A damage mechanical model applied to analysis of mechanical properties of jointed rock masses

2019 ◽  
Vol 84 ◽  
pp. 113-128 ◽  
Author(s):  
Wendong Yang ◽  
Qianbing Zhang ◽  
P.G. Ranjith ◽  
Rangang Yu ◽  
Guangyu Luo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Model ◽  
Jointed Rock ◽  
Rock Masses ◽  
Jointed Rock Masses

scholarly journals Analysis of Changes in the Micromorphology of Sandstone Joint Surface under Dry-Wet Cycling

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Jingcheng Fang ◽  
Huafeng Deng ◽  
Yu Qi ◽  
Yao Xiao ◽  
Hengbin Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Friction Angle ◽  
Jointed Rock ◽  
Joint Surface ◽  
Roughness Coefficient ◽  
Rock Masses ◽  
Jointed Rock Masses ◽  
Bank Slope ◽  
Steep Decrease ◽  
The Face

Changes in the micromorphology of joint surface under dry-wet cycling have a direct effect on the mechanical properties of the jointed rock masses, which in turn affects the deformation stability of the bank slope of a reservoir. In this study, we design and carry out a test that aims to quantity the effects of repeated rise and fall of a reservoir on the properties of a jointed rock masses. The results are as follows: first, the roughness, local gradient, and undulation of the joint surface gradually decreased under repeated dry-wet cycling. In addition, the height parameters and texture parameters showed a steep decrease followed by a slow decline. The deterioration was particularly obvious over the first 5 dry-wet cycles. Second, the roughness coefficient of the joint surface, the compressive strength of the face wall, and the basic friction angle were gradually reduced under dry-wet cycling. The shear strength of the jointed rock masses (obtained both quantitatively and experimentally) showed a deteriorating trend controlled by the deterioration of the micromorphology, the strength of the face wall, and the frictional properties of the joint surface. Finally, the dry-wet cycling process determined trends of changes in the microstructure parameters and mechanical properties of the joint surface. Our research results provide a good basis for the analysis of the deterioration and failure of rock masses within the hydrofluctuation belt of a bank slope.

Experimental study on the mechanical properties of simulated columnar jointed rock masses

2014 ◽  
Vol 12 (1) ◽  
pp. 80-89 ◽  
Author(s):  
Wei-min Xiao ◽  
Rong-gui Deng ◽  
Zhi-bin Zhong ◽  
Xiao-min Fu ◽  
Cong-yan Wang
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Jointed Rock ◽  
Rock Masses ◽  
Jointed Rock Masses

Crack Propagation of Jointed Rock and Application

2011 ◽  
Vol 117-119 ◽  
pp. 476-479
Author(s):  
Jing Wang ◽  
Wei Shen Zhu ◽  
Hai Ping Ma
Keyword(s):  
Mechanical Properties ◽  
Rock Mass ◽  
Crack Initiation ◽  
Crack Propagation ◽  
Failure Process ◽  
Jointed Rock ◽  
Rock Masses ◽  
Stress Strain ◽  
Jointed Rock Masses

Brittle media, such as rock mass, usually contain a great number of joints or cracks, which lead to varying mechanical properties and failure behaviors of different rock masses. In this paper, the DDARF method is adopted to simulate the crack initiation, propagation, coalescence and failure process in rock masses prefabricated with the different crack number and spacing under loading. The corresponding stress-strain curves and strength envelope are obtained. The parameters are applied in a case study. The differences in the failure behaviors of the intact and jointed rock masses after cavern excavation are analyzed and compared.

scholarly journals Development of a damage rheological model and its application in the analysis of mechanical properties of jointed rock masses

2019 ◽  
Vol 7 (3) ◽  
pp. 1016-1031 ◽  
Author(s):  
Wendong Yang ◽  
Guangyu Luo ◽  
Kang Duan ◽  
Wenjun Jing ◽  
Lianzhen Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Rheological Model ◽  
Jointed Rock ◽  
Rock Masses ◽  
Jointed Rock Masses
Sign in / Sign up

Export Citation Format

Share Document