Underground cavern surrounding rock complex block modeling and stability analysis integrated method

Abstract

The invention relates to underground engineering three-dimensional modeling and analysis, and discloses an underground cavern surrounding rock complex block modeling and stability analysis integrated method which realizes rapid modeling and automatic analysis and calculation so as to reduce the modeling and analysis working intensity of design engineers and improve the design working efficiency. According to the method, on the basis of an underground cavern model, a block sliding surface is established through the exposed position and occurrence of the block; direction judgment and cutting operation are carried out based on the block sliding surface, a surrounding rock block feature object is generated, and attribute assignment is carried out; feature decoding on the surrounding rock block feature object is performed, and the analyzed information is stored in an external file; finite element analysis software is called to read and analyze the file; a block three-dimensional model is reconstructed according to the analysis information, block identification and sliding surface numbering are performed, and then integrated solution and computational analysis are performed; and the stress magnitude and direction of the unit and node of each sliding surface are extracted according to the solving result, then the safety coefficient of the whole block is calculated, and a stability analysis report is outputted.

Description

technical field [0001] The invention relates to three-dimensional modeling and analysis of underground engineering, in particular to a method for integrating complex block modeling and stability analysis of surrounding rocks in underground caverns. Background technique [0002] The structural space span of underground caverns is large and the geological conditions are complex, so the efficiency of completing block structure modeling is low. Converting the block model into an intermediate format file such as STEP loses the attribute information and the corresponding relationship. Imported into the finite element analysis software, it cannot automatically divide the grid, assign material values, load application and calculation analysis, and cannot realize the integration of rapid block modeling and stability analysis, and cannot meet the rapid and dynamic evaluation of block stability and safety during the construction process. needs, and make block support design parameters...

AI Technical Summary

Problems solved by technology

Imported into the finite element analysis software, it cannot automatically divide the grid, assign material values, load application and calculation analysis, and cannot realize the integration of rapid block modeling and stability analysis, and cannot meet the rapid and dynamic evaluation of block stability and safety during the construction process. needs, and make block support design parameters

[0003] Judging from the published literature and data, tools and methods for the integration of feature modeling and stability analysis of surrounding rock in complex underground caverns have not been found. The current process and methods cannot meet the requirements of rapid and accurate engineering design and on-site construction. requirements

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