Özet:

Underground mineshaft compartments with non-effective ventilation and heat output from mining facilities form an unfavourable microclimate that negatively affects the efficiency of work and the health of miners. Studies of the actual state of the microclimate conditions in the drainage units of the Kryvbas mines show that when two or three pumping units operate simultaneously, the air temperature in them reaches 36-38°C and the air velocity fluctuates within 0.2–0.3 m/s. Removal of warm air from the pumping unit is aggravated by lack of special ventilation openings and drop of pressure at the inlet and outlet of the unit. To solve the problem of normalizing the microclimate in underground mine compartments with operating facilities, we modelled mathematically the process of cooling with the help of a pneumatically-vortex device (PVD). The mathematical model describes changes in thermal and physical properties of the cooled air stream formed by the PVD as well as allows determining its basic parameters – long range xmax=34.9 m and diameter 2rmax=12.58 m – and studying the temperature field of the stream. We have used the mathematical modelling to develop a program of regulating the microclimate in underground mine compartments that are provided with heat sources. The model is coded in the programming language Visual Basic for Applications Microsoft Excel and has a simple interface. The use of this program allows adjusting the parameters of the microclimate in mineshaft compartments in two modes – Airing and Cooling – with an optimal use of the compressed air and ventilation air. The research findings presented in the article have been introduced in industrial conditions – in the pumping units of the Lenin Mine PJSC Kryvbaszalizrudkom and the Artem Mine PJSC ArselorMittal Kryvyi Rih (Ukraine). Author Biography Daria Lapshina, Kryvyi Rih National University 37 Pushkin str., Kryvyi Rih, Ukraine, 50002 Postgraduate student Department of Mine Aerology and Labor Safety 

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