System and method for preventing and controlling coal goaf fire

Abstract

The embodiment of the invention discloses a system and method for preventing and controlling a coal goaf fire, relates to the technical field of coal mining research, and can improve the fire prevention and control effect of the whole area of a coal goaf. The system comprises a dragging pipe inert gas injection device which is used for injecting inert gas into the goaf at the air inlet side, a ground drilling inert gas injection device used for injecting inert gas into the goaf on the return air side, an air inlet side data acquisition device used for acquiring a first temperature and a firstindex gas concentration in the goaf at the air inlet side, an air return side data acquisition device used for acquiring a second temperature and a second index gas concentration in the goaf at the air return side, and a data processing device respectively connected with the above devices and used for controlling the inert gas injection speed of the dragging pipe inert gas injection device according to the first temperature and the first index gas concentration, and also used for controlling the inert gas injection speed of the ground drilling inert gas injection device according to the secondtemperature and the second index gas concentration. The system and method for preventing and controlling the coal goaf fire are mainly used for preventing and controlling the coal goaf fire.

Description

technical field [0001] The invention relates to the technical field of coal mining research, in particular to a system and method for preventing and controlling fires in coal goafs. Background technique [0002] In the process of coal mining, as the degree of mining mechanization becomes higher and higher, the mining speed is faster and the mining intensity increases, a larger goaf is formed, and the accumulation of gas in the goaf leads to the return air flow and the working face. (Upper corner) Exceeding the limit of gas may easily cause spontaneous combustion of coal in the goaf, and may lead to a gas explosion accident in severe cases, which not only affects the economic benefits of the coal mine, but also seriously affects the safe production of the mine. [0003] For coal spontaneous combustion in goafs, technologies such as inert injection to prevent fire extinguishing, grouting to prevent fire extinguishing, and spraying inhibitors to prevent fire extinguishing are m...

AI Technical Summary

Problems solved by technology

The current drag pipe inert injection process system is mainly installed on the air inlet side. However, due to the "O" ring effect in the goaf, it is difficult for the inert gas injected by the hosting to diffuse to the air return side area, resulting in the mining area in the air return side area. The inerting effect of the goaf is not good, which causes the problem of poor fire prevention and control in the whole area of ​​the goaf

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