Method and apparatus for determining development degree of rock cracks
A technology of degree of development and cracks, applied in measuring devices, using stable tension/pressure to test the strength and strength characteristics of materials, etc., can solve the problem that the development trend and rupture degree of macroscopic cracks cannot be accurately and quantitatively described.
Active Publication Date: 2017-05-24
UNIV OF SCI & TECH BEIJING
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[0003] The technical problem to be solved by the present invention is to provide a method and device for determining the development degree of rock cracks, so as to solve the problems existing in the prior art that cannot accurately and quantitatively describe the development trend and rupture degree of macroscopic cracks
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Embodiment 1
[0062] see figure 1 As shown, a method for determining the degree of development of rock cracks provided by the embodiments of the present invention includes:
[0063] S101, constructing a particle flow model of the rock sample;
[0064] S102, according to the constructed particle flow model, obtain the micro-crack set and the coordinate value of each micro-crack point in the micro-crack set during the destruction process of the particle flow model;
[0065] S103. According to the obtained set of micro-cracks and the coordinate value of each micro-crack point in the set of micro-cracks, perform clustering based on the density of the micro-crack points, and cluster the micro-cracks according to the distance between each cluster center. The microcrack points are grouped to obtain multiple microcrack groups;
[0066] S104, using the principal component analysis method to analyze the axial extension direction and lateral expansion direction of each micro-crack group, and quantif...
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Abstract
The invention provides a method and an apparatus for determining the development degree of rock cracks. The development degree of all micro-crack groups in an axial extension direction and in a transverse expansion direction is quantified. The method comprises the following steps: constructing a grain flow model of a rock sample; acquiring a micro-crack set in the destroy process of the grain flow model and the coordinate value of every micro-crack point in the micro-crack set according to the constructed grain flow model; carrying out clustering based on the density of the micro-crack points according to the obtained micro-crack set and the coordinate value of every micro-crack point in the micro-crack set, and grouping the micro-crack points in the micro-crack set according to the distance of every clustering center to obtain multiple micro-crack groups; and analyzing the axial extension direction and the transverse expansion direction of every micro-crack group by adopting a main component analysis technology, and quantifying the development degree of every micro-crack group in the axial extension direction and in the transverse expansion direction. The method and the apparatus are suitable for the technical fields of rock soil test and engineering.
Description
technical field [0001] The invention relates to the field of research on the mechanical properties of geotechnical engineering materials, in particular to a method and a device for determining the development degree of rock cracks. Background technique [0002] In recent years, there have been many studies on the failure tests of prefabricated rock samples to explore the development trend of cracks in the process of rock fracture in the presence of cracks. However, since the micro-cracks are difficult to observe with the naked eye, most of the research has obtained information such as the mechanical parameters of the rock and the development trend of the macro-cracks, so the research on the micro-mechanism is generally insufficient. At the same time, there are also related studies that combine numerical simulation software, especially discrete element software, to simulate traditional experiments to reveal the mesoscopic mechanism in the rock fracture process. As a powerful...
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IPC IPC(8): G01N33/24G01N3/08
CPCG01N3/08G01N33/24G01N2203/0003G01N2203/0019G01N2203/0066
Inventor 刘冰周喻王雪吴顺川周建新
Owner UNIV OF SCI & TECH BEIJING