High-accuracy conversion method for ground stress calculation result among different scale models

A technology for calculating results and in-situ stress, which is used in calculations, special data processing applications, instruments, etc. It can solve the problems of large errors and the reliability of the initial stress field needs to be improved, so as to improve the accuracy and reliability, achieve high-precision conversion, Well-designed effects

Active Publication Date: 2018-01-26
STATE GRID CORP OF CHINA +2
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Problems solved by technology

However, this method also has certain defects, that is, the fitting of the initial in-situ stress function only selects the regression stress values ​​of a small number of units on some sections of the underground powerhouse area for fitting, and the obtained initial in-situ stress function and regression fitting stress are consistent with the measured The error of the stress is large, and the reliability of the initial stress field of the underground powerhouse area calculated by regression fitting needs to be improved

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  • High-accuracy conversion method for ground stress calculation result among different scale models
  • High-accuracy conversion method for ground stress calculation result among different scale models
  • High-accuracy conversion method for ground stress calculation result among different scale models

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Embodiment Construction

[0053] In order to clearly illustrate the technical features of the solution, the solution will be described below through specific implementation modes.

[0054] This implementation provides a method for high-precision conversion of in-situ stress calculation results between models of different scales, including the following steps:

[0055] Step 1: Comprehensively consider the influence of factors such as the terrain and geological conditions of the power station project, the layout type and section size of underground caverns, and the distribution of in-situ stress measurement points on the inversion of the in-situ stress field, and establish a large-scale inversion for the initial in-situ stress field. Geostress inversion model;

[0056] Among them, the large-scale geostress inversion model considers unfavorable geological structures such as faults and soft rocks, and uses natural boundaries such as valleys and gullies. The simulation scope includes: part of the upper rese...

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Abstract

The invention discloses a high-accuracy conversion method for ground stress calculation result among different scale models. In the method, according to a finite element fundamental theory, a stress conversion calculation formula among different models is deduced, and high-accuracy conversion from a large-range stress inversion model stress calculation result to a fine calculation model is realized on the basis of the back calculation of a result data file. The method does not need to carry out regressive calculation of the initial stress of new grid points again due to the calculation of thechange of a calculation model, and a foundation is laid for subsequent calculation and research. The beneficial effects of the scheme can be obtained by narration for the above scheme, and calculationefficiency is improved. Compared with a traditional method that a mathematical statistics method is adopted to fit an initial stress function in an engineering area, the method is characterized in that calculation accuracy and reliability can be improve.

Description

technical field [0001] The invention relates to the field of underground engineering, in particular to a method for high-precision conversion of ground stress calculation results between models of different scales. Background technique [0002] The initial in-situ stress field of the rock mass reflects the natural stress state existing in the formation, and is the main "load" for the deformation of the surrounding rock of the underground cavern group. For the analysis of the deformation mechanism of the surrounding rock of the underground cavern group, the study of the construction method and the optimization of the support scheme, the initial stress field of the rock mass is a necessary condition for the numerical simulation and stability analysis of the underground engineering. Is the applied initial stress field real? To a large extent, it determines the rationality of the research results. [0003] On-site measurement of in-situ stress is the most direct and effective w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 王槐袁长安彭福元徐卫中郑德湘唐然勇苏超赵业彬
Owner STATE GRID CORP OF CHINA
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