Numerical Simulation Study On Mechanics And Deformation Behave Of Impure Salt Rock Based On Mesomechanics

As salt rock boasts not only low porosity,low permeability and high creep deformation but also properties of self-healing and low natural self-recovery,it serves as the ideal material for storing oil,gas,nuclear waste,etc.C hina is rich in salt rock resources,but most of them are largely impure.The shapes,sizes and spatial distribution of impurities e xert huge influences on the mechanical properties of salt rock.Based on the experimental study and theoretical study on salt rock,mudstone and layered salt rock by experts at home and abroad,with using ABAQ US,mesomechanics and finite element theory,this paper studies the properties of stress,deformation behavior and creep of salt rock with granular impurities under uniaxial load and triaxial load,mainly focusing on three aspects as follows:1.The two-dimensional finite element model of salt rock samples with random particle size,random content and random distribution was established by means of RSA random order adsorption method.ABAQUS finite element simulation software was used to establish the two-And the three-dimensional salt rock model are simulated by uniaxial and triaxial load compression respectively.The mises stress,normal stress,shear stress and strain are simulated.;2.The three-dimensional finite element model of salt rock samples with random particle size,random content and random distribution was established.The numerical simulation of uniaxial and triaxial load compression was carried out.The mises stress,normal stress and shear Stress,strain and so on.The results show that the shape,size,content and spatial distribution of particulate impurities affect the mechanical properties of salt rock.;3.The finite element simulation software was used to simulate the single and triaxial compression creep values of the two-dimensional slice model.The stress-strain curves of the different paths were analyzed.