Analysis of Crack Expansion Pattern after Corrosion of Fractured Sandstone Based on Particle Flow
Biaxial compression tests based on particle flow discrete element method were conducted on sandstone with prefabricated cracks after corrosion to analyze the crack initiation,extension and penetration damage laws of fractured rocks af-ter different chemical corrosion,and the experimental phenomena were analyzed using particle flow PFC2D simulations to ex-plain.The results show that:the change characteristics of the stress-strain curve of the fractured sandstone after solution corro-sion under biaxial loading with different loaded side pressures with the higher side pressure loading,the higher the peak strength.The angle of wing-shaped cracks sprouting under different chemical solution corrosion changes to different degrees,and the number and angle of wing-shaped cracks and shear cracks sprouting will produce obvious changes,among which hydro-chloric acid solution causes the greatest degree of damage to the rock.Considering chemical corrosion and mechanical proper-ties together,a numerical model of the fractured rock can be established to further analyze its behavior under different environ-ments.This is important for understanding the stability of rocks and for applications in geoengineering.
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维普
