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Roadway excavation adverse orientation solving method based on photogrammetry, RQD and RQDt

A technology of photogrammetry and roadway, which is applied in the field of solving unfavorable azimuths of roadway excavation based on photogrammetry, RQD and RQDt, and can solve problems that cannot reflect the anisotropy of RQD

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
[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

Method used

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  • Roadway excavation adverse orientation solving method based on photogrammetry, RQD and RQDt
  • Roadway excavation adverse orientation solving method based on photogrammetry, RQD and RQDt
  • Roadway excavation adverse orientation solving method based on photogrammetry, RQD and RQDt

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Embodiment Construction

[0196] The present invention will be further described below with reference to the accompanying drawings.

[0197] refer to Figure 1 to Figure 5 , a method based on photogrammetry, RQD and RQD t The method for solving the unfavorable azimuth of roadway excavation includes the following steps:

[0198] 1) Rapid acquisition of structural surface digital photogrammetry, the process is as follows:

[0199] 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;

[0200] 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...

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Abstract

A roadway excavation unfavorable orientation solving method based on photogrammetry, RQD and RQDt belongs to the field of roadway excavation orientations, and comprises the following steps: (1) rapidly 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; (6) arranging an optimal threshold t solving method based on RQD inversion; (7) arranging a space RQDt solving method; and (8) arranging a roadway excavation unfavorable orientation solving method. The optimal threshold t of the RQDt is solved, the RQDt elliptic curve and the anisotropicellipsoid are drawn, and the roadway excavation unfavorable orientation under the optimal threshold t is solved. The method is clear, the obtained optimal threshold t, elliptic curve and anisotropicellipsoid can accurately reflect the RQDt anisotropic characteristics of the rock mass, and the obtained roadway excavation adverse orientation can be used for guiding roadway excavation constructionapplication.

Description

technical field [0001] The present invention relates to a method based on photogrammetry, RQD and RQD t The method for solving the unfavorable orientation of roadway excavation, especially the present invention is based on photogrammetry, fuzzy equivalent clustering, RQD index, fracture network model, generalized RQD theory and conic curve equation, and calculates RQD by inversion 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, together with unfavorable azimuths for roadway excavation at an optimal threshold t, provide a method based on photogrammetry, RQD and RQD t The method for solving unfavorable azimuths of roadway excavation belongs to the field of roadway excavation azimuths. Background technique [0002] In nature, anisotropy is ubiquitous. Rock masses exhibit very pronounced anisotropy, with properties that vary with viewing angle and measuremen...

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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