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Study of Brittle Failure  

Cheon, Dae-Sung (한국지질자원연구원 지반안전연구부)
Synn, Joong-Ho (한국지질자원연구원 지반안전연구부)
Jeon, Seo-Kwon (서울대학교 공과대학 지구환경시스템공학부)
Park, Chan (한국지질자원연구원 지반안전연구부)
Publication Information
Tunnel and Underground Space / v.16, no.6, 2006 , pp. 437-450 More about this Journal
Abstract
Failure around an underground opening is a function of in-situ stress magnitudes, intact rock strength and the distribution of fractures in the rock mass. At high in-situ stress, the failure process is affected and eventually dominated by stress-induced fractures preferentially growing parallel to the excavation boundary. This fracturing is often observed in brittle type of failure such as slabbing or spatting. Recent studies dies on the stress-induced damage of rock revealed its importance especially in a highly stressed regime. As the constructions of underground structures at deep depths increased, the cases of the brittle failure also increased and furthermore spalling was occurred in Korea at low depths. To improve the stability of the underground structures at highly stressed regime, the characteristics of brittle failure should be examined, but they have not yet been properly investigated. Therefore in this report the characteristics of brittle failure such as types, failure mechanism and modeling methods etc. were considered in all aspects, based on the previous researches.
Keywords
High in-situ stress; Slabbing; Spoiling; Brittle failure;
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