Rock acoustic emission parameter determination method and system based on moment tensor analysis

A technology of parameter determination and acoustic emission, which is applied to the analysis of materials, the use of acoustic emission technology for material analysis, and the use of acoustic/ultrasonic/infrasonic waves for material analysis.

Pending Publication Date: 2021-11-12
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the source location and the number of microcracks contained in a single AE event cannot be determined using the moment tensor analysis method

Method used

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  • Rock acoustic emission parameter determination method and system based on moment tensor analysis
  • Rock acoustic emission parameter determination method and system based on moment tensor analysis
  • Rock acoustic emission parameter determination method and system based on moment tensor analysis

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Embodiment Construction

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0056] The purpose of the present invention is to provide a rock acoustic emission parameter determination method and system based on moment tensor analysis, which can determine the source location and acoustic emission parameters of each acoustic emission event.

[0057] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with th...

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Abstract

The invention relates to a rock acoustic emission parameter determination method and system based on moment tensor analysis. The method comprises the following steps: constructing a numerical model of a rock sample to be tested according to macromechanical parameters; loading the numerical model through PFC software, simulating the damage process of the rock sample to be tested, and identifying the rupture time and position of each microcrack in the process of loading the numerical model through the PFC software; in the process of loading the numerical model by the PFC software, if the rock grains of the two micro-cracks generated in sequence have the same rock grain, and the generation time interval of the two micro-cracks is less than the duration of the current acoustic emission event, determining that the two micro-cracks are the same acoustic emission event; taking geometric centers of all micro-crack positions in the spatial range of the acoustic emission event as seismic source positions corresponding to the acoustic emission event; and determining acoustic emission parameters of each acoustic emission event according to a moment tensor analysis method. According to the invention, the seismic source position and the acoustic emission parameter of each acoustic emission event can be determined.

Description

technical field [0001] The invention relates to the technical field of acoustic emission monitoring, in particular to a method and system for determining rock acoustic emission parameters based on moment tensor analysis. Background technique [0002] Rock is a typical heterogeneous material, and its deformation and failure occur gradually. Understanding the gradual failure process of rock is of great significance to many projects. However, the progressive damage of rock materials is caused by the initiation, expansion and penetration of microcracks, which is difficult to be directly observed and quantified. For this reason, scholars and engineers need to use other means for research. Among them, acoustic emission monitoring, as a non-destructive monitoring technology, has been widely used in the field of rock mechanics and engineering. Acoustic emission is an elastic wave produced by the release of strain energy in rock during the fracture process. Through further analysis ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/14G01N29/44G06F30/20G06F111/10
CPCG01N29/14G01N29/4472G06F30/20G01N2291/0232G06F2111/10G01N3/08G01N29/043G01N29/07G01N29/4418G01N3/068G01N3/60
Inventor 翟梦阳薛雷步丰畅黄晓林张珂许超
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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