Numerical Study of Effect of Joint Tip Distance from Sample End on Rock Failure

Abstract:

In this paper,the mechanical properties of rock experiencing the variation of joint tip distance from sample end under uniaxial compression condition were simulated.Numerical simulation for the different rock sample in the uniaxial compression have been conducted to evaluate the effects of joint tip distance from sample end on the overall mechanical behaviour of jointed rock masses. It was done using the Rock Failure Process Analysis program RFPA^2D. Numerically simulated stress-strain curve, peak stress, peak strain and failure patterns were compared with the corresponding physical tests. We found that specimen joint tip distance from sample end corresponding value (distance from the crack tip to the compression surface) linear relationship with the compressive strength values .Numerical simulations agree well with physical results, it is shown that RFPA^2D is suitable for the analysis of joint tip distance from sample end effect on rock fracture.

• Periodical: Applied Mechanics and Materials (Volumes 501-504)
• Pages: 244-247
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.501-504.244
• Online since: January 2014
• Authors: Yun Jie Zhang, Cheng Fan*
• Keywords: Failure Pattern, Joint Tip Distance from Sample End, Uniaxial Compressive Strength

References

[1] BROWN E T. Strength of models of rock with intermittent joints[J]. Journal of the Soil Mechanics and Foundations Divsion, 1970, 96(6): 1935－(1949).

DOI: 10.1061/jsfeaq.0001479

[2] YANG Z Y, Chen J M, HUANG T H. Effect of joint sets on the strength and deformation of rock mass models[J]. International Journal of Rock Mechanics and Mining Sciences, 1998, 35(1): 75－84.

DOI: 10.1016/s1365-1609(98)80024-5

[3] SINGH M, RAO K S, RAMAMURTHY T. Strength and deformational behavior of a jointed rock mass[J]. Rock Mechanics and Rock Engineering, 2002, 35(1): 45－64.

DOI: 10.1007/s006030200008

[4] KUMAR D, DAS S K. An experimental study of the parameters influencing ultimate bearing strength of weak floor strata using physical modeling [J]. Journal of Geotechnical and Geo environmental Engine, 2005, 23(1): 1－15.

DOI: 10.1007/s10706-003-3158-4

[5] HALAKATEVAKIS N, SOFIANOS A I. Strength of a blocky rock mass based on an extended plane of weakness theory[J]. International Journal of Rock Mechanics and Mining Sciences, 2010, 47: 568－82.

DOI: 10.1016/j.ijrmms.2010.01.008

[6] P.P.L. Wasantha P.G. Ranjith. Influence of the geometry of partially-spanning joints on the uniaxial compressive strength of rock [J]. International Journal of Rock Mechanics & Mining Sciences 50 (2012) 140–146.

DOI: 10.1016/j.ijrmms.2012.01.006