A Quasi-Distributed Fiber-Optical Monitoring System for Movement of Roof Strata in Mines

The R&D project on the novel method and facilities for ground control is presented. The relevant literature and advanced design efforts are comprehensively reviewed. A simple design of an optical fiber displacement sensor is proposed. Its cardinal difference from the monitoring systems currently in operation in coal mines is the use of a single mode fiber as a sensitive element. The new hardware and software system improves ground control and enhances safety of mining. The geotechnical condition of roadways is identified by means of comparison of light spot apertures.