DYNAMICS OF HEAVY VIBRATING MACHINES TAKING INTO ACCOUNT INSTABILITY IN TIME OF THEIR PARAMETERS
Authors:   Doctor of Technical Sciences (D. Sc.), Professor, Head of Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Poljakov NAS of Ukraine (IGTM, NASU), Dnipro, Ukraine, Dyrda V. I. ,   vita.igtm@gmail.com,   https://orcid.org/0000-0002-2113-816X, Lysytsia M. I. ,   Candidate of Technical Sciences (Ph. D.), Senior Researcher, Senior Researcher in Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Poljakov NAS of Ukraine (IGTM NASU), Dnipro, Ukraine; lisitsa.n.i@gmail.com; https://orcid.org/0000-0001-6364-8937, Lapin V. A. ,   in Engineering Science, Director of Center for Scientific Research in Building Industry, Corresponding Member of International Engineering Academy and National Engineering Academy of the Republic of Kazakhstan, «KazRDICA» JSC, Almaty, Kazakhstan; lapin_1956@list.ru; https://orcid.org/0000-0002-1669-5332, Ahaltsov H. M. ,   Master of Science, Junior Researcher of Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Poljakov NAS of Ukraine (IGTM NASU), Dnipro, Ukraine; ag.gena@gmail.com; https://orcid.org/0000-0001-6296-7573, Kalhankov Ye. V. ,   Master of Science, Senior Lecturer of Department «Reliability and repair of machinery», Dnipro State Agrarian and Economic University (DSAEU), Dnipro, Ukraine; kalhankov.ye.v@dsau.dp.ua; https://orcid.org/0000-0002-4759-6687, Tolstenko O. V. ,   Candidate of Technical Science (Ph. D.), Associate Professor of Department «Reliability and repair of machinery», Dnipro State Agrarian and Economic University (DSAEU), Dnipro, Ukraine, info@dsau.dp.ua; https://orcid.org/0000-0003-4752-5704, Chernii O. A. ,   Master of Science, Senior Lecturer of Department «Reliability and repair of machinery», Dnipro State Agrarian and Economic University (DSAEU), Dnipro, Ukraine; sanek20.1984@gmail.com; https://orcid.org/0000-0003-0691-5829
Published: December 2020

Underground mining of uranium ores consists of several technological processes, one of the most important of which is the release of broken rock from the working excavation zone and loading it into transportation vehicles. The issue of increasing the intensity of production requires a simultaneous increase in the productivity of all production processes, including the production of mineral raw materials. At the same time, it is necessary to create both a high-performance and a safe process. This problem is successfully solved by the use of vibration machines with elastic links made of elastomeric materials, which, along with an increase in productivity, can reduce energy consumption and the number of freezes. An integrated approach was used, which includes analytical studies and results of industrial tests of vibratory feeders for underground mining and delivery of uranium ores and building materials. On the basis of the developed algorithm and synergistic model of fatigue microfracture of rubber links in vibratory feeder, mathematical equations were obtained, which made it possible to describe dynamics of feeders with time-depending parameters; when solving the integro-differential equation of the oscillatory system, the dependence of the amplitude characteristics of the feeder on the time of its operation is obtained. An original algorithm and synergistic model were developed, and on their basis, a mathematical apparatus was created, which allowed determining change of amplitude of vibratory feeder oscillations during its operation. On the basis of analytical calculations, a method was developed and introduced for predicting changes of parameters change of oscillation amplitudes of vibratory feeder used for underground mining and feeding of uranium ores.