부 2단 작업발판 구성 부분이고, 하부 케이지는 미장ㆍ치장(견출) 작업용으로 사용되는 하부 2단 작업발판 구성 부분을 말한다.(중략)

• Digital Contents
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• no.11 s.90
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• pp.20-24
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• 2000

'각종 미디어에 담긴 내용물'로 개념 정리된 디지털콘텐츠가 '꺼리정보' 또는 '꺼리문화'의 집합체로 떠오르면서 이제는 고유명사의 자리를 내주고 보통명사로 감등된 대신 자연스럽게 콘텐츠 산업을 형성하기 시작했다. it기술에 힘입어 광속의 디지털 경제체제가 형성되면서 하루가 다르게 콘텐츠 산업은 비즈니스 실제로 모습을 드러내고 있다. 마치 무지개가 찬란한 일곱 색깔로 치장하듯 콘텐츠 산업의 7대 메뉴는 이제 돈이 되는 빛깔로 치장하면서 새롭게 태어나고 있다.

• Journal of the Korean GEO-environmental Society
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• v.5 no.4
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• pp.13-24
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• 2004

This study was carried out to plan the prevention of the generation and discharge of Acid Rock Drainage (ARD). The Acid Base Accounting(ABA) test was performed for geological materials such as pit wall, waste rock and stream sediments near the Imgi abandoned pyrophyllite mine in Busan, Korea. In addition, hydraulic characteristics were tested with the disk tension infiltrometer around the waste rock dump. Maximum Potential Acidity(MPA) of geological materials near the Imgi mine was 246.942kg $H_2SO_4/t$, and maximum Acid Neutralising Capacity(ANC) was 8.7kg $H_2SO_4/t$. These results indicate the pit wall and waste rock, except most of stream sediments are acid generating geological materials. These have salt and free hydrogen ion which resulted from oxidation of sulfides. Hence they could be convert rain water to acid rock drainage. Although the waste rock dump of the Imgi mine have very low infiltration rate, slopes of the waste rock dump have many "V" type erosion gullies and multi-layers. These gullies and multi-layers have coarse clastic particle layers which have very large hydraulic conductivity. Through this coarse clastic particle layer a large part of rain flow into ground. And also this layer could function as aeration path which induced oxidation of sulfide minerals and generation of ARD continuously.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.04a
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• pp.89-92
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• 2008

This study investigates the shear behavior of architectural masonry veneer wall reinforced with specific reinforcement details proposed by this study. For this purpose, experimental tests were conducted using one un-reinforced masonry(URM) wall specimen and three reinforced masonry(RM) wall specimens under quasi static cyclic loads. Un-reinforced(plain) masonry wall is expressed that behavior and failure mode are different for aspect ratio(L/H) and axial compressive force. The test variables are wall aspect ratio and presence of reinforcement. These specimens are masonry structure for architectural clading that is not to exist the axial compressive force. thus the axial compressive force is excepted from test variable. Test result, Behavior of specimens are dominated over rocking mode, but final failure modes are combined with different behaviors. And FEMA273 has proposed the equation of shear strength of masonry pier subjected to in-plane loading. Shear strength equations are classified four types of failure mode that is Rocking, and Toe-Crushing, Bed-Joint-Sliding and Diagonal-Tension. FEMA273 equations predict the behavior modes well, but shear strength is shown in different result.

• The Journal of Engineering Geology
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• v.28 no.3
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• pp.411-429
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• 2018

Daeyoung mine (also called "Daema mine") produced gold and silver from mainly gold- and silver-bearing quartz veins. The mine tailings are a waste hazard, but most of the tailings were swept away or dispersed throughout the area around the mine long before the tailing dump areas were transformed into agricultural land. Soil liner and protection facilities, such as retaining walls, were constructed in the mine area to prevent the loss of tailings. The content of the tailings is 3,424.41~3,803.61 mg/kg, which exceeds the safety standard by a factor of 45. In addition, contamination was detected near agricultural areas and in the sediments in downstream drainage channels. A high level of As contamination was concentrated near the waste tailings yard; comparaable levels were detected in agricultural areas close to streams that ran through the waste dump yard, whereas the levels were much lower in areas far from the streams. The contamination in stream sediments showed a gradual decrease with distance from the mine waste yard. Based on these contamination patterns, we concluded that there are two main paths that affect the spread of contaminants: (1) loss of mine waste, and (2) the introduction of mine waste into agricultural areas by floods after transportation by streams. The agricultural areas contaminated by mass inflow of mine waste can act as contamination sources themselves, affecting other agricultural areas through the diffusion of contaminants. At present, although the measured effect in minimal, sediments in streams are contaminated by exposed mine waste and surface liners. It is possible for contaminants to diffuse or spread into nearby areas if heavy elements trapped in soil grains in contaminated agricultural areas leach out as soil solution or contaminant particles during diffusion into the water supply.