Abstract Sinkhole is a unique geological disaster, which has the characteristics of concealment in space, accumulation in the development process and sudden collapse caused by roof instability, and the whole development process contains deformation and vibration information. This paper presents a distributed optical fiber strain-vibration joint system based on distributed optical fiber strain and vibration sensing techniques for collapse monitoring. Firstly, a multi-parameter distributed fiber optical sensor is developed and its strain-vibration sensing characteristics are studied. And then, one model test and a case study related to collapse monitoring are carried out, the multi-parameter distributed optical fiber sensors are used to monitor the development of the sinkholes. In comparison of the strain and the vibration data, the strain can be used to evaluate the subsidence, and the vibration signal can be used to monitor the sudden collapse, which proves it is a promising solution for whole-process monitoring of sinkhole collapse.

中文翻译：

---

基于分布式光纤应变-振动联合系统的天坑塌陷全过程监测及铁路路基案例研究

摘要 天坑是一种独特的地质灾害，具有空间隐蔽、发展过程中积累、顶板失稳引起突然倒塌等特点，整个发展过程都包含变形和振动信息。本文提出了一种基于分布式光纤应变和振动传感技术的用于坍塌监测的分布式光纤应变振动联合系统。首先，研制了一种多参数分布式光纤传感器，研究了其应变-振动传感特性。然后，进行了与坍塌监测相关的模型试验和案例研究，采用多参数分布式光纤传感器对天坑的发展进行监测。在应变和振动数据的比较中，