METHOD FOR REGULATION OF THERMAL CONDITIONS IN RAILWAY TUNNELS AT WINTER PERIOD Russian patent published in 1999 - IPC

FIELD: mining industry. SUBSTANCE: method relates to ventilation of mine workings and for separation of harmful substances and it also can be used for regulation of thermal conditions in railway tunnels located in regions with severe climate. According to method, outside air delivered into tunnel and into entry parallel to tunnel at no transportation facilities in tunnel is initially heated up to 2 C. Then, outside air is divided into two parts, one part is directed to entry, and other part of outside air is heated up to temperature which is determined by condition of preventing processes of creating ice covering. This temperature is determined according to relation given in description of invention, and after that air is delivered into tunnel. In case of transportation facilities present in tunnel, delivery of air into working parallel to tunnel is discontinued and entire volume of heated air is directed into tunnel following train moving ahead. Temperature of final heating is determined according to relation given in description of invention. Application of aforesaid method ensures effective ventilation of tunnel together with reduction of power cost and with creation of positive thermal conditions excluding formation of ice covering. EFFECT: higher efficiency. 1 cl, 1 dwg