Simulating breakage tests using the discrete element method with polyhedral particles

Several tests are normally used to analyze the resistance of rocks and ores to breakage in the mining/aggregate industries. Some of these tests yield results that serve as basis for either simple mathematical expressions or comprehensive models, whereas others are essentially only used to classify a rock or ore in comparison with others. The present work demonstrates that the outcomes of three of these tests, namely the Bond crushability index, the JK Drop Weight Test and the Los Angeles abrasion test, can be predicted from simulations using the discrete element method with polyhedral particles with a particle replacement model. In addition to that, a sensitivity analysis of the predictions for the drop weight test results on the basis of selected simulation variables is analyzed, resulting in recommendation of optimal values. The work demonstrates the validity of the breakage model and its ability to describe outcomes of tests that are recognized to capture different aspects of the breakage response of brittle particulate materials.

Automated summary

Several tests are commonly used in the mining and aggregate industries to analyze the resistance of rocks and ores to breakage, providing basis for mathematical expressions or models. This study shows that simulations using the discrete element method with polyhedral particles can predict outcomes of three specific tests, with sensitivity analysis recommending optimal values for the drop weight test. The validity of the breakage model and its ability to describe test outcomes for brittle particulate materials are demonstrated.