Coal mine underground-fire prevention method

Abstract

The invention discloses a coal mine underground-fire prevention method. The method includes a gas pressure regulating chamber and a gas monitoring system. The gas pressure regulating gas chamber connects, collects and concentrates coal mine return wind to a pressure equalizing gas chamber through pipelines. According to the gas monitoring system, a flammable-gas detector and an infrared sensor areinstalled at each monitoring point, an alarming controller is connected near the flammable-gas detector, the alarming controller is connected to a fan of the pressure equalizing gas chamber through aline conductor, and controls starting and stopping of the fan of the pressure equalizing gas chamber, and the alarming controller and the infrared sensor are remotely connected to a control computerthrough a manner of wireless communication. The method has the advantages that the pressure equalizing combination gas chamber is taken as a main body, all pressure regulating and detection in a mining area are concentrated into one place, and are centrally managed, the purpose of reducing personnel and improving efficiency can be achieved, and a comprehensive fire prevention and extinguishing measure integrating facility maintenance, installation, detection, prevention and control into one body thoroughly eliminates mining area fire prevention and extinguishing hidden-troubles.

Description

technical field [0001] The invention relates to the field of preventing and controlling coal spontaneous combustion in coal mines, in particular to an underground coal mine fire prevention method. Background technique [0002] In the mining method of full mining in coal mines, sometimes two-inlet and one-return ventilation are adopted, the track in the second mining area, pedestrians in the second mining area go down the mountain to enter the wind, and the belt in the second mining area goes down the mountain to return the air. The working face is arranged by the longwall mining method, and the full height is mined at one time, and the roof is managed by the roof caving method. [0003] The mining method of full mining is adopted, and according to the setting of coal pillars in each goaf, the minimum setting of coal pillars is only 3m. With the emergence of mine pressure, it is not ruled out that the coal pillars left in the goaf are damaged, and the goafs are connected int...

AI Technical Summary

Problems solved by technology

However, this mined coal seam is a spontaneous combustion coal seam, and the probability of spontaneous combustion and fire is high. Once spontaneous combustion and fire occur in the goaf, it is difficult to judge the specific fire location, which brings serious difficulties to subsequent fire control.