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

A technology of surrounding rock stability and numerical simulation, applied in CAD numerical modeling, measuring devices, using stable tension/pressure to test material strength, etc., can solve the problem that the anisotropy calculation formula has not been obtained and the anisotropy Problems such as the solution method and the inability to reflect the anisotropy of RQD

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
[0015] 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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  • Surrounding rock stability dynamic evaluation method based on photogrammetry, BQ and numerical simulation
  • Surrounding rock stability dynamic evaluation method based on photogrammetry, BQ and numerical simulation
  • Surrounding rock stability dynamic evaluation method based on photogrammetry, BQ and numerical simulation

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Embodiment Construction

[0250] The present invention will be further described below with reference to the accompanying drawings.

[0251] refer to Figure 1 to Figure 7 , a dynamic evaluation method for surrounding rock stability based on photogrammetry, BQ, and numerical simulation, including the following steps:

[0252] 1) Rapid acquisition of structural surface digital photogrammetry, the process is as follows:

[0253] 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;

[0254] 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...

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Abstract

A surrounding rock 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) quickly obtaining structural plane digital photogrammetry; (2) conducting structural plane fuzzy equivalent clustering analysis; (3) conducting 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) solving an optimal threshold t based on BQ inversion; (7) solving an RQDt underanisotropy conditions; (8) measuring a crustal stress; (9) improving a Mathews stability graph method; (10) conducting evaluation based on the improved Mathews stability diagram; (11) dynamically analysing the surrounding rock stability; and (12) dynamically evaluating the goaf stability. The goaf surrounding rock stability dynamic evaluation method realizes goaf surrounding rock stability dynamic evaluation based on combination of an improved Mathews stability graph method and numerical simulation. 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 method for dynamic evaluation of surrounding rock stability based on photogrammetry, BQ, and numerical simulation. In particular, the present invention is based on photogrammetry, fuzzy equivalent analysis, BQ index, fracture 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 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 numerical simulation is provided. A dynamic evaluation method for surrounding rock stability belongs to the field of goaf stability evaluation. Background technique [0002] After a long period of underground mining in metal mines, a large-scale go...

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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