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RQDt optimal threshold t solving method based on photogrammetry and RQD inversion

An optimal threshold, photogrammetry technology, applied in 3D modeling, character and pattern recognition, design optimization/simulation, etc., can solve the problem of not reflecting RQD anisotropy, optimal threshold t no longer optimal, etc. question

Inactive Publication Date: 2021-03-09
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 photogrammetry and RQD inversion
  • RQDt optimal threshold t solving method based on photogrammetry and RQD inversion
  • RQDt optimal threshold t solving method based on photogrammetry and RQD inversion

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Embodiment Construction

[0144] The present invention will be further described below with reference to the accompanying drawings.

[0145] refer to Figure 1 ~ Figure 4 , an RQD based on photogrammetry and RQD inversion t The optimal threshold t solution method includes the following steps:

[0146] 1) Rapid acquisition of structural surface digital photogrammetry, the process is as follows:

[0147] 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;

[0148] 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 realize the ori...

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Abstract

The invention discloses an RQDt optimal threshold t solving method based on photogrammetry and RQD inversion, and belongs to the field of RQDt optimal threshold t solving, and the method comprises thesteps: (1) quickly obtaining structural plane digital photogrammetry; (2) drawing a structural surface pole diagram and a trend rose diagram; (3) making rock mass quality calculation based on RQD indexes; (4) generating and sectioning a rock mass three-dimensional fracture network model; (5) drawing an RQDt anisotropy diagram; and (6) arranging an optimal threshold t solving method based on RQD inversion. Photogrammetry, fuzzy equivalent clustering, an RQD theory, a fracture network model, a generalized RQD theory and inversion calculation are combined, the optimal threshold t of RQDt is solved, and the RQDt optimal threshold t solving method based on photogrammetry and RQD inversion is provided. The method is clear, the obtained threshold t can reflect the real rock mass quality, and themethod is suitable for solving the optimal threshold t of the rock mass RQDt.

Description

technical field [0001] The present invention relates to a RQD based on photogrammetry and RQD inversion t The optimal threshold t solution method, especially the present invention is based on photogrammetry, fuzzy equivalent clustering, RQD index, crack network model and generalized RQD theory, and calculates RQD by inversion t The range of optimal threshold t and the optimal threshold t value, providing an RQD based on photogrammetry and RQD 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 threshold value of 100 mm is r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06T17/00G06K9/62G06Q10/06
CPCG06F30/20G06T17/00G06Q10/06395G06T2207/10004G06F18/23
Inventor 胡高建
Owner SHAOXING UNIVERSITY
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