A channel wave seismic fine detection method in the stress concentration area of ​​the working face

Abstract

The invention discloses a channel wave seismic fine detection method in a stress concentration area of ​​a working face, belonging to the technical field of coal mine geological disaster prediction. It solves the problem of prediction and prediction of geological disasters in the high stress area of ​​the working face in the prior art. The methods used include: drawing the whole process curve of stress-wave velocity change through the test of longitudinal wave and shear wave velocity under the loading condition of coal and rock mass, and performing linear and nonlinear formulas in stages; The magnitude of the ground stress in the normal area of ​​the working face; the longitudinal wave and shear wave velocity of the coal and rock mass in the normal area of ​​the working face are estimated; according to the physical parameters of the coal and rock mass in the working face, a three-layer symmetrical medium model is established, and the characteristics of the theoretical dispersion curve of the channel wave are analyzed through numerical calculation; The transmission channel wave data collected on-site and its time-frequency analysis, drawing the measured time-frequency curve and other steps. The invention can better predict and forecast coal mine geological disasters.

Description

technical field [0001] The invention belongs to the technical field of coal mine geological disaster prediction, and in particular relates to a new method for fine channel wave seismic detection in a stress concentration area of ​​a working face. Background technique [0002] With the massive mining of coal resources, shallow resources are gradually exhausted, and the mining depth of coal seams increases year by year, and the in-situ stress also increases. For mines with complex geological structures, due to the superposition of multi-stage tectonic movements, large tectonic stress will also be generated. High stress will have a great impact on the excavation and maintenance of the roadway, the excavation of the chamber and the recovery of the working face, and even hinder the normal production. At the same time, when encountering these high-stress areas during mine excavation, roadway deformation and roof collapse are very likely to occur, resulting in crushing accidents, ...

AI Technical Summary

Problems solved by technology

High stress will have a great impact on the excavation and maintenance of the roadway, the excavation of the chamber and the recovery of the working face, and even hinder the normal production

At the same time, when encountering these high-stress areas during mine excavation, roadway deformation and roof collapse are prone to occur, resulting in frame crush accidents, equipment damage, and even casualties, resulting in huge economic losses.

[0003] At present, there is no effective prediction method in the prior art for geological disasters in high-stress areas of working faces

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