The creep test results on hard structural plane in T GP's permanent lock regions are represented,and the creep status of structural plane under the acting of a constant load are emphatically analysed.Based on exp erimental study,the shear creep constitution equations of structural planes are proposed.The study results indicate that the shear creep displacements of struct ural planes are not only a function of duration of added load,but also depend on the magnitudes of exerted normal compression stresses and shear stresses.All co efficients in these creep equations increase with increasing of the ratio of she ar stress and creep shear strength of structural planes. 