Abstract
The anisotropy of deformation and strength behavior in quartz mica schist is fundamental to rock mechanics. Here, we concentrated on the practical application of the numerical simulation of the anisotropy of schist rock. First, the existence of the anisotropy of the schist rock in engineering application was reported, tested in situ, and analyzed. Then, a set of specially designed multi-angle uniaxial compression tests was conducted. Based on these, two numerical simulation methods (explicit and implicit) for anisotropy were demonstrated and discussed. Between the two methods, the implicit method was more practical. Ultimately, the implicit method was adopted to perform an excavation simulation of the exploratory tunnel CPD-1. Our findings demonstrated the feasibility of the implicit method as a practical numerical method to determine the anisotropy of schist rock.
Highlights
As one of the four fundamental issues of rock mechanics, anisotropy has been extensively investigated [1].Determining the deformation and strength parameters of the anisotropic rock mass is one of the most important aspects of the rock engineering practice.Rock anisotropy refers to the characteristic that various properties of the rock vary with direction
We focused on the practical application of numerical simulations to determine the anisotropy of schist rock
We used the anisotropy of the mechanical behavior of quartz mica schist in the Danba Hydropower Project, China, as a case study
Summary
As one of the four fundamental issues of rock mechanics (i.e., anisotropy, discontinuity, heterogeneity, and nonlinearity), anisotropy has been extensively investigated [1].Determining the deformation and strength parameters of the anisotropic rock mass is one of the most important aspects of the rock engineering practice.Rock anisotropy refers to the characteristic that various properties of the rock (e.g., mechanical, thermal, and hydraulic) vary with direction. As one of the four fundamental issues of rock mechanics (i.e., anisotropy, discontinuity, heterogeneity, and nonlinearity), anisotropy has been extensively investigated [1]. Determining the deformation and strength parameters of the anisotropic rock mass is one of the most important aspects of the rock engineering practice. Rock anisotropy refers to the characteristic that various properties of the rock (e.g., mechanical, thermal, and hydraulic) vary with direction. The main reason for the anisotropy of rock is the existence of bedding, schism, interlayering and directional fracture systems that develop in rock. Research on rock anisotropy often considers anisotropic rock as an assemblage of micro-fractured rock masses
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