Title: Relationship of coefficient of restitution and damping coefficient of rock

Authors: O. Arowojolu; S.J. Jung; A.M. Abu Abdo

Addresses: Department of Civil Engineering, University of Idaho, P.O. Box 441022, Moscow, ID 83844-1022, USA ' Department of Civil Engineering, University of Idaho, P.O. Box 441022, Moscow, ID 83844-1022, USA ' Department of Civil Engineering, Emirates College of Technology, P.O. Box 41009, Abu Dhabi, UAE

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.

Keywords: rock flow; ore pass; coefficient of restitution; damping coefficient.

DOI: 10.1504/IJMME.2020.111934

International Journal of Mining and Mineral Engineering, 2020 Vol.11 No.4, pp.323 - 337

Accepted: 15 Jul 2020
Published online: 16 Dec 2020 *

Full-text access for editors Access for subscribers Purchase this article Comment on this article