Cover rock band bending subsidence subsidence monitoring method and apparatus of the mined-out area

The present invention discloses a coating on one kind of band bending subsidence in goaf rock subsidence monitoring method and apparatus, which belongs to the field of environment Coal mine disaster prevention and management. From the ground up monitoring goaf hole until the bottom plate, the bottom of the hole is arranged in the monitoring of steel casing base, and through an annular projection in structural adhesive or cement mortar anchoring effect on surrounding rock; constant speed subsidence layer casing, slow subsidence topsoil layer casing and casing ring and ball respectively by the steel casing base layers nested within each other, and through the annular projection belongs anchoring layer; and then through a first fixed end and the first tape, the second fixing tape measure and a second end, with the ground and tripod turntable composite structures read subsidence value of each rock, rock band to achieve bending subsidence subsidence monitoring. The present invention is capable of real-time, continuous monitoring of small-scale development of mining subsidence subsidence cover bending rock band on an empty area of ​​the master mining influence of great value under migration law and overburden mining subsidence law.