A longitudinal guided wave monitoring method for early warning of tailings dam dam failure

Abstract

The invention discloses a longitudinal guided wave monitoring method for early warning of dam failure of a tailings pond. The method includes step 1: on the basis of fully analyzing the existing engineering data and conducting geological surveying and mapping investigation, determining the position of the monitoring point along the span direction of the accumulation dam; step 2: drilling a pre-embedded waveguide array at the position of the monitoring point; 1 ) Drilling and pre-embedding PVC pipes at the monitoring points; 2) selection of waveguides; 3) determining the number N of waveguides; 4) placing the waveguides at the center of the PVC pipe; 5) The orifice is tightly plugged with a rubber stopper; Step 3: installation of the longitudinal guided wave sensor; Step 4: establishment of a signal collection base station; Step 5: signal collection; Step 6: analysis and processing of data. The longitudinal guided wave monitoring method for early warning of tailings dam dam failure provided by the present invention has the advantages of low labor cost, all-weather automatic monitoring, simple and easy operation of the monitoring method, simple data analysis, less error factors and high detection accuracy .

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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