Numerical Study on Influence of Joint Characters on Rock Mechanical Parameters

Abstract:

Rock mass is the syntheses composed of kinds of structure and structured surfaces. The joint characters is influencing and controlling the rock mass strength, deformation characteristics and rock mass engineering instability failure in a great degree. Through using the RFPA2D software, which is a kind of material failure process analysis numerical methods based on finite element stress analysis and statistical damage theory, the uniaxial compression tests on numerical model are carried, the impact of the trace length of rock joints and the fault throws on rock mechanics parameters are studied. The results showed that with the gradual increase of trace length,compression strength decreased gradually and its rate of variation getting smaller and smaller, the deformation modulus decreased but the rate of variation larger and larger; with the fault throws increasing, the compression strength first increases and then decreases, when the fault throw is equal to the trace length, the deformation modulus is the largest. When the joint trace length is less than the fault throw, the rate of the deformation modulus is greater than that of trace length, but the deformation modulus was not of regular change.

• Periodical: Advanced Materials Research (Volumes 201-203)
• Pages: 2909-2912
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.201-203.2909
• Online since: February 2011
• Authors: Yan Feng Feng, Tian Hong Yang, Hua Wei, Hua Guo Gao, Jiu Hong Wei
• Keywords: Compressive Intensity, Deformation Modulus, Fault Throw, Trace Length

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