TY JOUR TI EVALUATION OF THE THERMAL EFFECTS OF FIRE REGARDING SUBWAY TRAINS IN A DUAL-TRACK SUBWAY TUNNEL KW dual-track tunnel KW subway KW fire KW heat flux KW temperature JO Problems of risk management in the technosphere AU Vagin, A.V. AU Danilov, A.I. AU Sivakov, I.A. PY 2015 IS 2015 PB Saint-Petersburg University of State Fire Service of Emercom of Russia