Failure risk identification of supporting bolt in coal mine roadway

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.