Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Q anisotropy solving method based on BQ and RQDt anisotropy

A technology of anisotropy and integrity coefficient, applied in the field of Q anisotropy solution based on BQ and RQDt anisotropy, it can solve the problem that RQD anisotropy calculation formula has not been obtained, RQD anisotropy cannot be reflected, and RQD anisotropy has not been obtained. Problems such as RQD anisotropy solution method

Inactive Publication Date: 2020-12-22
SHAOXING UNIVERSITY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 yet given a calculation method for the optimal threshold t, so the calculation formula of RQD anisotropy based on the optimal threshold t has not been obtained, and the RQD parameters that can best reflect the quality of the rock mass have not yet been obtained. Anisotropic solution method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Q anisotropy solving method based on BQ and RQDt anisotropy
  • Q anisotropy solving method based on BQ and RQDt anisotropy
  • Q anisotropy solving method based on BQ and RQDt anisotropy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0164] The present invention will be further described below with reference to the accompanying drawings.

[0165] refer to Figure 1 to Figure 4 , a BQ, RQD based t Anisotropic Q anisotropy solution method, including the following steps:

[0166] 1) Calculation of rock mass quality based on BQ index, the process is as follows:

[0167] 1.1: Calculate the rock mass integrity coefficient according to structural surface parameters, the formula is as follows:

[0168]

[0169] In the formula: Jv is the number of rock mass volume joints, unit bar / m 3 ;

[0170] 1.2: The calculation formula of Jv is as follows:

[0171]

[0172] 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;

[0173] 1.3: Calculate the BQ value according to the uniaxial compressive strength value of the rock and the integrity coefficient value of the rock mass:

[0174] ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

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

Description

technical field [0001] The present invention relates to a kind of based on BQ, RQD t Anisotropic Q anisotropy solution method, especially the present invention is based on BQ index, fracture network model and generalized RQD theory, inversion calculates RQD 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 Anisotropy, the solution method of Q anisotropy is given, and a method based on BQ and RQD is provided t The method for solving anisotropic Q anisotropy belongs to the field of solving Q anisotropy. Background technique [0002] The appearance and quality of the rock mass strongly depend on the degree of anisotropy of the rock mass, and the stability of the rock mass is determined by the quality of the rock mass. Some geological phenomena have also proved this point. For example, during the excavation process of a roadway or expressway tunnel, non-perpendicular deformation and failure ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N3/08G06T17/05G06T19/20
CPCG01N3/08G01N2203/0252G06T17/05G06T19/20
Inventor 胡高建
Owner SHAOXING UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com