Minieiev S.P., Samokhvalov D.Yu., Kostrytsia О.О., Lysnyak S.S., Filatyeva E.M., Shypovskyi I.Ye. Some issues of monitoring and determining the category of gas activity of coal mines of Ukraine
- Details
- Parent Category: Geo-Technical Mechanics, 2021
- Category: Geo-Technical Mechanics, 2021, Issue 157
Geoteh. meh. 2021, 157, 119-130
https://doi.org/10.15407/geotm2021.157.119
SOME ISSUES OF MONITORING AND DETERMINING THE CATEGORY OF GAS ACTIVITY OF COAL MINES OF UKRAINE
1Minieiev S.P., 2Samokhvalov D.Yu., 1Kostrytsia О.О., 3Lysnyak S.S., 4Filatyeva E.M., 4Shypovskyi I.Ye.
1Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Science of Ukraine, 2Office of State Labor of Ukraine, 3SPMS of Ukraine, 4Volodymyr Dahl East Ukrainian National University
UDC 622.831.325
Language: Ukrainian
Abstract. In the paper, the problems of performing mining operations in the mines with high content of gas in the seams are discussed. In the course of their mining, methane and other gases release, which are capable to burn and, together with air, can form explosive mixtures. Depending on the nature and intensity of methane emissions, it is necessary to undertake a set of additional measures in order to ensure explosion and fire safety in the underground space. Therefore, to carry on mining operations in the coal mines, it is obligatory to specify gas composition in the mine air and give the mine a category by methane. During these works, the following should be determined by means of the stationary automatic equipment and devices of periodic action: composition, rate, temperature and humidity of air and content of methane and carbon dioxide. Special attention should be focused on the control and detection of local accumulations of methane in the mine workings and in the seams. The local accumulations are especially relevant because workings in mines are usually ventilated by turbulent air streams. However, methane released in the working is mixed with air not immediately but after some time and at a certain distance from the source of methane release where its concentration in the cross section is equalized.
As a result of monitoring and research carried out, a refined measurement procedure was provided for determining gas content in the coal seam and assigning a mine an actual category by methane. The results of checking gas content of some mines in Ukraine and assigning them a category by methane are presented. Besides, aerodynamic state of the coal massif was studied, assessed and provided with detailed explanations. As an example, some elements of calculations of the methane content in the Almaznaya Mine, Dobropolskoye Company of the DTEK “Dobropillyavugillya” for the year 2021 is considered. Since 2019, the Almaznaya Mine was classified as a mine with extremely high content of methane with emissions of 16,34 m3/t per 1 ton of dry ash-free mass Today, a seam l1 in the 3rd north longwall, horizon 550 m, is being developed. The seam l1 is explosive by coal dust and not prone to spontaneous combustion. In addition, telemetric data on the 1st north longwall of the seam l1, horizon 550 m, for August, 2020, are presented.
Keywords: monitoring, methane, coal seam, mine category by methane, gas content, explosion and fire safety.
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About the authors:
Minieiev Serhii Pavlovych, Doctor of Technical Sciences (D.Sc.), Professor, Head of Department of Pressure Dynamics Control in Rocks, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Science of Ukraine, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
Samokhvalov Dmytro Yuriiovych, Master of Science, Head of Mining Supervision Department in Donetsk Region.
Kostrytsia Andrii Oleksiiovych, Doctoral Student, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Science of Ukraine, Dnipro, Ukraine.
Lysnyak Sergii Sergiiovych, Master of Science, Deputy Chief of the 10th Detachment SPMS of Ukraine.
Filatieva Elvira Mykolaiivna, Doctoral Student, Volodymyr Dahl East Ukrainian National University, Ukraine.
Shipovskyi Ivan Yevgenovych, Candidate of Technical Sciences (Ph.D.), Doctoral Student, Volodymyr Dahl East Ukrainian National University, Ukraine.
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 Minieiev S.P., Samokhvalov D.Yu., Kostrytsia О.О., Lysnyak S.S., Filatyeva E.M., | 632 kB |