Modelling of Hydro-mechanical Coupling for Fractured Rocks Using Continuum-based Discrete Element Method
This paper aims to model the coupled hydro-mechanical behavior of fractured rocks. First of all,disk-shaped fractures are generated by applying stochastic approaches to capture uncertainty in the knowledge of fractures. Secondly, a block cutting technique and the successive space subdivision approach are developed to use the sequentially introduced disk-shaped fractures to cut through the study domain. As a result, a fracture-block system, which is an assemblage of discrete blocks interfaced by explicitly represented fractures, is constructed to represent a fractured rock. Thirdly, a continuum-based discrete element method, which encompasses the strong points of finite element method and discrete element method and offset those weaknesses, is proposed to model the mechanical behaviour of block system and fluid flow of fracture networks, respectively. A loose coupling algorithm is then applied to simulate the coupled fluid flow and mechanical deformation, in which two independent flow and mechanics simulators solve the mechanical and hydraulic equations, but output and input information is passed at designated time intervals in both directions between the two simulators.
Liu Xiaoyu Liu Yang Zhang Li Li Shihai
Institute of Mechanics,Chinese Academy Sciences,Beijing,100080,China
国际会议
北京
英文
288-302
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）