TY JOUR TI DESTRUCTION OF MATERIALS BY SHOCK WAVE CUTTING CHARGES UNDER WATER IN EMERGENCY SITUATIONS KW shock-wave charge KW bilinear charge KW mathematical model KW Mach wave KW experiment KW rock KW concrete block KW underwater explosion JO Problems of risk management in the technosphere AU Doroshenko, S.I. AU Nefedev, S.A. AU Malykh, V.A. PY 2024 IS 2023 PB Saint-Petersburg University of State Fire Service of Emercom of Russia