Application of Fiber Bragg Grating Technology in Deformation Monitoring of Shaft Wall Melting Stage

In view of the complex change problems of shaft wall stress characteristics during freezing thawing of deep loose bed freezing shaft, in order to ensure the safety of the auxiliary shaft construction for Banji Coal Mine, based on the fiber bragg grating sensing technology, we analyze the sensing mechanical model, build on-line monitoring system with the FBG strain sensor, and operate the information monitoring of shaft lining structure to obtain real time data of multi-direction and multi-layer in shaft well. Compared with monitoring data of the traditional vibrating string sensing technology, it is found that the two kinds of monitoring results are consistent in time and space, and it can basically reflect the complex stress condition of the shaft bending section. Application results show that fiber bragg grating sensor monitoring system can monitor the strain changes of the concrete inside the shaft lining on line in real time, and the safety condition of the whole shaft lining can be mastered more accurately.