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

A technology of surrounding rock stability and photogrammetry, applied in 2D image generation, photo interpretation, image data processing, etc. Anisotropic solution method 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
[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

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

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Embodiment Construction

[0244] The present invention will be further described below with reference to the accompanying drawings.

[0245] refer to Figure 1 to Figure 7 , a surrounding rock stability evaluation method based on photogrammetry, BQ, and improved Mathews stability diagram, including the following steps:

[0246] 1) Rapid acquisition of structural surface digital photogrammetry, the process is as follows:

[0247] 1.1: According to the scope and spatial position of the rock mass in the observation area, select the rock mass with well-developed surface joints and no obstacles as the photogrammetry area, and place the benchmark vertically on one side of the measurement area to calibrate the final generated 3D image the distance between any two points;

[0248] 1.2: Select an outcropping, relatively large area, and relatively smooth structural surface on the surface of the rock mass as a calibration point, use a compass to measure the inclination and inclination angle, and mark it, which ...

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Abstract

A surrounding rock stability evaluation method based on photogrammetry, BQ and an improved Mathews stability diagram belongs to the field of goaf stability evaluation, and comprises the following steps: (1) quickly acquiring structural plane digital photogrammetry; (2) performing structural plane fuzzy equivalent clustering analysis; (3)performing rock mass 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 a crustal stress measurement method; (9) performing an improved method of a Mathews stability graph method; (10) improving a Mathews stability diagram evaluation method; (11) performing a surrounding rock stability analysis method; and (12) performing a goaf stability evaluation method. According to the invention, improvement of a Mathews stability diagram method considering RQDt anisotropy and ground stress fitting is realized, and surrounding rock stability evaluation based on the improved Mathews stability diagram method andnumerical simulation is realized. The method is clear and suitable for goaf surrounding rock stability evaluation.

Description

technical field [0001] The present invention relates to a surrounding rock stability evaluation method based on photogrammetry, BQ, improved Mathews stability diagram, especially the present invention is based on photogrammetry, fuzzy equivalent analysis, BQ index, fracture network model and generalized RQD theory, inversion 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 The anisotropy and ground 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 method based on photogrammetry, BQ, and improved Mathews stability diagram is provided. The surrounding rock stability evaluation method shown in Fig. 1 belongs to the field of goaf stability evaluation. Background technique [0002] After a long period of underground mining in me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06K9/62G06F30/20G06F30/13G06F7/58G01C11/04G06T11/20G06T17/00G06F119/14
CPCG06Q10/06393G06Q10/06395G06F30/20G06T17/00G06F7/588G06T11/203G06T11/206G06F30/13G01C11/04G06F2119/14G06F18/23G06F18/22
Inventor 胡高建
Owner SHAOXING UNIVERSITY
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