Short-distance coal seam group fire treatment method

Abstract

The invention relates to a short-distance coal seam group fire treatment method. The method comprises the following steps that: a colloidal isolation zone is established in a 2<-2> coal goaf between acoal mine boundary and an open-air stripping area; with the radon measure technique for fire exploration, a possible high temperature abnormal area in the 2<-2> coal goaf in a coal well field is detected; inert gas is injected into a borehole formed in the top 2<-2> coal goaf through a coal mine 3<-1> coal roadway; closed wall management is carried out on a working face of the exploited area of the 3<-1> coal roadway; CO gas is observed through the borehole formed in the top 2<-2> coal goaf through the 3<-1> coal roadway; and emergency preparation for preventing the sudden influx of CO intothe production working face is established. According to the short-distance coal seam group fire treatment method provided by the invention, on the basis of the analysis of the overall management thought of external isolation, internal extinction, and pressure equalization prevention and control for the 2<-2> coal goaf, occurrence of major malignant accidents such as mine fires and gas explosionscan be controlled and reduced.

Description

Technical field: [0001] The invention relates to the technical field of fire prevention and control in goafs of coal mines, in particular to a fire control method for short-distance coal seam groups. Background technique: [0002] Due to the small distance between the upper and lower coal seams, the close coal seam is greatly affected by mining. During the mining process of the lower coal seam, after the initial pressure and collapse of the old top, periodic pressure and collapse occur, causing the top rock formation to produce caving zones, fissure zones and overall movement zones, which are called rupture zones. The collapse of the rock mass at the top of the lower coal seam produces a large number of fissures, making the fissures in the caving zone and the fissure zone the main channel for air seepage, and the upper coal seam has sufficient oxygen supply, which easily causes spontaneous combustion of the coal seam. [0003] According to the relevant personnel of the coal...

AI Technical Summary

Problems solved by technology

After the implementation of these measures, the effect of fire area control is not obvious, because the cause of the fire hazard cannot be determined, so prevention and treatment cannot be carried out