Kokoulin I., Sapunova I. Principles of choosing a ventilation mode that reduces the risk of the development of an aerological emergency (on the example of a methane explosion)
- Details
- Parent Category: Geo-Technical Mechanics, 2024
- Category: Geo-Technical Mechanics, 2024, Issue 169
Geoteh. meh. 2024, 169, 153-159
PRINCIPLES OF CHOOSING A VENTILATION MODE THAT REDUCES THE RISK OF THE DEVELOPMENT OF AN AEROLOGICAL EMERGENCY
(ON THE EXAMPLE OF A METHANE EXPLOSION)
Kokoulin I., Sapunova I.
M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine
UDC 622.41/.46:622.817
Language: English
Abstract. There are no methods for assessing all parameters of methane explosion when it is in the process, so there is a high risk of untimely undertaking of measures to prevent and eliminate the explosion. In addition, the sensors for measuring parameters of the mine atmosphere included in the existing control systems do not control the lower limit of the explosive concentration of methane.
The purpose and tasks of the research are formulated. The methods by which these problems will be solved are determined.
The concept of direct and indirect emergency risk factors is formulated. Namely: the direct factors of the risk of a methane explosion are the probability of an emergency occurrence and the material damage caused by it. Indirect factors are characteristics of the emergency that can be predicted or calculated during its development. Direct factors for calculating the risk of an event are not suitable for assessing the risk of an explosion, as they cannot be determined in advance. Standard methods of risk assessment are not always sufficiently justified (it is difficult to explain to the average user the difference in the probability of danger of 10-6 and 10-5 - both are simply small), while methane accumulation, erroneous actions of the operator, etc. will be much clearer. That is, the use of indirect risk factors is more justified.
The requirements are formulated to which ventilation regime must satisfy during the elimination of an exogenous fire, which is dangerous due to the complication of a methane explosion.
A technique for optimizing the emergency ventilation mode suitable for use in these conditions is presented, and some aspects of its use are discussed. Having formulated the problem in a precise mathematical formulation, that is, having chosen a functional for minimization and having described the requirements for their solution in the form of constraints, it is possible to obtain, using a personal computer, the values of air-gas distribution during the period of explosion elimination, which satisfy the requirements of the Safety Rules in coal mines, which in the same time feasible with the main ventilation fans existing in the mine. However, it is not always possible to get a solution. For the final solution of the problem, it is necessary to involve other methods and means of ventilation control (ventilation doors, local ventilation fans, etc.).
Keywords: emergency, explosion of methane and explosive gases, method of optimizing the emergency ventilation mode, direct and indirect factors of the emergency risk.
REFERENCES
1. Oparin, V.N. and Skrytskiym, V.A. (2012), ‘’Analytical review of methane explosions in Kuzbass mines”, Coal, no. 9, pp. 20–32.
2. Kostarev, V.P. (2002), “On the prevention of methane and dust explosions and the reduction of mine explosion hazards”, Coal, no. 1, pp. 57–62.
3. Bulat, A.F., Sofiyskyi, K.K., Bokii, B.V. and Sheiko, A.V. (2016), Upravleniye aerologicheskimi i geomekhanicheskimi protsessami v ugol'nykh shakhtakh [Management of aerological and geomechanical processes in coal mines], Eastern Publishing House, Mariupol, Ukraine.
4. Minieiev, S.P. (2018), “On the prevention of emergencies associated with methane explosions in coal mines”, Coal of Ukraine, no. 1–2, pp. 50–59.
5. Kostenko, V.L., Zavialova, Ye.L., and Kostenko, T.V. (2915), “”Explosions of airborne particles during the development of methane-rich coal seams”, Pozhezhna bezpeka, vol. 26, pp. 86–96.
6. Liliana Medson-Neich, Khaver Garsia-Torrent and Givez Fernando Anez (2017), “Preventing the spread of methane and dust explosions in coal mines”, Zapiski SPb hornogo instituta, vol. 225, pp, 307–312.
7. Vasilev, A.A., Pinaiev, A.V. and Trubitsin, A.A. (2017), “What burns in the mine: methane or coal dust?”, Fizika goreniya i vzryva, vol. 53, no. 1, pp. 11–18.
8. Bulat, A.F., Fichev, A.V., Yashchenko, I.A, Krasnik, V.G., Levkin M.B., Kokoulin, I.Ye., Bunko, T.V. and Kuzmenko, M.S. (2005), Sostoyaniye tekhniki bezopasnosti i effektivnost' funktsionirovaniya protivoavariynoy zashchity ugol'nykh shakht [The state of safety engineering and the efficiency of emergency protection in coal mines], Dnipropetrovsk, Ukraine.
9. Sobolev, G.G. (1989), Gornospasatel'noye delo [Mine rescue], Nedra, Moskow, USSR.
10. Potemlin, V.Ya., Kozlov, Ye.O. and Kokoulin, I.Ye. (1991), Avtomatizatsiya sostavleniya operativnoy chasti planov likvidatsii avarniy na shakhtakh i rudnikakh [Automation of the preparation of the operational part of plans for the elimination of emergencies in mines and quarries], Tekhnika, Kyiv, Ulraine.
11. Abramov, F.A., Tuan, R.B. and Potemkin, V.Ya. (1971), Vozdukhoraspredeleniye v ventilyatsionnykh setyakh shakht [Air distribution in mine ventilation networks], Naukova dumka, Kyiv, USSR.
12. Ministry of Coal Industry of Ukraine (2010), NPAOP 10.0-1.01-10 Pravyla bezieky u vugilnykh shaknyakh [NPAOP 10.0-1.01-10Safety rules in coal mines], Osnova, Kyiv, Ukraine.
13. Kamynin, Yu.M. and Kamynin, V.A. (2000), “Automatic three-level protection system for mines against methane explosions”, Sbornik nauchnyh trudov: Vzryvozashishennaya svyaz i avtomatizaciya na ugolnyx predpriyatiyah [Collection of scientific papers: Explosion-proof communication and automation at coal enterprises], pp. 47–51.
About the authors:
Kokouln Ivan, Candidate of Technical Sciences (Ph.D), Senior Researcher, Senior Researcher in Department of Mineral Mining at Great Depths, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID 0000-0002-3888-8119
Sapunova Iryna, Candidate of Technical Sciences (Ph.D), Senior Researcher, Senior Researcher in Department of Mineral Mining at Great Depths, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID 0000-0001-5713-1624