Number № 20

Dobrynina N.Yu.¹, Ph.D. of Chemical Sciences; Vatolina N.D.², Ph.D. of Chemical Sciences, Docent; Vatolin A. N.², Holder of an Advanced Doctorate (Doctor of Science) in Chemical Sciences, Full Professor
¹Ural Institute of State Fire Service of EMERCOM of Russia
²Ural Federal University

This article presents the results of studies of the nickel cations diffusion mobility in an equimolar potassium borosilicate melt, which is the basis of ground enamel for insulating main pipelines. It was found that in the region of nickel oxide solubility (up to 3.0 wt% NiO), the diffusion coefficients changed by 2-4 orders of magnitude depending on the study temperature, which is explained by polymerization-depolymerization reactions in borosilicate melt.

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Koksharov A.V., Ph. D. of of chemical Sciences, Docent; Gaynullina E.V., Ph. D. of technical Sciences, Docent; Kondratieva M.L., Ph. D. of of chemical Sciences
Ural Institute of State Fire Service of EMERCOM of Russia

The thermal stability of foam containing silicon oxide, aluminum oxide, and talc powders was studied in this paper. It was found that introducing the powder into the foam significantly decreases its destruction rate under temperature conditions. Increasing the foam stability contributes to the accumulation of liquid and powder on its surface, which are formed as a result of the upper foam layer destruction and shield heat flows.

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Agarkov A.V.
NIIGD «Respirator»

An overview of the parameters of the improved system for remote control of the gas situation during the elimination of fires in coal mines, as well as its design features and methods of application by the units of the mine rescue service is presented. It is indicated that the improved system makes it possible to control the gas situation by remote sampling of fire gases along the height and cross-section of mine workings at a safe distance, as well as to reduce the accumulation of condensate in the sampling pipeline and dry the air sample for the purpose of reliable express analysis of its gas concentrations.

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Nazarov A.A.; Baturo A.N., Ph.D. of Engineering Sciences, Docent; Martinovich N.V.; Tatarkin I.N.
FSBEE HE Siberian Fire and Rescue Academy EMERCOM of Russia

The dependence of the consequences of fires on the time of arrival of the first fire Department is considered. The existing features of determining the location and arrival time of fire departments are considered. Approaches to optimizing algorithms for determining the arrival time of the first fire Department are proposed. The proposed approaches are based on categorization of exit areas and software based on map services. The positive and negative aspects of the methods are considered.

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Malchikov K.B.; Kozhevin D.F., Ph.D. of Engineering Sciences, Docent; Korobeynikova E.G., Ph.D. of Chemical Sciences, Docent
Saint Petersburg State University of the Ministry of Emergency Situations of Russia

The paper reflects the influence of various factors on the height of the flame of solid combustible substances and materials, as well as the need to develop a method for determining this geometric parameter. Existing combustion methods for determining the geometric parameters of fires objectively reflect only the combustion process of combustible gases and liquids, since the height of the flame of such fires depends on the characteristic size of the fire source and the rate of entry of the combustible component in the reaction zone of combustion, which remain relatively constant over a long time. Combustion process of solid substances and materials is more complex and multi-faceted, so that the specific mass burn-up rate, and, accordingly, the height of the flame of such substances are not constant and depend on many additional factors.

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Amelchugov S.P.^1,2, Holder of an Advanced Doctorate (Doctor of Science) in Engineering Sciences; Shubkin R.G.², Ph.D. of Engineering Sciences; Amelchugova S.V.¹, Ph.D. of Engineering Sciences; Elfimova M.V.², Ph.D. of Engineering Sciences, Docent; Nikulin M.A.^3
1Siberian Federal University
²FSBEE HE Siberian Fire and Rescue Academy EMERCOM of Russia
³State Agrarian University of the Northern Trans-Urals

The article discusses the existing problem of the stability of buildings on permafrost soils, gives examples of existing foundations on permafrost soils in Norilsk, considers the problem of bored piles of foundations, makes an assumption that in the junction of monolithic and precast reinforced concrete piles, soils change their mechanical properties.

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