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

Surrounding rock stability evaluation method based on laser scanning, BQ and improved Mathews stability diagram

A technology for surrounding rock stability and evaluation methods, applied in the direction of applying stable tension/compression to test material strength, generation of 2D images, strength characteristics, etc., can solve the problem that RQD anisotropy cannot be reflected, and anisotropy has not yet been obtained Problems such as the solution method and the formula for calculating anisotropy have not been obtained

Inactive Publication Date: 2021-01-08
SHAOXING UNIVERSITY
View PDF0 Cites 3 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 the local rock mass conditions, but cannot reflect the RQD anisotropy
[0014] 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

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
  • Surrounding rock stability evaluation method based on laser scanning, BQ and improved Mathews stability diagram
  • Surrounding rock stability evaluation method based on laser scanning, BQ and improved Mathews stability diagram
  • Surrounding rock stability evaluation method based on laser scanning, BQ and improved Mathews stability diagram

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0253] The present invention will be further described below with reference to the accompanying drawings.

[0254] refer to Figure 1 to Figure 7 , a surrounding rock stability evaluation method based on laser scanning, BQ, and improved Mathews stability diagram, including the following steps:

[0255] 1) Rapid acquisition of structural plane 3D laser scanning, the process is as follows:

[0256] 1.1: According to the scanning target and site conditions, select the location of the scanning machine and set up a tripod. During the erection, it is necessary to ensure that the instrument can completely obtain the three-dimensional point cloud information of the slope rock mass according to a certain scanning route, and at the same time, the tripod table should be ensured as much as possible. level, and place control targets;

[0257] 1.2: Place the scanner host on the tripod table, fix the knob, center the bubble of the host by coarsely adjusting the tripod and fine-tuning the s...

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

The invention discloses a surrounding rock stability evaluation method based on laser scanning, BQ and an improved Mathews stability diagram, and belongs to the field of goaf stability evaluation, andthe method comprises the following steps: (1) quick obtaining of structural surface three-dimensional laser scanning; (2) structural plane clustering analysis; (3) rock mass quality calculation basedon a BQ index; (4) generating and sectioning of a rock mass three-dimensional fracture network model; (5) drawing of an RQDt anisotropy diagram; (6) an optimal threshold t solving method based on BQinversion; (7) an RQDt anisotropy solving method; (8) a crustal stress measurement method; (9) an improved method of a Mathews stability graph method; (10) an improved Mathews stability diagram evaluation method; (11) a surrounding rock stability analysis method; and (12) a goaf stability evaluation method. According to the method, improvement of a Mathews stability diagram method considering RQDtanisotropy and ground stress fitting is realized, and surrounding rock stability evaluation based on the improved Mathews stability diagram method and numerical simulation is realized. The method isclear and suitable for goaf surrounding rock stability evaluation.

Description

technical field [0001] The present invention relates to a method for evaluating the stability of surrounding rock based on laser scanning, BQ, and improved Mathews stability diagram, especially the present invention is based on three-dimensional laser scanning, neighbor propagation algorithm, BQ index, fracture network model, generalized RQD theory and ground stress Measurement method, inversion to calculate 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 and in-situ stress fitting method, the improved method of the Mathews stability diagram method and the improved Mathews stability diagram evaluation method are given, combined with the numerical simulation method, a laser scanning, BQ, improved Mathews stability diagram method is provided The surrounding rock stability evaluation method shown in Fig. 1 belongs to the field of goaf stability evaluation. Background technique...

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): G06Q10/06G01B11/25G01N3/08G06F7/58G06F30/13G06F30/20G06K9/62G06T11/20G06T17/00G06F119/14G06F111/10
CPCG06Q10/06393G06Q10/06395G06F30/20G06T17/00G06F7/588G06T11/203G06T11/206G06F30/13G01N3/08G01B11/2518G01N2203/0252G01N2203/0647G06F2119/14G06F2111/10G06F18/22G06F18/23
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