Strength Attenuation and Post Failure Behaviour of Fine Sandstone

Abstract:

Three types of physical tests were designed to study post failure behaviour and strength attenuation of fine sandstone. Tests include rock compression test, rock unloading test and rock block shear test. The stress-strain curves at different confining pressures had been obtained as well as axial strain-lateral strain curves. The differences of axial strain-lateral strain curves exhibit that stress peak point and the point of fault formation are apparently different for the rock. After the fault is generated, fractured rock slides on the fault surfaces, while confining pressure, material strength and structure effect decide the post failure behaviour. Damaged rock specimens were poured in concrete specimens as well as irregular blocks. Material strength of rock blocks was attained. Shear strength gradually attenuates with unloading points close to the peak. Past the stress peak, rock blocks from fractured rock still have considerable material strength. It is shown that there are differences of strength parameters obtained from direct shear test and triaxial test.

• Periodical: Advanced Materials Research (Volumes 446-449)
• Pages: 3538-3543
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.446-449.3538
• Online since: January 2012
• Authors: Ji Jun Zhou, Huai Fu, Yue Zhang, Yan Li, De Zhang
• Keywords: Post Failure Behaviour, Strain Catastrophe, Strength Attenuation, Structure Effect

References

[1] J. J. Zhou, R. L. Shan, H. Wang and K. Yin: Ming Research and Development. Vol. 3(2010), pp.30-33 (In Chinese).

[2] Y. S. Wu and X. B. Yu: Metal Mine. 388(2008), pp.25-28. (In Chinese)

[3] C. Chang and B. Haimson: Int J Rock Mech Min Sci. Vol. 42(2005), pp.402-414.

[4] J. X. Ren, X. R. Ge and Y. B. Pu: Journal of Xi' an Highway University. Vol. 2(2000), pp.12-14 (In Chinese).

[5] S. Chen, Z. Q. Yue and L. G. Tham: Int J Rock Mech Min Sci. Vol. 41(2004), pp.937-957.

[6] F. Zhang, Q. Sheng and Z. Q. Zhu: Chinese Journal of Rock Mechanics and Engineering. Vol. supply 1(2008), pp.2651-2655 (in Chinese).

[7] L. R. Alejano, A. Rodriguez-Dono and E. Alonso: Tunneling and Underground Space Technology. Vol. 24(2009), pp.689-705.

[8] N. Cho, C. D. Martin and D. C. Sego: Int. J. Rock Mech Min Sci. Vol. 45(2008), pp.1335-1246.

[9] J. A. Hudson and J. P. Harrison: ENGINEERING ROCK MECHANICS, An Introduction to the Principles, pergamon, 1997.

[10] A. Kozušníková and K. Marecková: Int. J. Rock Mech Min Sci. Vol. 36(1999), P. 243-251.

[11] S. H. Zhang and X. X. Miao: Journal of Xiangtan Mining Institute. Vol. 4(1997), P. 1-5 (In Chinese).

[12] S. Q. Yang, Y. Z. Jiang and W. Y. Xu: International Journal of Solids and Structures. Vol. 45(2008), pp.4798-4811.

[13] W. P. Schellart: Tectonophysics. Vol. 324(2000), pp.1-16.