• Explosives and Blasting
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• v.22 no.3
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• pp.85-95
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• 2004

A damage criterion by blast vibration & noise has to be established through a engineering view point. Though a blast vibration has effects on human and structure, they have experienced a different damage. Thus, a damage criterion for structure needs to get a peculiar criterion which are different from one for human. At present, blast damage criterions authorized by government are Vibration & Noise Act made by Ministry of Environment and blast damage criterion of specifications for tunnel made by Ministry of Construction & Transportation. Vibration & Noise Act is based on the response of human, and while it has some application problems, it turns out to be partly rational. But, blast damage criterion of specifications for tunnel has unreasonable guidelines. In this article, its problems are reviewed and a alternative blast damage criterion is suggested.

• Explosives and Blasting
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• v.31 no.2
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• pp.50-58
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• 2013

Since various types of safety facilities have been located around blasting construction site, each of the institutions with regard to blast works has prepared limit criterion of blast vibration, respectively. But these criterions applied for limiting vibration are causing harmful effect including construction cost increasement and construction time extension due to exceedable high level application. In this study, more reasonable limit of blast vibration was suggested after reviewing criterions based on existing design and construction cases and analyzing of problems of applied criterions.

• Explosives and Blasting
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• v.23 no.3
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• pp.1-10
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• 2005

Blast-induced ground vibration nay cause an environmental impact such as neighbour's complaints or damage on adjacent structures and facilities. Complaints associated with blasting have often become a target of public grievances. One of the difficulties to solve the problem is that we do not have a national standard for the acceptance level of blast-induced ground vibration. A peak particle velocity criterion, which was suggested for urbane underground construction, has often been widely used. Efforts have been made to establish more rational criteria. It seems that differing cultures have often differing thresholds of the toleration of vibration, and that technical data or rational grounds for establishing the limits are hardly provided. In this paper, national standards for allowable limit of blast vibration were presented and discussed.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.43 no.4
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• pp.459-468
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• 2023

Power plant is a kind of basic industrial facility and might cause fatal industrial and human damage. In this study, the characteristics and effect of blast-induced vibration for tunnelling which underpass ○○ power plant in operation were evaluated. Previous blasting cases adjacent to industrial facilities were intensively reviewed, then allowable vibration criteria were suggested. 3 dimensional dynamic numerical analysis based on finite element method was performed to investigate particle velocity and resonance was examined by calculating the predominant frequencies. As a result, particle velocity at pump foundation which is nearest to the source was approached to the allowable criteria, therefore, the modified blasting pattern was newly suggested and confirmed the attenuation effect based on the test blasting. Consequently, appropriated decision-support procedure was established in case of adjacent blasting to industrial facilities.

• Tunnel and Underground Space
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• v.16 no.2 s.61
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• pp.179-188
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• 2006

The vibration or/and noise generated by blast operations might cause not only structural damage to properties but mentally also to humans and animals. For that reason, maximum permitted vibration and noise levels are set by sensitivities of structures and they are used for the management of blast vibration. It is known that the fish lived in water are more sensitive to vibration than land animals, and thus the adverse impact of the blasting on fish farms should be very concerned. This study investigated the vibration and noise levels at a large eel farm located some 840 meters of the blasting site through the large real-scale experiments of blastings, prior to conducting the actual blasting. As a result, it was found that the noise met the requirement to be within maximum permitted level, while the ground vibration exceeded the permitted vibration. Accordingly, the impact of the excess vibration was investigated by an existing empirical method and verified by a new three dimensional numerical analysis. In this study, such an inspection process was briefly described, and a method was suggested for the examination of possible adverse effects from blasting on vibration-sensitive structures like the eel farm. The study also introduced a design method that controls the blast effects - ground vibration and noise.

• Explosives and Blasting
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• v.26 no.2
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• pp.1-10
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• 2008

The safe level for residential structures has usually been prescribed as just 'particle velocity' in various specifications in Korea. It implies that there is a possibility of interpreting the 'particle velocity' as the PPV (Peak Particle Velocity), PVS (Peak Vector Sum), or something else, depending on the interpreter. As a result, there have always been some difficulties in both designing a controlled blasting and controling the blast-induced ground vibrations. This paper is intended to show what the role of the safe level criteria such as PPV or PVS is, and also how we should use the concept of the scaled distance equation in a controlled blast design. The paper also emphasizes the importance of the allowable level for various residential structures and its uses in each stage of the controlled blast design.

• Explosives and Blasting
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• v.30 no.1
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• pp.37-51
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• 2012

In this case of "Seongnam~Yeoju double-lanes railroad construction", there were safety facilities which were concerned about damages from vibration and noise. In the project design stage, the rock-splitter method was designed to prevent them. The electronic blasting was considered to improve construction speed and economic value as an alternative tunnelling method, complying with the site's vibration criteria(cowhouse : 0.09cm/sec, residence : 0.2cm/sec). In the environment evaluation report of the eDev, tunnel electronic blasting systems, the blasting pollutions can be managed by the electronic blasting method. The results were successfully conducted with high speed construction without any damages to adjacent facilities.