Abstract：The alluvium traversed by shaft in mine becomes thicker and thicker along with the development of deeper mine construction. The high-strength reinforced concrete shaft lining is adopted in deep alluvium. For high-strength reinforced concrete shaft lining，its mechanical characteristics are analyzed by experiment and theory. The experimental results show that the ultimate bearing capacity of the high-strength reinforced concrete shaft lining is much great. The factors that influence the ultimate bearing capacity of the high-strength reinforced concrete shaft lining are，in turn，the strength grade of concrete，the ratio of thickness to radius and the ratio of reinforcement. Under the condition of uniformly loading，when the strength of concrete increases 10 MPa，the ultimate bearing capacity of shaft lining increases 4 MPa. However，the effect of the ratio of reinforcement on the ultimate bearing capacity of shaft lining is very small. When the shaft lining comes to failure，there is an inclined crack in the high-strength reinforced concrete shaft lining，and the circumferential reinforced steel bars bend at the inclined crack. The failure of high-strength reinforced concrete shaft lining is compression-shear mode，and the angles between the failure plane of concrete and the direction of the maximum principal stress are 25°–30°. Using the linear softening constitutive model and Mohr-Coulomb strength criterion，the theoretical formula of ultimate bearing capacity is deduced for the high-strength reinforced concrete shaft lining. The results obtained by formula agree well with the experimental data.
