The evolution regularity and influence factor analysis of zonal disintegration around deep jointed rock mass: a numerical study based on DEM

2021 ◽  
Vol 81 (1) ◽  
Author(s):  
Long Chen ◽  
Shunchuan Wu ◽  
Aibing Jin ◽  
Xue Li
Keyword(s):  
Factor Analysis ◽  
Rock Mass ◽  
Influence Factor ◽  
Numerical Study ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Zonal Disintegration

Stress-dependent anisotropy index of strength and deformability of jointed rock mass: insights from a numerical study

2019 ◽  
Vol 78 (8) ◽  
pp. 5905-5917 ◽  
Author(s):  
Na Wu ◽  
Zheng-zhao Liang ◽  
Ying-chun Li ◽  
Hong Li ◽  
Wan-run Li ◽  
...  
Keyword(s):  
Rock Mass ◽  
Numerical Study ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Anisotropy Index ◽  
Stress Dependent

Numerical Study on Tunnel Mechanics in Jointed Rock Mass with Finite Element Method

2011 ◽  
Vol 99-100 ◽  
pp. 790-795
Author(s):  
Ming Gao Zhang ◽  
Heng Bin Wu ◽  
Ze Ping He ◽  
Ting Qiang Zhou
Keyword(s):  
Finite Element ◽  
Rock Mass ◽  
Plastic Zone ◽  
Lateral Pressure ◽  
Numerical Study ◽  
Pressure Coefficient ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Lateral Pressure Coefficient ◽  
Element Method

Tunnel mechanics mainly depend on joints properties in layered and jointed rock mass, and most of the present methods adopted in numerical analysis are distinct element method. Combining to the Gaixiaba tunnel, considering the jointed properties such as dip angles, distances and lateral pressure coefficient, the finite element models are made in this paper. Results show that the plastic zone and total displacement presented a symmetric distribution with the axial of joints dip, and the plastic zone is very similar to the results suggested by Goodman. The dip angles, distances of joints and lateral pressure coefficient have significant effect on the tunnel mechanics.

scholarly journals Experimental and Numerical Study of the Uniaxial Compressive Stress-Strain Relationship of a Rock Mass with Two Parallel Joints

2019 ◽  
Vol 65 (2) ◽  
pp. 67-80
Author(s):  
L. X. Xiong ◽  
H. Y. Yuan ◽  
Y. Zhang ◽  
K. F. Zhang ◽  
J. B. Li
Keyword(s):  
Compressive Strength ◽  
Rock Mass ◽  
Uniaxial Compressive Strength ◽  
Numerical Study ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Rock Bridge ◽  
Vertical Loading ◽  
Joint Fracture ◽  
Dip Angle

AbstractA “rock bridge”, defined as the closest distance between two joints in a rock mass, is an important feature affecting the jointed rock mass strength. Artificial jointed rock specimens with two parallel joint fractures were tested under uniaxial compression and numerical simulations were carried out to study the effects of the inclination of the rock bridge, the dip angle of the joint, rock bridge length, and the length of joints on the strength of the jointed rock mass. Research results show: (1) When the length of the joint fracture, the length of the rock bridge, and the inclination of the rock bridge stay unchanged, the uniaxial compressive strength of the specimen gradually increases as the inclination of the joint fracture increases from 0°to 90°. (2) When the length of the joint fracture, the length of the rock bridge, and the inclination of the joint fracture stay unchanged, the uniaxial compressive strength of the specimen shows variations in trends with the inclination of the rock bridge increasing from 30° to 150° (3). In the case when the joint is angled from the vertical loading direction, when the dip angle of the joint fracture, the inclination of the rock bridge, and the length of the rock bridge stay unchanged, the uniaxial compressive strength of the specimen gradually decreases with an increasing length of joint fracture. When the dip angle of the joint fracture, the inclination of the rock bridge, and the length of the joint fracture stay unchanged, the uniaxial compressive strength of the specimen does not show a clear trend with an increase of the length of the rock bridge.

scholarly journals Numerical Study on Crack Propagation in Brittle Jointed Rock Mass Influenced by Fracture Water Pressure

Materials ◽  
2015 ◽  
Vol 8 (6) ◽  
pp. 3364-3376 ◽  
Author(s):  
Yong Li ◽  
Hao Zhou ◽  
Weishen Zhu ◽  
Shucai Li ◽  
Jian Liu
Keyword(s):  
Rock Mass ◽  
Crack Propagation ◽  
Numerical Study ◽  
Water Pressure ◽  
Jointed Rock ◽  
Jointed Rock Mass
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