Geomechanics and Engineering

  • 제12권4호
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  • Pages.627-637
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  • 2017
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Study on correlation of acoustic emission and plastic strain based on coal-rock damage theory

  • Jin, Peijian (School of Municipal & Environmental Engineering, Jilin Jianzhu University) ;
  • Wang, Enyuan (College of Safety Engineer, China University of Mining and Technology) ;
  • Song, Dazhao (College of Safety Engineer, China University of Mining and Technology)
  • 투고 : 2016.01.08
  • 심사 : 2016.12.04
  • 발행 : 2017.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

The high positive correlation between plastic strain of loaded coal-rock and AE (acoustic emission) characteristic parameter was studied and proved through AE experiment during coal-rock uniaxial compression process. The results show that plastic strain in the whole process of uniaxial compression can be gained through the experiment. Moreover, coal-rock loaded process can be divided into four phases through analyzing the change of the plastic strain curve : pressure consolidation phase, apparent linear elastic phase, accelerated deformation phase, rupture and development phase, which corresponds to conventional elastic-plastic change law of loaded coal-rock. The theoretical curve of damage constitutive model is in high agreement with the experimental curve. So the damage evolution law of coal rock damage can be indicated by both acoustic emission and plastic strain. The results have great academic and realistic significance for further study of both AE signal characteristics during loaded coal-rock damaged process and the forecasting of coal-rock dynamic disasters.

키워드

과제정보

연구 과제 주관 기관 : Education Department of Jilin Province

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피인용 문헌

  1. Acoustic Emission and Failure Modes for Coal-Rock Structure under Different Loading Rates vol.2018, pp.1687-8094, 2018, https://doi.org/10.1155/2018/9391780
  2. Influence of interaction between coal and rock on the stability of strip coal pillar vol.16, pp.2, 2017, https://doi.org/10.12989/gae.2018.16.2.151
  3. Study on Bending Damage Constitutive Model and Mechanical Properties of Limestone Based on Acoustic Emission vol.2019, pp.None, 2017, https://doi.org/10.1155/2019/2031520
  4. ANALYSIS ON THE TIME-FREQUENCY CHARACTERISTICS OF ULTRASONIC WAVEFORM OF COAL UNDER UNIAXIAL LOADING vol.27, pp.6, 2019, https://doi.org/10.1142/s0218348x19501007
  5. Comparative study on three-dimensional conventional and modified statistical damage constitutive models vol.2, pp.4, 2019, https://doi.org/10.1007/s41939-019-00052-3
  6. Theoretical and Experimental Study of the Effects of Impact Drilling Parameters on the Properties of Surrounding Rock Damage vol.2020, pp.None, 2020, https://doi.org/10.1155/2020/8865619
  7. Energy evolution characteristics of coal specimens with preformed holes under uniaxial compression vol.20, pp.1, 2017, https://doi.org/10.12989/gae.2020.20.1.055
  8. Assessment of properties of coal seams as destructible environments vol.837, pp.None, 2017, https://doi.org/10.1088/1757-899x/837/1/012009
  9. Laser Vibration Characteristics of Marble Specimens and Failure Criterion vol.12, pp.4, 2017, https://doi.org/10.3390/app12042223