Frequency spectrum recognition method for groundwater runoff dynamic information

Abstract

The invention discloses a frequency spectrum recognition method for groundwater runoff dynamic information, and the method comprises the steps: receiving a natural electric field signal through a detection instrument; carrying out refining and obtaining 256 spectrum lines with the analysis bandwidth f1-f2 and the resolution delta f; obtaining a judgment whether there is groundwater runoff dynamic information or not through a maximum spectrum line discrete criterion, a frequency spectrum energy concentration criterion, a pole frequency spectrum line search criterion and a dynamic information recognition criterion, and correspondingly giving the amplitudes and frequencies of main frequency information and dynamic information. The method starts from the research of the forming mechanism of the groundwater runoff dynamic information, employs a rule of combining the signal modulation principle and side frequency characteristics to automatically recognize the groundwater runoff dynamic information in a refined spectrum, gives full consideration to the impact from interference factors, can enable the recognition accuracy of the groundwater runoff dynamic information to reach 90% or more, and solves a problem that a conventional geophysical prospecting method is difficult to recognize the groundwater runoff dynamic information.

Description

technical field [0001] The invention belongs to the analysis technology of geophysical prospecting results, in particular to a frequency spectrum identification method used for analysis of underground runoff dynamic information. Background technique [0002] Underground runoff, also known as groundwater runoff or underground runoff water, is the flow of groundwater in the natural land water cycle under the action of gravity. Underground runoff is the groundwater flow that flows from a high water head to a low water head in a rock medium, and it mainly flows through connected gaps such as fault zones. The flow takes away the material in the gap, and scours the fault zone, which affects the stability of buildings on the fault zone and the safety of mines. It is one of the key issues in mine water prevention and groundwater exploration to master the type and characteristics of underground runoff channels and quickly and effectively detect their locations. [0003] As a worldw...

AI Technical Summary

Problems solved by technology

In the existing geophysical prospecting methods, although the existence of underground runoff dynamic information has been found, there are few researches on its identification and judgment methods. At present, it mainly relies on manual image identification, which has the disadvantages of low efficiency and great influence of human factors.

Whether an analysis method can be invented to distinguish underground runoff from underground solid mineral resources has not been solved by the scientific and technological circles at home and abroad, and there are no relevant research results and product reports.

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