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Goaf stability dynamic evaluation method based on photogrammetry, BQ and numerical simulation

A technology of numerical simulation and photogrammetry, applied in CAD numerical modeling, measuring devices, and testing the strength of materials by applying stable tension/pressure. , has not yet obtained anisotropy solution method and other problems

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
[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

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  • Goaf stability dynamic evaluation method based on photogrammetry, BQ and numerical simulation
  • Goaf stability dynamic evaluation method based on photogrammetry, BQ and numerical simulation
  • Goaf stability dynamic evaluation method based on photogrammetry, BQ and numerical simulation

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Embodiment Construction

[0229] The present invention will be further described below with reference to the accompanying drawings.

[0230] refer to Figure 1 to Figure 6 , a dynamic evaluation method for void stability based on photogrammetry, BQ, and numerical simulation, including the following steps:

[0231] 1) Rapid acquisition of structural surface digital photogrammetry, the process is as follows:

[0232] 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;

[0233] 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 is used to rea...

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Abstract

A goaf stability dynamic evaluation method based on photogrammetry, BQ and numerical simulation belongs to the field of goaf stability evaluation, and comprises the following steps: (1) quick obtaining 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 rockmass 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) animproved method of a Mathews stability graph method; (9) an improved Mathews stability diagram evaluation method; (10) a surrounding rock stability dynamic analysis method; and (11) a goaf stabilitydynamic evaluation method. According to the method, solving of RQDt anisotropism and improvement of a Mathews stability diagram method are achieved, and goaf surrounding rock stability dynamic evaluation combining the improved Mathews stability diagram method and numerical simulation is achieved. The method is clear, and is suitable for dynamic evaluation of goaf surrounding rock stability.

Description

technical field [0001] The present invention relates to a dynamic evaluation method of airspace stability based on photogrammetry, BQ, and numerical simulation. In particular, the present invention is based on photogrammetry, fuzzy equivalent analysis, BQ index, crack network model, and generalized RQD theory. out 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 of the Mathews stability map method and the improved Mathews stability map evaluation method are given, and combined with the numerical simulation method, a dynamic evaluation of the void stability based on photogrammetry, BQ, and numerical simulation is provided. The method belongs to the field of goaf stability evaluation. Background technique [0002] After a long period of underground mining in metal mines, a large-scale goaf group will be formed. The goaf group is connected, overlapped and concentrated unde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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