Quantitative Analysis of Acoustic Emissions Produced During Propagation of Discrete Fractures in Rock

岩石离散裂隙扩展过程中产生的声发射的定量分析

• 批准号: 8600567
• 负责人: Priscilla Nelson
• 金额: $ 9.39万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1986
• 资助国家: 美国
• 起止时间: 1986-05-01 至 1989-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8600567&HistoricalAwards=false
• 关键词: Quantitative; Analysis; Acoustic; Emissions; Produced

The application of the acoustic emission (AE) method to monitor rock fractures has thus far not been successful because of the difficulities in interpreting the recorded wave forms. This experimental research directly addresses the difficulties in the AE method by using large specimens (0.3 x 0.3 x 0.6 meters in size) to reduce the effects of reflected waves and to provide time for recording relatively long AE events. Modern processing will be employed in this research to quantify the AE method as applied to monitoring the fracture process in rocks. Very high frequency transducers will be employed and an extremely wide band recorder will be used to record the wave forms with high fidelity. Digitizing and processing will be performed on an advanced scale to ensure complete and thorough analysis of the AE data.

由于很难解释记录的波形，声发射(AE)方法在监测岩石裂缝方面的应用迄今并不成功。这项实验研究直接解决了声发射方法中的困难，使用了大样本(尺寸为0.3×0.3×0.6米)来减少反射波的影响，并为记录相对较长的声发射事件提供了时间。本研究将采用现代处理技术，将声发射方法应用于监测岩石破裂过程。将使用甚高频换能器和极宽频带记录器来记录高保真的波形。将在先进的规模上进行数字化和处理，以确保对声发射数据进行完整和彻底的分析。