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Method and device for identifying tensile shear fracture of hard rock based on acoustic emission

A recognition method and acoustic emission technology, applied in character and pattern recognition, machine learning, instruments, etc., can solve problems such as difficulties in identifying hard rock tension-shear fractures, and achieve inconvenience and low economy, avoiding time and cost Unnecessary waste, the effect of improving adaptability

Active Publication Date: 2022-06-21
GUANGXI UNIV
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  • Description
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  • Application Information

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Problems solved by technology

[0012] Aiming at the problem that traditional methods are difficult to identify hard rock tension-shear fractures, the present invention proposes a hard rock tension-shear fracture identification method based on acoustic emission, which specifically includes the following steps:

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  • Method and device for identifying tensile shear fracture of hard rock based on acoustic emission
  • Method and device for identifying tensile shear fracture of hard rock based on acoustic emission
  • Method and device for identifying tensile shear fracture of hard rock based on acoustic emission

Examples

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Embodiment example 1

[0127] A method for identifying tensile shear fractures of hard rock based on acoustic emission characteristics, such as figure 1 shown. It specifically includes the following steps:

[0128] Compression-shear-sliding hard rock in a karst area, the shape of the hard rock is approximately trapezoid, and the hard rock has been determined to be homogeneous lithology, with a size of 50,000 m 3 , the height is 20m, and the position of the hard rock main control structure surface is located at an angle of 30 degrees to the hard rock boundary, such as figure 2 shown.

[0129] In step S1, the measured geometrical and physical parameters of the hard rock are shown in Table 1.

[0130] Table 1 Hard rock mechanical parameters

[0131]

[0132] In step S2, the rock samples on the hard rock are selected for processing, and the tensile fracture test and the shear fracture test are carried out. image 3 , to obtain typical tensile rupture AE signals and shear rupture AE signals.

...

Embodiment 2

[0152] A device for identifying tensile shear fracture of hard rock based on acoustic emission characteristics, such as Figure 4 , 5 , 6, where Figure 4 , 5 It is the structure diagram of each module unit of the device, Image 6 A site layout drawing of an engineering example of the device. include:

[0153] The information module Z1 is used to measure the initial parameters of deterministic hard rock. The information module Z1 is placed on the hard rock. This module Z1 can block important field measured parameters of the hard rock: the shape and size of the hard rock, the geometric size of the hard rock structure surface and other parameters.

[0154] The tension-shear sampling module Z2 is used to mine rock samples for tension test, and to carry out tension test, to obtain acoustic emission signals when tension rupture occurs, to mine rock samples for shear test, and to carry out shearing Experiment to obtain the acoustic emission signal during shear rupture. It inc...

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Abstract

The invention discloses a method and device for identifying tensile-shear fractures of hard rock based on acoustic emission, which mainly solves the problem of difficult identification of tensile-shear fractures of hard rocks in karst areas. It includes the following steps: Step S1: measure the geometrical physical parameters of the hard rock; step S2: obtain the acoustic emission signals of the rock sample tension fracture and shear fracture; step S3: extract the HOG features of the tension and shear acoustic emission patterns ; Step S4: Construct the training sample set with the HOG feature of the voiceprint image to train the IVM; Step S5: Obtain the hard rock fracture acoustic emission signal to be identified; Step S6: Bring the HOG feature of the acoustic emission voiceprint to be identified into the trained IVM to determine Hard rock fracture type; Step S7: Add the predicted samples with good recognition results to the new training set of the IVM to retrain the IVM, and predict the acoustic emission signals obtained after monitoring. The invention is applicable to the identification of tensile-shear fractures of hard rocks in karst areas from the micro scale to the macro scale.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering disaster prevention, and relates to an acoustic emission-based method and device for identifying tensile-shear rupture of hard rock. Background technique [0002] More than two-thirds of my country's territory is mountainous, and natural disasters such as rockfall, rockfall, etc. are prone to occur in mountainous areas. Due to the large-scale destructiveness of disasters such as dangerous rocks, it is easy to cause huge loss of life and property, but it is still difficult to accurately predict due to the suddenness and rapidity of natural disasters such as dangerous rocks. Therefore, how to scientifically and effectively identify hard rocks, reveal the mechanical mechanism of perilous rock disasters, and predict the path of perilous rock failure has become a hot research direction at present. [0003] The research shows that the macroscopic failure of hard rock starts from the sm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/62G06K9/00G06V10/50G06N20/00G06F17/18G06F17/14
CPCG06N20/00G06F17/18G06F17/142G06V10/50G06V10/56G06F2218/08G06F18/2415
Inventor 苏国韶黄杰蒋剑青许华杰张研罗丹旎粟明杰蓝兰
Owner GUANGXI UNIV
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