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Improvement method of Mathews stability diagram method based on BQ and RQDt anisotropy

An anisotropic and stable graph technology, applied in the field of improvement of the Mathews stable graph method based on BQ and RQDt anisotropy, can solve problems that have not yet obtained anisotropic solution methods, cannot reflect RQD anisotropy, and have not obtained anisotropy Anisotropy calculation formula and other issues

Inactive Publication Date: 2021-01-08
SHAOXING UNIVERSITY
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Problems solved by technology

Deer proposed the concept of borehole RQD in 1964. Due to the following two shortcomings in the application of borehole RQD: whether the threshold value of 100 mm is reasonable for different engineering scale rock masses; the drilling direction of the borehole is limited, and the obtained RQD can only reflect local rock mass conditions, but cannot reflect RQD anisotropy
[0010] The anisotropy of RQD directly affects the quality of the rock mass, and the mechanism of the influence of RQD anisotropy on the quality of the rock mass has not yet been explored clearly
In terms of the threshold t, no scholars have given the calculation method of the optimal threshold t, so the RQD based on the optimal threshold t has not been obtained. t Anisotropy calculation formula, and the RQD that can best reflect the quality of rock mass has not yet been obtained t Anisotropy solution method

Method used

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  • Improvement method of Mathews stability diagram method based on BQ and RQDt anisotropy
  • Improvement method of Mathews stability diagram method based on BQ and RQDt anisotropy
  • Improvement method of Mathews stability diagram method based on BQ and RQDt anisotropy

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Embodiment Construction

[0155] The present invention will be further described below with reference to the accompanying drawings.

[0156] refer to Figure 1 ~ Figure 4 , a BQ, RQD based t An improved method of the anisotropic Mathews stable graph method, comprising the following steps:

[0157] 1) Calculation of rock mass quality based on BQ index, the process is as follows:

[0158] 1.1: Calculate the rock mass integrity coefficient according to structural surface parameters, the formula is as follows:

[0159]

[0160] In the formula: Jv is the number of rock mass volume joints, unit bar / m 3 ;

[0161] 1.2: The calculation formula of Jv is as follows:

[0162]

[0163] In the formula: L1, L2, ..., Ln are the lengths of the measuring lines perpendicular to the structural plane; N1, N2, ..., Nn are the number of structural planes in the same group;

[0164] 1.3: Calculate the BQ value according to the uniaxial compressive strength value of the rock and the integrity coefficient value of ...

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Abstract

An improvement method of a Mathews stability diagram method based on BQ and RQDt anisotropy belongs to the field of method improvement of the Mathews stability diagram method, and comprises the following steps: (1) rock mass quality calculation based on a BQ index; (2) generating and sectioning of a rock mass three-dimensional fracture network model; (3) drawing of an RQDt anisotropy diagram; (4)an optimal threshold t solving method based on BQ inversion; (5) an RQDt anisotropy solving method; and (6) an improved method of a Mathews stability diagram method. According to the method, the BQ theory, the fracture network model, the generalized RQD theory and inversion calculation are combined, the optimal threshold t and anisotropy of RQDt are solved, and the Mathews stability diagram methodconsidering anisotropy of RQDt is improved. The method provided by the invention is clear and is suitable for improving a Mathews stability diagram method.

Description

technical field [0001] The present invention relates to a kind of based on BQ, RQD t An improved method of the anisotropic Mathews stable graph method, especially the present invention is based on the BQ index, the crack network model and the generalized RQD theory, and calculates the RQD by inversion t The range of optimal threshold t and the optimal threshold t value, gives the RQD t Anisotropic solution method, and based on RQD t The anisotropy provides a method based on BQ, RQD t The invention relates to an improved method of an anisotropic Mathews stable graph method, which belongs to the method improvement field of the Mathews stable graph method. Background technique [0002] The Mathews stability diagram method is a kind of analysis method for the stability of the surrounding rock of the mine. It is a stability diagram method based on the Q system proposed by Mathews et al in 1980 by analyzing a large number of engineering examples. The Mathews stability diagram ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G01N3/08G06F7/58G06F30/13G06F30/20G06K9/62G06T11/20G06T17/00G06F119/14
CPCG06Q10/06393G06Q10/06395G06F30/20G06T17/00G06F7/588G06T11/203G06T11/206G06F30/13G01N3/08G01N2203/0252G01N2203/0647G06F2119/14G06F18/22G06F18/23
Inventor 胡高建
Owner SHAOXING UNIVERSITY
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