• Geomechanics and Engineering
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• v.36 no.1
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• pp.27-37
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• 2024

The roof-filling body system stability plays a key role in gob-side entry retained (GER). Taking the GER of the 1103 belt transportation roadway in Heilong Coal Mine as engineering background, stability analysis of roof-filling body system was conducted based on the cusp catastrophe theory. Theoretical results showed that the current design parameters of 1103 belt transportation roadway could ensure the roof-filling body system stable during the resistance-increasing support stage of the filling body and the stable support stage of the filling body. Moreover, a verified global numerical model in FLAC3D was established to analyze the failure characteristics including surrounding rock deformation, stress distribution, and plastic zone. Numerical simulation indicated that the width-height ratio of the filling body had a great influence on the stability of the roof-filling body system. When the width-height ratio was greater than 0.62, with the decrease of the width-height ratio, the peak stress of the filling body gradually decreased; when the width-height ratio was greater than 0.92, as the distance to the roadway increased, the roof stress increased and then decreased. The theoretical analysis and numerical simulation findings in this study provide a new research method to analyze the stability of the roof-filling body system in GER.

• Proceedings of the KSR Conference
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• 2004.10a
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• pp.308-327
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• 2004

As use of tunnels and subways increase there also are accidents proportionate to it. Daegu Subway Station fire, Hongjimoon tunnel fire led people to be conscious of disaster protection and as a result, there is a trend to adopt standards for fire protection. Accordingly, this thesis is focused on investigating various fire and water protection related issues for subaqueous tunnel under Ran river. The thesis developed evacuation and disaster prevention plan as fire level increases and have identified the suitability of disaster prevention through evacuation and fire simulation, countermeasure of a water leakage during construction and operation considering the subaqueous tunnel. And we selected EPB shield TBM equipment considering the ground condition and effect of boring hole, and accomplished reasonable water protection design through setting goals using event-tree method, as well as examining model test of boring hole and flooding in heavy rain. Also included structured total system consist of water leakage sensing system, water protection gate, pumping system and fire protection system to respond systematically in emergency.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.29 no.1
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• pp.253-260
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• 2005

Recently, the storms which hit Korean Peninsula are getting bigger, and the damages from the storms are wide spreaded. Thus, and approach with disaster prebention to offshore area and/or opened island area is neccessary. The existing wave design parameter was calculated with linear regular wave models inputting deep water design wave or wind sources. so it wasn't able to deal with wind-induced waves, interactions with waves, and redistribution of wave energy simultaneously. In this study, we made numerical simulation with SWAN(Simulation Waves Nearshore) Model which can consider development of waves and winds and their interference. The result from this model shows much different with those from existing model's. so the result from this study, especially in this modeling area, could be used for harbor design and coastal disaster prevention field in the future.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.9 no.3
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• pp.1-16
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• 2006

The purpose of this study is to develop design model of ecological park as stormwater storage facilities. The results are as follows : First, the design model of ecological park as stormwater storage facilities consider ecological and landscape characteristics such as high efficiency of land use, function as disaster prevention, ecological water purification, formation of habitat for flora and fauna. Second, this study demonstrates two types of plane structure and eight types of designed section. They can be combined and designed depending on conditions of each site. The facilities of stormwater storage conduct disaster prevention system and ecological park. Retention pond in stormwater storage facilities for ecological park also should be made for ecological restoration in the site. Third, the ecological park provide the basis for ecological network from in-site to out-site. Therefore its conservation and restoration plan consider the ecosystems of the site. Fourth, the most important factor for maintenance and management for retention pond is keeping water quality. Sustainable Structured wetland Biotop system is suggested for ecological water purification system in the retention pond which is one of the constructed wetland system using multi-celled aquatic plant and pond. This system can also provide habitat for animals and plants, water friendly park for men, and beautiful landscape.

• International journal of advanced smart convergence
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• v.10 no.4
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• pp.117-123
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• 2021

This study aims to analyze working hours of sprinkler heads when a fire occurs at an indoor gymnasium while sprinkler heads are installed in division of standard response type, special response type, and earlier response type. The fire scenario was designed under the assumption that the fire started from overheating of a heater in the indoor gymnasium has transferred on to a couch to spread. The analysis on the operation time of the standard response type sprinkler head, the special response type sprinkler head and the early response sprinkler head was conducted. The result showed that, in case of fire in a gymnasium, the time for opening of the heat sensor due to the heat from the fire varies by the type of the sprinkler head. When a special response type sprinkler is installed, it worked below the assessment standards. When an early response sprinkler head is installed, it worked appropriately according to assessment standards. Based on the results, we found that sprinkler heads will work properly when installed according to design relevant to laws and regulations. This means that there is a limit in installation of sprinkler heads based on the existing law-based design as for indoor gymnasiums. Again, we conclude that if sprinkler heads are installed based on design made through laws and regulations, more time will be needed for operation, making it highly likely to fail to stop a fire at an earlier point of time.

• Journal of Convergence for Information Technology
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• v.8 no.4
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• pp.115-120
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• 2018

This paper describes the design and trial development of a system that supports continuous hazard mapping by local residents in their daily life. We performed an interview survey to design our system in a model traditional town in Saga Prefecture, Japan. The results show that despite continued efforts, many practical problems remain and residents feel unsafe. Considering these results, we designed and developed a unique information and communication technology-based support system that contributes to community-based disaster prevention and reduction. The continuous resident participation and posting design are the core concept for our community-based approach. Our system continues to support making a hazard map by integrating the community-based hazard information. Local residents register information (disaster types, risk level, photographs, comments, positional information) about locations that could be dangerous in a disaster. In addition, our system enables information sharing through a Web server. We expect that this information sharing will allow local hazard information for each district to be used.

• Proceedings of the Korea Contents Association Conference
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• 2017.05a
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• pp.201-202
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• 2017

현재 재난문자서비스는 재난재해 상황의 발생이 예상되거나 발생된 지역에 관련 내용을 전달해주지만 재해 예측 및 재해 발생시 알림 기능 이상을 하지 못하고 있는 실정이다. 본 연구는 기존의 재난문자서비스 사용 경험이 있는 사용자의 의견을 통해 문제점을 파악하고, 개선하여 문자를 받는 사람의 위치를 중심으로 가까운 대피소를 즉시 검색할 수 있는 웹 애플리케이션(Web App)의 URL 주소를 첨부하여 신속히 대피를 유도할 수 있는 재난대피시스템을 제안하려 한다.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2017.11a
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• pp.309-310
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• 2017

본 연구는 대한민국의 나날이 증가하는 범죄에 대한 문제의식을 바탕으로 주요 강력범죄 중 여성을 대상으로 삼는 범죄의 심각성에 대하여 초점을 두고 있다. 특히 4대 강력범죄 중 살인, 강간의 경우 여성이 피해자가 되는 경우가 매우 높게 나타나고 있으며, 최근 데이트 폭력 및 몰카범죄 등이 심각한 사회문제가 되고 있는 실정이다. 이에 여성을 대상으로 하는 범죄의 경우 다양한 기술이 결합된 CPTED를 활용하여 사회적 안전 확보 및 효과적인 환경설계를 통한 범죄예방 방안에 대하여 연구하였다.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2022.10a
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• pp.128-129
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• 2022

본 연구는 통합관제센터 구축시 범죄예방환경설계(Crime Prevention Through Environmental Design, 이하CPTED)의 효과적인 기능과 운영 그리고 유관기관과의 협력을 위한 거버넌스의 측면과 향후 CCTV를 활용하는 방안을 마련하는 것이다.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2022.10a
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• pp.363-364
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• 2022

주민의 안전한 생활은 삶의 가장 기본적인 요건으로 범죄는 불안감이 가중되어 삶의 질을 저하시키는 주요 요인이라 할 수 있어 범죄예방을 위한 다양한 정책 중 환경설계를 통한 범죄예방(CPTED)의 필요성이 대두되고 있는 실정이다. 따라서, 지역사회 커뮤니티 형성, 범죄예방 정책 수행 및 각종 인프라 구축 등을 위한 범죄예방 도시디자인 가인드라인 수립이 필요한 것으로 판단된다.