Abstract
The macroscopic mechanical properties of soil are essentially determined by its microstructure, which is a comprehensive manifestation of the external microstructure of soil. This paper conducts microscopic tests on coal-bearing soil with different moisture content under dry-wet circulation conditions, and uses Image-Pro Plus software to preprocess and image the SEM images of coal-bearing soil samples to characterize the size and orientation of coal-bearing soil particles and pores. The microstructure parameters of average diameter and orientation frequency of shape and orientation are quantitatively analyzed, revealing the change rule of the microstructure parameters of unsaturated coal-bearing soil under dry-wet circulation.
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