ABSTRACT
Research on water-rock interaction is one of the most important issues in the geotechnical engineering field. The essential reason effects rock mass instability and failure is related to the changes of physics, chemistry and mechanics caused by seepage pressure and hydrodynamic process, among which chemical actions redistribute elements between rock mass and water, and lead to change in rocks’ microstructure, resulting in variations on the macro mechanical properties. In general, the soft rocks have a certain bearing capacity and always integrated in natural state.After a short time reacting with water, they become expansive, softened, and disintegrative. And then their strength decrease, which are of great challenges in the supporting design and excavation of underground openings.
