• 한국산학기술학회논문지
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• 제18권1호
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• pp.310-315
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• 2017

대규모 건설공사 현장에서는 발파공사에 대한 표준발파패턴과 시험발파패턴의 발파진동추정식의 상이에 따른 설계변경의 반영 문제로 시공사, 건설사업관리자, 발주처간의 갈등요인을 해소하기 위한 체계적인 자료의 수집 및 분석 과정을 통하여 효율적인 대책수립이 필요한 실정이다. 발파진동에 의한 인접 구조물에 미치는 영향을 여러 각도로 평가하려는 연구들은 계속 되어 왔으나, 노천발파를 수행하면서 현장계측의 진동파형을 분석하여 인접 건축물의 안전성을 확보하고 현장여건에 적합한 발파공법을 연구한 사례는 미미한 실정이다. 따라서 현장여건에 적합하고 경제적이며 효율적인 발파작업을 수행할 수 있도록 시험발파를 통하여 발파패턴 선정의 개선방안을 제시하는 것이 필요하다. 본 연구에서는 실제 도로확장공사 현장에서 시험발파를 통한 표준발파공법 및 진동규제기준별로 적용되는 이격 거리를 기준으로 노천 발파작업을 수행하여 발파진동 값을 계측하고 이를 통한 발파공법별 진동예측식을 회귀분석 전산프로그램을 이용하여 신뢰수준 95%의 K, n, R등을 산출하였다. 시험발파 대상지역의 발파허용진동기준을 0.3cm/sec로 설정하고 노천발파지침의 발파진동추정식과 시험발파의 발파진동추정식에 따른 이격 거리별 장약량과 발파공법을 비교분석한 결과 사업비가 증가하는 요인을 도출할 수 있었다. 또한, 노천발파 작업 중 인접 구조물에 대한 계측 및 분석을 수행하고 노천발파지점과 가장 인접한 구조물을 선정하여 발파진동 계측 및 평가를 시행하여 노천발파공사를 완료하는 과정에서 나타난 노천발파 설계 시공 지침에서의 시험발파 절차 및 해석방법에 대한 문제점을 분석하여 개선방안을 제시하였다.

• 환경위생공학
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• 제19권2호
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• pp.30-36
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• 2004

Dry decontamination technique is required for maintaining nuclear material handling equipment contaminated with highly radioactive material in a hot cell. In order to determine the optimum blasting conditions of dry ice pellet blasting device, the basic experiments have been conducted on the simulated test specimens of four types of metals. The removal efficiency of test piece was evaluated by the XRF analysis and the change of the surface condition before and after blasting. The removal efficiency of cesium on loose contamination was 100% under blasting pressure; 3 kg/$cm^2$, blasting distance; 10 cm, blasting time: 10 sec. In case of fixed contamination, the removal efficiency of cesium was almost 96% under blasting pressure; 4kg/$cm^2$, blasting distance; 10 cm, blasting time; 30 sec.

• 한국농공학회논문집
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• 제60권4호
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• pp.55-62
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• 2018

Problems on vibration due to blasting for infrastructure development are getting important because of a civil appeal. Blasting-induced vibration is representative construction pollution, hence, it is possible that a number of environmental damages occur. In this study, borehole test blasting was conducted at Sintanjin area, Daejeon and square root equation with 95% confidence level was proposed for prediction of blasting-induced vibration. The vibration value predicted from this equation was more conservatively evaluated than the values predicted from U.S. Department of Interior, Bureau of Mines (USBM) and Nippon Oil & Fats Co., Ltd. (NOF) equations. Therefore, the proposed equation in this study seems to contribute for safety blast design. However, for optimal blast design, inducing equation for prediction of blasting-induced vibration through the identical test blasting with field construction such as rock slope blasting would be required.

• 화약ㆍ발파
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• 제21권4호
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• pp.1-10
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• 2003

연암평가는 굴착난이도 평가와 관계가 많은 것을 고려할 때 굴착과 관련되는 발파와 연관 지울 수 있다. 따라서 현장에서 소량의 화약을 사용하여 누두공시험에 의해 구해진 누두지수와 발파계수를 연암의 분류요소로 사용하기 위한 시도가 이루어 졌다. 또한 현지 지반의 탄성파속도와 암석의 파쇄에 대한 저항성 나타내는 Protodyakonov의 계수도 분류요소로 사용하여 연암의 분류를 실시하였다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2004년도 춘계학술발표회
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• pp.930-937
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• 2004

In tunnel blasting, rock damage and overbreak at excavation limits are strongly related to stability of the tunnel and cost for rock support, and also affect to maintenance after tunnel construction. In this study, many field tests and measurements have been carried out in highway tunnels so that discordance between blast design and practical production blasting could be settled and actual methods of over break control could be proposed through the understanding of the problems in existing blasting patterns. Test blasting in tunnel was carried out many times in two tunnel sites. Also, long hole blasting longer than existing blasting pattern was executed for good grade of rock mass whose RMR value is more than 60. Using the results of test blasting, new standard blasting patterns for two lane tunnel were proposed. As a result of profile measurement after blasting, drilling is a major factor of overbreak. And then the methods for minimizing overbreak were adapted in new blasting patterns.

• 화약ㆍ발파
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• 제10권4호
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• pp.6-18
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• 1992

This Test Blasting aims to dig pier foundation in the water, therefore the Caps & Powder needs 5-20% more Than the amount of ground blasting works. It results in the Dimension of water blasting standardization This project is Contracted with th office of HAM River Development of Kyunggi province.

• 화약ㆍ발파
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• 제13권4호
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• pp.39-46
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• 1995

This report was arrangemented and analysed by blasting previous instance of Nocsan, developing area of national factory town in Pusan since 1994. 11. our team have acquired sequential blasting machine which is used at open blasting sites of other countries. The result of study is that follow ; in case of delay electric detonator of Korea, it is possible to use 300 ~600 blasting holes in 2 charge per delay. But in our experience, it is best condition to use 100~200blasting holes at 1 charge per 1 delay.

• 화약ㆍ발파
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• 제42권1호
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• pp.23-33
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• 2024

최근 발파에 대한 다양한 신기술과 특허공법들이 개발되고 있다. 본 연구에서는 MDS 발파공법의 현장 적용성을 확인코자 시험시공을 진행하였으며, 파쇄입도와 300mm 이상의 대괴 발생률을 측정 및 분석하여 기존의 표준 발파공법과 비교하였다. 시험시공은 각 회차별로 동일한 벤치에서 표준발파와 MDS발파를 각 3회씩 시공하였으며, 디지털 영상처리기법을 활용하여 파쇄입도(P80)와 대괴 발생률(S30)을 측정하였다. 또한, 현장에서 체 바가지를 제작하여 파쇄석 더미에서 대괴를 선별하고 계근 및 환산처리를 통해 실측값을 산출하였다. 분석 결과 파쇄입도는 MDS발파가 표준발파보다 평균 약 21.0% 감소하였으며, 대괴 발생률에서 100-S30은 평균 10.1%, 실측값은 평균 7.6% 감소하였다. 시공 현장의 암질 차이로 인해 각 회차별로 발파효과는 차이가 있었지만, 전체적인 경향으로 볼 때 동등한 조건에서 MDS발파가 표준발파에 비해 파쇄입도 및 대괴 발생률에서 보다 효과적인 결과를 나타낸 것으로 판단된다.

• 한국환경과학회지
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• 제13권1호
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• pp.99-107
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• 2004

This research is to determine the level of environmental pollution at a blasting construction area which is the origin of noise, vibration, and suspended particle, and to compare the results with other domestic and international standard data. This experiment is also to find out the effects resulting from blasting construction and to propose a plan that can decrease environmental pollution. The blasting construction area is a factory site which is about one and half million square meter and sewage disposal plant is about ninety thousand square meter. Both were selected as the areas for the tests to be conducted in determination test. The test to determine the level of noise, vibration, and total suspended particle was conducted thirty times around the blasting construction area by comparing measurement results and numerical analysis. However, as the test was not conducted in the laboratory but in the actual blasting construction area, it was not possible to do the test with the same exact conditions each true. Therefore, the test was not ideal as conditions could change from test to test. For the most part, the level of noise was below the standard level of 70dB. Every vibration test was under the standard limitation. For example, a house, 200m away was tested for noise and vibration and the level was found to be under the 0.2 cm/sec which is the standard for specialty designed cultural sites., i.e very low level. Also a buried oil pipeline that was 30m away also marked under 2.0cm/sec which is the norm for an industrial area. However, if there were an oil pipeline under the house, the amount of charging gunpowder per hole should be decreased compared to the amount used in the test. The test result for suspended particles under the standard limitation which is 24hour average 300$\mu\textrm{g}$/㎥ at a distance from blasting wavelength, but at detonator, total suspended particle from the blast origin exceeded the standard limitation. If explosion occurs when it detonates in the hole, most of the energy would be absorbed in the crushing of rocks, but some remaining energy would make noises and vibration inevitable. So the important thing is how to minimize the environmental pollution from the blasting. There should be regulations in order that the standard limitation is not exceeded, and to decrease the environmental pollution from the blasting.

• 화약ㆍ발파
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• 제16권1호
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• pp.13-19
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• 1998