{"title":"预测黑砂岩在不同冻结温度下失效的声发射信号临界减速特征","authors":"Zilong Zhou, Zhen Wang, Barkat Ullah","doi":"10.1007/s10064-024-03997-z","DOIUrl":null,"url":null,"abstract":"<div><p>This study examines the influence of sub-zero temperatures on the mechanical behavior and failure prediction of black sandstone. For this, quasi-static compression tests were conducted on black sandstone specimens under various temperatures, 5 °C, -5 °C, -10 °C, and − 20 °C. An acoustic emission (AE) monitoring technique was utilized to reveal the damage features of the rock at negative temperatures. The autocorrelation coefficient (AC) and variance of AE counts were assessed using the critical slowing down (CSD) theory to examine the precursor characteristics of rock failure under sub-zero temperatures. Further, the analysis of correlation dimension (CD) evolution was conducted to validate the results of CSD theory. The results indicate that as the temperature decreased from 5 °C to -20 °C, the uniaxial compressive strength (UCS) of the black sandstone increased by 43.09%. The AE counts, and cumulative counts effectively reflect the damage progression in the rock under compressive loading. The AE counts, and AE cumulative counts gradually rise with decreasing temperatures, indicating a more intense AE response. The AE signals associated with rock failure demonstrate CSD phenomena, where abrupt increases in the AC and variance curves of AE counts can be used to predict the ferocious failure. Furthermore, the findings show that the precursory time lag in black sandstone samples increases as the temperature decreases. Compared to CD and AC curves, the variance curve of AE counts provides a more distinct early warning feature for predicting rock failure under sub-zero temperatures. Consequently, this research holds significant implications for the prediction of rock failure in cold regions.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":null,"pages":null},"PeriodicalIF":3.7000,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Critical slowing down features of acoustic emission signals for predicting the failure of black sandstone under different freezing temperatures\",\"authors\":\"Zilong Zhou, Zhen Wang, Barkat Ullah\",\"doi\":\"10.1007/s10064-024-03997-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This study examines the influence of sub-zero temperatures on the mechanical behavior and failure prediction of black sandstone. For this, quasi-static compression tests were conducted on black sandstone specimens under various temperatures, 5 °C, -5 °C, -10 °C, and − 20 °C. An acoustic emission (AE) monitoring technique was utilized to reveal the damage features of the rock at negative temperatures. The autocorrelation coefficient (AC) and variance of AE counts were assessed using the critical slowing down (CSD) theory to examine the precursor characteristics of rock failure under sub-zero temperatures. Further, the analysis of correlation dimension (CD) evolution was conducted to validate the results of CSD theory. The results indicate that as the temperature decreased from 5 °C to -20 °C, the uniaxial compressive strength (UCS) of the black sandstone increased by 43.09%. The AE counts, and cumulative counts effectively reflect the damage progression in the rock under compressive loading. The AE counts, and AE cumulative counts gradually rise with decreasing temperatures, indicating a more intense AE response. The AE signals associated with rock failure demonstrate CSD phenomena, where abrupt increases in the AC and variance curves of AE counts can be used to predict the ferocious failure. Furthermore, the findings show that the precursory time lag in black sandstone samples increases as the temperature decreases. Compared to CD and AC curves, the variance curve of AE counts provides a more distinct early warning feature for predicting rock failure under sub-zero temperatures. Consequently, this research holds significant implications for the prediction of rock failure in cold regions.</p></div>\",\"PeriodicalId\":500,\"journal\":{\"name\":\"Bulletin of Engineering Geology and the Environment\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.7000,\"publicationDate\":\"2024-11-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Bulletin of Engineering Geology and the Environment\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10064-024-03997-z\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, ENVIRONMENTAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of Engineering Geology and the Environment","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10064-024-03997-z","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0
摘要
本研究探讨了零度以下的温度对黑砂岩力学行为和失效预测的影响。为此,在 5 ℃、-5 ℃、-10 ℃ 和 -20 ℃ 等不同温度下对黑砂岩试样进行了准静态压缩试验。利用声发射(AE)监测技术揭示了岩石在负温度下的破坏特征。利用临界放缓(CSD)理论评估了声发射计数的自相关系数(AC)和方差,以研究零下温度下岩石破坏的前兆特征。此外,还进行了相关维度(CD)演变分析,以验证 CSD 理论的结果。结果表明,当温度从 5 °C 降到 -20 °C 时,黑砂岩的单轴抗压强度(UCS)增加了 43.09%。AE 计数和累积计数有效地反映了岩石在压缩荷载作用下的破坏过程。随着温度的降低,AE 计数和 AE 累积计数逐渐上升,表明 AE 反应更加强烈。与岩石破坏相关的 AE 信号显示了 CSD 现象,AE 计数的 AC 和方差曲线的突然增加可用于预测破坏的严重程度。此外,研究结果表明,黑砂岩样本的前兆时滞会随着温度的降低而增加。与 CD 和 AC 曲线相比,AE 计数的方差曲线在预测零下温度下的岩石破坏方面提供了更明显的预警特征。因此,这项研究对预测寒冷地区的岩石破坏具有重要意义。
Critical slowing down features of acoustic emission signals for predicting the failure of black sandstone under different freezing temperatures
This study examines the influence of sub-zero temperatures on the mechanical behavior and failure prediction of black sandstone. For this, quasi-static compression tests were conducted on black sandstone specimens under various temperatures, 5 °C, -5 °C, -10 °C, and − 20 °C. An acoustic emission (AE) monitoring technique was utilized to reveal the damage features of the rock at negative temperatures. The autocorrelation coefficient (AC) and variance of AE counts were assessed using the critical slowing down (CSD) theory to examine the precursor characteristics of rock failure under sub-zero temperatures. Further, the analysis of correlation dimension (CD) evolution was conducted to validate the results of CSD theory. The results indicate that as the temperature decreased from 5 °C to -20 °C, the uniaxial compressive strength (UCS) of the black sandstone increased by 43.09%. The AE counts, and cumulative counts effectively reflect the damage progression in the rock under compressive loading. The AE counts, and AE cumulative counts gradually rise with decreasing temperatures, indicating a more intense AE response. The AE signals associated with rock failure demonstrate CSD phenomena, where abrupt increases in the AC and variance curves of AE counts can be used to predict the ferocious failure. Furthermore, the findings show that the precursory time lag in black sandstone samples increases as the temperature decreases. Compared to CD and AC curves, the variance curve of AE counts provides a more distinct early warning feature for predicting rock failure under sub-zero temperatures. Consequently, this research holds significant implications for the prediction of rock failure in cold regions.
期刊介绍:
Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces:
• the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations;
• the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change;
• the assessment of the mechanical and hydrological behaviour of soil and rock masses;
• the prediction of changes to the above properties with time;
• the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.