Test Study on Effect of Joint on Rock Mass Mechanical Property

Abstract:

Strength, elastic modulus and failure modes of samples with different joint dip angle, joint continuity degree, joint set and joint width under uniaxial compressive load are studied by similar material tests. To the sample with single joint, its strength, elastic modulus and failure mode are controlled by joint dip angle to much extent, and it will shear and slip along or split across joint face to fail, in which sample’s strength and elastic modulus is minimum corresponding to the first failure mode. To the jointed sample with different joint continuity degree, its strength and elastic modulus decrease with joint continuity degree, and effect on sample’s strength is much more serious. With increase of joint set, sample’s strength and elastic modulus gradually decrease. With increase of joint width, strength and elastic modulus decreases, and effect on sample’s strength is much more serious.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 235-239
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.235
• Online since: December 2012
• Authors: Hong Yan Liu, Yu Shi Huang, Zeng Zuo Ma Dan
• Keywords: Elastic Modulus, Failure Mode, Joint, Strength, Uniaxial Compress

References

[1] P.H.S.W. Kulatilake, W.He, T.Um, etc. A physical model study of jointed rock mass strength under uniaxial compressive loading [J]. Int. J. Rock Mech. & Min. Sci. 34(1997):3-4

DOI: 10.1016/s1365-1609(97)00123-8

[2] M. Prudencio, M. Van Sint Jan. Strength and failure modes of rock mass models with non-persistent joints [J]. Int. J. Rock Mech. & Min. Sci. 44(2007):890-902

DOI: 10.1016/j.ijrmms.2007.01.005

[3] Shuangjian Niu, Hongwen Jing, Kun Hu, etc. Numerical investigation on the sensitivity of jointed rock mass to various factors [J]. Mining Science and Technology 20(2010):530-534

DOI: 10.1016/s1674-5264(09)60238-6

[4] Tai-Tien Wang, Tsan-Hwei Huang. A constitutive model for the deformation of a rock mass containing sets of ubiquitous joints [J]. Int. J. Rock Mech. & Min. Sci. 46(2009):521-530

DOI: 10.1016/j.ijrmms.2008.09.011

[5] Shengqi Yang, Yonghao Dai, Lijun Han, etc. Uniaxial compression experimental research on deformation and failure properties of brittle marble specimen with pre-existing fissures [J]. Chinese Journal of Rock mechanics and Engineering, 2009, 28(12): 2391-2404 (in Chinese)

[6] Zhigang Zhang, Chunsheng Qiao, Xiao Li. Experimental study on the strength of single joint rock mass[J], China Railway Science, 2007, 28(4): 34-39 (in Chinese)