Piezoelectric characteristics of coal rock leakage under uniaxial compression

Abstract In coal mining, coal rock fracturing damage and leakage pose significant challenges. To study the relationship between piezoelectric signals and seepage characteristics during uniaxial compression, and to achieve leakage monitoring based on piezoelectric signals, a coal rock fracturing dama...

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Main Authors: Zeyi Liu, Ke Gao, Yujiao Liu, Chengyao Zhu, Yao Zhang
Format: Article
Language:English
Published: Nature Portfolio 2025-02-01
Series:Scientific Reports
Subjects:
Online Access:https://doi.org/10.1038/s41598-025-88269-w
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author Zeyi Liu
Ke Gao
Yujiao Liu
Chengyao Zhu
Yao Zhang
author_facet Zeyi Liu
Ke Gao
Yujiao Liu
Chengyao Zhu
Yao Zhang
author_sort Zeyi Liu
collection DOAJ
description Abstract In coal mining, coal rock fracturing damage and leakage pose significant challenges. To study the relationship between piezoelectric signals and seepage characteristics during uniaxial compression, and to achieve leakage monitoring based on piezoelectric signals, a coal rock fracturing damage and leakage monitoring experiment was carried out using coal from the Zhaogu Mine in Henan Province. The wavelet packet energy was introduced to investigate the piezoelectric characteristics. The results indicate the relative variation in wavelet packet energy server as a damage index during the uniaxial compression of coal, correlating closely with permeability changes. The wavelet packet energy at the end of the elastic deformation stage was 0.26 V2, similar to the pre-compression value of 0.29 V2. Therefore, the overall damage in the compression and elastic deformation stages was approximately 0. Permeability values remained stable, fluctuating from 0.26 × 10−16 m2 to 0.11 × 10−16 m2. In the plastic deformation stage, wavelet packet energy decreased while the damage index and permeability rose. Prior to peak stress, wavelet packet energy and damage index plateaued, signaling a precursor to a sudden increase in permeability. Post-peak stress, a marked decline in wavelet packet energy and an increase in the damage index and permeability were observed. This study offers a method for monitoring coal rock leakage, contributing valuable insights for efficient coalbed methane extraction and timely safety alerts.
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issn 2045-2322
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publishDate 2025-02-01
publisher Nature Portfolio
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series Scientific Reports
spelling doaj-art-f658c0a5f061438f9ca223baa8e40e912025-02-09T12:32:00ZengNature PortfolioScientific Reports2045-23222025-02-0115111710.1038/s41598-025-88269-wPiezoelectric characteristics of coal rock leakage under uniaxial compressionZeyi Liu0Ke Gao1Yujiao Liu2Chengyao Zhu3Yao Zhang4College of Safety Science and Engineering, Liaoning Technical UniversityCollege of Safety Science and Engineering, Liaoning Technical UniversityCollege of Safety Science and Engineering, Liaoning Technical UniversityCollege of Safety Science and Engineering, Liaoning Technical UniversityCollege of Safety Science and Engineering, Liaoning Technical UniversityAbstract In coal mining, coal rock fracturing damage and leakage pose significant challenges. To study the relationship between piezoelectric signals and seepage characteristics during uniaxial compression, and to achieve leakage monitoring based on piezoelectric signals, a coal rock fracturing damage and leakage monitoring experiment was carried out using coal from the Zhaogu Mine in Henan Province. The wavelet packet energy was introduced to investigate the piezoelectric characteristics. The results indicate the relative variation in wavelet packet energy server as a damage index during the uniaxial compression of coal, correlating closely with permeability changes. The wavelet packet energy at the end of the elastic deformation stage was 0.26 V2, similar to the pre-compression value of 0.29 V2. Therefore, the overall damage in the compression and elastic deformation stages was approximately 0. Permeability values remained stable, fluctuating from 0.26 × 10−16 m2 to 0.11 × 10−16 m2. In the plastic deformation stage, wavelet packet energy decreased while the damage index and permeability rose. Prior to peak stress, wavelet packet energy and damage index plateaued, signaling a precursor to a sudden increase in permeability. Post-peak stress, a marked decline in wavelet packet energy and an increase in the damage index and permeability were observed. This study offers a method for monitoring coal rock leakage, contributing valuable insights for efficient coalbed methane extraction and timely safety alerts.https://doi.org/10.1038/s41598-025-88269-wUniaxial compressionPiezoelectric aggregateLeakage monitoringWavelet packet energyDamage indicators
spellingShingle Zeyi Liu
Ke Gao
Yujiao Liu
Chengyao Zhu
Yao Zhang
Piezoelectric characteristics of coal rock leakage under uniaxial compression
Scientific Reports
Uniaxial compression
Piezoelectric aggregate
Leakage monitoring
Wavelet packet energy
Damage indicators
title Piezoelectric characteristics of coal rock leakage under uniaxial compression
title_full Piezoelectric characteristics of coal rock leakage under uniaxial compression
title_fullStr Piezoelectric characteristics of coal rock leakage under uniaxial compression
title_full_unstemmed Piezoelectric characteristics of coal rock leakage under uniaxial compression
title_short Piezoelectric characteristics of coal rock leakage under uniaxial compression
title_sort piezoelectric characteristics of coal rock leakage under uniaxial compression
topic Uniaxial compression
Piezoelectric aggregate
Leakage monitoring
Wavelet packet energy
Damage indicators
url https://doi.org/10.1038/s41598-025-88269-w
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AT kegao piezoelectriccharacteristicsofcoalrockleakageunderuniaxialcompression
AT yujiaoliu piezoelectriccharacteristicsofcoalrockleakageunderuniaxialcompression
AT chengyaozhu piezoelectriccharacteristicsofcoalrockleakageunderuniaxialcompression
AT yaozhang piezoelectriccharacteristicsofcoalrockleakageunderuniaxialcompression