Abstract: Solute transport in rock fractures is controlled by three mechanisms of convection， diffusion， and water-rock chemical reactions. The characteristics of reactive solute transport during the dissolution of rough fractures under the dominance of different mechanisms were analyzed， and the effect of roughness on solute transport was analyzed. The research results showed that there are four types of rough fractures dissolution processes， viz. uniform， non-uniform， extremely non-uniform， and uniform-non-uniform dissolution. In convection-dominated conditions， the fractures are dissolved uniformly， in chemical reactions dominated conditions， the dissolution rate at upstream of the fluid is higher than that at downstream. The initial roughness also has an important effect on the rough fractures dissolution process. Increasing the initial roughness will increase the water-rock chemical reaction rate， and at the same time， as the water-rock chemical reaction progresses， the fractures roughness will increase after the fractures are dissolved.

Key words: rock fracture, reactive solute transport, dissolution type, roughness, convection, water-rock chemical reaction