Optical fiber sensing technology in deformation monitoring shaft of Jinchuan Mine

摘要

It is of great significance that in order to take timely measures to prevent from mine disasters and reduce economical losses establishes automatic realtime monitoring system. Laboratory experiments have studied the different optical fiber sensors embedded mode, bonding materials and construction technology to the monitoring effect of structural deformation. These provide experience and theoretical basis for fiber-optic monitoring of the shaft project. Combined with 14 row wind-well reinforcement engineering of Jinchuan Mine No.2, fiber-optic grating sensor monitoring system is designed and laid. The results showed that: BOTDR optical fiber sensing technology with the advantages of real-time, remote, automated monitoring of rock deformation, can visually display different locations deformation distribution characteristics in the shaft wall rock, for health conditions of the shaft provide accurate monitoring data, in order to provides the basis for predicting the damage to the shaft and timely reinforcement scheme. The technology has not only broad application prospects in the state's long-term monitoring of rock deformation of the mine project, but also provides a reference to similar shaft deformation monitoring.