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- W1968148944 abstract "서비스업 목적을 위한 폐갱도에 대한 안정성 평가가 수행되었다. 공동의 안정성에 영향을 주는 많은 요소들 중 주어진 암반내의 공동폭이 하나의 중요한 설계요소가 된다. 이 논문에서는 폐갱도의 안정성 평가를 위해 갱도의 크기에 대해 Lang이 제안한 한계 공동폭 기준, Mathews'stability graph method 그리고 수정 제안된 한계 공동폭 기준과 Q 시스템의 지보대책을 이용하여 안정성 평가를 실시하였다. 전체적으로 안정성평가에서 안정한 것으로 판단되지만, 저각의 수평절리가 나타나는 구간에서는 쐐기형 블록의 낙석 위험이 예상된다. 또한 상용목적으로 폐갱도를 활용할려면 구역에 따라서는 록볼트와 같은 지보대책이 필요하다. 출입구 구간은 불안정 구간으로 특히 주의가 필요한 구간이다. 과발파에 의한 갱도 천정 및 측벽에 많은 크고 작은 부석들이 존재하고 있어 부석들에 대한 제거작업이 선행되어야 한다. The stability assessment of abandoned gangway for the purpose of services was performed. Among the many factors that affect the stability of openings, the span of the opening in a given rock mass condition provides an important element of design. In this paper, the stability of gangway was assessed by the critical span curves proposed by Lang, the modified Mathews'stability graph method and using support measures of the Q system. In the evaluation of stability as a whole the gangway is considered as stable. But the rockfalls of wedge-shaped blocks were expected in the area in which the horizontal joints of low angle appear. The support measures such as local rock bolts are required to use for commercial purposes of the abandoned gangway. And entrance section may require the particular attention as unstable section. Since there are so many spalling due to bad blasting in the roof and sidewall of gangway, the scaling operations should be followed primarily." @default.
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- W1968148944 date "2012-10-31" @default.
- W1968148944 modified "2023-09-26" @default.
- W1968148944 title "Stability Assessment of Abandoned Gangway for Commercial Utilization of Services" @default.
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- W1968148944 doi "https://doi.org/10.7474/tus.2012.22.5.297" @default.
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