A system and method for preventing and controlling fires in coal mined-out areas

Abstract

The embodiment of the invention discloses a system and method for preventing and controlling fires in coal mined-out areas, which relate to the technical field of coal mining research and can improve the fire prevention and control effect in the entire coal mined-out areas. The system includes a drag pipe inert injection device, which is used to inject inert gas into the goaf on the air inlet side; an inert injection device on the ground, used to inject inert gas into the goaf on the air return side; a data acquisition device on the air inlet side, Used to collect the first temperature and the first index gas concentration in the goaf on the air inlet side; the data acquisition device on the return air side is used to collect the second temperature and the second index gas concentration in the goaf on the return air side; data The processing device, the above-mentioned devices are connected respectively, is used to control the inert injection speed of the drag pipe inert injection device according to the first temperature and the first index gas concentration, and is also used to control the inert injection speed according to the second temperature and the second index gas concentration. Controlling the inert injection speed of the ground drilling inert injection device. The invention is mainly used for preventing and controlling fires in coal mined-out areas.

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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