A monitoring device for surface subsidence in coal mine goaf

Abstract

The invention discloses a surface subsidence monitoring device for a coal mine goaf, which includes a monitoring placement tube, a top cover, a hook, a stabilizing cone, an anchor rod and a multi-directional monitoring component, wherein the top cover is fixed to the monitoring placement tube and a hook is fixed on the top of the top cover, so that the monitoring placement cylinder can be put into the pre-drilled hole through the hook, and the bottom of the monitoring placement cylinder is also fixed with a stabilizing cone; multiple sets of the multi-directional monitoring assembly along the The same axis is arranged at intervals on the monitoring placement cylinder, and the spacing is the same as that between adjacent rock formations, and the monitoring end of the multi-directional monitoring component is connected with the anchor rod, and the anchor rod is anchored in the pre-drilled hole. In the side wall, it is closely connected with the rock formation. When monitoring, the monitoring end of the multi-directional monitoring component is driven by the movement of the anchorage, so as to monitor.

Description

technical field [0001] The invention relates to the technical field of settlement monitoring, in particular to a surface settlement monitoring device in a coal mine goaf. Background technique [0002] Coal mine goaf refers to the cavity or cavity left after the mining of underground coal or coal gangue is completed in the process of coal mine operation. Subsidence will endanger the lives of nearby people, so it is necessary to use relevant equipment for real-time monitoring to ensure life safety and the progress of the project. [0003] At present, the methods of monitoring surface subsidence include using GPS positioning and leveling to measure, but the GPS positioning accuracy is general, and the installation cost of the leveling is relatively high, which are not suitable for large-scale use. There are also mechanical monitoring methods. However, it is often only able to monitor the subsidence of the surface but not the overall excursion, etc. The subsidence often occurs ...

AI Technical Summary

Problems solved by technology

[0003] At present, the methods of surface subsidence monitoring include GPS positioning and leveling instruments for measurement, but the accuracy of GPS positioning is average, and the cost of laying out leveling instruments is relatively high, which are not suitable for large-scale use. There are also existing methods that use mechanical monitoring. However, it is often only able to monitor the subsidence of the surface but not the overall migration, etc., and the subsidence often occurs after the migration, so it has a certain hysteresis

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