Mesoscopic mechanical effect on sandstone corroded by acid mine drainage
Abstract：Through meso-tests and mechanical tests of sandstone corroded by AMD solution with pH values of 1.25 and 3.38 ,the change rules of meso-structure and mechanics characteristic of sandstone were analyzed. Fractal theory was applied to describe the distribution of the meso-structure and fractal dimensions （D） of SEM image of sandstone by AMD were obtained. A chemical damage variable （w） was introduced based on the variety of elastic modulus, and the relationship between w and D was established. The results show that it has fractal characteristics, there is linear correlation between w and D, while pH value of AMD solution is 1.25, w = 0.78D- 1.62, while pH value is 3.38, w = 0. 97D-2. 04. The linear coefficient between w and D is higher than 0. 98. The mechanical effect of sandstone by AMD is revealed on meso-level.
Keywords：acid mine drainagesandstonemeso-structuremechanical effectfractal dimension
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 931-935 )