Investigation of failure mode and shear strength of rock joints using discrete element method

2010 ◽  
pp. 255-258
Keyword(s):  
Shear Strength ◽  
Discrete Element Method ◽  
Failure Mode ◽  
Discrete Element ◽  
Rock Joints ◽  
Element Method

scholarly journals Analysis of Layered Geogrids–Sand–Clay Reinforced Structures under Triaxial Compression by Discrete Element Method

2021 ◽  
Vol 11 (21) ◽  
pp. 9952
Author(s):  
Lan Cui ◽  
Wenzhao Cao ◽  
Qian Sheng ◽  
Mingxing Xie ◽  
Tao Yang ◽  
...  
Keyword(s):  
Shear Strength ◽  
Discrete Element Method ◽  
Axial Strain ◽  
Triaxial Compression ◽  
Discrete Element ◽  
Reinforced Soil ◽  
Peak Strain ◽  
Strength Index ◽  
Apparent Cohesion ◽  
Element Method

Compared with the commonest geosynthetics-reinforced soil structures, layered geogrids–sand–clay reinforced (LGSCR) structures (School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, China) can replace granular materials with clay as the primary backfill material. Up until now, the performance of LGSCR structures under triaxial compression has been unclear. In this paper, the discrete element method was used to simulate the triaxial compression test on the LGSCR samples. Based on the particle flow software PFC3D, three types of cluster particle-simulated sand and the reinforced joints of the geogrid were constructed by secondary development. The effects of the geogrid embedment in sand layers, the number and thickness of sand layers in relation to the deviatoric stress, and the axial strain and the shear strength index of the LGSCR samples were analyzed. The results showed that laying the sand layers in the samples can improve their post-peak strain-softening characteristics and increase their peak strengths under a high confining pressure. A geogrid embedment in sand layers can further enhance the ductility and peak strength of the samples, and in terms of the shear strength index, there is a 41.6% to 54.8% increase in the apparent cohesion of the samples.

Stability Analysis of Gypsum Mine Goaf Surface Based on Discrete Element Method

2014 ◽  
Vol 580-583 ◽  
pp. 897-902
Author(s):  
Xiu Min Liu ◽  
Cong Xin Chen ◽  
Kai Zong Xia ◽  
Ping Lu Huang
Keyword(s):  
Discrete Element Method ◽  
Discrete Element ◽  
Rock Joints ◽  
Long Term Stability ◽  
Risk Areas ◽  
Horizontal Strain ◽  
Filling Method ◽  
Empty Area ◽  
Element Method

Considering rock joints, the discrete element method was used to study gypsum mine surface short-term and long-term stability. Filling method and caving method were selected as the surface treatment. Through comparison, Caving method is more suitable for handling the gob of gypsum mine. Surface movement angle and subsidence angle were obtained on the basis of the plastic zone, surface tilt rate and surface horizontal strain, and whereby draw a goaf risk areas to guide residential relocation. The research methods and conclusions in this paper can provide reference for the study of the empty area stability in gypsum mining currently.

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