FIELD: mining.
SUBSTANCE: present invention pertains to mining and particularly to safety precautions during extraction of seams liable to spontaneous ignition, by long pillars along the strike. The method involves forced draft and exhaust ventilation with tapping off part of the outgoing current along the airway in the direction of motion of the working face. Air permeability in loose ground at the end of the airway is reduced. The remaining part of the outgoing current is channelled along wellholes in the section of the airway between the line of the working face and its end zone. The duration of ventilating the indicated section is less than the latent period of spontaneous ignition of coal.
EFFECT: increased efficiency of prevention of spontaneous fires due to shorter duration and flow of air through the mined out space.
3 cl, 1 dwg
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