• 제목/요약/키워드: Country Rock

검색결과 137건 처리시간 0.024초

대형직접전단시험을 활용한 국내 조립질 재료의 전단강도 특성 (Shear Strength of Coarse Grained Materials In the Domestic Crushed Stone Based on Large Scale Shear Test)

  • 이대수;김경열;홍성연
    • 한국지반공학회:학술대회논문집
    • /
    • 한국지반공학회 2005년도 춘계 학술발표회 논문집
    • /
    • pp.1252-1258
    • /
    • 2005
  • The coarse grained materials which is produced in the domestic stony mountains are used as principle materials in the construction sites such as dams, ports, pavement structures and etc. Despite using of various fields like this, There is few apparatuses to experiment these materials in the country. some design parameters of the structures until these days was used from the result of former research abroad. Hereupon, We have developed the large scale direct shear test apparatus and we conduct research in order to get a shear strength of the coarse grained materials from the domestic stony mountains in Kyuong-gi, Choong-chung and Kyoung-sang province. As results of the test, it was revealed that the internal friction was ranging from $38.6^{\circ}$ to $44.5^{\circ}$ and the cohesion was from $1.1kg/cm^2$ to $1.7kg/cm^2$ depending on the local rock conditions.

  • PDF

남한의 주용 금속광상산 석영내의 유체포유물의 가스성분과 용존성분의 화학조성 (Gas and Solute Compositions of Fluid Inclusions in Quartz from Some Base-metal ore Deposits, South Korea)

  • 김규한;정해란
    • 자원환경지질
    • /
    • 제32권5호
    • /
    • pp.421-434
    • /
    • 1999
  • Gas and chemical compositions of fluid inclusions in quartz some of Au-Ag, Pb-Zn-Cu and W-Mo mineral deposits in South Kores were analyzed to interpret the sources of ore fluid and the depositional condition of ore minerals in base-metal ore deposits. Fluid inclusions in quartz from the gold and silver mines are characterized by $CO_2$ rich fluids which have a wide range in $CH_4 \;and\; CO_2$ contents ($CH_4/CO_2$=0.001-0.225). The $CO_2$ rich but $CH_4$-poor nature of the fluid reflects the high fo2 condition during the mineral precipitation. The C2H6 is detected in hydrothermal quartz vines in metasedimentary rocks from the Jeonjoo-il, Youngbokari and Taechang mines. The $CH_4 /CO_2$ rations in W-Mo bearing quartz veins range from 0.005 to 0.214, which is similar with those in Au-Ag mines. However, skarn formation stage. Fluid inclusions, A relatively good correlation between Na and Cl contentrations reflects varible salinity in the fluid inclusion, it is suggested that the chemistry of promary magmatic hydrothermal fluids has changed during post-magmatic alteration and/or wall rock alteration processes. The content of gas compositions also depends on the kinds of country rocks, supporting above conclusion.

  • PDF

DEVELOPING PREDICTIVE METHOD FOR FOREST SITE DISTRIBUTION USING SATELLITE IMAGERY AND TPI (TOPOGRAPHIC POSITION INDEX)

  • Kim, Dong-Young;Jo, Myung-Hee
    • 대한원격탐사학회:학술대회논문집
    • /
    • 대한원격탐사학회 2008년도 International Symposium on Remote Sensing
    • /
    • pp.281-284
    • /
    • 2008
  • Due to the remarkable development of the GIS and spatial information technology, the information on the national land and scientific management are disseminated. According to the result of research for an efficient analysis of forest site, it presents distinguishing of satellite image and methodology of TPI (Topographic Position Index). The prediction of forest site distribution through this research, specified Gyeongju-si area, gives an effect to distinguishing honor system through Quickbird image with the resolution 0.6m. Furthermore it was carried out through TPI grid that is abstracted by DEM, slope of study area and type of topography, as well as it put its operation on analysis and verification of relativity between the result of prediction on forest site distribution and the field survey report. It distinguishes distribution of country rock that importantly effects to producing of soil, using 1: 5000 forest maps and grasping distribution type of soil using satellite image and TPI, it is supposed to provide a foundation of the result on prediction of forest site. With the GIS techniques of analysis, inclination of discussion, altitude, etc, and using high resolution satellite image and TPI, it is considered to be capable to provide more exact basis information of forest resources, management of forest management both in rational and efficient.

  • PDF

시추코어 분석 및 데이터베이스화를 위한 칼라 코어스캐너의 응용 (Applicability of Color Corescanner to the Analysis and Data-base of Drill Cores)

  • 김중열;;김유성;현혜자
    • 한국지반공학회:학술대회논문집
    • /
    • 한국지반공학회 2001년도 봄 학술발표회 논문집
    • /
    • pp.249-256
    • /
    • 2001
  • Optical Color Corescanner firstly developed by DMT-GeoTec, Germany and further upgraded through the Korea-Germany joint project is capable of duplicating the core surfaces. The tool uses a digital CCD line camera. As the core is rotated by an electric motor, the camera scans the uppermost line, everytime with a circumferential increment of up to 0.05mm(20pixels/mm) and hence a complete 360$^{\circ}$ unwrapped image(core image) is produced. This paper illustrated diverse research benefits of such core images from several test sites in our country. All scanned images could be stored as a data-base one and easily used with software facilities \circled1 to evaluate a percental distribution of mineral components or grain size etc. not only for the rock classification but also for e.g. the assessment of building stones, \circled2 to study potential reservoirs as a hydrocarbon indicator using ultraviolet fluorescence reflection from cores, \circled3 to facilitate the qualitative and quantitative analysis of fractures, \circled4 to evaluate the fractures and thin bedded reservoirs using spectral color responses. Based on abundant scanning experiments, it would seem that this imaging work should lead to reflecting the future trend in underground survey toward a more comprehensive understanding of the properties and behaviors of in situ rocks.

  • PDF

필댐의 전기비저항 탐사시 전기매체에 의한 영향 분석 연구 (Interference effect by electric utilities at electric resistivity Survey of fill dam)

  • 김재홍;신동훈;임은상
    • 한국지반공학회:학술대회논문집
    • /
    • 한국지반공학회 2009년도 세계 도시지반공학 심포지엄
    • /
    • pp.1037-1040
    • /
    • 2009
  • Using much most electricity electric resistivity survey by nondestructiveness inquiry enforcement design of country base equipment business and facilities preservation administration dimension electric resistivity survey sends and cause much effects in survey believability by electricity medium of survey personality survey contiguity that grasp base special quality by potential difference flowing current artificially in base. Is item that enforce in most in-suite although when make electric resistivity survey until present, electricity medium or effect research by electricity origination was gone much. There is shortcoming that must be difficult to know correct underground utilities establishment state in-suite in this research and do comparison examination running parallel drilling investigation to heighten believability of electric resistivity survey. Did to dam that censure data that regulate grading from construction and is censure construction which can know correctly interior base situation comparatively to electricity medium of interior and electricity eruption won of contiguity and base condition (base rock).

  • PDF

고속도로변 사면경관의 인지적 관계분석 (Analysis on Perceptual Relationship in the Slope Scene of Highway)

  • 정성관;박정길
    • 한국조경학회지
    • /
    • 제20권3호
    • /
    • pp.33-43
    • /
    • 1992
  • The perceptual characteristic on the slope scenery around highway is very similar as the general perceptual characteristic in the landscape. This process determines by the relationship between the scenery observers and the characteristics of its place. It is very important to have a analysis on highway slope scenery in our particular culture in Korea since our country's highways are done by cutting mountains : therefore, we have a lot of slopes around highways. The physical characteristics on the highway scenery determines how we should build scenery around highway to a satisfactory level. The results drawn from this research work are as follow: 1) The satisfaction for slope scene had been affected by sex, native and experience of travel. I thought that the slope scene having peculiar form will offer the highest satisfaction. 2) Psychological factor, reflected satisfaction of slope scene, 몽 a grip of three factors as the factor of evaluation, texture, formation, and presumption formula is : Satisfaction=1.04(Evauluation factor)+0.83(Texture factor)+0.15(Formation factor)+4.28)R2=0.69). 3) Vine among the vegetation componeents of slope scene highly correlated with the evaluation factor and grass, shrub correlated with the texture factor. 4) Rock among the structual components of slope scene highly correlated with the formation factor, and stockade, lattice correlated with the evalution factor. 5) Gradient among the properties which determined slope form, highly correlated with the formation factor.

  • PDF

Status of Community Drinking Water in Korea and Implications for Appropriate Management

  • Lee, Jin-Yong;Park, Youngyun;Kim, Nam-Ju;Jeon, Woo-Hyun
    • 한국지하수토양환경학회지:지하수토양환경
    • /
    • 제18권6호
    • /
    • pp.56-68
    • /
    • 2013
  • Community drinking water (CDW), mostly naturally flowing groundwater, plays important roles in supplying drinking water for urban and rural residents in Korea. Over 1,600 CDW facilities are distributed throughout the country, many of them situated in the outskirts of metropolitan cities. A large proportion of Korean people have become dependent on CDW for drinking due to a distrust of piped water's quality and a strong belief in the special medicinal effects of some CDWs. However, administrative and official management and the control of CDW facilities have been inadequate when compared with the strict examination and control of commercial bottled water, which is physically treated groundwater from deep bedrock aquifers. In this study, even though signs of anthropogenic contamination were not generally found, the tested chemical compositions of selected CDWs featured high enrichment of some constituents including Ca, Mg, Na, and HCO3 with natural origins such as water-rock interactions. Careless consumption of particular CDWs, which has no scientific basis, will not guarantee health improvement. Consequently, more intensive management of CDW facilities and a long-term interdisciplinary examination of the health effects of CDWs are needed to effectively protect people's health.

The Effects of Business Management Practices on Financial Performance: Evidence from Freight Forwarders in the Philippines

  • MATIAS, Rock Bryan B.;BUNGATO, Guillermo C. Jr.
    • The Journal of Asian Finance, Economics and Business
    • /
    • 제8권12호
    • /
    • pp.169-181
    • /
    • 2021
  • The study aims to investigate the direct effects of business management practices in terms of financial, marketing, human resources, and logistics operations practices on sales revenue and profitability growth of freight forwarding businesses. A quantitative research design and partial least square-structural equation modeling were used to examine the direct effects of the exogenous and endogenous variables. The study reveals that financial, marketing, and human resources practices have a positive and significant effect on sales revenue growth. Furthermore, marketing and logistics operations have a positive and significant effect on profitability growth in the context of freight forwarding in the Philippines, particularly in its country's capital. As the current study only examines the direct effects of business management practices, other researchers may also want to consider identifying other variables as mediation and moderation to test other indirect effects on the financial performance of the business. The findings of the study can significantly benefit the freight industry to consider addressing other challenges or make use of the paper to further develop their strategies and practices to improve their financial performance.

국내 골재석산의 분포와 유형 분석 (Geology and Distribution of Crushed Aggregate Resources in Korea)

  • 홍세선;이창범;박덕원;양동윤;김주용;이병태;오근창
    • 자원환경지질
    • /
    • 제37권5호
    • /
    • pp.555-568
    • /
    • 2004
  • 국내에서의 골재의 수요는 1980년대 이후 급속한 경제성장과 더불어 빠르게 증가되어 왔다. 국내 골재 생산량 중 하천골재의 비율은 약 25%, 바다골재 20∼25%, 육상골재 약 5%이며, 산림골재는 약 40∼50%를 점하며 거의 모든 굵은 골재의 공급을 담당하고 있다. 산림골재는 지역적으로 고르게 분포하고 있으나 서울, 부산 등 광역시를 중심으로 그 주변에 집중되는 경향을 보인다. 국내 산림골재로서 개발되는 암석은 심성암류 27%, 변성암류 32%, 퇴적암류와 화산암류가 각각 18%를 차지한다. 암종별로 보면 전체 골재석산에서 화강암 대상이 25%, 편마암 20%, 사암 10%, 안산암 10%의 비율을 보이고 있다. 석재로 이용되는 암종은 국내 암석 종류 중 15개 암종에 불과하지만 골재로 이용되는 암종은 석재 이용 암종의 2배인 29종으로 심성암류는 화강암, 섬장암, 섬록암, 반화강안, 반암, 규장암, 맥암 등이며, 화산암류는 유문암, 안산암, 조면암, 현무암, 응회암, 화산각력암 등이다. 또한 변성암류에서는 편마암, 편암, 천매암, 슬레이트, 변성사암, 규암, 혼펠스, 석회규산염암, 각섬암 등이 사용되고, 퇴적암에서는 사암, 셰일, 이암, 역암, 석회암, 각력암, 쳐트 등이 이용된다. 이들 암종들 중에는 석재로 사용하기 어려운 셰일, 이암, 화산각력암 등이 포함된다. 석재에서는 화강암이 70∼80%의 점유빈도를 보이지만 골재에서는 25% 정도의 점유율만을 보인다. 두 번째로 많이 이용되는 암종은 편마암으로 전체 점유율 중 20% 정도 차지한다. 그리고 사암과 안산암이 10% 내외 정도의 점유율을 보인다. 도별 점유현황을 살펴 보면 충북에서 심성암의 비율이 가장 높고 그 다음으로 전북, 강원, 경기도의 순으로 심성암의 점유율이 감소하며 경남과 전남이 12%, 10%로 가장 낮은 점유율을 보인다. 이러한 현상은 보통 70∼80%의 심성암 점유율을 보이는 석재자원과는 매우 다른 형태이다. 전남지역은 화산암 골재가 50% 이상이며, 경남은 퇴적암 골재가 50% 이상을 점한다. 또한 변성암의 골재 사용비율은 경기도, 충남에서는 거의 50% 수준에 육박한다. 골재 석산은 경기도, 경북, 경남, 충북에서 거의 비슷한 비율로 분포하며 오히려 전북에서의 골재 석산의 수는 적은 편에 속한다. 강원도가 골재석산의 수가 가장 적은 편이다.

고등학생의 학교폭력에 영향을 미치는 요인에 관한 연구 : 인성요인을 중심으로 (A study on factors affecting high school students of school violence - Focusing on personality factors -)

  • 이정덕;장정현
    • 시큐리티연구
    • /
    • 제42호
    • /
    • pp.393-422
    • /
    • 2015
  • 학교는 학생의 효과적인 학업성취와 지적능력 개발을 위해 공교육을 실현하는 거점임과 동시에 최전선의 위치를 담당하고 있다. 비단 학업뿐만 아니라 사회의 한 구성원으로써 타인과 함께 하기위한 배려와 이해의 폭을 넓혀주는 공간이기도 하다. 그러나 우리나라 학교교육의 현실은 타인을 배려하고 책임감을 느끼는 삶의 태도와 관련된 인성교육에 대해서는 부족한 면이 많다는 지적을 받고 있다. 한 개인이 성인으로 성장해 나가는 데에는 지적능력뿐만 아니라 정서적인 측면이 반드시 필요하고, 학교에서는 그와 관련된 다양한 방법을 가르치는 것이 의무화되어 있다. 그럼에도 불구하고 우리나라 중등교육은 교사들의 과도한 행정업무를 비롯한 기타 업무로 인해 인성교육의 과정이 소홀해 지거나 형식적인 활동을 벗어나지 못하고 있다. 이러한 영향으로 학생들의 문제적 행동을 개선하지 못하는 결과를 가져왔으며, 결국 학교폭력과 같이 타인에게 직접적인 피해를 주는 심각한 사회문제를 야기한 측면이 있다. 따라서 이 연구는 교육학과 범죄학의 청소년비행 행위에 기초하여 인성의 개념을 구체화하고 학교폭력과의 관계를 경험적 연구를 통해 검증하고자 하였다. 이에 따라 2013년 7월 1일부터 2013년 9월 31일 까지 전국 277개교에 재학 중인 고등학교 3학년 학생들 중 경기도에 소재한 K대학의 입학설명회 및 모의전형에 참여한 학생들 중 무응답과 분석에 사용할 수 없다고 판단된 자료를 제외하고 최종분석에서 총 1045명의 자료가 활용되었다. 그 결과 학교폭력 피해경험이 많고, 남자학생일 수 록 학교폭력의 가해 경험이 많을 것으로 나타났다. 또한 건강한 학생일수 록 학교폭력의 가해경험이 많고, 분노조절과 공감, 배려의식이 낮은 학생이 학교폭력의 가해경험이 많은 것으로 나타났다.

  • PDF