Based on the laboratory tests

the fractal characteristics of granularity for loose micaschist were studied by the fractal geometry theory; and the relevance of the fractal dimension with coarse granule and shear strength parameters was discussed. The results show that: (1) the change trend of fractal dimension is inversely related to the coarse granulae

that is the fractal dimension will increase with the decrease of coarse granulae; (2) according to the calculations

when the fractal dimension is in the range of 1.887-2.631 the size distribution grading of loose micaschist is good

which indicated that the fractal dimension can take the place of Cu and Cc to represent the size distribution grading of loose rock materials; (3) there is a better relevance between the value of fractal dimension and internal friction angle under the fine grading

and the functional relation of which is negative exponent

but the regularity is not obvious between the cohesive and the fractal dimension.