ENSURING HEALTHY AND SAFE WORKING CONDITIONS IN BREAKAGE FACE WITH DIRECT-FLOW VENTILATION SCHEME
Spatayev N.D. Sattarova G.S. Nurgaliyeva A.D. Balabas L.Kh. Batessova F.K.
2023National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2023#2023Issue 2177 - 187 pp.
One of the most dangerous production factors of coal enterprises is the methane gas emission when performing technological processes for the extraction of coal seams. This hazardous production factor is directly related to the risk of gassing underground mine workings. Such an aero-gas situation can lead to ignition, and further explosion of the methane-air environment that will lead to significant human and material losses. In order to ensure safe working conditions in coal mines, it is necessary to organize and to ensure ventilation of all mine workings. However, not all methods of controlling gas evolution are effective. To solve this problem, the authors of this paper propose to take into consideration the leakage of air supplied to the breakage face through the collapsed coal-rock massif of the mined-out space when controlling gas emission of the extraction area. For this purpose, there was studied the stope and the supported ventilation working gas state, depending on the conditions of ventilation and air leakage through the mined-out area of the longwall face. In addition, the aerodynamic parameters of the stope and maintained workings and the dynamics of air leaks through the worked-out space massif were studied. There were carried out experiments in the mines of the Karaganda region, where, alongside with the adverse ventilation scheme, the direct-flow ventilation was also used. Thus, this paper presents the results of studies of the aero-gas-dynamics features for extraction areas with the straight-through ventilation scheme of the stope. As a result of the research, a quasi-network model of the production area was built and an algorithm was developed for determining air leaks through the collapsed massif of mined-out space.
air leaks , depressions residuals , quasi-network model , straight-through ventilation scheme , worked-out space
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Department of Mine Aerology and Occupational Safety, Abylkas Saginov Karaganda Technical University NJSC, Ave. Nursultan Nazarbayev, 56, Karaganda, 100027, Kazakhstan
Department of Engineering Systems and Networks, Satbayev University, 22a Satpaev Street, Almaty, 50013, Kazakhstan
Department of Mine Aerology and Occupational Safety
Department of Engineering Systems and Networks
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