Research of Inclination Angle Effect on Joint Rock Macromechanical Parameters

Abstract:

The joint of rock mass influences and controls the rock mass intensity, deformation characteristics and instability failure in the rock engineering to a great extent. Using the similar material simulation is of different inclination angle of non-penetration jointing and non-jointing rock mass, through using rigid servo compression machine to carry uniaxial compression test, we get a nearly same trend of joint rock mass stress-strain curve of different angle, the curve of inclination angle of 45 is analyzed, the test result shows that the compressive strength first decreases and then increases gradually with the increase of rock inclination angle. The compression intensity is its minimum when of the inclination angle of 45°, and the deformation modulus first decreases and then increases, but deformation modulus of 30° is its minimum. In addition, through the use of developed RFPA2D system to simulate on trial uniaxial compression value based on microscopic damage mechanics, we get the conclusion that the numerical analysis and test result is fitting approximately, it is validated that the numerical model can simulate joint rock well. Keywords: joint rock mass, inclination angle, uniaxial compression, compressive intensity, deformation modulus

• Periodical: Materials Science Forum (Volumes 704-705)
• Pages: 1089-1094
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.704-705.1089
• Online since: December 2011
• Authors: Yan Feng Feng, Tian Hong Yang, Hua Wei, Hua Guo Gao, Zhe Zhang
• Keywords: Compressive Intensity, Deformation Modulus, Inclination Angle, Joint Rock Mass, Uniaxial Compression

References

[1] SUN Guang-zhong. Rock mass structural mechanics [M]. Beijing: Science Press, 1988. 36.

[2] LIU Yourong. Rock mass mechanics [M]. Wuhan: China University of geosciences press, 2005. 11.

[3] Gerrard, C, M., Elastic models of rock masses having one two three sets of Joints[J], International journal of Rock Mechanics and Mining Seciences & Geo-mechanics Abstracts. 1982, 19(1).

DOI: 10.1016/0148-9062(82)90706-9

[4] BAI Shiwei, REN Weizhong, FENG Dingxiang, ZHOU Shaohuai. Research on the strength behaviour of rock containing coplanar close interm ittent joints by direct shear test [J]. rock and soil mechanics, 1999, 20(2): 10－16.

[5] ZHU Weishen, HE Manchao. Surrounding rock stability under complex condition and dynamic construction mechanics[M]. Beijing: Science press, (1995).

DOI: 10.1080/1023697x.2000.10667817

[6] LIU Gang, ZHAN Jian, SONG Hongwei, LI Haiyuan. Physical modeling of effect of joint density on deformation and failure of surrounding rocks[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(11): 1737－1741.

[7] Wang Xuebin. Effect of Joint Inclination on Deformation and Failure of Rock Specimen with A Single Joint in Plane Strain Compression [J]. Journal of Sichuan University, 2006, 38(2): 24－29.

[8] YANG Tianhong, TANG Chunan, XU Tao. Seepage character in rock failure process- theory, model and application[M]. Beijing: Science Press, 2004. 78－80.

[9] TANG Chunan, WANG Shuhong, FU Yufang. Numerical Simulate in Rock Failure Process [M]. Beijing: Science Press, 2003. 48－60.

[10] ZHU Wangcheng. Mesoscopic Numerical Model for Fracture Process of Concrete and Its Application [D]. Doctoral Dissertation of Northeastern University, 2001. 51－65.

[11] YU Qinglei. Digital Image processing-based numerical methods for failure process analysis of rock like materials [D]. Doctoral Dissertation of Northeastern University, 2008. 23－69.