Although the evaluation of the mechanical properties and behavior of discontinuous rock masses is very important for the design of underground openings,it has always been considered the most difficult *** evaluation o...
详细信息
ISBN:
(纸本)9789628014170
Although the evaluation of the mechanical properties and behavior of discontinuous rock masses is very important for the design of underground openings,it has always been considered the most difficult *** evaluation of rock mechanical properties such as deformation and strength properties can be achieved through the application of empirical relationships or by a theoretical approach based on numerical *** of the difficulties in describing the rock mass behavior is assigning the appropriate constitutive *** limitation may be overcome with the progress in discrete element software such as PFC(Particle Flow Code),which does not need the user to prescribe a constitutive model for rock ***,the micro-scale properties of the intact rock and joints are defined and the macro-scale response results from those properties and the geometry of the problem. The methodology for the rock mechanical descriptivemodel was developed in Sweden,which is a combination and evaluation of the characterization of rock mass by means of empirical relationships and a theoretical approach based on numerical modelling. In this paper,the methodology developed in Sweden for the rock mechanics descriptive model was reviewed by applying it to two tunnel *** rock mass models were generated from 2D trace sections extracted from the 3D Discrete Fracture Network (DFN) model,which was generated by Fracman(?) for representing fracture patterns in three dimensions within a given rock volume at the test *** the numerical modeling was performed with the rock mass models for two-dimensional code PFC. To assess the rock mechanical considerations for a deep repository,the tunnel scale with resolution of 30 by 30 m in the numerical model is most likely sufficient to cover rock mechanical aspects in"the repository scale".So the model size of 30m×30 m was used in PFC computations to consider the mechanical behavior of intact rock and fractures and fracture geometry. In t
暂无评论