RQDt optimal threshold t solving method based on three-dimensional laser scanning and BQ inversion

An optimal threshold and three-dimensional laser technology, applied in 3D modeling, geometric CAD, and optical devices, can solve the problems that the optimal threshold t is no longer optimal and 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
The research on the optimal threshold t in these two aspects has certain limitations in the applicable conditions. It is a method of solving the optimal threshold t in a specific theory and background. When the background or model changes, the optimal The threshold t will no longer be optimal

Method used

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  • RQDt optimal threshold t solving method based on three-dimensional laser scanning and BQ inversion
  • RQDt optimal threshold t solving method based on three-dimensional laser scanning and BQ inversion
  • RQDt optimal threshold t solving method based on three-dimensional laser scanning and BQ inversion

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Embodiment Construction

[0183] The present invention will be further described below with reference to the accompanying drawings.

[0184] refer to Figure 1 to Figure 4 , a RQD based on 3D laser scanning and BQ inversion t The optimal threshold t solution method includes the following steps:

[0185] 1) Rapid acquisition of structural plane 3D laser scanning, the process is as follows:

[0186] 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;

[0187] 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, and set the...

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Abstract

The invention discloses an RQDt optimal threshold t solving method based on three-dimensional laser scanning and BQ inversion, and belongs to the field of RQDt optimal threshold t solving, which comprises the following steps: (1) quickly obtaining three-dimensional laser scanning of a structural plane; (2) drawing a structural surface pole diagram and an inclined rose diagram; (3) performing rockmass 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; and (6) performing an optimalthreshold t solving method based on BQ inversion. According to the invention, three-dimensional laser scanning, an affinity propagation algorithm, a BQ theory, a fracture network model, a generalizedRQD theory and inversion calculation are combined, the optimal threshold t of RQDt is solved, and the RQDt optimal threshold t solving method based on three-dimensional laser scanning and BQ inversionis provided. The method is clear, the obtained threshold t can reflect the real rock mass quality, and the method is suitable for solving the optimal threshold t of the rock mass RQDt.

Description

technical field [0001] The invention relates to a RQD based on three-dimensional laser scanning and BQ inversion t The optimal threshold t solution method, especially the present invention is based on three-dimensional laser scanning, nearest neighbor propagation algorithm, BQ index, crack network model and generalized RQD theory, inversion calculates RQD t The range of optimal threshold t and the optimal threshold t value, providing a RQD based on 3D laser scanning and BQ inversion t Optimal threshold t solution method, belonging to RQD t The optimal threshold t for solving the 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 borehole RQD in 1964. Due to the following two shortcomings in the application of borehole RQD: whether the...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06K9/62G06F30/20G06F30/13G06F7/58G01B11/24G06T11/20G06T17/00
CPCG06Q10/06393G06Q10/06395G06F30/20G06T17/00G06F7/588G06T11/203G06T11/206G06F30/13G01B11/24G06F18/23213
Inventor 胡高建刘杰周长冰
Owner SHAOXING UNIVERSITY
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