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

A laser scanning, roadway technology, applied in the field of light scanning, RQD and RQDt roadway excavation, can solve the problem of not reflecting 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 laser scanning, RQD and RQDt
  • Roadway excavation adverse orientation solving method based on laser scanning, RQD and RQDt
  • Roadway excavation adverse orientation solving method based on laser scanning, RQD and RQDt

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Embodiment Construction

[0205] The present invention will be further described below with reference to the accompanying drawings.

[0206] refer to Figure 1 to Figure 5 , a laser-scanning, RQD and RQD-based t The method for solving the unfavorable azimuth of roadway excavation includes the following steps:

[0207] 1) Rapid acquisition of structural plane 3D laser scanning, the process is as follows:

[0208] 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;

[0209] 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 ba...

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Abstract

A roadway excavation unfavorable orientation solving method based on laser scanning, RQD and RQDt belongs to the field of roadway excavation orientations, and comprises the following steps: (1) quickly obtaining structural plane three-dimensional laser scanning; (2) drawing a structural surface pole diagram and an inclined rose diagram; (3) 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 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, RQD and RQD t The method for solving the unfavorable orientation of roadway excavation, especially the present invention is based on three-dimensional laser scanning, nearest neighbor propagation algorithm, RQD index, fracture network model, generalized RQD theory and conic curve equation, and inversely 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, 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 ...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06T17/00G06K9/62G06Q10/06
CPCG06F30/20G06T17/00G06Q10/06395G06T2207/10008G06T2207/10028G06F18/23
Inventor 胡高建张贺周长冰
Owner SHAOXING UNIVERSITY
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