Real-time monitoring and early warning device for tunnel collapse

The utility model discloses a real-time monitoring and early warning device for tunnel collapse. The transmitting part comprises a plurality of laser transmitting devices; the monitoring part comprises a monitoring device and a display device; laser emitted by a laser emitting device installed at the tunnel surrounding rock penetrates through a lens and irradiates on a baffle to form light spots, a photoelectric detector converts the light spots into electric signals, the three-dimensional coordinate displacement value of the surrounding rock point where the laser emitting device is installed is detected, and the three-dimensional movement value of the surrounding rock point is calculated through difference between adjacent moments. If the movement threshold value is reached or exceeded, early warning is carried out, and meanwhile, the steps are repeated to monitor the three-dimensional movement values of other surrounding rock points in the tunnel. The device is simpler to implement and use, more convenient