Dynamic Simulation of Cable Shovel Specific Energy in Oil Sands Excavation
Oil sand excavation requires the use cable shovels which constitute one of the major costs in surface mining operations. Random occurrences of shales and limestones within the Athabasca oil sands formation result in varying shovel diggability and stress loading of the boom-crowd-dipper-teeth assembly which reduces digging efficiency. This inefficient use of cable shovels negatively affects the return on capital investment in these otherwise effective machines. In the Athabasca oil sands, varying stress loading has the potential to increase shovel downtime and increase maintenance costs. This paper presented a newly developed cable shovel simulator that uses shovel kinematics and dynamics, dynamic cutting resistance and payload models. It can model the specific energy needed to overcome the resistance to machine motion and material digging. The comprehensive model considers both machine motion and machine-formation interaction forces. It also provides a comprehensive theoretical assessment of shovel performance. The model is useful to mining engineers when examining both the machine operating parameters and material parameters that influence shovel performance. The study showed that bulk density is the most important material property influencing diggability. Operator preferences also influence the specific energy of excavation.
K. Awuah-Offei et al., "Dynamic Simulation of Cable Shovel Specific Energy in Oil Sands Excavation," Proceedings of the 14th International Symposium on Mine Planning and Equipment Selection, Reading Matrix, Jul 2005.
Mining and Nuclear Engineering
Keywords and Phrases
Bucket Wheel Excavators; Cost Efficiency; Dynamic Loads; Mining Equipment; Oil Sand Mining; Oil Shales and Tar Sands
Article - Conference proceedings
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