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Improved Mathews stability diagram evaluation method based on laser scanning, BQ, RQDt and crustal stress

A technology of laser scanning and evaluation method, applied in 2D image generation, 3D modeling, geometric CAD, etc., can solve the problem that the anisotropy calculation formula cannot be obtained, the RQD anisotropy cannot be reflected, and the anisotropy solution has not yet been obtained Methods and other issues

Inactive Publication Date: 2020-12-29
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
[0012] 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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  • Improved Mathews stability diagram evaluation method based on laser scanning, BQ, RQDt and crustal stress
  • Improved Mathews stability diagram evaluation method based on laser scanning, BQ, RQDt and crustal stress
  • Improved Mathews stability diagram evaluation method based on laser scanning, BQ, RQDt and crustal stress

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Embodiment Construction

[0228] The present invention will be further described below with reference to the accompanying drawings.

[0229] refer to Figure 1 to Figure 7 , a laser-scanning, BQ, RQD-based t , the improved Mathews stability diagram evaluation method of ground stress, comprising the following steps:

[0230] 1) Rapid acquisition of structural plane 3D laser scanning, the process is as follows:

[0231] 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;

[0232] 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 scan...

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Abstract

The invention discloses an improved Mathews stability diagram evaluation method based on laser scanning, BQ and RQDt anisotropy, and belongs to the field of Mathews stability diagram evaluation methods, and the method comprises the following steps: (1) quickly obtaining three-dimensional laser scanning of a structural plane; (2) performing structural plane clustering analysis; (3) performing rockmass quality calculation based on a BQ index; (4) generating and sectioning a rock mass three-dimensional fracture network model; (5) drawing an RQDt anisotropy diagram; (6) performing an optimal threshold t solving method based on BQ inversion; (7) performing an RQDt anisotropy solving method; (8) performing an improved method of a Mathews stability graph method; and (9) improving a Mathews stability diagram evaluation method. According to the invention, three-dimensional laser scanning, structural plane clustering analysis, a BQ theory, a fracture network model and a generalized RQD theory are combined, and improved Mathews stability diagram method mine room stability evaluation considering RQDt anisotropism is achieved. The method is clear and suitable for evaluating the stability of the mine room surrounding rock.

Description

technical field [0001] The invention relates to a method based on laser scanning, BQ, RQD t 1. The improved Mathews stability map evaluation method of ground stress, 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, and inversely 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 The fitting method of anisotropy and ground stress, gives an improved method of Mathews stability map method, and provides a method based on laser scanning, BQ, RQD t 1. The improved Mathews stability diagram evaluation method of ground stress belongs to the field of Mathews stability diagram evaluation method. Background technique [0002] The Mathews stability diagram method is a kind of analysis method for the stability of the surrounding rock ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06K9/62G06F30/20G06F30/13G06F7/58G06T11/20G06T17/00
CPCG06Q10/06393G06Q10/06395G06F30/20G06T17/00G06F7/588G06T11/203G06T11/206G06F30/13G06F18/22G06F18/23213
Inventor 胡高建
Owner SHAOXING UNIVERSITY
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