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崔榮天 尙志大學校 1984 論文集 Vol.5 No.-
Nowadays, we use the terms, the conservation of nature, the preservation the nature and the protection of environment with the same meaning, but in the strict sense, they are different. I think, however, it is not a serious problem if we have common purpose to make our living conditions better. In the past, we didn't include the teaching plans about them in the educational plans in schools. Therefore, I suggest that the teaching plans about the conservation of nature have to be inserted in the curriculums in schools, and in organizing the curriculums, the experts from schools and ministry of education are also to be participated.
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崔榮天 상지대학교 1994 論文集 Vol.15 No.-
The purpose of this study is to analyze the parameters governing the effect of controlled blasing technique and to suggest optimum conditions of blasting. For test blasting, Korean plastic pipe charge (Finex 1) and detonation cord are utilized in currently-developing two granite quarries located in Jecheon-Gun, Chungbuk, Korea. To identify factors affecting the blasting effects, geological, physical and mechanical characteristic of rockmass, drilling pattern and blasting condition is analized to various quarrying techniques. Powder factor for 4-way blasting and decoupling ratio are recommended to be approximately 80 g/㎥ and 2.0, respectively, and density of charge for vertical and horizontal holes to be 60 : 40. Optimum spacing of hole is found to be 20 ㎝, and corner angle to be above 90˚. Application of controlled blasting technique for quarrying granite in Korea can contribute to maximum productivity.
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할암기를 이용한 무진동 암반 파쇄공법의 현장 적응 사례
최영천 대한화약발파공학회 2004 화약발파 Vol.22 No.3
국내 재개발 및 건설공사현장에서 암반파쇄 및 굴착 절취 작업의 일환으로 화약을 사용하는 발파공법과 유압 장비를 이용한 무진동 절취 공법, 브레이커를 이용한 파쇄 공법이 대표적으로 사용되고 있다. 유압력을 이용한 무진동 절취공법은 진동, 소음, 비석 등의 공해를 제어하고, 현장에 인접한 보안물건을 보호하며, 기상조건에 제한을 받지 않아 민원을 예방함과 동시에 암 절취 공사의 효율성을 높일 수 있어 암반 파쇄에 따른 여러 분야에서 적용되고 있다. 그러나, 현행 무진동 절취공법은 암반의 특성을 정확하게 파악하지 않고 대부분을 경험에 의존하여 시공패턴을 설정하고, 시공이 행하여지고 있다. 이러한, 각각의 암반 파쇄 공법은 그 적용에 따른 경제적 이익과 시공성, 안전성등을 극대화 할 수 있으나, 반대로 적절하지 못한 공법 적용은 커다란 경제적 손실과 시공성 및 안전성의 저하를 가져오므로 현장 주변 여건과 암반 상황 등 현장 여건을 종합 검토하여 공법 선정이 이루어져야 한다. Explosive blasting, hydaulic power unit and rock splitter are typically utilized for rockmass breakage and cutting in reconstruction of building structures and other construction site. Hydraulic rock cutting method, that can be utilized any weather conditions, has been applied mainly by experience for controling damages caused by vibration, noise and rock cuttings, and reducing damage claim by protecting adjacent structures. However, it is required to understand the characteristics of rockmass to improve operation efficiency. Although every cutting method has its own advantage, but it should be applied by considering site circumstance and rockmass properties in details to maximize the operation efficiency and economic feasibility.
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都心地 住居地域에서 發破作業時 地盤振動과 安全作業限界에 關한 硏究
安大榮,崔榮天 尙志大學校 1991 論文集 Vol.12 No.-
The blasting vibration and other properties were measured at the two sites along the subway line in seoul to study their effect on the Apart and to establish the safe blasting limit. From the analysis of the measured data, the empirical equation and the safe blasting limit are obtained as follows. 1) V-K(R/√W)-ⁿ, where the Values for K and n are estimated to be 45 to 56 and 1.55 to 1.58 respectively. 2) the equation showed that the safe blasting limit which had no danage on the residential structures is R〉19.8√W. 3) Air blast is found to be proportional to the sguare root of charge per delay and to the Scaled distance to the minus 1.2∼1.5
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전남(全南) 보성강(寶城江) 유역(流域)에 분포(分布)하는 중사광상(重砂鑛床)의 지질(地質) 및 선광(選鑛)에 관(關)한 연구(硏究)
최영천,Choi, Young Cheon 대한자원환경지질학회 1982 자원환경지질 Vol.15 No.3
The surveyed Boseong river, flows from south to north crossing Boseong gun Mirukg myon, Nodong myon, Yuleo myon, Bocgnae myon, Mundeog myon, and Seungju gun Nam myon, Jeonranam do. The geology of the surveyed area consists of age-unknown composite gneiss and schist, crystaline chlorite gneiss, porphyroblastic gneiss and granite gneiss, and metasediments of Myon Bong formation and Seologri formation. These metamorphic rocks are intruded by cretaceous biotite granite, granodiorite, and quartz diorite. The heavy sands occur in Quarternary alluvium and colluvium. The composition of the river bed is sand 60%, gravel 30%, and clay 10%. The gravel content of the river bed decreases as the increases. The average depth of auger boring is 0.87 m. The average heavy mineral composition of the heavy sand is monazite 6.83%, zircon 4.88%, ilmenite 11.36%, magnetite 8.36% and garnet 4.84%. The best heavy minerals separation procedure would be primary treatment of the sand by humphrey spiral and table, and retreatment of the table concentrate by magnetic separator. The minimum economically feasible capacity of gravity and magnetic separation plant would be 500 ton/hr when only the heavy minerals are recovered but it may be reduced to 100 ton/hr. capacity, if gravels and sands are added to the valuable products.
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