Failure risk identification of supporting bolt in coal mine roadway

The reliable bolt support system and real-time monitoring system of coal mine roadway can monitor the surrounding rock stress of bolt in real time and prevent the occurrence of mine pressure accidents. However, there are few studies on the failure and destruction of anchor structure, and there is no effective means to identify the failure risk of anchor structure. Based on a coal mining project, the field monitoring test of FBG(Fiber Bragg Grating)bolt sensor is carried out, and the mutation point detection algorithm based on statistical principle is improved. The structural failure risk identification algorithm for supporting bolt in coal mine roadway is formed, and the identified mutation / jump point is further analyzed. The model curve of abnormal state of bolt is put forward, and the support state of field bolt is classified, and the early warning state of field service bolt in coal mine roadway is determined.