IMPROVEMENT OF CRITERION OF SAFETY LEVEL ESTIMATION OF WASTES STORAGE PLACES

Abstract

Fires at places of storage of big amounts of solid household wastes are extremely dangerous due to possibility of catastrophic landslides. As it is seen from the results of analysis of extreme situations statistics for wastes storage places the consequences of such events may come out of the limits of the object and bring down serious damage for the natural environment. The aim of the represented work is to investigate the influence of factors of fire taking place at wastes storage place on fire resistance of anti-landslide construction. To achieve the stated aim the peculiarities of extreme situations development at wastes storage places are analyzed. Interconnection between factors of fire impact and extinguishing mode parameters is shown. It is represented with the occurrence of the complex strengthstrain condition in anti-landslide construction elements which is defined with the combination of compression in longitudinal direction caused by thermal deformations and bending in transverse direction caused by loading of wastes mass and remains of fire extinguishing mixture delivered into combustion zone. Taking into account the behavior of materials in dynamics of fire extinguishing mode variation the conditions of anti-landslide construction elements are defined. Considering stated strength conditions of anti-landslide construction elements the improved criterion of safety level estimation is proposed for simulation modelling of safety management system of wastes storage place. Proposed formalization of strength conditions for antilandslide construction element gives the opportunity to analyze its behavior at complex thermal mode and variable loading on separate locations at extreme situation passing same as during its liquidation on the territory of wastes storage place.