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

A technology of numerical simulation and laser scanning, applied in CAD numerical modeling, testing material strength using stable tension/pressure, 3D modeling, etc. method, cannot reflect RQD anisotropy, etc.

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

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Embodiment Construction

[0238] The present invention will be further described below with reference to the accompanying drawings.

[0239] refer to Figure 1 to Figure 6 , a dynamic evaluation method for void stability based on laser scanning, BQ, and numerical simulation, including the following steps:

[0240] 1) Rapid acquisition of structural plane 3D laser scanning, the process is as follows:

[0241] 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;

[0242] 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 scanner base, a...

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Abstract

A goaf stability dynamic evaluation method based on laser scanning, BQ and numerical simulation belongs to the field of goaf stability evaluation, and comprises the following steps: (1) quick acquiring of structural surface three-dimensional laser scanning; (2) structural plane clustering analysis; (3) rock mass quality calculation based on a BQ index; (4) generating and sectioning of a rock massthree-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 dynamic analysis method; and (11) a goaf stability dynamic evaluation 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 the goaf surrounding rock stability dynamic evaluation combining the improved Mathews stability diagram method and the numerical simulation is realized. The method is clear and 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 laser scanning, BQ, and numerical simulation. In particular, the present invention is based on three-dimensional laser scanning, nearest neighbor propagation algorithm, BQ index, crack network model and generalized RQD theory, inversion calculation 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 diagram method and the improved Mathews stability diagram evaluation method are given, and combined with the numerical simulation method, a dynamic evaluation of the void stability based on laser scanning, 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. Th...

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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