터널 및 地下採掘 現場에서의 V-CUT심빼기를 應用한 長孔發破에 對한 硏究

金益壽,鄭義鳳,金琮鈗,金鎭錫 三陟大學校 産業科學技術硏究所 2002 産業科學技術硏究論文集 Vol.7 No.1

This research is on developing a new blasting technique which will complement the problems of the ordinary burn-cut blasting technique. This new technique employ a v-cut long hole blasting technique. the on-site testing of this v-cut technique has shown a number of advantages to the ordinary burn-cut blasting technique. When tested on the whole-section digging on the large section of a standard mining hole. the v-cut technique has shown the equivalent result to the ordinary burn-cut technique. However, the v-cut technique is more effective than the burn-cut technique, since it makes drilling simpler, and reduces both cost and amount of construction time.

Mn-nodule의 선광에 관한 연구(제1보)

김익수,박동기,성일용,김승혁,엄제현 三陟大學校 2000 論文集 Vol.33 No.1

For the purpose of reserching the floatability of Managanese-nodule, the test was proformed by means of Zeta potential measuring and the flotation experiment for 10Å Manganite. The flotation condition in the flotation experiment were as follow. sample : Todorokite (0.3gr) sample size : 65 mesh ~ 200 mesh condition size : 10 min flotation time : 4 min air amount : 20 ㎖/min promoter : D.A.cl, S.D.S. PH regular : Hcl, CaO From the test the flotation result were summerized as follow. 1. The isoelectric point of 10Å Manganite in the Zeta potential measuring was pH 4.3. 2. The floatability of 10Å Manganite was 80% as a function of pH5 using 10mg/ℓ of D.A.cl. 3. The recovery of 10Å Manganite was best when the floatability of 10Å Manganite was 90% as using D.A.cl 80mg/ℓat PH 2.7.

SGCI 材料의 Casting 및 磨滅强度에 關한 硏究

김성주,문형태,최익수,노무근 三陟大學校 産業科學技術硏究所 2003 産業科學技術硏究論文集 Vol.8 No.2

In order to collect the basic data for the production of nodular cast iron requiring wear resistance. the mechanical nature such as structure analysis, hardness, and tensile strength were performed on cast sample by changing residual Mg concentration of cast iron at the range of 0∼0.052% and also the wear characteristics were examined through wear test by changing abrasion speed and final load. As a result, the following conclusions were drawn. The wear amount rapidly accelerates to the maximum abrasion sped of 2.3m/sec in a sample without Fe-Si-Mg alloy processing(residual Mg amount; 0%) by increasing the abrasion speed from 1.3m/sec to 2.3m/sec. As the Mg residual Mg contents increases, the ratio of nodular increases while hardness of a sample accelerates and the wear amount decreases. The maximum point moved to the high speed side in a sample with 0.043% residual Mg contents and the wear amount showed the maximum in 3.5m/sec of abrasion speed while a sample with 0.052% residual Mg contents showed the mechanical destruction wear to 4.3m/sec abrasion speed. The more residual Mg contents are in 0.6-l.1m/sec low speed range of abrasion speed, the more wear amount was resulted while the less residual Mg contents were. the less wear amount showed. Oxidation wear occurs at 4.5m/sec of traveling velocity. Since the wear of matrix structure occurs after wear of oxidized substance in friction caused by oxidized substance, the wear amount shows less than 2.3mg/sec traveling velocity. Therefore, as the residual Mg contents increase, the wear amount decreases. Although the wear amount is large since the traveling distance of destruction wear lasts very long. the residual Mg contents are small and the oxidation wear area becomes long in a sample with low hardness. Since the mechanical destruction wear occurs when the traveling &stances reaches to the end, the wear amount results in very small. The scratches appeared due to abrasive wear in mechanical destruction wear with 2.3/sec abrasion speed while it did not show in oxidation wear although the severe wear occurred. The sectional melting appeared in 5.4m/sec of high speed friction since the temperature of contact point increased more than 1000℃. Scratches are less in the area with low load and if load increase, shoving occurs in wear grooves. In the maximum load, the severe cracking phenomenon can be observed.

Fe-17%Cr 페라이트계 나노사이즈-산화물 분산강화합금의 인장성질과 고온산화에 미치는 산화물종의 영향

김익수,강창룡,이종문,이병우,정상훈,이원희 대한금속재료학회 2003 대한금속·재료학회지 Vol.41 No.12

In order to develop mechanically alloyed nano-sized ferritic ODS alloys, we have investigated the effect of three kinds of oxide such as Y₂O₃, Al₂O₃ and TiO₂, on the high temperature tensile properties, high temperature oxidation behavior and corrosion resistance. Due to the most distribution of fine and spherical particles, ODS alloys containing Y₂O₃ raise yield strength and tensile strength at high temperatures considerably. The results of high temperature oxidation tests indicate that the ODS alloys containing Y₂O₃, Al₂O₃ and TiO₂ are resistant to oxidation between 823K and 1023K. The ODS alloy containing Y2O3 by attributed by to thermal safety of Y₂O₃ showed an ecellent characteristics in oxidation and corrosion.

나노사이즈-산화물 분산강화 Fe-17% Cr 페라이트계 합금의 고온인장 성질에 미치는 미세조직의 영향

김익수,Watanabe, Y.,이용복,장진성,김창룡,Miyahara, K. 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.2

In the past few years, oxide dispersion strengthened(ODS) alloys produced by mechanical alloying(MA) techniques have become increasingly interesting for structure applications in nuclear fission and fusion power plant. The mechanical properties of ferritic 17% Cr ODS alloys with and without the addition of Ti and Mp and 17% Cr ODS were investigated and comparison with those MA-956 alloys in the temperature range of 973K to 1573K. Nano-sized oxide dispersoids in the 17Cr-3Mo-1Ti-0.25Y_(2)O_3) alloys suppressed the grain growth during annealing at high temperature and resulted in a remarkable improvement of the high temperature strength. The oxides containing Ti was the finest and showed the most uniform dispersion.

충북 보은군 보은읍-청원군 미원읍 일대의 옥천층군의 지질구조

김수정,김익균 慶北大學校 自然科學大學 地質學科 地質學硏究會 1989 伏賢地質 Vol.- No.11

광산보안계원 선임요건 완화방안에 대한연구

김익수 三陟大學校 産業科學技術硏究院 2005 産業科學技術硏究論文集 Vol.10 No.-

After a coal industry rationalization, An employee evasion rate of the mine industry have been increased continuously. Because of a mine employment evasion phenomenon, collecting manpower of new employees and primary grade technicians are very difficult situation. Such these circumstances, the mine security law is still same law when the coal industry was activated most. Supplying a primary grade technician of mine business was ended currently. Therefore, the mine industry made a self-aid plan, which is, the mine expert take an examination to obtains manager qualification. But, experience skilled workers are hard to pass the mine security manager examinations, because of low academic background and too old age. Considering these circumstances, we must revise the each items of the mine security law and it's trial rules to activate mine industry, we need to relief mine security manager appointment condition. Which means, we propose next subjects for the relief plans of a mine security manager appointment condition. 1. Considering characteristics of a mine field, to get a mine security qualifications, mine experts who has experiences over enough times can take a examination after educated by an appointed educational institutions. 2. Same as the mine security technician by an existing nation technique qualification law, give a qualification of the mine security manager to anyone who pass the mine security manager examination after educated by an appointed educated institutions and after they have a specified period of enough experiences at mine field. 3. Give mine security manager qualifications to student who took a mine security technique subject at the mine related department of four-year university and who has enough mine field experiences during specified period including field training program of the university.

정수처리 막분리 Pilot 시스템의 성능 평가

김지훈,김형수,염익태,한기봉 대한상하수도학회 2003 상하수도학회지 Vol.17 No.1

In this study, results of a microfiltration(MF) pilot plant are presented based on 6 months on-site experience. Performance evaluation of the hollow fiber membrane system was focused on two criterions: (i) permeated flux and operation time (ii) treated water quality. The pilot plant was operated in dead-end filtration mode under a constant flux. A module of hollow fiber membranes(polyethylene, nominal pore size: 0.1㎛) was used in this experiment. 15LMH(ℓ/㎡ · hr) operation kept much longer operation time compared with 30 LMH(ℓ/㎡ · hr) operation. After about four months of 15LMH operation, increase of suction pressure were less than 15cmHg and the membrane fouling was not serious. Overall, the results of this study demonstrated that 15LMH operation was a more effective and stable process than 30LMH operation for drinking water treatment.

江原道內 地下資源 및 에너지資源의 開發에 關한 硏究

金益壽 三陟大學校 1997 論文集 Vol.30 No.1

The amount of underground and energy resources in Korea is rapidly increasing with time. Especially there are an abundant amount of limestone and other mineral resources in Kangwon-Do, which is blessed with more than 50% of all the mineral resources in Korea. The production of these mineral resources in Kangwon-Do also more than 50% of the total production in Korea. Kangwon-Do has total of 111 active mines, and 2621 mine lots - 482 metal mines, 1914 non-metal mines, and 225 coal mine lots. Recently the coal industry has been having difficulties arising from the rationalization movement of coal industry, deep coal mines, small scale industry, and the narrow stream of coal deposit - all of which contribute to deteriorating production capacity of coal in Kangwon-Do. Therefore the production of coal, which has been the main underground resource produced in Kangwon-Do, is expected to diminish continuously hereof. Nonetheless, the abundance of other non-metal mineral deposits including limestone in Kangwon,-Do will indeed increase the productivity of such. As a countermeasure for the down-hill coal industry, a free investment condition, and the rationalization of coal industry must be established, as well as a extended program for the demand of coal. Furthermore, the general mine industry will have to strengthen the investigation of the natural resources, modernize and scale up the facilities, and actively promote the research and development of high-tech and lucrative new materials. The characteristic of the energy resources consumption of Korea is that an increase in national income and a change in the preference of the consumer greatly influence a rapid decrease in coal consumption and an increase in oil consumption as a replacement. Coal currently comprises the highest percentage of energy resources consumed in Kangwon-Do. Yet, it has been foretold that the consumption of oil, gas, and electricity will rise fast in the near future. The development of energy resources in Kangwon-Do, therefore, will strategically have to focus mainly on coal, oil, gas and electricity. As a long-term energy conservation plan, the construction of many more power plants, such as thermal, hydrodelectric, gas, wind, solar energy, and combined thermal-electric power plants is needed. Furthermore, a continuous research and study on supplementary energy sources - such as oil, urban gas, solar energy, urban refuse, forest products, industrial waste material and waste heat, and methane gas in rural and urban areas - is necessary. The development of energy resources in Kangwon-Do has been restricted for the purpose of the environmental protection program. However, Kangwon-Do has been overly restricted to develop itself to the point of lower living standards of the residents compared to those of other states of Korea. Any further and continued restriction on the development of Kangwon-Do is thus a threat to the human rights of Kangwon-Do residents. At this point the establishment of a rational development program for Kangwon-Do is mostly urgent.

기계적으로 합금화시킨 Fe-12~17% Cr 페라이트계 나노사이즈 산화물 분산강화합금의 강도특성

김익수,장진성,강창용 대한금속재료학회 2003 대한금속·재료학회지 Vol.41 No.6

Recently, oxide dispersion strengthened(ODS) ferritic alloys have been considered for the critical component materials of ultra-super critical pressure power plants or nuclear power plants. The strength properties of ferritic 12%Cr ODS alloys with the addition of Ti and W were investigated in comparison with those of 17% Cr ODS and 12%Cr ODS alloys in the range of room temperature to 1323K. Nano-sized oxide dispersoids in the alloys suppressed the grain growth during annealing at a 1323K and resulted in a remarkable improvement of the strength. The fine particles in 12%Cr ODS alloys with the addition of Ti and W was identified to be a complex oxide type of Y-Ti-O. The Complex oxides containing Ti was the finest and showed the most uniform dispersion.