Relationship of coefficient of restitution and damping coefficient of rock Online publication date: Mon, 21-Dec-2020
by O. Arowojolu; S.J. Jung; A.M. Abu Abdo
International Journal of Mining and Mineral Engineering (IJMME), Vol. 11, No. 4, 2020
Abstract: When rock travels through an ore pass, it falls, hits other rock materials, and ore passes walls. It is essential to understand the material flow and rock particle interactions in an ore pass to avoid hang-ups and accidents involving rock flow. Part of that understanding is to comprehend how rock reacts when it collides with other particles and other materials. It is difficult to determine the coefficient of restitution and the damping coefficient experimentally simultaneously. The objective of this study was to investigate the relation between the two parameters and determine their correlation mathematically. While it is difficult to measure the damping coefficient of rocks in a laboratory directly, results showed that it could be determined mathematically using the coefficient of restitution. Thus, it facilitates the use of rock flow dynamics simulation programs. Furthermore, the analysis showed that the coefficient of restitution exponentially decayed as the damping coefficient increased.
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