【摘要】 在模拟矿山开采引起的岩层运动时,将光纤传感器埋入模型的岩层中,研究采用光纤传感技术监测岩体变形的理论和技术。提出一种基于光时域反射技术的分布式光纤传感系统和一种新的测试方法,设计出新型光纤微弯传感器,该传感器既可以实现微弯,又可以实现宏弯。通过 2 m 相似材料模型实验,验证了光纤测试岩梁变形的可行性。更多还原

【Abstract】 Optical fiber sensor is embeded in rock layer of model to find premonitory information of rock deformation and the process of rock damage with mining. Based on optical time domain reflectomter technology,a new type of microbending sensor,named snakelike optical fiber sensor is presented. The sensor can achieve not only microbending,but also macrobending. By using the 2 m-size simulation experiment with analogy material, the feasibility of optical fiber detection of rock deformation is verified.更多还原