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发表时间：2022-10-10

发表刊物：工程力学

卷号：35

期号：1

页面范围：191-200

ISSN号：1000-4750

摘要：Discontinuous deformation and displacement analysis (DDD) is a new way
   for analyzing the slope failure process, and this method combines the
   advantage of finite element method of RFPA and discontinuous deformation
   analysis (DDA) effectively. The problems such as large displacements
   which cannot be analyzed by RFPA,by the fractured rock initiation, and
   by propagation process issues which cannot be simulated by DDA, can be
   solved by DDD. And it also revealed the whole production process of the
   microscopic crack of the slope until it is destructed. Based on the
   original method of DDD and conventional centrifugal load test mechanism,
   it has been converted into a new formation called DDD centrifugal
   loading. This method not only preserves the feature of the original DDD,
   but also attains the instability sliding surface of the slope. Based on
   the DDD centrifugal loading method, the sectional slope of west slope of
   the Heishan Iron Mine and determination of caving in actual working
   conditions that establish a two-dimensional model of the slope with
   hole. It simulated mechanism of the sliding slope with hole under the
   presence or absence of the anchor and it also analyzed the evolution of
   the shear process from microscopic cracks to macroscopic damage, the
   safety factor and the vertical and horizontal displacement vector. The
   results show that: the caving hole of the convex corners area of the
   slope is a key point of stress concentration, and there is a significant
   effect of tension on slope instability and failure process which got a
   good agreement with the actual provision of the slope. Although the
   anchor disperses stress concentration effectively, improves the safety
   factor of the slope, and reduce the displacement, it still has the
   possibility of destruction and need to observe continuously.

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