DETERMINING OF PRESSURE PEAKS AT PULSE FLUID INJECTION

Details

Parent Category: Geo-Technical Mechanics, 2014

Category: Geo-Technical Mechanics, 2014, Issue 118

UDC 622.831.325:622.232.522.24:532.528

Authors:

Zberovskiy V.V. Ph.D. (Tech.), Senior Researcher (IGTM NAS of Ukraine)

Pazynich А.V., M. S. (Tech.) (IGTM NAS of Ukraine)

Polyakov Yu.Е., Doctoral Student (IGTM NAS of Ukraine)

Abstract.

With the help of modeling a hydroimpulsive action on the prone-to-outburst coal seams, interdependence between amplitude of pressure self-fluctuations and regime parameters of injection was established. Peak values of generator amplitude characteristics and corresponding values of hydrodynamic parameters are determined. Basing on the determined hydrodynamic parameters, dependence between peak amplitude of pressure self-fluctuations, cavitation parameters and  boundary values of liquid injection pressure in the coal seams is established for different modes of hydroimpulsive action. This analytical method for calculating dynamic characteristics by cavitation generators was applied in calculations of operating parameters for generator of elastic vibrations and theoretical model of a process of the amplitude-frequency characteristics formation for the pulsed liquid injection.

Keywords:

coal seam, hydroimpulsive action, fluid, pressure, cavitation, self-vibration.

References:

 1. Ukraine Ministry of Coal Industry (2005), 10.1.001740088.011:2005. Pravyla vedennia hirnychykh robit na plastakh, skhilnykh do hazodynamichnykh yavlyshch: Normatyvnyu dokument Minvuhlepromu Ukrayiny. Standart [10.1.001740088:2005. Rules of Mining on Layers Prone to Gas-Dynamic Phenomena. Standart], Ukraine Ministry of Coal Industry, Kyiv, Ukraine.

2. Boyko, Ya.I., Nikiforov, A.V. and Rubinskyi, A.A. (2009), “Increase of efficiency of hydro loosening of outburst-prone coal layers in development working and in niches”, Sbornyk nauchnykh trudov MakNII, no. 2 (24), pp. 52-57.

3. Zberovskiy, V.V., Pazynich, A.V., Polyakov, Yu.E., Potapenko, A.A. and Angelovskiy, A.A.(2010), “The effectiveness assessment of hydro-pulse influence by gas factor in tunnel cutting”, Geotekhnicheskaya Mekhanika [Geo-Technical Mechanics],  no. 89, pp. 126-133.

4. Zberovskiy, V.V. (2011), “Complex of measures on prevention of gas-dynamic occurrences when coal-gas deposits developing by means of active impact”, Twentieth International Symposium on Mine Planning and Equipment Selection MPES 2011: program and abstracts volume, p. 423.

5. Vasilyev, L.M. and Zberovskiy, V.V. (2013), “Hydropulsive loosening of coal layers in the preparatory developments workings ”, Coal of Ukraine, no. 2, pp. 44-47.

6. Vypolnit obosnovanie i razrabotat sposob gidroimpulsnogo vozdeistviya, kotoryu obespechivayet povysheniye bezopasnosti truda pri provedenii podgotovitelnykh vyrabotok [To execute the ground and to develop the method of hydro-impulse influence which provides increased safety during the development working]: otchet o NIR (zaklyuchit.) / M.S. Polyakov Institute of Geotechnical Mechanics under the NAScience of Ukraine; ruk. Vasilyev L.M.. – Dnepropetrovsk, 2011. – 135 p. – GR 0107U002004. – Inv. № 7078.

About the authors:

ZberovskiyVasylVladislavovych, Candidate of Technical Sciences (Ph.D), Senior Researcher, Senior Researcher in Department of  Rock Breaking Problems, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Pazynich Artem Viacheslavovich, Master of Science, Engineer in Department of Rock Breaking Problems, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Polyakov Yuriy Evgenevich,Doctoral Student, principal еngineer in Department of Rock Breaking Problems, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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