Ural State Mining University, Yekaterinburg, Russia:

D. V. Belyushin, Post-Graduate Student
Yu. A. Lagunova, Professor, Doctor of Engineering Sciences, yu.lagunova@mail.ru

The study was aimed to determine factors and methods to adjust protective properties of elastic lining by analyzing impact interaction between lined impact surfaces and rock mass. The analysis of tests data on vibro-machines is presented. The experiments were carried out on a laboratory test bench simulating a vibro-feeder box at a ratio of 1:4. Using SPSS Statistics software package and the method of least squares, the regression analysis of the earlier experimental data is performed. The test data have been approximated at a high level of reliability and adequacy by the resultant regressional relationships between stresses induced in the box, pressing-in depth, parameters of protective rubber lining (hardness and area) and energy of impact simulating falling of rock fragments on working surface of mining machine. The constructed mathematical model determines rational or optimal parameters of stress state of protected surface and deformation characteristics of lining. Based on the research finding, the possibility to select the value of thickness of rubber lining layer is proved. The results are applicable in new designs of elastic lining having higher protective properties at reduced cost.

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