• Explosives and Blasting
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• v.19 no.4
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• pp.23-30
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• 2001

근래 건설·토목현장에서는 원가절감 및 안전사고 감소 방안으로 보다 안전하고 저렴한 폭약사용에 더욱 많은 관심을 가지고 있으며, 주로 석회석 광산에서만 사용해 왔던 안포 폭약을 토목현장에서도 수년 전부터 적용하기 위해 노력해 왔다. 또한 최근에는 에멀션 폭약의 개발 및 수요처에 적극공급으로 인해 상당부분 기존 다이너마이트 시장을 대체하였다. 그리고 외국에서 일부 적용 중인 현재의 안포 폭약 공급시스템과 에멀션폭약의 특징을 조합한 벌크 에멀션 폭약의 공급을 눈앞에 두고 있다. 이러한 추세에 발 맞추어 전문기술자들의 관심을 더욱 높이고, 현재까지 토목현장에서 시행되어온 에멀션폭약의 사용상 장점과 단점을 수집·검토·연구하였으며, 이에 따른 문제점 개선방안을 제시하였다.

• Explosives and Blasting
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• v.24 no.1
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• pp.29-37
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• 2006

The demand of the bulk emulsion explosives is being increased more and more by using the mechanization loading system in a domestic tunnel sites. Thus, a rational design criteria that is suitable for rock and circumstance condition has been required. In this study, authors investigated a optimum specific charging weight and resonable charging weight based on domestic blasting construction cases, which were performed by using a mechanization bulk emulsion explosives loading system up to now. Authors also analyzed the blasting results and got the following formula $({\Upsilon}= 0.669 + (0.0154{\times}RMR),\;r=0.81)$ from the relationship between a optimum specific charging weight of bulk exp. and rock mass rating. A range of resonable charging weight with a drilling depth is calculated considering a rock conditions.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2001.11a
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• pp.274-280
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• 2001

우리나라에서 전통적으로 건설$\cdot$토목 현장에서 암절취 목적으로 주로 사용되고 있는 젤라틴다이나마이트 폭약의 경우 폭속이 비교적 높고 강력한 폭발위력으로 인해 암반의 강도가 높은 현장에 주로 사용해 왔다. 그러나 최근에는 폭약의 안전도 감소와 원가절감을 위해서 현재 사용중인 폭약 중 가격이 가장 저렴한 안포폭약을 개선하고 에멀젼폭약의 특징을 살린 벌크 에멀젼폭약의 공급을 눈앞에 두고 있다.(중략)

• Explosives and Blasting
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• v.22 no.1
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• pp.1-4
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• 2004

The gelatine dynamite, which has been traditionally used in Korea as the 2nd generation explosive, is now being rapidly replaced by an emulsion explosive because of the change in life environment economic schemes, and safety reasons. However, there has been lack of study in the surfactant which is an important factor in manufacturing technology of emulsion explosives, and especially GMB technology has not been used in Korea. In this study, effective usage of surfactant with optimum dosage and optimum mixing temperature of GMB was investigated to increase safety and effectiveness.

• Explosives and Blasting
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• v.22 no.3
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• pp.65-70
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• 2004

Lately, the length of tunnel, the number of long-large tunnel over 3 lanes are steeply increased because of the request for high-speed and straight road. Therefore, the maximization of excavation efficiency is needed in tunnel construction. The sapaesan tunnel (4 lanes with the length of 4km) construction was delayed with environmental conflict far 2 years. For making-up delayed construction period, various new methods were adopted to improve excavation length, look-out and blasting efficiency. This study introduced bulk explosive which is new method in tunnel blasting and verified the efficiency of bulk explosive far long-large tunnel.

• Explosives and Blasting
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• v.18 no.3
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• pp.29-40
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• 2000

Emulan은 ANFO와 bulk Emulsion(Emulite)의 흔합물로서 ANFO입자 사이의 공간은 내수성을 가진 Emulite로 채워지기 때문에 에너지와 밀도가 확실하게 증가하며 뛰어난 내수성을 가진다. 따라서 높은 장전밀도와 고 함유 에너지로 인하여 ANFO 대비 천공 미터당 암석 파쇄량을 40 %이상 증가시킬 수 있으며 저항선과 공간격을 각각 20%이상 증가시킬 수 있다. 특히, 습윤상태가 심한 장소에서 ANFO를 대신하여 가장 경제적인 폭약임이 확인되었다. 본 연구에서는 최신 Bulk-type의 폭약(Emulan)과 AFPO 및 Emulsion계 폭약을 각각 사용하여 현장의 적용성, 상호 발파효과 및 효율성과 경제성 비교를 통하여 앞으로의 대규모 노천현장이나 석산에서 보다 적절하게 사용할 수 있는 화약류에 대하여 알아보고자 하였다.

• Proceedings of the KSEE Conference
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• 2008.10a
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• pp.3-16
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• 2008

• Explosives and Blasting
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• v.26 no.2
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• pp.64-76
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• 2008

Bulk Emulsion blasts using mechanized charging system, which is generally used in foreign countries, have recently introduced and gradually increased in Korea. The Bulk Emulsion are safe and able to increase the charging density for improvement of fragmentation and advancement especially in tunneling, and minimizing environmental problem. Because of less toxic gas generation, the explosives are called, namely ech-friendly products. There are two kinds of Bulk Emulsion; one is for open cut and the other is for tunneling. According to features of blast sites and its purpose, the compositions are different, but the principle is the same. In this study, trial blasts using Bulk Emulsion for tunneling had executed at 10 sites in Korea. The major result of the major job-sites is the following. First of all, compared with cartridge explosive, Bulk Emulsion was able to increase its charging density up to $35{\sim}60%$, to decrease the blast holes to approximately $10{\sim}30%$ down, and the advancement was improved up to $8{\sim}20%$ and also 30% up in its fragmentation. Toxic gas production after cartridge blasting showed 34.44ppm of its CO. Bulk Emulsion, however, showed 20.13ppm, which was 58.45% production of the cartridge explosive, and NOx was below 2ppm. The mechanized charging system of Bulk Emulsion should be applied to large sized tunnel blasting, long advanced tunnel which can secure the advancement of over $4{\sim}5m$, and the sites required finishing rapidly.

• Proceedings of the KSEE Conference
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• 2004.08a
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• pp.77-95
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• 2004

• Proceedings of the KSEE Conference
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• 2006.03a
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• pp.39-50
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• 2006