METHOD OF VENTILATION OF EXCAVATION SECTION DURING INVERSE ORDER OF DEVELOPMENT Russian patent published in 2003 - IPC

FIELD: mining industry, ventilation of excavation sections of mines. SUBSTANCE: invention deals with ventilation of excavation sections in mines, for instance, potassium mines during inverse order of their development. Technical result of invention lies in reduced extent of preparation work and diminished operational expenses thanks to change of way of flow of contaminated air within limits of excavation section. With this in mind part of fresh air from main transportation gallery is fed over excavation panel heading and contaminated air is removed over deepened conveyer-ventilation drift. Ventilation bridge is set in excavation heading behind working chambers and contaminated air is removed from working chambers with the use of ventilation connections and developed chambers. Used air can be also removed through ventilation connections arranged in centers of length of chambers and remaining blind alleys of chambers can be ventilated with the help of local ventilation fans. Chambers can be also ventilated by means of local ventilation fans and contaminated air is then removed over conveyer-ventilation drift. EFFECT: reduced extent of preparation work and diminished operational expenses. 2 cl, 3 dwg