A control method for controlling oxygen suffocation in the shallow part of coalfield fire area where mine fire and surface fire coexist

Abstract

The invention discloses a mine fire and surface fire coexistence coalfield fire area shallow part oxygen-controlling suffocation treatment method, and belongs to the technical field of coalfield firearea treatment. The problems that in the prior art, the stripping engineering quantity is large, the drilling construction quantity is large, the water slurry filling quantity is large, consequently the construction period is long, and efficient treatment is difficult are solved. The method comprises the following steps: S1, the surface of a fire area is locally stripped to form a step-shaped working platform; S2, filling materials are injected into shallow part treatment drilling holes to fill a cavity area; S3, a high-temperature area of a shallow part of the fire area is cooled on the platform; S4, after the overall temperature of the shallow part is decreased to 100 DEG C, a cooling area of the shallow part is plugged in a layered mode, and the fire area is monitored; S5, if temperature rebound occurs, a rebound area and a boundary thereof are plugged again; and S6, if a temperature rebound phenomenon occurs again, the step S5 is repeated, and after the rebound phenomenon does notoccur, treatment is completed. The method is suitable for treatment of the mine fire and surface fire coexistence coalfield fire area.

Description

technical field [0001] The invention belongs to the technical field of coalfield fire area control, and in particular relates to a method for controlling oxygen-controlled suffocation in shallow coalfield fire areas where mine fires and surface fires coexist. Background technique [0002] Coalfield fire is a disaster caused by large-scale burning of coal seams. While burning a large amount of coal resources and emitting greenhouse gases, it also leads to the death of large areas of vegetation, and the toxic substances (such as As, F, Se, Hg, etc.) Pollution of groundwater resources. [0003] At present, the main coalfield fire areas in our country are mostly fire areas coexisting above and below the mine. This kind of fire area is mainly caused by the coal combustion in the underground goaf of the mine. The high-temperature smoke generated by the coal combustion diffuses to the surface through the communication channel, ignites the outcrop coal with a high degree of weather...

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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a method for controlling oxygen-controlled suffocation in the shallow part of the coalfield fire area where mine fires and surface fires coexist, to solve the problem of large stripping engineering, large drilling construction, and water slurry filling in the prior art. Large, resulting in long construction period and difficult efficient governance

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