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Quantitative description method for rock integrity

A quantitative description and integrity technology, applied in the quantitative description of slope fissures and joints, in the field of rock mass integrity, it can solve the problem of inability to measure quantitative indicators, and achieve the effect of avoiding sampling errors.

Inactive Publication Date: 2017-05-31
POWERCHINA CHENGDU ENG
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Problems solved by technology

[0004] In order to overcome the shortcomings that the existing descriptions of rock mass integrity are mostly qualitative evaluations, and quantitative indicators cannot be measured, the technical problem to be solved by the present invention is to provide a method that can quantitatively describe the integrity of rock mass

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  • Quantitative description method for rock integrity
  • Quantitative description method for rock integrity

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing.

[0024] A quantitative description method for rock mass integrity, including the following steps:

[0025] a. Obtain sketches of joints and fissures in the rock body through geological records;

[0026] B. Convert the rock mass structure sketch obtained in step a into a graphic file in digital format;

[0027] c. Use the box covering method to cover the cracks in the graphics file, and the side length of the box is δ i , corresponding to the number of boxes required for this size is N i ;

[0028] d. According to fractal theory, the length of cracks in rock mass can be approximately expressed as: L(δ i ) = L 0 δ i 1-D , where:

[0029] δ i --Override the side length size of the desired box;

[0030] D--fractal dimension;

[0031] L(δ i )--approximate length of rock mass fissure;

[0032] L 0 --constant;

[0033] According to step c, the rock mass fissure lengt...

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Abstract

The invention discloses a quantitative description method for rock integrity, and relates to the fields of engineering geology and rock mechanics. The method comprises the following steps: acquiring a sketch map of an endokinetic joint gap of a rock body through geological logging; converting the rock structure sketch map acquired in the step a into a graphic file in a digital format; covering the gap in the graphic file by using a box covering method, and acquiring the relationship between the fractal dimension of the rock body and the size and amount of box covering in combination with a fractal theory to obtain a fractional dimension of the rock body. The quantitative description method has the beneficial effects that the sketch map of the endokinetic joint gap of the rock body is converted to the digital format, and then the fractional dimension of the rock body is calculated by the box covering method and the fractal theory. Compared with field wave speed testing, the method has the advantages that sampling error can be avoided, the obtained fractional dimension is a quantitative index, a basis is laid for a corresponding relationship curve of the fractional dimension, rock integrity, rock strength and deformation through the fractional dimension, and the strength index of the rock body can be predicted.

Description

technical field [0001] The invention relates to the fields of engineering geology and rock mechanics, in particular to a method for quantitatively describing rock mass integrity and slope fissure joints in hydropower projects. Background technique [0002] For hydropower projects, it is important to classify rock mass quality and provide physical and mechanical parameters of rock mass with different rock mass qualities. At present, the commonly used quantitative indicators for fractured rock mass are rock mass quality classification, rock mass integrity coefficient and Barton joint roughness coefficient. These two indicators are mainly used in the qualitative evaluation of rock mass and the shear strength of fractured rock mass. Estimation, however, whether it is rock mass quality classification or joint roughness coefficient, the quantification of its indicators is based on qualitative basis, and no specific quantitative description can be given. [0003] For example, the ...

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Application Information

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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 赵小平张世殊冉从彦甘东科苏红杰宋书志郑晓晶陈龙
Owner POWERCHINA CHENGDU ENG
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