Analysis on Variable Bond Strength Failure Criterion of Layered Rock Mass Based on Numerical Simulation and Model-Test

Abstract:

The layered rock mass consists of kinds of stratifications whose mechanical properties are not wholly identical with each other. In order to figure out its strength failure criterion, the variable bond strength failure criterion is proposed depending on Mohr-Coulomb yield criterion and the change law of the strength parameters varying with the dip angle of stratification plane (that is the angle between the maximum principal stress and the stratification plane). What’s more, the criterion is verified by physical model test and numerical simulation adopting assembly language VC++6.0. Compared with the results of physical model tests and numerical simulation, it is shown that the stress distributions and failure regions are elliptic in shape and that the maximum failure regions are vertical to the stratification planes. That the results obtained in the physical model test are compatible with those numerically obtained verifies the correctness of variable bond strength failure criterion.

• Periodical: Advanced Materials Research (Volumes 243-249)
• Pages: 2220-2228
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.243-249.2220
• Online since: May 2011
• Authors: Bin Wei Xia, Jie Wang, Yi Yu Lu, Yong Kang, Dong Li
• Keywords: Layered Rock, Mohr-Coulomb Criterion, Numerical Simulation, Physical Model Test

References

[1] Binwei Xia: Experimental Study on the Mechanism of Instability of Layered Rock Mass in Deep Buried Tunnel (Chongqing University, Chongqing 2009 )(in Chinese).

[2] Mingchuan Guo: Measurement of Volume Ratio of Rock Block and Mechanical Behavior of Layered Rock Mass (National Central University, Taiwan 1994)(in Chinese).

[3] Xuemin Zhang:Anisotropic Characteristic of Rock Material and Its Effect on Stability of Tunnel Surrounding Rock (Central South University, Hunan 2007)(in Chinese).

[4] R. McLanmore and K. E. Gray: Trans. Am. Soe. Mech. Eng. Series B Vol. 89(1967), pp.62-79.

[5] Ramamurthy, Rao and Singh: proc.5th Australia-New Zealand Conf. on Geomechanics Vol.1(1985) p.253.

[6] J. A. Singh, T. Ramamurthy and G. V. Rao: Indian Geotech. J. Vol.19 (1988) ,p.147.

[7] P. B. Attewell, M. R.Sanford: Int. J. Rock Mech. Min. Sei. and geom.Abstr. Vol. 11 (1974),pp.431-438.

[8] E. T. Brown, L. R. Richards and M. V. Barr: Proceedings of the Conference of Rock Engineers, Newcastle Upon tyne(1977) pp.31-51.

[9] Daqian Zhou: Acta Petrolei Sinica Vol.9(1988), pp.87-97(in Chinese).

[10] Yujun Zhang, Yiping Liu: Rock and Soil Mechanics Vol. 22 (2001), pp.254-257.

[11] Xiaojun Zhou, Yang Gao, Zelong Li and Changyu Yong: Modern Tunneling Technology Vol.43(2006), pp.13-21(in Chinese).

[12] Changrui Han, Bo Zhang, Shiwei Bai and Binwei Xia: Rock and Soil Mechanics Vol.29(2008), pp.2404-2408(in Chinese) .

[13] Xuefu Yu, Yingren Zheng and Huaiheng Liu: Stability Analysis of Surrounding Rocks of Underground Engineering (China Coal Industry Publishing House, Beijing 1983)(in Chinese).