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为了研究岩石破裂过程中的超声波波速值和声发射活动规律,自主研发了一套岩石声波、声发射一体化同步测试装置,它主要由声波测试系统、声发射测试系统和数据采集、存储、处理系统三部分组成。声波和声发射测试系统通过试验机底座接口与数据采集、存储、处理系统相连,并受后者控制,可以独立的同步监测岩石的波速与声发射信息;数据采集、存储、处理系统可以实时采集、存储两类声学数据,并实现二者的识别、筛分及后期处理。为了验证该装置的适用性,将其应用于盐岩、大理岩、花岗岩的单轴加载试验及盐岩的三轴加载试验中,均获得了较为理想的波速-应力变化规律、岩石声发射活动趋势及震源定位图。结果表明,所研发的测试装置可以满足单轴、三轴应力状态下岩石破裂过程中声波与声发射信息的同步监测,设备性能稳定,测试数据精度较高,可为探索岩体的破裂损伤机制及损伤评价提供重要的研究手段。
In order to study the ultrasonic wave velocity and the law of acoustic emission during the process of rock burst, a set of synchronous testing device for rock acoustic wave and acoustic emission has been developed independently. It mainly consists of acoustic testing system, acoustic emission testing system and data acquisition, storage and processing System consists of three parts. The acoustic and acoustic emission testing system is connected with the data acquisition, storage and processing system through the base of the testing machine and controlled by the latter to independently monitor the wave velocity and acoustic emission information of the rock. The data acquisition, storage and processing system can be collected in real time , Store two kinds of acoustic data, and realize the identification, screening and post-processing of the two. In order to verify the applicability of this device, the application of this device to uniaxial loading tests of salt rock, marble and granite, and the triaxial loading test of salt rock all have obtained the ideal rule of wave velocity and stress. The rock acoustic emission activity Trend and source positioning map. The results show that the developed test device can meet the synchronous monitoring of acoustic wave and acoustic emission information during the rock burst under uniaxial and triaxial stress conditions. The stability of the device and the high precision of the test data can be used to explore the fracture mechanism of rock mass And damage assessment provide an important research tool.