The comparative study on analytical solutions and numerical solutions of displacement in transversely isotropic rock mass

2016 ◽  
Author(s):  
Zhizeng Zhang ◽  
Zhao Zhao ◽  
Yongtao Li
Keyword(s):  
Rock Mass ◽  
Comparative Study ◽  
Analytical Solutions ◽  
Numerical Solutions ◽  
Transversely Isotropic ◽  
Transversely Isotropic Rock ◽  
Isotropic Rock ◽  
The Comparative Study

scholarly journals Optimization of Measuring Points Layout around a Tunnel in the Transversely Isotropic Rock Mass

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Zhizeng Zhang ◽  
Yongtao Li ◽  
Weili Yang ◽  
Shunchuan Wu ◽  
Xiaoli Liu ◽  
...  
Keyword(s):  
Rock Mass ◽  
Lateral Pressure ◽  
Back Analysis ◽  
Transversely Isotropic ◽  
Anisotropic Rock ◽  
Maximum Displacement ◽  
Transversely Isotropic Rock ◽  
Isotropic Rock ◽  
Anisotropic Rock Mass ◽  
Principle Of Maximum

The arrangement of measuring points has a great impact on the uniqueness and accuracy of the back analysis of displacement. To explore the arrangement method of measuring points in the anisotropic rock mass, the principle of maximum displacement is applied to study the optimization of measuring points layout around a tunnel in the transversely isotropic rock mass. Firstly, the criterion of maximum displacement is deduced. Secondly, the variations of displacement with angle and radius are analyzed, respectively, and two key lateral pressure coefficients are obtained. Thirdly, some principles of measuring points arrangement are summarized according to the criterion of maximum displacement. Finally, an example is given to prove the correctness of these principles. These principles can be used to guide the arrangement of displacement measuring points in the transversely isotropic rock mass, especially suitable for shaft excavation in horizontal sedimentary rock.

Displacement Analytic Solution of a Deep Elliptical Tunnel in Transversely Isotropic Rock Mass

2011 ◽  
Vol 402 ◽  
pp. 593-597
Author(s):  
Zhi Zeng Zhang ◽  
Jin Hu Zhang ◽  
Dong Qi Hou ◽  
Xiao Peng Chen
Keyword(s):  
Rock Mass ◽  
Layered Structure ◽  
Transversely Isotropic ◽  
Mapping Method ◽  
Transversely Isotropic Rock ◽  
Variable Expression ◽  
Layered Rock ◽  
Transversely Isotropy ◽  
Isotropic Rock ◽  
Layered Rock Mass

Sedimentary rocks with layered structure account for two third of global land area, and this proportion is 77.3% in China, lots of metamorphic rocks also have significant features of layered structure, so there are a large number of stability problems about layered rock mass in mining engineering. Layered rock mass is generally considered to be transversely isotropic solid in mechanics. Based on the complex variable expression of displacement components of transversely isotropy, the displacement analytical solution of a deep elliptical tunnel in transversely isotropic rock mass is derived by conformal mapping method.

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