Optimum model extent for numerical simulation of tunnel inflow in fractured rock

2016 ◽  
Vol 60 ◽  
pp. 21-29 ◽  
Author(s):  
Hadi Farhadian ◽  
Homayoon Katibeh ◽  
Peter Huggenberger ◽  
Christoph Butscher
Keyword(s):  
Numerical Simulation ◽  
Fractured Rock ◽  
Tunnel Inflow ◽  
Optimum Model

Numerical simulation of the electrical properties of fractured rock based on digital rock technology

2013 ◽  
Vol 10 (5) ◽  
pp. 055009 ◽  
Author(s):  
Jianpeng Zhao ◽  
Jianmeng Sun ◽  
Xuefeng Liu ◽  
Hui Chen ◽  
Likai Cui
Keyword(s):  
Numerical Simulation ◽  
Electrical Properties ◽  
Fractured Rock ◽  
Digital Rock

scholarly journals Calculation of Elastic Modulus for Fractured Rock Mass Using Dimensional Analysis Coupled with Numerical Simulation

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Fengyu Ren ◽  
Jing Zhang ◽  
Zhihua Ouyang ◽  
Hao Hu
Keyword(s):  
Numerical Simulation ◽  
Rock Mass ◽  
Elastic Modulus ◽  
Dimensional Analysis ◽  
Underground Mining ◽  
Fractured Rock ◽  
Continuum Theory ◽  
Equivalent Model ◽  
Fractured Rock Mass ◽  
Natural Rock

Underground mining activities make the fractures in the natural rock mass develop randomly. The elastic modulus of the fractured rock mass Em is changed with the redistribution and development of the fractures. An equivalent model of fractured rock mass is structured to represent the hydraulic conductivity and the rock mass strain because of the continuum theory. Dimensional analysis is very useful to build relationship of the parameters in complex physical phenomena. Based on the engineering phenomenon of groundwater flowing into the goaf along the fracture in the rock mass, a fuzzy expression among parameters such as the parameter Em, the seepage flow Q, and the exposed area of the goaf A is obtained using dimensionless analysis. To calculate the parameter Em, the fuzzy relationship is then characterized by Darcy’s law and numerical simulation. Under the scripting environment of Python, an automated program to realize the numerical simulation of all scenarios is established, which also provides convenience for drawing the dimensionless flux charts. The results show that the parameter Em can be calculated by the dimensional analysis coupled with numerical simulation. In addition, the parameter Em decreases with the increase of the parameter Q, and the integrity of rock mass is also worse. Finally, a mine example is used to verify the feasibility of the method.

Numerical Simulation Analysis on Anchored Shear Test of the Fractured Rock and the Slope Rock Mass

2013 ◽  
Vol 312 ◽  
pp. 215-219
Author(s):  
Zhi Qiang Kang ◽  
Xue Yan Zhang ◽  
Zhong Wei Luo ◽  
Xin Yu E
Keyword(s):  
Numerical Simulation ◽  
Rock Mass ◽  
Simulation Analysis ◽  
Fractured Rock ◽  
Good Control ◽  
Fissure Rock ◽  
Test Pieces ◽  
Rock Mass Deformation ◽  
Slope Rock ◽  
Bolt Reinforcement

Discussing the mechanics mechanism of bolt reinforcement of joint fissure test pieces with the method of Variable angle plate indoor model experiment, analyzing the deformation of bolt control of jointed slope combined with the numerical simulation. The results show that: the bolt reinforcement can improve not only the integrity of joint fissure rock mass, but also be a very good control of deformation of jointed slope. It established the foundation on the quantitative for evaluation of joint fissure rock mass deformation and stability.

Seepage Numerical Simulation Methods of Hard Fractured Rock Mass

2013 ◽  
Vol 423-426 ◽  
pp. 1330-1333
Author(s):  
Gang Lei
Keyword(s):  
Numerical Simulation ◽  
Rock Mass ◽  
Permeability Coefficient ◽  
Hard Rock ◽  
Fractured Rock ◽  
Triaxial Compression ◽  
Equivalent Plastic Strain ◽  
Simulation Method ◽  
Numerical Simulation Methods ◽  
Fissure Water

According to the seepage action of hard rock fissure water, a numerical simulation method is proposed in this paper. The basic mechanical properties for rock mass changed significantly during the process of secondary stress adjustments, and the rock deterioration constitutive model (RDM) can accurately reflect both the abruptness of the rock yield failure and the changes of mechanical parameters after yield. On the basis of RDM, the permeability coefficient with equivalent plastic strain function was introduced in this method which can update the permeability coefficient, and carried out numerical simulation on hard rock fissure water seepage action by FLAC3D. The results of the seepage triaxial compression experiment proved the rationality of the method.

Sign in / Sign up

Export Citation Format

Share Document