• Explosives and Blasting
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• v.19 no.3
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• pp.75-89
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• 2001

아파트 재건축을 위해 발파해체공법을 이용하여 실시한 5층 아파트 9개동의 시공사례를 중심으로 국내 아파트 발파해체에 따른 경제적 공법의 제시와 시공되어진 해체구조물의 현황과 공법, 사전처리 공법등을 소개하고 또한, 지상구조물이 아닌 지하구조물의 해체를 위한 콘크리트의 부분 발파사례를 통하여 해체 분야의 발전 방안을 고찰하였다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.33 no.10C
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• pp.844-850
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• 2008

This paper stated the proposed algorithm to certify the characteristics of artificial explosion sounds traveled through underground bedrock medium. Artificial explosion that travel through underground bedrock had an attenuation within high frequency bands in increase of a distance with multiple transmission paths phenomenon and inhomogeneity of geological status. In this paper, explosion experiment was made in underground tunnel to verify efficiency of proposed algorithm. The could certify the characteristics of artificial explosion sounds as extracted and numerically quantified the characterized parameter with collected sound sample that traveled through underground bedrock channel.

• Explosives and Blasting
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• v.33 no.2
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• pp.15-24
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• 2015

In general, blast vibrations could make underground cavern unstable by causing relative movements between the surrounding rock blocks that are divided by discontinuities such as joints and faults around the cavern. In the study, a blast guideline was established to obtain the stability of a large-scale cavern for underground crusher room in an open pit limestone mine in Korea. The guideline was suggested in the form of a standard calculation method of the maximum charge per delay for a safe blast. The allowable level of peak particle velocity for the cavern was determined based on the result of a numerical analysis using FLAC2D. The ground vibration data required for the study was obtained from field measurements.

• Explosives and Blasting
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• v.23 no.4
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• pp.1-18
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• 2005

The underground research tunnel, which is under construction in KAERI for the validation of HLW disposal system, is excavated in a granite rock by drill&blasting. In order not to disturb the operation at the research facilities including Hanara reactor by the blasting for the excavation of $6m{\times}6m$ tunnel, a test blasting at the site was performed. Using the vibration equation derived from the test blasting, it was possible to predict the vibration at different locations at KAERI and to conclude that the blasting design would meet the design criteria at the major facilities in KAERI. The noise and vibration generated by the main blasting were continuously measured. In the case of vibration, the measured values were lower than the predicted one from the vibration equation. It is, therefore, concluded that the influence of blasting work for the construction of 280m long research tunnel on the major facilities in KAERIl would be insignificant.

• Magazine of korean Tunnelling and Underground Space Association
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• v.7 no.3
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• pp.53-78
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• 2005

• Explosives and Blasting
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• v.14 no.3
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• pp.40-47
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• 1996

• Magazine of korean Tunnelling and Underground Space Association
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• v.5 no.2
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• pp.29-51
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• 2003

• Journal of Korean Tunnelling and Underground Space Association
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• v.24 no.6
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• pp.483-494
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• 2022

Owing to the saturation of ground spaces in downtown areas, underground spaces are being developed increasingly. Underground spaces are utilized for transportation, water supply and sewerage, communication zones, electric power zones, and various cultural complexes. In Korea, for excavating underground spaces, blasting methods using gunpowder such as the New Austrian Tunneling Method (NATM) are mainly used. However, the blasting method causes vibration and noise during tunnel excavation, generating many complaints from residents in the vicinity of the excavation site. To address this problem, various methods have been developed, and recently, vibration and noise have been reduced using deep excavation. This study predicts blast vibration changes according to the depth, under the same blasting and tunnel conditions, using numerical analysis based on the blast vibration measurement data of the GTX-A route, the tunnel cross-section drawings, and ground investigation reports. Furthermore, the necessary separation distance from densely populated areas such as residential areas is suggested by analyzing the trend of decreasing blast vibration according to the distance from ground surface directly above the blasting location.

• Magazine of korean Tunnelling and Underground Space Association
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• v.23 no.4
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• pp.38-48
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• 2021

최근 국내 건설현장들은 도심지 근접구간에서 발파진동피해를 최소화하기 위하여 전자뇌관을 이용한 미진동 전자발파공법 적용사례가 증가하고 있는 추세이다. 그러나 미진동 전자발파는 무진동 암파쇄 대체공법으로 경제성은 우수하나 시공현장에서 진동을 제어하는 공법으로 1회 굴진장을 1m 이하로 적용하고 있어 시공속도가 저하되는 문제점이 발생하고 있다. 따라서, 미진동 전자발파 수준의 진동제어와 굴착비 절감 및 시공속도를 높일 수 있는 더블데크 발파공법을 연구 및 시험을 수행하였다. 미진동 전자발파와 더블데크 전자발파 비교 시험결과 진동레벨, 발파효율, 파쇄입도, 여굴량 등이 비슷한 수준으로 평가되어 현장 적용시 굴진장 증대로 인한 공사기간 단축 및 시공비 절감이 가능할 것으로 판단되었다.

• Tunnel and Underground Space
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• v.11 no.4
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• pp.344-351
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• 2001

In the tunnelling by blasting, the calculations of charge weight and the estimations of blasting effect have been simply carried out by empirical formulas. Also, it has been rare to consider the impact energy of blasting in numerical analyses. Thus in this study a numerical modeling technique of blasting load is developed and used with the 2 dimensional distinct element method(DEM) to consider the nonlinear behaviour of discontinuous underground structures. TD examine and verify its applicability of the numerical model to actual problems, a blasting of tunnel under an embankment is numerically analysed with DEM. It is examined that the behavior of circumference structures, the displacements of above- and under-ground structures, and the propagation of particle velocities can be known by this numerical analysis. As a result, the blasting load model, proposed by this study, can be applied to actual problems. This model applied with DEM can be used in the examination of structural stability.