Patent ID: 11879336
Assignee: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC E  G | IPC E  G

Claim 0:
1. A monitoring device for dynamic development of an overburden mining separated bed, comprising:
a settlement magnetic ring assembly, comprising an anchor strap assembly, a magnetic induction iron ring and a magnetic ring sleeve sleeved outside the magnetic induction iron ring, wherein the anchor strap assembly is arranged at an outer circumference of the magnetic ring sleeve, the anchor strap assembly has a contraction state and an expansion state, the anchor strap assembly in the contraction state is configured to move in a monitoring hole, and at least two fixing points at different heights are formed in the anchor strap assembly in the expansion state and a wall of the monitoring hole in a vertical direction; and
a mounting conduit, wherein two ends of the mounting conduit are connected to a drill rod and the magnetic ring sleeve respectively, the anchor strap assembly is in the contraction state or the expansion state by matching the drill rod with the mounting conduit to achieve mounting and recovery of the settlement magnetic ring assembly.