Improved Mathews stability diagram evaluation method based on photogrammetry, BQ, RQDt and crustal stress

A technology of photogrammetry and evaluation method, applied in the direction of measuring device, 2D image generation, using stable tension/pressure test material strength, etc., can solve the problem that RQD anisotropy cannot be reflected, and anisotropy calculation formula cannot be obtained , have not yet obtained anisotropic solution methods and other issues

Inactive Publication Date: 2021-01-08
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 the local rock mass conditions, but cannot reflect the RQD anisotropy
[0012] The anisotropy of RQD directly affects the quality of th...

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  • Improved Mathews stability diagram evaluation method based on photogrammetry, BQ, RQDt and crustal stress
  • Improved Mathews stability diagram evaluation method based on photogrammetry, BQ, RQDt and crustal stress
  • Improved Mathews stability diagram evaluation method based on photogrammetry, BQ, RQDt and crustal stress

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[0219] The present invention will be further described below with reference to the accompanying drawings.

[0220] refer to Figure 1 to Figure 7 , a photogrammetry-based, BQ, RQD t , the improved Mathews stability diagram evaluation method of ground stress, comprising the following steps:

[0221] 1) Rapid acquisition of structural surface digital photogrammetry, the process is as follows:

[0222] 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;

[0223] 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 ...

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Abstract

The invention discloses an improved Mathews stability diagram evaluation method based on photogrammetry, BQ, RQDt and crustal stress, and belongs to the field of Mathews stability diagram evaluation methods, and the method comprises the following steps: (1) quickly obtaining structural plane digital photogrammetry; (2) conducting structural plane fuzzy equivalent clustering analysis; (3) conducting 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) solving an optimalthreshold t based on BQ inversion; (7) solving an RQDt under anisotropy conditions; (8) measuring a crustal stress; (9) improving a Mathews stability graph method; and (10) conducting evaluation basedon an improved Mathews stability diagram. According to the method, photogrammetry, fuzzy equivalence analysis, a BQ theory, a fracture network model, a generalized RQD theory and a crustal stress measurement method are combined, and improved Mathews stability diagram method mine room stability evaluation considering RQDt anisotropy and crustal stress fitting is achieved. The method is clear and suitable for evaluating the stability of the mine room surrounding rock.

Description

technical field [0001] The invention relates to a photogrammetric, BQ, RQD based t , the improved Mathews stability map evaluation method of ground stress, especially the present invention is based on photogrammetry, fuzzy equivalence analysis, BQ index, fracture network model, generalized RQD theory and ground stress measurement method, and inversely calculates RQD t The range of optimal threshold t and the optimal threshold t value, gives the RQD t Anisotropic solution method, and based on RQD t The fitting method of anisotropy and ground stress, gives an improved method of Mathews stability map method, and provides a method based on photogrammetry, BQ, RQD t 1. The improved Mathews stability diagram evaluation method of ground stress belongs to the field of Mathews stability diagram evaluation method. Background technique [0002] The Mathews stability diagram method is a kind of analysis method for the stability of the surrounding rock of the mine. It is a stability d...

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Application Information

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IPC IPC(8): G06Q10/06G01B11/25G01N3/08G06F7/58G06F30/13G06F30/20G06K9/62G06T11/20G06T17/00G06F119/14G06F111/10
CPCG06Q10/06393G06Q10/06395G06F30/20G06T17/00G06F7/588G06T11/203G06T11/206G06F30/13G01N3/08G01B11/2518G01N2203/0252G01N2203/0647G06F2119/14G06F2111/10G06F18/22G06F18/23
Inventor 胡高建
Owner SHAOXING UNIVERSITY
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