Abstract:
In order to solve the fire control problems of the gob overlying the shallow, spontaneous combustion, short distance and near horizontal coal seams, taking the coal spontaneous combustion of the gob overlying the 22305 working face of Bulianta Coal Mine of Shendong Coal Group of State Energy Investment Group as an example, the comprehensive fire control and extinguishing technology, such as air leakage control technology, inerting technology in the fire area, coal resistance technology, heat absorption and cooling technology are adopted, that is, the “U” and “Y” working face are used for equal-pressure ventilation, plugging up and down the well, filling in inert gas, fly ash and other comprehensive fire-fighting measures. The results show that the concentration of toxic and harmful gases in the gob is greatly reduced, the concentration of oxygen is reduced, and the effect of inert cooling is obvious; under the reasonable allocation of people, machinery, storage and transportation, the advancing speed of the working face is accelerated, the recovery rate is increased, the air leakage and oxygen supply in the overlying gob are reduced, the inerting process of the overlying gob is accelerated, and the threat of spontaneous combustion is reduced.