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。
To investigate the changes of ultrasonic wave velocity and the patterns of acoustic emission activity during the process of rock rupture, an integrative testing device for acoustic wave and acoustic emission of rock is developed independently. This device consists of three parts, including acoustic wave testing system, acoustic emission testing system and data acquiring, storing and processing system. The testing systems are connected with the data acquiring, storing, processing system via the connectors located at the base of the device, and are further controlled by the latter. Moreover, the acoustic wave testing system and acoustic emission testing system can independently and synchronously monitor the information of ultrasonic wave and acoustic emission. The functions of the data acquiring, storing, processing system are to collect and store the data of ultrasonic wave velocity and acoustic emission in real time, and to achieve data identifying, screening and post-processing. The device is employed to perform the uniaxial loading test of salt rock, marble and granite and triaxial loading test of salt rock for verifying the applicability. It is found that the obtained changes of ultrasonic wave velocity, the patterns of acoustic emission activity and positioning map of acoustic emission are working well. Therefore, it is believed that the developed device can achieve the simultaneous monitoring of ultrasonic wave velocity and acoustic emission activity under uniaxial and triaxial loading tests. In view of the steady performance and high accuracy of this developed device, it would be a new tool for exploring the fracture mechanism and damage evaluation of rock.
