Abstract
Natural fractures often contain infilling materials, such as sheared-off or broken rock fragments and clay, and rock fractures can also be manually infilled by grout. Particle mechanical method was used to study the mechanical properties and cracking processes of rock specimens containing two infilled flaws under uniaxial compression testing. The uniaxial compressive strengths and Young’s moduli of rock specimen increased when the flaws were infilled, but the Poisson’s ratio did not changed monotonously under effect of grout infilling . Grout could significantly improve the mechanical properties of pre-cracked rock specimens with inclination angles of flaws smaller than 45°. In terms of failure modes, crack initiation, propagation and coalescence patterns in rock specimens changed when the flaws were infilled. There are more cracks appearing in the rock specimens containing infilled flaws , and the infilled grout mainly fails in terms of shear. The width and direction of linkage cracks in the bridge region between two flaws can be affected by the infilled grout. The linkage cracks become not evident when the flaw inclination angle is larger than 75°.
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References
Fujii, Y., Ishijima, Y.: Consideration of fracture growth from an inclined slit and inclined initial fracture at the surface of rock and mortar in compression. Int. J. Rock Mech. Min. Sci. 41, 1035–1041 (2004)
Li, Y., Chen, L., Wang, Y.: Experimental research on pre-cracked marble under compression. Int. J. Solids Struct. 42, 2505–2516 (2005)
Park, C.H., Bobe, A.: Crack coalescence in specimens with open and closed flaws: a comparison. Int. J. Rock Mech. Min. Sci. 46, 819–829 (2009)
Potyondy, D.O., Cundall, P.A.: A bonded-particle model for rock. Int. J. Rock Mech. Min. Sci. 41, 1329–1364 (2004)
Wong, L.N.Y., Einstein, H.H.: Crack coalescence in molded gypsum and Carrara marble: Part 1. Macroscopic observations and interpretation. Rock Mech. Rock Eng. 42, 475–511 (2009)
Yang, S., Wen, S., Li, L.: Experimental study on deformation and strength properties of coarse marble with discontinuous pre-existing cracks under different confining pressures. Chin. J. Rock Mech. Eng. 8, 1572–1587 (2007). (In Chinese)
Yang, S., Dai, Y.H., Han, L.J.: Experimental study on mechanical behavior of brittle marble samples containing different flaws under uniaxial compression. Eng. Fract. Mech. 76, 1833–1845 (2009)
Zhang, X., Wong, L.N.Y.: Cracking processes in rock-like material containing a single flaw under uniaxial compression—a numerical study based on parallel bonded-particle model approach. Rock Mech. Rock Eng. 45, 711–737 (2012)
Zhang, X., Wong, L.N.Y.: Crack Initiation, propagation and coalescence in rock-like material containing two flaws: a numerical study based on bonded-particle model approach. Rock Mech. Rock Eng. 46, 1001–1021 (2013)
Zhang, B., Li, S., Zhang, D.: Uniaxial compression mechanical property test, fracture and damage analysis of similar material of jointed rock mass with filled cracks. Chin. J. Geotech. Eng. 33, 1647–1652 (2012). (In Chinese)
Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (No. 51509138), Tsinghua University Initiative Scientific Research Program (No. 20151080432), the Recruitment Program of Beijing Youth Experts (2014000020124G115) and the Scientific Research Foundation of the Education Ministry for Returned Chinese Scholars, China.
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Zhou, D., Zhao, Z. (2017). DEM Modeling of Brittle Behavior of Rock Specimens with Two Infilled Flaws. In: Li, X., Feng, Y., Mustoe, G. (eds) Proceedings of the 7th International Conference on Discrete Element Methods. DEM 2016. Springer Proceedings in Physics, vol 188. Springer, Singapore. https://doi.org/10.1007/978-981-10-1926-5_95
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DOI: https://doi.org/10.1007/978-981-10-1926-5_95
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