摘要：Taking tailings soil as the research object,we conduct consolidation test and SEM scanning experiment on 4 groups of tailings matrix modified soil to explore the changes of matrix modified soil with consolidation pressure,soil compressibility and microstructure changes in iron tailings environment.The research results show that: (1) Under the natural structure state,the tailings matrix modified soil has a complex pore structure,irregular surface contours and large particle dispersion.The improvement measures of composite application of 2% organic fertilizer and 30% loess mixed with the tailings matrix improved soil has a greater impact on the soil structure.(2) As the consolidation pressure increases,the average shape coefficient of the tailings matrix modified soil increases significantly,and the porosity fractal dimension,probability and fractal dimensions all decrease,indicating that the consolidation pressure makes the void structure of the soil uniform.The degree of chemistry increases,the smoothness of the pores increases significantly,the orientation and order of the pore arrangement increases,and the complexity decreases.(3) The fractal dimension and porosity fractal dimension have a large impact on the microscopic characteristic parameters of the pores of the tailings matrix modified soil.The average shape coefficient and probability entropy have small impacts on the compressibility.The microstructure parameters can reflect the macroscopic mechanical properties.This research can provide a scientific reference for the mine ecological environment restoration project.
