Producing Mechanism and Distribution Laws of Remote Cracks for Geotechnical Engineering Structure

Abstract:

The purpose of this paper is to investigate producing mechanism and distribution laws of remote cracks for geotechnical engineering structure. The fracture modes of geotechnical material containing a hole with different lateral confining pressure coefficients of 0, 0.05, 0.1, 0.15, 0.25, 0.33, 0.75 and 1 were numerically simulated using RFPA2D (rock failure process analysis) code. The results indicate that under a certain confining pressure, three types of cracks, i.e., primary crack, remote crack and shear crack, can be observed simultaneously in the same sample. When the lateral pressure coefficient is satisfied that 0

• Periodical: Applied Mechanics and Materials (Volumes 50-51)
• Pages: 869-874
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.50-51.869
• Online since: February 2011
• Authors: Hou Quan Zhang, Xing Gen Huang, Li Bing Xue, Yan Feng Zhang
• Keywords: Distribution Laws, Lateral Confinement, Producing Mechanism, Remote Cracks

References

[1] Hoek, E. and Brown, E.T. Underground Excavations in Rock. London: The Institution of Ming and Metallurgy, (1980).

[2] Lajtai, E.Z. and Lajtai, V.N. The collapse of cavities. Int. J. Rock, Min. Sci. & Geomech. Abst., 12(1) (1975) 81-86.

DOI: 10.1016/0148-9062(75)90001-7

[3] Carter, B.J. and Lajtai, E.Z. Stress and time-dependent fracture around cavities in physical models of Potash salt rock. In Hudson J. A. ed. Proc. ISRM Symposium: Eurock'92, Chester, Rock characterization, Imperial College, London, (1992) 269-274.

[4] Martin, C.D. Seventeenth Canadian geotechnical colloquium: the effect of cohesion loss and stress path on brittle rock strength. Can. Geotech. J., 34(5) (1997) 159-168.

DOI: 10.1139/t97-030

[5] Fu, Y.F., Huang, M.L., Ren, F.Y. and Tang, C.A. Numerical analysis of crack evolution around borehole in rock sample subjected to confining pressures. Chinese Journal of Rock Mechanics and Engineering, 19(5) (2000) 577-583.

[6] Zhang H.Q., Zhao D.S., et al. Numerical Study on Fracture in Rock Surrounding a Circular Tunnel under Different Confining Pressure, In: Ohnishi Y, Aoki K, eds. Contribution of Rock Mechanics to the New Century. Rotterdam: Millpress, (2004).

[7] Tang, C.A. Numerical simulation on progressive failure leading to collapse and associated seismicity. Int. J. Rock Mech. and Min. Sci. 34(1997) 249-261.

[8] Tang, C.A., Liu, H, Lee, PKK, Tsui, Y. and Tham L.G. Numerical studies of the influence of microstructure on rock failure in unaxial compression-part I: effects of heterogeneity. Int. J. Rock Mech. Min. Sci., 37(2000) 555-569.

DOI: 10.1016/s1365-1609(99)00121-5

[9] Hudson, J.A. and Fairhurst C. Tensile strength, Weibull's theory and a general statistical approach to rock failure. The proceedings of the Civil Engineering Materials Conference, Southampton (1969) 901-904.

[10] Brady, B.H.G. & Brown, E.T. Rock Mechanics for Underground Mining, Second Edition. London: Chapama & Hall Press, (1993).

[11] КУРЛЕНЯ М. В., ОПАРИН В.Н. Проблемы нелинейной геомеханики. Ч. I. ФТПРПИ, 3(1999) 12-23.

[12] Li S. C., Wang H.P., Qian Q.H., et al. In-situ monitoring research on zonal disintegration of surrounding rock mass in deep mine roadways. Chinese Journal of Rock Mechanics and Engineering, 27(8)(2008) 1545-1553.

[13] Xu H.F., Qian Q.H., Wang F.J., et al. Application of electric resistivity method to zonal disintegration exploration of deep roadway. Chinese Journal of Rock Mechanics and Engineering, 28(1)(2009) 111-119.