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A numerical inversion method for obtaining Weibull distribution parameters of roadway surrounding rock

A technology of distribution parameters and roadways, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., to achieve the effect of ensuring accuracy, accurate value range, and high reliability

Active Publication Date: 2019-01-25
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] In order to solve the technical problem of determining the parameters of roadway heterogeneously distributed fractured rock mass in the process of numerical simulation, especially the determination of geological strength index and material homogeneity coefficient parameters, the present invention provides a method for obtaining Weibull distribution parameters of roadway surrounding rock Numerical inversion method, the specific technical scheme is as follows

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  • A numerical inversion method for obtaining Weibull distribution parameters of roadway surrounding rock
  • A numerical inversion method for obtaining Weibull distribution parameters of roadway surrounding rock
  • A numerical inversion method for obtaining Weibull distribution parameters of roadway surrounding rock

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Embodiment 1

[0042] A numerical inversion method for obtaining Weibull distribution parameters of roadway surrounding rocks. The specific steps include:

[0043] Step 1. Roadway deformation monitoring includes arranging multiple roadway deformation monitoring points, counting roadway deformation values ​​and dividing the roadway deformation values ​​into multiple intervals.

[0044] The roadway deformation monitoring points selected in this step can be determined according to the length of the roadway. The distance between the measurement points can be 2-4mm, and the roadway deformation value is divided into a statistical interval at an interval of 5-10mm, which is selected according to the length of the roadway and the actual situation of the roadway. , select as many measuring points as possible for measurement and statistics.

[0045] Step 2. Interval estimation of the geological strength index of the surrounding rock of the roadway, including drilling and coring to obtain the rock qual...

Embodiment 2

[0064] This embodiment combines the engineering practice of a mining roadway in a certain mine to further illustrate the specific implementation of the present invention, using the continuum finite difference software FLAC 3D Carry out numerical simulation, and determine whether the average value of the geological strength index and the selection of the material homogeneity coefficient are reasonable according to the numerical simulation results and correlation coefficients. The process of the parameter inversion method is as follows: figure 1 As shown, the specific implementation is as follows.

[0065] A numerical inversion method for obtaining Weibull distribution parameters of roadway surrounding rocks. The specific steps include:

[0066] Step 1. Roadway deformation monitoring includes arranging multiple roadway deformation monitoring points, counting roadway deformation values ​​and dividing the roadway deformation values ​​into multiple intervals.

[0067] A number of ...

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Abstract

The invention provides a numerical inversion method for obtaining Weibull distribution parameters of roadway surrounding rock, which relates to the technical field of mining rock mechanics and solvesthe technical problem of determining parameters of roadway heterogeneous distribution fractured rock mass in the numerical simulation process. The method comprises the following steps: (1) monitoringroadway deformation; (2) interval estimation of geological strength index of surrounding rock of roadway; (3) Establishing three-dimensional numerical model by using finite element simulation software; (4) parameter setting of probability distribution of heterogeneous rock mass; (5) assigning the material parameters of the numerical model; (6) Setting boundary conditions and excavation calculationof the model; (7) extracting monitoring data to monitor roadway deformation; (8) Calculate the correlation coefficient and check the heterogeneity parameter of rock mass. This method also has the advantages of high precision of parameter inversion, conformation to the actual engineering conditions on the spot, high reliability and the like.

Description

technical field [0001] The invention relates to the technical field of mining rock mechanics, in particular to a numerical inversion method for obtaining the average value of Weibull distribution geological strength indexes of roadway surrounding rocks and the homogeneity coefficient parameters of materials. Background technique [0002] In tunnels, mining, hydropower, nuclear power and other fields of geotechnical engineering, especially in underground engineering, the development of rock mass cracks has the characteristics of randomness, shape diversity and spatial combination complexity, which makes the mechanical parameters of engineering rock mass such as elastic modulus The heterogeneity of rock mass parameters has a high degree of heterogeneity, and the heterogeneity of rock mass parameters has an important impact on the stability of the project. In severe cases, it will cause unexpected failure of support projects such as underground roadways. Studying the stability ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23Y02T90/00
Inventor 蒋力帅孔朋束佳明孙泽权王建鹏
Owner SHANDONG UNIV OF SCI & TECH
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