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

A technology of photogrammetry and evaluation method, applied in the direction of applying stable tension/pressure to test material strength, measuring device, 2D image generation, etc., can solve the problem of not reflecting RQD anisotropy and not obtaining anisotropy calculation formula , have not yet obtained anisotropic solution methods 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
[0013] 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

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

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[0223]The present invention will be further described below with reference to the drawings.

[0224]ReferenceFigure 1 ~ Figure 6, An evaluation method of empty space stability based on photogrammetry, BQ, and improved Mathews stability map, including the following steps:

[0225]1) Quickly obtain digital photogrammetry of structural plane, the process is as follows:

[0226]1.1: According to the range 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 photogrammetric area, and stand the benchmark vertically on one side of the measurement area to calibrate the final generated three-dimensional image The distance between any two points;

[0227]1.2: Select an outcropping, relatively large and smooth structural surface on the surface of the rock mass as a calibration point, measure the inclination and inclination angle with a compass, and mark it for realizing the orientation of the image during post-proces...

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Abstract

A goaf 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) quickacquiring of structural plane digital photogrammetry; (2) structural plane fuzzy equivalent clustering analysis; (3) rock mass quality calculation based on 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 BQ inversion; (7) an RQDt anisotropy solving method; (8) an improved method of a Mathews stability graph method; (9) an improved Mathews stability diagram evaluation method; (10) a surrounding rock stability analysis method; and (11) a goaf stabilityevaluation method. According to the method, the optimal threshold t of the RQDt, the anisotropism solving of the RQDt and the improvement of the Mathews stability diagram method are realized, and thegoaf surrounding rock stability evaluation combining the improved Mathews stability diagram method and numerical 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 method for evaluating empty space stability based on photogrammetry, BQ, and improved Mathews stability map. In particular, the present invention is based on photogrammetry, fuzzy equivalence analysis, BQ index, fracture network model and generalized RQD theory, inversion Calculate RQDtThe range of the optimal threshold t and the optimal threshold t value give RQDtAnisotropic solution method, and based on RQDtThe improved method of Mathews stability map method and the improved evaluation method of Mathews stability map are given. Combined with the numerical simulation method, a method based on photogrammetry, BQ and improved Mathews stability map is provided. The evaluation method belongs to the field of stability evaluation of the goaf.Background technique[0002]After a long period of underground mining in metal mines, large-scale mined-out areas will be formed. The mined-out areas are interconnected, overlapped and concentrate...

Claims

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Application Information

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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
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