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Space RQDt solving method based on laser scanning and BQ inversion of optimal threshold t

An optimal threshold and laser scanning technology, applied in 3D modeling, geometric CAD, drawing from basic elements, etc., can solve problems that cannot reflect RQD anisotropy

Inactive Publication Date: 2020-12-25
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
[0008] 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

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  • Space RQDt solving method based on laser scanning and BQ inversion of optimal threshold t
  • Space RQDt solving method based on laser scanning and BQ inversion of optimal threshold t
  • Space RQDt solving method based on laser scanning and BQ inversion of optimal threshold t

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Embodiment Construction

[0201] The present invention will be further described below with reference to the accompanying drawings.

[0202] refer to Figure 1 to Figure 5 , a spatial RQD based on laser scanning and BQ inversion with an optimal threshold t t The solution method includes the following steps:

[0203] 1) Rapid acquisition of structural plane 3D laser scanning, the process is as follows:

[0204] 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 space point cloud information of the slope rock mass according to a certain scanning route, and at the same time, it is necessary to ensure the tripod table as much as possible. level, and place control targets;

[0205] 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 th...

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Abstract

A space RQDt solving method based on laser scanning and BQ inversion optimal threshold t belongs to the field of RQDt anisotropism solving, and comprises the following steps: (1) quickly acquiring structural surface three-dimensional laser scanning; (2) drawing a structural surface pole diagram and an inclined rose diagram; (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; and (7)performing a space RQDt solving method. According to the invention, three-dimensional laser scanning, an affinity propagation algorithm, a BQ theory, a fracture network model, a generalized RQD theoryand a conic curve equation are combined, and optimal threshold t solution of RQDt and drawing of an RQDt elliptic curve and an anisotropic ellipsoid under the optimal threshold t are achieved. The method is clear, the obtained optimal threshold t, elliptic curve and anisotropic ellipsoid can reflect the RQDt anisotropic characteristics of the real rock mass, and the method is suitable for solvingthe spatial anisotropy of the rock mass RQDt.

Description

technical field [0001] The invention relates to a spatial RQD based on laser scanning and BQ inversion optimal threshold t t The solution method, especially the present invention is based on three-dimensional laser scanning, nearest neighbor propagation algorithm, BQ index, crack network model, generalized RQD theory and conic curve equation, inversion calculates RQD t The range of the optimal threshold t and the value of the optimal threshold t get the RQD under the optimal threshold t t Elliptic curves and anisotropic ellipsoids, providing a spatial RQD based on laser scanning and BQ inversion with an optimal threshold t t Solving method, belonging to RQD t Anisotropic solution field. Background technique [0002] In nature, RQD is an important index to characterize the quality of rock mass, and RQD has anisotropy. The anisotropy of RQD can also be seen from the expansion of the calculation formula from borehole RQD to generalized RQD. Deer proposed the concept of bor...

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Application Information

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IPC IPC(8): G06Q10/06G06K9/62G06F30/20G06F30/13G06F7/58G06T11/20G06T17/00
CPCG06Q10/06393G06Q10/06395G06F30/20G06T17/00G06F7/588G06T11/203G06T11/206G06F30/13G06F18/23213
Inventor 胡高建刘杰周长冰
Owner SHAOXING UNIVERSITY
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