TY JOUR TI THEORETICAL MODELING AND CALCULATION OF THE EFFECTIVENESS OF USING A VAULT BREAKER IN A BUNKER KW arch breaker KW loosening of the material KW hopper KW arching KW working body KW structural and operational parameters KW loosening JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Kozhevnikov, V.A. PY 2026 IS 11 PB Belgorod State Technological University named after V.G. Shukhov