Research on Rock Crack Classification Based on Acoustic Emission Waveform Feature Extraction Technology
AbstractRock fracture mode has practical significance for the prediction and prevention of engineering disasters, and the inversion of fracture mode by the waveform signal not only reduces the experimental error of the mechanical strength measurement but also simplifies the type and...
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Format: | Article |
Language: | English |
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GeoScienceWorld
2022-03-01
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Series: | Lithosphere |
Online Access: | https://pubs.geoscienceworld.org/lithosphere/article/2022/Special%2011/5804064/612497/Research-on-Rock-Crack-Classification-Based-on |
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author | Ziwei Ding Xiaofei Li Qingbao Tang Jindui Jia Chengdeng Gao Shaoyi Wang |
author_facet | Ziwei Ding Xiaofei Li Qingbao Tang Jindui Jia Chengdeng Gao Shaoyi Wang |
author_sort | Ziwei Ding |
collection | DOAJ |
description |
AbstractRock fracture mode has practical significance for the prediction and prevention of engineering disasters, and the inversion of fracture mode by the waveform signal not only reduces the experimental error of the mechanical strength measurement but also simplifies the type and quantity of disaster prediction source data. For the relationship between crack mode and mechanical strength, the acoustic emission (AE) waveform signal is studied. Six coarse-grained sandstone samples were tested by uniaxial compression, AE, and scanning electron microscopy. The results show that the number of microhole cracks in rock is positively correlated with tensile-shear cracks and negatively correlated with mechanical strength. The quadratic function regression curve of the proportion of shear cracks and mechanical strength is more realistic. When crack ratio is less than 0.31, the number of shear cracks is positively correlated with the mechanical strength and vice versa. The waveform mutation coefficient k is defined as the overall change description. It is found that the increase of signal mutation has a positive impact on the mechanical strength of rock. The fitting function of crack and the signal mutation near the peak of rock can be divided into six risk zones in a two-dimensional plane. In addition to these exciting results and discoveries, the determination of the number of tensile-shear cracks and its relationship with mechanical strength provide innovative methods and ideas for crack pattern discrimination and rock burst risk assessment of roadway surrounding rock. |
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format | Article |
id | doaj.art-0c829d6fd35c408abd7b9c2a929e23ab |
institution | Directory Open Access Journal |
issn | 1941-8264 1947-4253 |
language | English |
last_indexed | 2024-12-12T15:19:58Z |
publishDate | 2022-03-01 |
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series | Lithosphere |
spelling | doaj.art-0c829d6fd35c408abd7b9c2a929e23ab2022-12-22T00:20:24ZengGeoScienceWorldLithosphere1941-82641947-42532022-03-012022Special 1110.2113/2022/5804064Research on Rock Crack Classification Based on Acoustic Emission Waveform Feature Extraction TechnologyZiwei Ding0http://orcid.org/0000-0002-0310-2358Xiaofei Li1http://orcid.org/0000-0001-7797-4522Qingbao Tang2Jindui Jia3Chengdeng Gao4Shaoyi Wang5College of Energy Engineering Xi’an University of Science and Technology Xi’an 710054 China xust.edu.cnCollege of Energy Engineering Xi’an University of Science and Technology Xi’an 710054 China xust.edu.cnCollege of Energy Engineering Xi’an University of Science and Technology Xi’an 710054 China xust.edu.cnCollege of Energy Engineering Xi’an University of Science and Technology Xi’an 710054 China xust.edu.cnCollege of Energy Engineering Xi’an University of Science and Technology Xi’an 710054 China xust.edu.cnCollege of Energy Engineering Xi’an University of Science and Technology Xi’an 710054 China xust.edu.cn AbstractRock fracture mode has practical significance for the prediction and prevention of engineering disasters, and the inversion of fracture mode by the waveform signal not only reduces the experimental error of the mechanical strength measurement but also simplifies the type and quantity of disaster prediction source data. For the relationship between crack mode and mechanical strength, the acoustic emission (AE) waveform signal is studied. Six coarse-grained sandstone samples were tested by uniaxial compression, AE, and scanning electron microscopy. The results show that the number of microhole cracks in rock is positively correlated with tensile-shear cracks and negatively correlated with mechanical strength. The quadratic function regression curve of the proportion of shear cracks and mechanical strength is more realistic. When crack ratio is less than 0.31, the number of shear cracks is positively correlated with the mechanical strength and vice versa. The waveform mutation coefficient k is defined as the overall change description. It is found that the increase of signal mutation has a positive impact on the mechanical strength of rock. The fitting function of crack and the signal mutation near the peak of rock can be divided into six risk zones in a two-dimensional plane. In addition to these exciting results and discoveries, the determination of the number of tensile-shear cracks and its relationship with mechanical strength provide innovative methods and ideas for crack pattern discrimination and rock burst risk assessment of roadway surrounding rock.https://pubs.geoscienceworld.org/lithosphere/article/2022/Special%2011/5804064/612497/Research-on-Rock-Crack-Classification-Based-on |
spellingShingle | Ziwei Ding Xiaofei Li Qingbao Tang Jindui Jia Chengdeng Gao Shaoyi Wang Research on Rock Crack Classification Based on Acoustic Emission Waveform Feature Extraction Technology Lithosphere |
title | Research on Rock Crack Classification Based on Acoustic Emission Waveform Feature Extraction Technology |
title_full | Research on Rock Crack Classification Based on Acoustic Emission Waveform Feature Extraction Technology |
title_fullStr | Research on Rock Crack Classification Based on Acoustic Emission Waveform Feature Extraction Technology |
title_full_unstemmed | Research on Rock Crack Classification Based on Acoustic Emission Waveform Feature Extraction Technology |
title_short | Research on Rock Crack Classification Based on Acoustic Emission Waveform Feature Extraction Technology |
title_sort | research on rock crack classification based on acoustic emission waveform feature extraction technology |
url | https://pubs.geoscienceworld.org/lithosphere/article/2022/Special%2011/5804064/612497/Research-on-Rock-Crack-Classification-Based-on |
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