Based on the mercury penetration experiment data

the pore structure fractal features and the relationship between pore structure fractal features and permeability were analyzed in order to document the genesis of ore-bearing layer of a sandstone-type uranium deposit from Xinjiang. The pore structure of ore-bearing layer

with similar fractal features and formation mechanism in general

shows bifractal features.The big pore structure

with larger fractal dimension value

shows higher degree of complex than the small pore structure. The fractal dimension value of the big pore structure

can be used as a proxy of the permeability of the ore-bearing layer.The high value suggests the low permeability. The fractal dimension value of the small pore structure can not be used to estimate the permeability. Difference of fluid modification degrees on pore structures for different pore sizes is possibly an important factor for forming bifractal features of the pore structure of the ore-bearing layer.