Computational Fluid Dynamics Simulations for Investigation of the Damage Causes in Safety Elements of Powered Roof Supports—A Case Study

The paper describes a case study of the safety hydraulic system damage in working longwall Polish coal mine. elements are component powered roof supports which secure shield against during rock burst incidents. event, occurred mining process, caused uncontrolled lowering support height process. may cause danger loss stability along form and collapses represent serious immediate to health employees. Based on results computational fluid dynamics methods (CFD) analysis 2-leg shield, causes were diagnosed presented. CFD strength by finite element method (FEM) used for numerical modeling. diagrams maps changes parameters having an impact mechanism leg developed based model tests. forecasted values stress distributions have made it possible identify reasons causes, verified real observations.