Title

Case Study: Planar Kinematics of Dragline for Efficient Machine Control

Abstract

Overburden excavation is an integral component of the surface mine production chain. In large mines, the walking dragline is a dominant strip mining machine. Dragline performance depends on the operating speed, the bucket payload, and the machine availability, which could be negatively impacted by the actions taken to increase the machine productivity. In this study, the writers develop the kinematics and dynamic modeling of a dragline front-end assembly using the vector loop and simultaneous constraint methods. Based on the results of the kinematics and dynamic simulations, stress modeling and analysis are performed. Detailed analysis of the simulation results show that the angular accelerations of the drag and hoist ropes are close to zero, which indicate very smooth simulated operations. The respective maximum drag and hoist forces are 100 and 75 kN, which also indicate a dominant drag operation. The maximum stress loading of the boom's Arm-1 (166.5 MPa) and Arm-2 (159.9 MPa) are less than the boom yield stress at 305 MPa. These results indicate machine health and longevity within the simulated conditions.

Department(s)

Mining and Nuclear Engineering

Keywords and Phrases

Case Reports; Computer Aided Simulation; Dynamic Loads; Numerical Models; Stress Distribution

Library of Congress Subject Headings

Excavation
Kinematics

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2009 American Society of Civil Engineers (ASCE), All rights reserved.

Share

 
COinS