STABILITY CALCULATION FOR DISCRETE FRACTURE NETWORK OF ROCK MASSES BASED ON JOINT FINITE ELEMENT METHOD
WANG Yu1，2，LI Xiao1，LIU Shuai3，HE Jianming1，LI Shouding1，LI Tengfei1，2
(1. Key Laboratory of Engineering Geomechanics，Institute of Geology and Geophysics，Chinese Academy of Sciences，Beijing 100029，China；2. University of Chinese Academy of Sciences，Beijing 100049，China；3. Faculty of Engineering，
China University of Geosciences，Wuhan，Hubei 430074，China)
Abstract：Through stability of many fractured rock masses slopes on Guangle highway，conclusion obtained that objective geological model，appropriate constitutive relation，accurate parameters and effective calculation method are the key problems for stability evaluation. The joint finite element method(JFEM) is proposed. In the method，the fractured rock massed are composed of rock block and fracture network，the properties of rock block and joint are considered simultaneously，reflecting the nonlinear relation of contaction fully. Firstly，based on the single structure surface theory proposed by Jaeger，the compression strength of fractured rock massed is calculated by JFEM，which verifies the reliability of the JFEM. Secondly，introducing discrete fracture network model，the stability of fractured rock masses is discussed based on Voronoi model，Baecher model and Veneziano model. The generalized Hoek-Brown criterion and Barton-Bandis criterion are applied to rock block and joint，respectively. Using the strength reduction method to calculate stability factor，the influences of key parameters in DFN on the slope stability are discussed. The research provides a new idea for the stability evaluation of fractured rock masses and theoretical basis to engineering decision.
王 宇1，2，李 晓1，刘 帅3，赫建明1，李守定1，李腾飞1，2. 岩体离散裂隙网络稳定性计算的节理有限元法[J]. 岩石力学与工程学报, 2013, 32(s2): 3337-3345.
WANG Yu1，2，LI Xiao1，LIU Shuai3，HE Jianming1，LI Shouding1，LI Tengfei1，2. STABILITY CALCULATION FOR DISCRETE FRACTURE NETWORK OF ROCK MASSES BASED ON JOINT FINITE ELEMENT METHOD. , 2013, 32(s2): 3337-3345.
2013, Vol. 32 
