On Damage and Fracture Mechanics of Shaft Lining Under Complicated Loads With Freezing Method

摘要

Based on the stress characteristics of freeze shrinking shaft lining at construction and operation stages, it is set up that The anisotropic damage model including initial damage, which suit to make Damage and Fracture Mechanics analysis for the shaft lining. A 3 dimensional anisotropic damage program is compiled using FEPG software, which take the following factors into consideration: temperature, conduction conditions, concrete facture energy and its aggregate gradation. Take the liangbosi mine shaft lining for example, its damage evolutionary process under complicated stresses such as permanence field stress, the gravity and vertical additional stress changed with time is obtained. It is discussed that the facture's position and its development process, and the mechanical mechanics of the shaft lining structure failure.