Detection method for concealed fault nature of working face based on reflected in-seam waves

Abstract

The invention discloses a detection method for the concealed fault nature of a working face based on reflected in-seam waves. The way of separately arranging multiple detectors in combination with multiple motivating drill holes in roadways on two sides is used, each drill hole in the roadway on each side is sequentially motivated at intervals to serve as multiple earthquake origins; the multipledetectors separately receive reflection in-seam waves for many times, an earthquake host acquires a position relation between two discs of an internal fault plane according to reflected in-seam wave signals received for many times and the position relation between the motivating drill holes and the detectors; and displacement in the horizontal direction and displacement in the vertical direction of the two discs of the fault plane are finally acquired after three-dimensional modeling and meshing subdivision and displayed on a three-dimensional model. According to the method provided by the invention, the detection roadway is not needed to be additionally arranged, the relative displacement between the two discs of the fault plane can be accurately measured through detecting the reflected in-seam waves, and thus the blind fault in the working face is displayed in a transparent manner.

Description

technical field [0001] The invention relates to a method for detecting the property of a hidden fault in a mining face, in particular to a method for detecting the property of a hidden fault in a mining face based on reflection channel waves. Background technique [0002] Due to the characteristics of my country's national conditions of "rich in coal, low in gas, and poor in oil", coal will occupy a dominant position in my country's energy production and consumption and will not change for a long time. With the advancement of safe mining and intelligent mining in coal mines, the structure in the working face, especially the fault, has a huge impact on the intelligent and safe mining of the working face. The faults visible to the naked eye in the working face can be directly described in detail by geological means, but when there are faults in the working face that have not been identified, when the shearer directly passes through the hard rock zone between the two plates of ...

AI Technical Summary

Problems solved by technology

However, the previous methods can only delineate the possible location of anomalies (i.e. hidden faults) in the working face based on the inversion of instrument detection data, and cannot accurately judge the fault drop and the distance between the two fault plates.

This defect makes it necessary for the explorers to arrange additional exploration lanes or boreholes in order to find out the nature of the fault and the specific relationship between the two plates. The thickness of the fault filling is determined by drilling cores or exploring the width of the rock through exploration lanes, which increases the workload and Affect the production schedule

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