• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2005년도 춘계 학술발표회 논문집
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• pp.825-830
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• 2005

Cut slope and facility of management investigation is the protection of humans and properties. it is very important the prevention of disaster facility and the damage of the slope protection facility. It is very difficult to forecast slope stability, disaster possibility and collapse. It will be able to minimize the damage which it prepare against slope facility and cut slope of deformable investigation and collapse and the disaster. therefore those deformable investigation is important. Investigations execute upheaval, crack, sliding for slope and cut slope reinforcement. Investigation executes forecast in place where the construction problem, the effect which the damage in road traffic or the contiguity facility.

• International Journal of Safety
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• 제11권1호
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• pp.15-18
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• 2012

Because of development of printing technology, toner cartridge particle becomes smaller and more dangerous. And sometimes we had incidents with dust explosion of toner cartridge particle at recycling facilities in Japan. Therefore we studied on hazard of toner particle relating with dust explosion. We found that toner particle is so dangerous compared with most organic solids, even though it does not belong to hazardous materials in the UN regulation and the Japanese Fire Service Law.

• Water Engineering Research
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• 제4권4호
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• pp.187-192
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• 2003

The rainfall observation systems have largely been improved in Japan. The Japan Meteorological Agency, prefecture governments, and other administrative bodies have also increased the number of rain gauges thru out the country. The density of observatories is now one per several $\km^2$. Heavy rainfall information systems have been improved. Besides it, the Internet was popularized in the late 1990s, and has been used to transmit data of heavy rainfall. Internet accessible cellular phones have been popular in Japan since 1999. Such phones are expected to be useful in the field of disaster warning announcements, because they can automatically notify users bye-mail of pending disasters. The use of the Internet during natural disasters is groundbreaking in Japan today. However, in order to use disaster information effectively on Internet it is necessary to investigate how to use the information during the rainfall disaster. Therefore in our study we suggest methods on the effective construction and their use of information technology on Internet.

• 한국연안방재학회지
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• 제5권4호
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• pp.203-210
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• 2018

It is generally known that submerged breakwaters can reduce the incoming wave energy without disturbing the beach scenery. However, a submerged breakwater is also able to cause a setup of the sea level in the protected area which is also called as water piling-up. Since the piling-up can result in longshore currents, sediment transports, and unexpected beach erosion, understanding about the piling-up process is required prior to designing the nearshore structures. In this study, the water piling-up behind a submerged breakwater is assessed in the time of storm events. For the study area, Anmok beach in Gyeonso-dong, Gangwon-do is selected. 1-year, 5-year, 10-year, and 50-year return-values were derived from Peaks-Over-Threshold(POT) method and those are applied as offshore boundary conditions for the numerical simulation. The numerical results of the piling-up were assessed with regard to the wave steepness and the height of the submerged breakwater. With increase of both significant wave height and the height of the submerged breakwater, the piling-up parameter is also increased which can lead to erosion of dry beach behind the structure.

• 한국재난정보학회 논문집
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• 제13권1호
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• pp.118-129
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• 2017

본 논문에서는 우리나라의 익사사고의 특징을 분석하고 익사사고를 줄이기 위한 방법에 대하여 검토한다. 우리나라는 바다보다 하천, 호수 등 내륙에서 익사사고가 더 많이 발생하고 있다. 또한 사고 발생시 체계적인 신고 및 구급 활동이 이뤄지고 있으나 사고 예방에 있어서는 관리 인력의 부족, 위험지역에 대한 지속적인 모니터링의 어려움 등의 문제가 있다. 이러한 익사사고 예방 및 관리부족의 문제를 해결하기 위해서는 지자체의 역할이 중요하며, ICT기술을 활용하여 원격으로 위험지역을 감시 및 통제기술의 개발이 효과적이다.

• 한국지리정보학회지
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• 제19권1호
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• pp.180-196
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• 2016

재난의 피해를 최소화하기 위하여 예방, 대비, 대응 등의 다양한 측면에서 관리 하고 있다. 예방과 대비가 잘 되어있더라도, 자연재해와 같은 불가항력의 재난에 대해서는 예상과는 다른 피해가 생길 수도 있다. 따라서 통합적 재난 관리를 위해서 신속한 재난 관리 및 예측을 기반으로 동일한 재난정보 공유가 가능한 시스템을 구축 개발하여야 한다. 특히, 신속한 재난 대응을 위해서는 유관기관 및 현장공무원과 같은 직접적인 방재 투입 인력 간의 동일한 정보공유가 필요하다. 최근에 활용되는 재난 관리 시스템의 경우 고용량의 지리정보를 사용하거나, 정확한 재난 예측을 위해 다양한 인자들을 활용하여 구축된다. 그뿐만 아니라, 최근 구축 및 연구되고 있는 3D GIS를 활용할 경우 하드웨어 등의 문제로 인해 시스템을 사용하지 못하는 경우도 발생한다. 따라서 예측 시뮬레이션을 하여 대응 정보를 확보한다고 해도, 상황에 따라 시스템을 활용 불가한 경우 혹은 해당 정보의 확장자를 읽을 수 없는 환경일 경우에 본질적으로 공통된 정보를 공유하기는 힘들다. 따라서 본 연구에서는 재난 대응을 위한 시스템을 구축하고, 그를 기반으로 공유된 정보가 공통된 정보에 준할 수 있도록 신속하고 정확한 정보를 제공하는 체계를 구축하고자 한다. 이를 통해 기존 재해 대응 시간을 앞당기고, 신속한 대응을 통해 의사결정을 지원하여 인적 물적 피해를 최소화할 수 있다.

• Structural Engineering and Mechanics
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• 제66권3호
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• pp.411-421
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• 2018

Although a rubber isolation cushion can reduce the dynamic response of a structure itself, it has little influence on the height of a sloshing wave and even may induce magnification action. Vertical baffles are set into a base-isolated Concrete Rectangular Liquid Storage Structure (CRLSS), and baffles are opened as holes to increase the energy dissipation of the damping. Problems of liquid nonlinear motion caused by baffles are described using the Navier-Stokes equation, and the space model of CRLSS is established considering the Fluid-Solid Interaction (FSI) based on the Finite Element Method (FEM). The dynamic response of an isolated CRLSS with various baffles under an earthquake is analyzed, and the results are compared. The results show that when the baffle number is certain, the greater the number of holes in baffles, the worse the damping effects; when a single baffle with holes is set in juxtaposition and double baffles with holes are formed, although some of the dynamic response will slightly increase, the wallboard strain and the height of the sloshing wave evidently decrease. A configuration with fewer holes in the baffles and a greater number of baffles is more helpful to prevent the occurrence of two failure modes: wallboard leakage and excessive sloshing height.

• Geomechanics and Engineering
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• 제36권5호
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• pp.427-440
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• 2024

This study concentrates on the 301 comprehensive caving working face, notable for its considerable mining height. The roof model is established by integrating prior geological data and the latest borehole rock stratum's physical and mechanical parameters. This comprehensive approach enables the determination of lithology, thickness, and mechanical properties of the roof within 50 m of the primary mining coal seam. Utilizing the transfer rock beam theory and incorporating mining pressure monitoring data, the study delves into the geometric parameters of the direct roof, basic roof movement, and roof pressure during the initial mining process of the 301 comprehensive caving working face. The direct roof of the mining working face is stratified into upper and lower sections. The lower direct roof consists of 6.0 m thick coarse sandstone, while the upper direct roof comprises 9.2 m coarse sandstone, 2.6 m sandy mudstone, and 2.8 m medium sandstone. The basic roof stratum, totaling 22.1 m in thickness, includes layers such as silty sand, medium sandstone, sandy mudstone, and coal. The first pressure step of the basic roof is 61.6 m, with theoretical research indicating a maximum roof pressure of 1.62 MPa during periodic pressure. Extensive simulations and analyses of roof subsidence and advanced abutment pressure under varying working face lengths. Optimal roof control effect is observed when the mining face length falls within the range of 140 m-155 m. This study holds significance as it optimizes the working face length in thick coal seams, enhancing safety and efficiency in coal mining operations.

• Computers and Concrete
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• 제21권2호
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• pp.181-187
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• 2018

In order to solve the life prediction problem of damaged coating steel bar in magnesium cement concrete, this study tries to establish the marginal distribution function by using the corrosion current density as a single degradation factor. Representing the degree of steel corrosion, the corrosion current density were tested in electrochemical workstation. Then based on the Copula function, the joint distribution function of the damaged coating was established. Therefore, it is indicated that the corrosion current density of the bare steel and coated steel bar can be used as the boundary element to establish the marginal distribution function. By using the Frank-Copula function of Copula Archimedean function family, the joint distribution function of the damaged coating steel bar was successfully established. Finally, the life of the damaged coating steel bar has been lost in 7320d. As a new method for the corrosion of steel bar under the multi-dimensional factors, the two-dimensional Copula function has certain practical significance by putting forward some new ideas.

• 한국지반환경공학회 논문집
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• 제14권9호
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• pp.49-56
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• 2013

우리나라의 지난 33년간 지진발생 추이를 보면 3.0 이상의 지진이 연간 평균 약 9회에 걸쳐서 일어나고 있으며, 지진의 진앙지 역시 해안가에서 내륙지방 쪽으로 이동하고 있다. 이처럼 지진 발생 가능성이 높아짐에 따라 지진방재용 통합 지하공간정보활용이 필요한 시점이다. 현재는 지진 재해 취약지역의 지질 및 지반 특성 파악 자료가 부족하므로, 전국 단위로 신규 지질, 지반조사 자료를 수집하고 기존의 지하공간정보와 공동 활용을 통한 지진방재계획 수립이 필요하다. 본 연구에서는 지진 방재를 위하여 요구되는 지하공간정보 DB의 구축범위를 결정하고, 지하공간정보의 정적 및 동적 DB에 대한 구축방안을 제시하였다. 또한, 구축된 지진 방재를 위한 지하공간정보의 활용방안을 제시하였다. 본 연구를 통하여 지진방재를 위한 지하공간정보 DB의 범위, 구축 및 활용 방안의 수립으로 구축되는 지진방재용 지하공간정보는 소방방재청의 지진 및 급경사지 방재를 위한 지하공간정보 및 급경사지정보 통합관리시스템의 기반 데이터베이스로 활용될 예정이다.