Longitudinal guided wave monitoring method for tailings pond dam body brake early-warning

Abstract

The invention discloses a longitudinal guided wave monitoring method for tailings pond dam body brake early-warning. The method comprises the following steps: step one, determining a monitoring pointlocation along a fill dam span direction on the basis of sufficiently analyzing the existing engineering document and performing geological survey; step two, pre-embedding a waveguide rod array at a monitoring point location drill hole; 1) pre-embedding a PVC pipe at the monitoring point location drill hole; 2) selecting waveguide rods; 3) determining the root number N of the waveguide rod; 4) placing the waveguide rods at a center location of the PVC pipe; and 5) plugging an orifice by using a rubber plug; step three, mounting a longitudinal guided wave sensor; step four, establishing a signal collection base station; step five, collecting the signal; and step six, analyzing and processing the data. The longitudinal guided wave monitoring method for tailings pond dam body brake early-warning disclosed by the invention has the advantages of being low in labor cost, automatic in full-weather monitoring, simple and easy in operation, simple in data analysis, less in error element and high in detection precision.

Description

technical field [0001] The invention relates to the technical field of mine construction, in particular to a longitudinal guided wave monitoring method for early warning of dam failure of a tailings reservoir. 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 ...

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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