高分辨率隧道地震超前预报系统

Design of tunnel seismic prediction system with high resolution

针对传统超前预报方法存在占用掌子面、探测距离有限等不足,设计一种基于隧道地震超前预报方法的探测系统。该系统通过人工震源和三分量传感器阵列、高准确度24位数模转换器来实现地震反射信号的高准确度采集;通过基于VB的上位机控制程序以实现人机交互和系统控制。现场测试结果表明,该系统的探测结果与实际钻探结果基本一致,验证该系统具有探测距离远、分辨率高、不占用掌子面等突出特点,可在公路和铁路隧道等隐蔽工程建设中应用。

To overcome the shortages of traditional tunnel prediction methods, a new detection system based on tunnel seismic prediction was designed accordingly. The design principle of the system is to realize high-resolution acquisition of seismic reflective signals with artificial seismic sources,three-component seismic sensors and a high-precision 24-bit analog-to-digital converter.Moreover, human-computer interaction and system control were realized through VB-based PC control procedure. The results of filed test show that the detection results are basically consistent with the actual drilling results,a proof for the characteristics of the system such as long detection distance, high-precision and not occupying the working face. So it can be applied in concealed works of highway tunnels,railway tunnels and other infrastructures.