Fractured rock mass seepage simulation method and system based on near-field dynamics

Abstract

The invention discloses a fractured rock mass seepage simulation method and system based on near-field dynamics. The method comprises the steps: building a fractured rock mass fluid-solid coupling model comprising a solid layer and a fluid layer based on the near-field dynamics, and discretizing the fractured rock mass fluid-solid coupling model into a plurality of material points according to a rock mass material and a rock mass volume; solving the solid layer to obtain the elongation of the solid bonds of the material points, judging whether the elongation of the solid bonds of the materialpoints meets the damage condition or not, and obtaining the local damage degree of the rock mass; solving the fluid layer to obtain the fracture permeability of the fluid layer, taking the pore waterpressure obtained according to the fracture permeability as the initial condition of the solid layer in the next iteration time step until the fractured rock mass seepage process is completed, obtaining the rock mass local damage condition, and outputting the whole process to simulate the fractured rock mass seepage. Effective simulation of the seepage behavior of the fractured rock mass under thefluid-solid coupling effect is achieved.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a method and system for simulating seepage of fractured rock mass based on peridynamics. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] There are a large number of pores and fissures in natural rock mass. Under the action of groundwater seepage, not only the strength of rock mass is reduced, but also the expansion of fissures is aggravated. In geotechnical engineering activities, the seepage of fractured rock mass is one of the important factors that induce geological disasters such as surrounding rock instability, structural damage, and rock mass collapse. Theoretical basis and scientific basis. Numerical simulation has the advantages of strong visualization and good repeatability. Establishing an efficient numerical analys...

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Problems solved by technology

Although peridynamics has achieved a good research foundation in the deformation and failure of homogeneous materials and the simulation of seepage in porous media, there is still a lack of effective simulation theory and calculation methods in the seepage of fractured rock mass, and the existing methods are difficult to realize. Simulation of Fluid-Solid Interaction Failure Process of Fractured Rock Mass Driven by Fluid Pressure

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