RQDt anisotropy solving method based on photogrammetry, BQ and optimal threshold

An optimal threshold and anisotropy technology, applied in measurement devices, 3D modeling, photo interpretation, etc., can solve the problem of RQD anisotropy that cannot be reflected, RQD anisotropy solution method has not been obtained, and RQD anisotropy has not been obtained. Problems such as anisotropy calculation formula

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
[0010] 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 yet given a calculation method for the optimal threshold t, so the calculation formula of RQD anisotropy based on the optimal threshold t has not been obtained, and the RQD parameters that can best reflect the quality of the rock mass have not yet been obtained. Anisotropic solution method

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  • RQDt anisotropy solving method based on photogrammetry, BQ and optimal threshold
  • RQDt anisotropy solving method based on photogrammetry, BQ and optimal threshold
  • RQDt anisotropy solving method based on photogrammetry, BQ and optimal threshold

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[0192] The present invention will be further described below with reference to the accompanying drawings.

[0193] refer to Figure 1 to Figure 5 , an RQD based on photogrammetry, BQ and optimal thresholding t An anisotropic solution method, including the following steps:

[0194] 1) Rapid acquisition of structural surface digital photogrammetry, the process is as follows:

[0195] 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;

[0196] 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 th...

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Abstract

An RQDt anisotropy solving method based on photogrammetry, BQ and an optimal threshold belongs to the field of RQDt anisotropy solving, and comprises the following steps: (1) quickly acquiring structural plane digital photogrammetry; (2) drawing a structural surface pole diagram and a trend 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 an RQDt anisotropy solving method. Photogrammetry, fuzzy equivalence analysis, a BQ theory, a fracture network model, a generalized RQD theory and inversion calculation are combined, the optimal threshold t and anisotropism of RQDt are solved, and the RQDt anisotropism solving method based on photogrammetry, BQ and the optimal threshold is provided. The method is clear, and is suitable for anisotropic solution of rock mass RQDt.

Description

technical field [0001] The present invention relates to a RQD based on photogrammetry, BQ and optimal threshold t Anisotropy solution method, especially the present invention is based on photogrammetry, fuzzy equivalence analysis, 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, gives the RQD t Anisotropic solution method, providing a RQD based on photogrammetry, BQ and optimal thresholding t Anisotropic solution method, belonging to RQD t Anisotropic solution field. Background technique [0002] In nature, anisotropy is ubiquitous. Rock masses exhibit very pronounced anisotropy, with properties that vary with viewing angle and measurement direction. The origin of rock anisotropy changes can be attributed to geological origin, such as unique bedding in sedimentary rocks, unique natural pores in basalt, gneiss structure in gneiss and cleavage in slate, and through thes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06K9/62G06F30/20G06F30/13G06F7/58G01N21/84G01C11/04G06T11/20G06T17/00
CPCG06Q10/06393G06Q10/06395G06F30/20G06T17/00G06F7/588G06T11/203G06T11/206G06F30/13G01C11/04G01N21/84G06F18/23G06F18/22
Inventor 胡高建
Owner SHAOXING UNIVERSITY
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