On the Indicator of the Population Protection from Secondary Damaging Factors of an Explosion in Emergency Situations of a Technogenic Nature


Annotation:

An analysis of existing approaches to assessing the impact of secondary damaging factors of an explosion showed that when calculating the impact zones, only debris and fragments of equipment are considered, and the effect of flying glass fragments is not taken into account. Therefore, management bodies specially authorized to solve the problems in the field of protecting the population and territories from emergencies need to carry out a set of measures in advance to reduce the impact of secondary damaging factors of the technogenic emergencies on the population.

A method of protecting the population from secondary damaging factors of explosion is proposed, which consists in substantiating the rational parameters of building elements, in which the protection of the population from secondary damaging factors of explosion in technogenic emergencies will be maximum under existing restrictions.

The indicator of human protection from secondary damaging factors of an explosion in emergency situations of a technogenic nature means the probability of not hitting a person with glass fragments. As initial data for determining the index of protection of the population, the distribution of glass fragments by mass and the use of existing approaches to determining the degree of damage to a person by fragments are considered. Based on the graphical dependence of the degree of human injury on the speed and mass of the glass fragment, an analytical view of this dependence was obtained. Based on the previously known threshold values of the degree of human injury by glass fragments, a function of the probability of human injury was obtained. An example of determining the indicator of protection of the population from glass fragments with known initial data is given.

The application of the proposed approach will help the management bodies of the Unified State System for the Prevention and Elimination of Emergencies and Hazardous Production Facility to take measures in advance to minimize the consequences of human injury by secondary damaging factors of the explosion, as well as to justify the size of sanitary protection zones.

References:
1. GOST R 22.0.02—2016. Safety in emergencies. Terms and definitions. Available at: https://docs.cntd.ru/document/1200139176 (accessed: June 9, 2022). (In Russ.).
2. Rybakov A.V., Ochetov S.L. On the assessment of the impact of secondary damaging factors of the explosion on the population in man-made emergencies. Nauchnye i obrazovatelnye problemy grazhdanskoy zashchity = Scientific and Educational Problems of Civil Defense. 2022. № 1 (52). pp. 43–49. (In Russ.)
3.  Rybakov A.V., Ochetov S.L., Tinkuev R.M. On the need of accounting the secondary factors of the explosion in an emergency of a man-made nature. Problemnye voprosy inzhenernoy zashchity naseleniya i territoriy: sb. tr. XXXI Mezhdunar. nauch.-prakt. konf. (Problems of Public and Terrain Engineering Protection. Collection of papers of the 31st International Scientific and Practical Conference). Civil Defence Academy Emercom of Russia. Khimki, 2021. pp. 71–75. (In Russ.).
4. Ge J., Li G.-Q., Chen S.-W. Theoretical and experimental investigation on fragment behavior of architectural glass panel under blast loading. Engineering Failure Analysis. 2012. Vol. 26. pp. 293–303. DOI: 10.1016/j.engfailanal.2012.07.022
5. Rybakov A.V., Ivanov E.V., Bakhtiyarova O.N. Model for assessment of the areas of exposure due to scattering of window glass fragments in case of explosions. Bezopasnost Truda v Promyshlennosti = Occupational Safety in Industry. 2019. № 12. pp. 19–23. (In Russ.). DOI: 10.24000/0409-2961-2019-12-19-23
6. Botyakov A.G. Specific features of human injuries caused by high-energy explosions in cities: thesis... Candidate of Medical Sciences. Nizhny Novgorod, 1992. 20 p. (In Russ.).
7. Methodology for assessing the consequences of emergency explosions of fuel-air mixtures. Safety guidelines. Available at: https://docs.cntd.ru/document/1200133802 (accessed: (accessed: June 21, 2022). (In Russ.).
8. Zhang X.H. Development of design and analysis methods for window structures against blast and impact loads: Ph.D. thesis. The University of Western Australia, Crawley, 2014. 
9. Fletcher E.R., Richmond D.R., Yelverton J.T. Glass Fragment Hazard from Windows Broken by Airblast. Defense Technical Information Center. Washington D.C., 1980. 40 p.
10. Glasstone S., Dolan P. The Effects of Nuclear Weapons. U.S. Department of Defense and U.S. Department of Energy, third edition. Washington D.C., 1977. 638 р.
11. Baker W.E., Cox P.A., Westine P.S., Kulesz J.J., Strehlow R.A. Explosion Hazards and Evaluation. In 2 books. Book 2. Moscow: Mir, 1986. 384 p. (In Russ.)
12. Andrieu C., de Freitas N., Doucet A., Jordan M.I. An Introduction to MCMC for Machine Learning. Machine Learning. 2003. Vol. 50. Iss. 1-2. pp. 5–43. DOI: 10.1023/A:1020281327116
DOI: 10.24000/0409-2961-2022-10-39-45
Year: 2022
Issue num: October
Keywords : explosion numerical experiment emergency indicator of population protection injury probability damaging factors glass fragments
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