학술논문
Thermodynamic Model for Assessing Thermal Stress Distribution between the Shaft Concrete Wall and Surrounding Deep Rocks.
Document Type
Article
Author
Source
Subject
*STRESS concentration
*CONCRETE walls
*YIELD surfaces
*ROCK properties
*STRAINS & stresses (Mechanics)
*YIELD stress
*THERMAL stresses
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Language
ISSN
0039-2316
Abstract
The geotemperature can reach 60°C at mining depth of 2000 m. The physical and mechanical properties of rocks will change with geotemperature, affecting the stress state of surrounding rock in deep excavation. In this paper, a thermodynamic model is applied to describe the stress and deformation process of rock material through the free energy function and dissipation equation, and yield surface, flow rule and plastic function are not considered in the elastic-plastic model, which greatly simplifies the calculation process. The developed finite element simulation program used to simulate the change of the stress between the rock and shaft wall. The temperature change induces thermal stresses between surrounding rock and shaft wall, especially at their interface. The results provide worthy support for the shaft failure and disaster prevention in deep engineering. [ABSTRACT FROM AUTHOR]