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

由于难以解释记录的波形，应用声发射（AE）方法监测岩石裂缝迄今尚未成功。本实验研究直接解决了声发射方法的难点，通过使用大样本（0.3 x 0.3 x 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时间。本研究将采用现代处理技术对用于监测岩石破裂过程的声发射方法进行量化。高频换能器将被使用，一个极宽的波段记录器将被用来记录波形与高保真度。数字化和处理将以先进的规模进行，以确保对声发射数据进行完整彻底的分析。

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.