Abstract：Water-rock interaction is one of the main reasons triggering engineering disasters in or on fractured rocks，and the key scientific problem is to accurately predict the spatio-temporal evolution behaviors of fractured rocks under water-rock interaction. The introduction of water into rock fractures modifies the mechanical properties of rock fractures through mechanical，physical and chemical interactions between water and rock minerals，and the basic concepts of water-rock mechanical，physical and chemical interactions in rock fractures are firstly presented. The effects of the three types of water-rock interactions on mechanical behaviors of rock fractures are studied using theoretical and experimental methods. The physical meaning of the effective stress coefficient in a rough rock fracture is understood as the void ratio，and a new expression of effective stress coefficient only including a few common mechanical parameters is proposed. The water-rock physical interaction induces reductions in basic friction angle and asperity strength. Water-rock chemical interaction is strongly related to pH of chemical solutions. The acidic solution has the most significant weakening effect on the shear parameters of rock fractures，followed by alkaline solutions and neutral solutions. Finally，a complete form of fracture shear criterion considering water-rock interaction is proposed，and its implications in practical rock engineering is briefly discussed.
赵志宏. 岩石裂隙水–岩作用机制与力学行为研究[J]. 岩石力学与工程学报, 2021, 40(S2): 3063-3073.
ZHAO Zhihong. Study on water-rock interaction mechanisms and mechanical behaviors of single rock fractures. , 2021, 40(S2): 3063-3073.
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2021, Vol. 40 
