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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.72 No.4
- 발행연도
- 2019.1
- 수록면
- 469 - 477 (9page)
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초록· 키워드
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The understanding of tool-rock interaction mechanism is of high essence for improving the rock breaking efficiency and optimizing the drilling parameters in mechanical rock breaking. In this study, the tool-rock interaction models of indentation and cutting are carried out by employing the discrete element method (DEM) to examine the rock failure modes of various brittleness rocks and critical indentation and cutting depths of the ductile to brittle failure mode transition. The results show that the cluster size and inter-cluster to intra-cluster bond strength ratio are the key factors which influence the UCS magnitude and the UCS to BTS ratio. The UCS to BTS strength ratio can be increased to a more realistic value using clustered rock model so that the characteristics of real rocks can be better represented. The critical indentation and cutting depth decrease with the brittleness of rock increases and the decreasing rate reduces dramatically against the brittleness value. This effort may lead to a better understanding of rock breaking mechanisms in mechanical excavation, and may contribute to the improvement in the design of rock excavation machines and the related parameters determination.
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참고문헌 (43)
참고문헌 신청
O.K. Ajibose / 2015 / Experimental studies of the resultant contact forces in drillbit–rock interaction / International Journal of Mechanical Sciences 91:3~11
Block, G. / 2009 / Role of failure mode on rock cutting dynamics / SPE 124870, 2009 SPE Annual Technical Conference and Exhibition
N. Cho / 2007 / A clumped particle model for rock / International Journal of Rock Mechanics and Mining Sciences 44(7):997~1010
Da Fontoura, S. A. B. / 2011 / Rock mechanics aspects of drill bit rock interaction / 12th ISRM Congress International Society for Rock Mechanics
Z Fang / 2002 / Application of a local degradation model to the analysis of brittle fracture of laboratory scale rock specimens under triaxial conditions / International Journal of Rock Mechanics and Mining Sciences 39(4):459~476
Block, G. / 2009 / Role of failure mode on rock cutting dynamics / SPE 124870, 2009 SPE Annual Technical Conference and Exhibition
N. Cho / 2007 / A clumped particle model for rock / International Journal of Rock Mechanics and Mining Sciences 44(7):997~1010
Da Fontoura, S. A. B. / 2011 / Rock mechanics aspects of drill bit rock interaction / 12th ISRM Congress International Society for Rock Mechanics
Z Fang / 2002 / Application of a local degradation model to the analysis of brittle fracture of laboratory scale rock specimens under triaxial conditions / International Journal of Rock Mechanics and Mining Sciences 39(4):459~476
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