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Roadway excavation unfavorable orientation solving method based on laser scanning, BQ and RQDt

A technology of laser scanning and roadway, which is applied in the generation of 2D images, 3D modeling, and interpretation of photos, etc. It can solve the problems that RQD anisotropy cannot be reflected

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

Method used

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  • Roadway excavation unfavorable orientation solving method based on laser scanning, BQ and RQDt
  • Roadway excavation unfavorable orientation solving method based on laser scanning, BQ and RQDt
  • Roadway excavation unfavorable orientation solving method based on laser scanning, BQ and RQDt

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Embodiment Construction

[0222] The present invention will be further described below with reference to the accompanying drawings.

[0223] refer to Figure 1 to Figure 5 , a laser-scanning, BQ and RQD-based t The method for solving the unfavorable azimuth of roadway excavation includes the following steps:

[0224] 1) Rapid acquisition of structural plane 3D laser scanning, the process is as follows:

[0225] 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;

[0226] 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 bas...

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Abstract

The invention relates to a roadway excavation unfavorable orientation solving method based on laser scanning, BQ and RQDt, and belongs to the field of roadway excavation orientations, and the method 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 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) providing an optimal threshold t solving method based on BQ inversion; (7) performing a space RQDt solving method; and (8) performing a roadway excavation unfavorable orientation solving method. According to the invention,the optimal threshold t of the RQDt is solved, the RQDt elliptic curve and the anisotropic ellipsoid 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 anisotropic ellipsoid 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 construction application.

Description

technical field [0001] The present invention relates to a method based on laser scanning, BQ and RQD t The unfavorable azimuth solution method of roadway excavation, especially the present invention is based on three-dimensional laser scanning, neighbor propagation algorithm, BQ index, fracture 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 curve and anisotropic ellipsoid, get the unfavorable orientation of roadway excavation under the optimal threshold t, and provide a method based on laser scanning, BQ 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 measurem...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06T11/20G06T17/00G06K9/62G06F30/20G06F30/13G06F7/58G01C11/06
CPCG06Q10/06393G06Q10/06395G06F30/20G06T17/00G06F7/588G06T11/203G06T11/206G06F30/13G01C11/06G06F18/23213
Inventor 胡高建刘杰周长冰
Owner SHAOXING UNIVERSITY
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