TY JOUR TI IMPROVING THE EFFICIENCY OF SUBSURFACE EXTINGUISHING OF TANKS WITH OIL PRODUCTS KW tank KW fire KW air and mechanical fire-extinguishing foam KW subsurface extinguishing method of oil and oil products KW extinguishing time KW mathematical model JO Problems of risk management in the technosphere AU Minkin, D.Y. AU Malashenko, S.M. AU Smilovenko, O.O. PY 2016 IS 2016 PB Saint-Petersburg University of State Fire Service of Emercom of Russia