Abstract: Faced with the issue of rock shift monitoring of large mined-out area and mined-out area overhanging layer，a new type of large range high-precision multichannel non-contact rock shift monitoring system was studied and developed which is different from the traditional displacement meter.Within Dahongshan LV+1090 adit，a 4-channel of rock shift real-time monitoring system with beaded style arrangement，and continuous monitoring range of 400 m to realize the all-weather real-time shift monitoring and data remote transmission.Through the system，the real-time waveform and the daily average shift curve of the small changes of millimetre magnitude can be monitored intuitively at surface room，and its real-time warning function is verified.The monitoring data from the system can reflect the cracks and sedimentation in time and accurately，and it becomes the main tool of the rock shift monitoring.The system monitoring results were consistent with on-site rock shift，which confirmed the reliability of the system.Therefore，the system provides a reliable technique for monitoring rock shift of the large mined-out area and the overhanging roof.

Key words: Rock shift, Real-time monitoring, High precision, Large mined-out area