Method for realizing visualization of rock crushing process based on EDEM

Abstract

The invention discloses a method for realizing visualization of a rock crushing process based on an EDEM. The method comprises the steps of constructing a rock physical model; obtaining rock particleposition information and establishing a force chain network model; defining a mechanical relationship of bonding bonds among particles in the model and acquiring intrinsic mechanical parameters of therock; calculating bond bearing information in the force chain network model under the action of an external load, judging the bond by utilizing a fracture criterion of the bond, judging whether crackaggregation intersection is formed or not, and when two sections of the crack are expanded to the surface of the rock, enabling the rock to form macroscopic fracture. According to the invention, thefracture position information and model reconstruction information of the bonding bond in the whole process are calculated to realize visualization of the rock crushing process; the stress change of the bonding bonds in the crushing process is analyzed from the microcosmic perspective, the fracture sequence of the bonding bonds in the crushing process is analyzed from the microcosmic perspective,the rock crushing characteristics are analyzed from the macroscopic perspective, visualization of the rock crushing process is achieved, and the rock crushing mechanism is conveniently analyzed and researched.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a method for realizing the visualization of rock breaking process based on EDEM. Background technique [0002] Rock crushing is an extremely complicated deformation process, which not only involves the changes of multiple physical quantities, but also is accompanied by the growth, expansion and aggregation of cracks. Therefore, in order to study the essence of crushing, it is necessary to use the relevant theories of contact mechanics, mesoscopic mechanics and statistical mechanics to analyze the rock crushing process from the perspectives of microcosm, mesocosm and macrocosm. However, the current experimental research can only analyze the rock crushing process from a macro perspective, and it is difficult to realize the visualization of the rock crushing process. Therefore, the computer is widely used as a device for simulating rock breaking and analyzing the r...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems existing in the prior art that the analysis of material breaking process does not take into account the real micro-geometric multi-scale characteristics of the rock, nor does it take into account the change of the bond strength during the particle breaking process, and it is impossible to accurately simulate the rock. In view of the shortcomings of the real crushing process, a method based on EDEM to realize the visualization of the rock crushing process is proposed. This method can analyze and record the generation, expansion and aggregation of cracks in the rock crushing process from the mesoscopic, microscopic and macroscopic perspectives, and realize the analysis of the rock crushing process. simulation and visualization of

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