FIELD: mining industry.
SUBSTANCE: invention relates to the mining industry, in particular to the repair of ventilation facilities in underground workings of coal and shale mines. Method of repairing a ventilating insulating structure in coal and shale mines consists in that the materials for restoring the airtightness of the ventilating structure are applied layer by layer. In this case, each layer consists of a single material, and the materials from which the layers are made, different in composition: mineral; polyurethane foams, differ in properties: curing speed and subsequent air tightness; curing speed and subsequent water resistance.
EFFECT: technical result consists in an effective sealing of the insulating bridge in coal and shale mines located in the second limiting state.
1 cl, 2 dwg
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