Study on the evolution law of acoustic emission time series characteristics of coal-rock assemblage under true triaxial conditions
IntroductionThis study aims to investigate the fractal characteristics of acoustic emission (AE) signals during coal-rock rupture and their predictive significance for impact dynamic hazards.MethodsTrue triaxial loading/unloading tests were conducted on five coal-rock composites with varying coal-th...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2025-05-01
|
| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2025.1594518/full |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849324151704125440 |
|---|---|
| author | Fuquan Gao Chenyang Zhang Chenyang Zhang Lingchen Han Yongxue Xia Yongxue Xia Quanwu Gao Yiqun Zhou Yiqun Zhou Dingyi Li Dingyi Li |
| author_facet | Fuquan Gao Chenyang Zhang Chenyang Zhang Lingchen Han Yongxue Xia Yongxue Xia Quanwu Gao Yiqun Zhou Yiqun Zhou Dingyi Li Dingyi Li |
| author_sort | Fuquan Gao |
| collection | DOAJ |
| description | IntroductionThis study aims to investigate the fractal characteristics of acoustic emission (AE) signals during coal-rock rupture and their predictive significance for impact dynamic hazards.MethodsTrue triaxial loading/unloading tests were conducted on five coal-rock composites with varying coal-thickness ratios using the TRW-3000 system, with AE signals analyzed to correlate stress evolution and temporal-spatial fractal features.ResultsKey findings reveal that: 1) AE parameters exhibit stress-dependent behavior, growing slowly initially, stabilizing during stress-holding, and surging exponentially before peak stress, with ∼90% of cumulative energy released pre-destabilization; 2) Ring counts follow an Λ-type trend against absolute energy, while coal-thickness proportion induces a mirror-image N-type pattern in AE parameters; 3) High-energy/high-ringcount AE events cluster spatiotemporally before failure, with clear time sequence precursors—short-duration ground sounds and consecutive rises in energy/frequency serve as critical early-warning indicators, whereas isolated signals lack hazard relevance.DiscussionThese fractal patterns and precursor thresholds enhance real-time monitoring and risk assessment frameworks, offering actionable strategies for mitigating coal-rock dynamic disasters in underground mining. |
| format | Article |
| id | doaj-art-79bfac905a7c46fd80b8d1eec40bffb1 |
| institution | Kabale University |
| issn | 2296-6463 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj-art-79bfac905a7c46fd80b8d1eec40bffb12025-08-20T03:48:47ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632025-05-011310.3389/feart.2025.15945181594518Study on the evolution law of acoustic emission time series characteristics of coal-rock assemblage under true triaxial conditionsFuquan Gao0Chenyang Zhang1Chenyang Zhang2Lingchen Han3Yongxue Xia4Yongxue Xia5Quanwu Gao6Yiqun Zhou7Yiqun Zhou8Dingyi Li9Dingyi Li10China Coal Northwest Energy and Chemical Group Co., Ltd., Ordos, ChinaCoal Mining Branch, China Coal Research Institute, Beijing, ChinaChina Coal Technology and Engineering Group (CCTEG) Coal Mining Research Institute, Beijing, ChinaChina Coal Northwest Energy and Chemical Group Co., Ltd., Ordos, ChinaCoal Mining Branch, China Coal Research Institute, Beijing, ChinaChina Coal Technology and Engineering Group (CCTEG) Coal Mining Research Institute, Beijing, ChinaChina Coal Northwest Energy and Chemical Group Co., Ltd., Ordos, ChinaCoal Mining Branch, China Coal Research Institute, Beijing, ChinaChina Coal Technology and Engineering Group (CCTEG) Coal Mining Research Institute, Beijing, ChinaCoal Mining Branch, China Coal Research Institute, Beijing, ChinaChina Coal Technology and Engineering Group (CCTEG) Coal Mining Research Institute, Beijing, ChinaIntroductionThis study aims to investigate the fractal characteristics of acoustic emission (AE) signals during coal-rock rupture and their predictive significance for impact dynamic hazards.MethodsTrue triaxial loading/unloading tests were conducted on five coal-rock composites with varying coal-thickness ratios using the TRW-3000 system, with AE signals analyzed to correlate stress evolution and temporal-spatial fractal features.ResultsKey findings reveal that: 1) AE parameters exhibit stress-dependent behavior, growing slowly initially, stabilizing during stress-holding, and surging exponentially before peak stress, with ∼90% of cumulative energy released pre-destabilization; 2) Ring counts follow an Λ-type trend against absolute energy, while coal-thickness proportion induces a mirror-image N-type pattern in AE parameters; 3) High-energy/high-ringcount AE events cluster spatiotemporally before failure, with clear time sequence precursors—short-duration ground sounds and consecutive rises in energy/frequency serve as critical early-warning indicators, whereas isolated signals lack hazard relevance.DiscussionThese fractal patterns and precursor thresholds enhance real-time monitoring and risk assessment frameworks, offering actionable strategies for mitigating coal-rock dynamic disasters in underground mining.https://www.frontiersin.org/articles/10.3389/feart.2025.1594518/fulltrue triaxial testacoustic emissioncoal-rock compositecoal rock rupturetemporal characteristicsrockburst |
| spellingShingle | Fuquan Gao Chenyang Zhang Chenyang Zhang Lingchen Han Yongxue Xia Yongxue Xia Quanwu Gao Yiqun Zhou Yiqun Zhou Dingyi Li Dingyi Li Study on the evolution law of acoustic emission time series characteristics of coal-rock assemblage under true triaxial conditions Frontiers in Earth Science true triaxial test acoustic emission coal-rock composite coal rock rupture temporal characteristics rockburst |
| title | Study on the evolution law of acoustic emission time series characteristics of coal-rock assemblage under true triaxial conditions |
| title_full | Study on the evolution law of acoustic emission time series characteristics of coal-rock assemblage under true triaxial conditions |
| title_fullStr | Study on the evolution law of acoustic emission time series characteristics of coal-rock assemblage under true triaxial conditions |
| title_full_unstemmed | Study on the evolution law of acoustic emission time series characteristics of coal-rock assemblage under true triaxial conditions |
| title_short | Study on the evolution law of acoustic emission time series characteristics of coal-rock assemblage under true triaxial conditions |
| title_sort | study on the evolution law of acoustic emission time series characteristics of coal rock assemblage under true triaxial conditions |
| topic | true triaxial test acoustic emission coal-rock composite coal rock rupture temporal characteristics rockburst |
| url | https://www.frontiersin.org/articles/10.3389/feart.2025.1594518/full |
| work_keys_str_mv | AT fuquangao studyontheevolutionlawofacousticemissiontimeseriescharacteristicsofcoalrockassemblageundertruetriaxialconditions AT chenyangzhang studyontheevolutionlawofacousticemissiontimeseriescharacteristicsofcoalrockassemblageundertruetriaxialconditions AT chenyangzhang studyontheevolutionlawofacousticemissiontimeseriescharacteristicsofcoalrockassemblageundertruetriaxialconditions AT lingchenhan studyontheevolutionlawofacousticemissiontimeseriescharacteristicsofcoalrockassemblageundertruetriaxialconditions AT yongxuexia studyontheevolutionlawofacousticemissiontimeseriescharacteristicsofcoalrockassemblageundertruetriaxialconditions AT yongxuexia studyontheevolutionlawofacousticemissiontimeseriescharacteristicsofcoalrockassemblageundertruetriaxialconditions AT quanwugao studyontheevolutionlawofacousticemissiontimeseriescharacteristicsofcoalrockassemblageundertruetriaxialconditions AT yiqunzhou studyontheevolutionlawofacousticemissiontimeseriescharacteristicsofcoalrockassemblageundertruetriaxialconditions AT yiqunzhou studyontheevolutionlawofacousticemissiontimeseriescharacteristicsofcoalrockassemblageundertruetriaxialconditions AT dingyili studyontheevolutionlawofacousticemissiontimeseriescharacteristicsofcoalrockassemblageundertruetriaxialconditions AT dingyili studyontheevolutionlawofacousticemissiontimeseriescharacteristicsofcoalrockassemblageundertruetriaxialconditions |