Rock mass two-dimensional microscomic season cracking power function type model

A power function, rock mass technology, applied in the field of engineering rock mass meso-aging fracture analysis, which can solve the problems of lack of adaptability, inability to reflect the shear rupture strength with different parallel bonds, and without considering the influence of bonding moment.

Active Publication Date: 2017-04-26
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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Problems solved by technology

In addition, this type of model also has the following shortcomings: (1) The shear fracture criterion between particles is a horizontal line parallel to the normal stress of the parallel bond, that is, the shear rupture criterion is consistent with the normal stress state of the parallel bond Irrelevant, as long as the parallel bond shear stress is greater than or equal to the fixed parallel bond shear rupture strength, shear fracture can occur between particles, which can

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  • Rock mass two-dimensional microscomic season cracking power function type model
  • Rock mass two-dimensional microscomic season cracking power function type model
  • Rock mass two-dimensional microscomic season cracking power function type model

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[0047] The following describes the model of the present invention in detail with reference to the drawings, specific construction steps and implementation examples. The example description is only used to assist the understanding of the present invention, and does not limit the actual application scope of the present invention. After reading the present invention, those skilled in the art can modify various equivalent forms of the present invention within the scope defined by the claims of the present invention.

[0048] Note: All the labels in the manual have a formula written before it, such as formula (1), are formula labels.

[0049] Such as Figure 1~Figure 10 As shown, the two-dimensional meso-scale aging fracture power function model of the present invention is suitable for two-dimensional particle discrete element, two-dimensional particle discontinuous deformation analysis method, two-dimensional particle manifold element; the power function model includes consideration of...

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Abstract

The invention discloses a rock mass two-dimensional microscomic season cracking power function type model. The power function type model comprises a rock mass microscomic particle bonding stress two-dimensional mode considering a bending moment contribution factor, a two-dimensional power function type mode, considering the bending moment contribution factor, of microscomic particle bonding season deterioration attenuation, a Mohr-Coulomb microscomic particle bonding season cracking criterion considering a bending moment contribution effect and having a stretch cutoff limit, and a microscomic particle linear contact two-dimensional model considering a damping effect. The model is suitable for rock masses with a characteristic that the relationship between the stress and the crack propagation speed accords with the power function type, and provides technical support for long-term stability prediction, evaluation and optimization design of surrounding rocks of deep rock mass engineering in a plane state.

Description

Technical field [0001] The invention relates to the technical field of engineering rock mass meso-aging fracture analysis, in particular to a two-dimensional meso-aging fracture power function model of rock mass. Background technique [0002] The instability and damage of deep rock mass engineering after excavation often do not happen immediately after excavation. Generally, there are obvious deformation and fracture timeliness and catastrophe (rockburst, large deformation, etc.) hysteresis, which seriously harms the engineering Construction safety and long-term operation. At present, there are relatively few research results on time efficiency in the mesoscopic aspect. The article "Deeply buried marble fracture propagation time effect particle flow simulation" conducted experiments and two-dimensional numerical analysis of the time effect of Jinping marble fracture (Chinese Journal of Rock Mechanics and Engineering, 2011, Vol.30No.10:1989-1996 ); "Numerical Simulation Research...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 黄书岭丁秀丽李欢邬爱清徐平张练周黎明高源朱良韬
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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