Study on Relation Between Rock Post-peak Dilatancy and Confining Pressure

The relation function of rock dilatancy and confining pressure is investigated by theoretical and experimental methods.The relationship between rock dilatancy and confining pressure is investigated by theoretical and experimental methods.It is found that the state of stress and confining pressure has a significant influence on rock dilatancy,and the main parameter of rock dilatancy is dilatancy corner and dilatancy indices.Through the relationship between dilatancy index and confining pressure,the tunnel stability analysis and rock support design can be better guided,which has a larger significance.