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论文类型：期刊论文

发表时间：2013-06-01

发表刊物：ARABIAN JOURNAL OF GEOSCIENCES

收录刊物：SCIE

卷号：6

期号：6

页面范围：2147-2163

ISSN号：1866-7511

关键字：Three-dimensional; Failure processes; Numerical centrifugal method; Critical failure surface; Acoustic emission

摘要：Little has been published on the three-dimensional (3D) simulation of the progressive failure of rock slopes, possibly because the process of failure involves a complex, nonlinear evolution from initiation, through propagation and crack. In addition, rock is typically anisotropic, which makes it difficult to identify and describe the slope constituents and failure processes accurately. Despite such difficulties, further study of the fracture process is just as important as analyzing stress fields in 3D rock slope failures. In this paper, the 3D realistic failure process analysis code using finite element programming, and an extended version of numerical centrifugal method, is used to simulate slopes failure with different dip angles. The numerical centrifugal analysis results in this paper are found that the critical failure surface develops along the weak structural surface when the slope dip angle beta is below 30A degrees; conversely, the failure surface is formed along the toe of circular sliding when beta is above 30A degrees. In addition, it is also found that whether or not including the irregularity of joint into modeling to analyze the 3D slope stability problem will lead to a significant difference in factors of safety, it can reach 8.41 % at the same slope angle. Furthermore, the acoustic emission analyzing reveals deformed location characters of rock slope during the failure processes. With such capabilities, the approach contributes significantly to the in-depth study of the mechanisms of rock slope instability process.