Selection of the Curve Trajectory Type of Dump Scroll Tracks of the Inclined Skip and Energy Analysis During Unloading

Abstract

In open pit mines, the unloading process of the inclined skip is a process of the variation in the tension of the hoisting rope, i.e. the energy of the skip-rope system, which depends on the structure of the skip and the track type of the dump scroll tracks. This study analyzes the energy consumption of a skip-rope system according to the track type of the dump scroll tracks when the inclined skips are unloaded in the dump scroll tracks. To this end, the dump scroll tracks equations are formulated and the cam design theory is applied to derive novelty equations (cosine and linear accretion track) for two types of dump scroll tracks. Next, the Discrete Element Method (DEM) software is used to analyze the skip unloading process in both tracks and the dynamic simulation is performed using Visual Nastran software. From the dynamic simulation, the tension of the hoist rope is obtained and based on it, the energy consumed during unloading is obtained. From the results of the final study, it can be seen that the cosine track is superior to the linear accretion track, regardless of the change in the characteristics of the load on the skip (egg group distribution, viscosity) in terms of the energy consumed in the skip-rope system during the unloading process. The results of the proposed study are of great significance in studying the structure and the dump scroll tracks type of large inclined skips in engineering practice.