A method of subsidence monitoring in goaf subsidence area using subsidence monitoring system

Abstract

The invention discloses a goaf subsidence region sinkage monitoring system and method, belonging to the field of environment treatment of mining areas. The method comprises the following steps: making a monitoring hole from the ground to the goaf floor, arranging a steel base retaining cylinder on the bottom of the hole, and anchoring to wall rock through an annular bulge under the action of structural adhesive or cement mortar; respectively and mutually nesting a constant-speed sinkage layer retaining cylinder, a low-speed sinkage layer retaining cylinder and a slight-speed sinkage layer retaining cylinder with the steel base retaining cylinder layer by layer through a seal ring and balls, and anchoring with the affiliated layer through the annular bulge; and by using a first fixed end, a first measuring tape, a second fixed end, a second measuring tape, a third fixed end and a third measuring tape, reading the sinkage values of the layers by the aid of a ground pulley and a counterweight-weight composite structure, thereby implementing the monitoring on the goaf subsidence region. The system and method can implement real-time continuous small-scale monitor on sinkage development of the goaf subsidence region, and provides powerful support for environment treatment of mining areas.

Description

technical field [0001] The invention relates to the field of environmental management in mining areas, in particular to a method for monitoring subsidence in goaf subsidence areas by using a subsidence monitoring system. Background technique [0002] my country's coal mineral resources are very rich. While the development of coal resources has made great contributions to social and economic development, it has also caused a very significant impact and even damage to the environment of mining areas. In particular, the goaf subsidence area formed by underground mining is the main cause of environmental problems in mining areas, seriously endangering the safety of people's lives and property in mining areas, restricting the sustainable development of local social economy, and is the main content of environmental governance in mining areas. Since 95% of my country's coal production comes from underground mining, "three zones" will be formed after the goaf roof collapses in under...

AI Technical Summary

Problems solved by technology

[0003] At present, the methods for subsidence monitoring in goaf subsidence areas mainly include laser measurement, leveling measurement, total station measurement, GPS measurement and D-InSAR measurement, etc. All these monitoring methods, such as the vehicle-mounted laser measurement method for mining area subsidence invented by Wu Lixin ( Application number: CN201110026660.3), its shortcoming is that it can only monitor the subsidence that has formed, but cannot monitor the subsidence development of each layer below the strata in real time and continuously

In addition, the insufficiency of GPS (Global Positioning System) measurement is also reflected in that it can only reflect the deformation of individual underground monitoring points, but cannot reflect the change of subsidence as a whole; although D-InSAR (Differential Interferometric Synthetic Aperture Radar) measurement reflects the overall subsidence of the mining area, it cannot Real-time continuous monitoring, and foreign technical support is also required

Another example is a monitoring system for horizontal deformation of soil in goaf subsidence areas invented by Wu Zhangzhong (application number: CN201010242650.9). The impact of buried oil and gas pipelines, its shortcoming is that it only monitors the subsidence of the local layers of the topsoil

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