Flexural guided wave monitoring method applied to early warning break of tailings pond dam body

Abstract

The invention discloses a flexural guided wave monitoring method applied to early warning the break of a tailings pond dam body. The method comprises the steps of 1, determining the position of a monitoring point along the span direction of a fill dam on the basis of fully analyzing existing engineering data and performing geological surveying and mapping; 2, drilling a hole at the position of the monitoring point and pre-embedding a waveguide rod array: 1, drilling the hole at the position of the monitoring point and pre-embedding a PVC pipe; 2, selecting a waveguide rod; 3, determining the number N of the waveguide rods; 4, placing the waveguide rods at the central position of the PVC pipe; and 5, plugging the opening with a rubber plug; 3, installing a flexural guided wave sensor; 4, building a signal collection base station; 5, collecting signals; and 6, analyzing and processing data. The flexural guided wave monitoring method applied to early warning the break of the tailings pond dam body provided by the invention has the advantages of low labor cost, all-weather automatic monitoring, simple and easy to operate and simple in data analysis, and has fewer error factors and relatively high detection accuracy.

Description

technical field [0001] The invention relates to the technical field of mine construction, in particular to a bending guided wave monitoring method for early warning of dam failure of a tailings pond. Background technique [0002] The tailings pond is a place where mines store tailings and waste water left after ore crushing and selection. It is an industrial structure under construction. With the continuous mining of the mine, its height will continue to flow in with the discharge of tailings and waste water. increase, which is a source of danger with increasing potential energy. The dam body of the tailings pond is composed of an initial dam and an accumulation dam. The accumulation dam is formed by the accumulation of tailings and belongs to a loose medium accumulation body. As the height of the dam body increases, accumulation sub-dams are formed one by one. Caused by accumulation sub-dam damage. Accumulation dams are different from common rock slopes in that there is a...

AI Technical Summary

Problems solved by technology

However, this monitoring method has the following disadvantages: there is no clear specification on how to determine the layout of monitoring points; there is no clear specification on how much the coordinates of the monitoring points will change before the tailings dam will collapse; it is easily affected by the geographical climate environment and the monitoring accuracy is reduced

This method has the following disadvantages: there is no clear specification for the spacing (gauge length) and embedding depth of the sensors; the monitoring means are only for monitoring individual indicators of the monitoring points; there is no clear specification standard for the displacement and dam failure indicators

This method exists: video transmission is limited by communication signals; the monitoring room needs to have a large-capacity hard disk server; external interference can easily cause poor video quality

[0006] Practice has proved that acoustic signals are generated during the tailings dam sliding and breaking process, but due to the small signal generated, large propagation attenuation inside the dam body, and inconvenient installation of sensor probes, acoustic technology has not been applied to tailings dams Dam Safety Monitoring

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