Dubinin M.V., Ilyin S.R. Determination of dynamic parameters for the systems “skip-shaft equipment” by the method of solid modeling

Details

Parent Category: Geo-Technical Mechanics, 2020

Category: Geo-Technical Mechanics, 2020, Issue 150

Geoteh. meh. 2020, 150, 82-97

https://doi.org/10.15407/geotm2020.150.082

 

DETERMINATION OF DYNAMIC PARAMETERS FOR THE SYSTEMS “SKIP-SHAFT EQUIPMENT” BY THE METHOD OF SOLID MODELING

¹Dubinin M.V., ²Ilyin S.R.

¹Branch of Scientific Research Institute of Mine Mechanics named by M.M. Fedorov, Kyiv, ²Institute of Geotechnical Mechanics named by N. Poliakov of National Academy of Sciences of Ukraine

UDC 622.673.1:622.272.6

Language: Russian

Annotation.

With increased service life of the shafts the problem of ensuring safe movement of skips along the rigid reinforced guides is especially urgent both for designing of new shafts and reconstruction (modernization) of the old ones and requires a diverse and systematic study of the equipment, which is already in operation or newly designed, by the criterion of mutual suitability and high degree of failure-free operation. For old shafts that have geometrical disturbances due to geological processes and severe corrosion and mechanical wear, additional studies of interaction between the elements of the “skip – shaft equipment” (SSE) system are also needed in order to identify emergency sections of the shaft equipment and to make decisions and develop measures for bringing these sections to safe and trouble-free condition.  By the finite element modeling, we obtained rigidity parameters for the most common schemes of the shaft equipment and skip designs and amplitude-frequency parameters for the SSE systems widely used by the domestic coal-mining enterprises. The obtained calculation results for individual SSE elements and their interactions correspond to the results obtained by Garkusha and Dvornikov; however, this approach allows us to take into account all the design features of the SSE system equipment (as well as their interacting nodes) and geometric changes in shaft equipment due to geological and “time” factors (mechanical wear and corrosion). The possibility of determining the design flaws of the SSE system elements and their further consideration in the “selection” of rigidity and, accordingly, frequency characteristics for the SSE system elements makes the finite element modeling an indispensable tool both at the stages of designing the elements and their subsequent operation and/or possible reconstruction (with taking into account their actual technical condition). Long-term operation of the hoisting plants in difficult geological conditions inevitably leads to structural changes in their elements. At the same time, over the course of several decades, new types of basic units appear that change the design schemes of t this equipment. All this requires, when conducting expert studies and safety assessments, to carry out a significant amount of dynamic calculations that are not inherent in the classical Methodology developed by the Scientific Research Institute of Mine Mechanicsnamed by M.M. Fedorov. In this situation, the only way out is to develop a new methodological approach, which would take into account new changes and adequately and reliably evaluate the safety of the operation of the hoisting equipment under conditions of its high wear and growing deviations of its geometric parameters from the design values.

Key words:

dynamic parameters, lifting vessels, armouring, solid-state design

References

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About the authors

Dubinin Mykhaylo Valeriiovych, Master of Scsence, Researcher, M.M. Fedorov Research Institute of mining mechanics (RIMM), Kyiv, Ukraine.

Iljin Serhii Rostyslavovych, Candidate of Technical Sciences (Ph.D.), Senior Researcher, Senior Researcher of the Department of Rock Thermoaerodynamics and Automated Systems, Institute of Geotechnical Mechanics named by N. Poliakov of National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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