Acoustic detection method and system for the location of high-temperature fire areas in goafs in underground coal mines

Abstract

The invention provides an acoustic detection method and an acoustic detection system for a high-temperature fire area position of a mine goaf under a coal mine shaft, and relates to the technical field of mine safety, in particular to a method for judging a high-temperature abnormal area position by utilizing an acoustic signal produced by coal-rock mass warming and coal spontaneous combustion ofthe mine goaf. The acoustic detection method comprises the steps of determining the optimum frequency of the received acoustic wave signal, arranging acoustic sensor measuring points, computing an acoustic wave signal strength average value of each measuring point in real time so as to judge a spontaneous combustion danger level, judging a change tendency of the spontaneous combustion danger levelthrough analyzing a change slope of acoustic wave strength, carrying out inversion of a spontaneous combustion coal seam high-temperature fire area position through a Kriging interpolation method, and realizing the positioning of the high-temperature fire area position. The method is implemented through the acoustic detection system. The acoustic detection system comprises an acoustic sensor module, a digital monitoring and transmitting module, an acoustic data analysis module, a storage module and a display module. The high-temperature abnormal area of the mine goaf is determined rapidly atlow cost and with high precision, and the method and the system are applied to analyzing a generation and development process of spontaneous combustion of a coal seam.

Description

technical field [0001] The invention relates to the technical field of mine safety, in particular to an acoustic wave detection method for the position of a high-temperature fire area in a goaf underground in a coal mine, and an acoustic wave detection system for realizing the method. Background technique [0002] Spontaneous combustion of coal is due to the phenomenon of spontaneous combustion of coal during mining, storage and transportation. The hazards of coal spontaneous combustion are very serious, and coal-producing countries in the world are threatened by coal spontaneous combustion to varying degrees. According to statistics, more than 56% of coal seams have the characteristics of spontaneous combustion, which poses a major threat to underground production safety. In addition, it is difficult to extinguish fires due to spontaneous combustion of coal seams. The total amount of coal lost due to spontaneous combustion of coal seams exceeds 10 million tons per year. [...

AI Technical Summary

Problems solved by technology

At present, there is no detection method that uses sound waves to determine the location of high-temperature fire areas in goafs in underground coal mines.

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