A flexible multi-body model of a surface miner for analyzing the interaction between rock-cutting forces and chassis vibrations

The discontinuous nature of rock cutting can easily cause unwanted vibrations in the structure a surface miner. If these are not properly addressed, related stress cycles gradually damage chassis resulting fatigue failures. These events seriously undermine safety operators and digging operations may be stopped for days, with an obvious economic impact. This work presents analysis dynamics miner, focusing on interaction between machine forces, which is new approach this type machine. For purpose, authors developed numerical model process made up (1) multi-body machine, takes into account chassis’s flexibility; (2) rotating head; (3) head rock, based Shao’s model. was compared experimental results then used to investigate effects speed depth dynamics.