METHOD OF COAL MASS SEALING FOR REDUCTION OF AIR FLOW TO SOURCES OF COAL SELF-HEATING Russian patent published in 2019 - IPC E21F5/18 

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used for prevention of endogenous fires. Disclosed is coal massif sealing method to reduce airflow to self-heating seats of coal, in which non-combustible heat-resistant glue without filler is used. At that, injection of packer into the coal massif is carried out through bore pits drilled in the coal massif, a component of inorganic incombustible heat-resistant adhesive without filler, which is a mixture of liquid sodium glass, liquid potassium glass, liquid lithium glass. Said glue component enters and fills the micropores, pores, micro cracks, cracks, cavities in the coal massif, then under effect of temperature from self-heated coal solidification of non-organic incombustible heat-resistant adhesive without filler directly occurs in micropores, pores, microcracks, cracks and cavities in coal massif over time. After hardening, inorganic incombustible heat-resistant adhesive without filler completely fills micropores, pores, micro cracks, cracks, cavities, which are injected, eliminates contact of coal with air, thus reducing coal sorption surface, excluding air flow through cracks and cavities from active mine working into coal massif to coal self-heating zones. In addition, simultaneously with delivery of a component of an inorganic nonflammable heat-resistant adhesive without filler, which is a mixture of liquid sodium glass, liquid potassium glass, of liquid lithium glass, water solution of urea is pumped into the same packer with application of mixer installed before packer, in ratio of volume of water solution of urea to volume of liquid glass, equal from 1:4 to 1:1.

EFFECT: increased sealing of coal massif due to elimination of air flow to sources of self-heating of coal.

4 cl, 4 dwg