Investigation of the failure of the bucket wheel excavator bridge conveyor

Abstract The fundamental parameter which determine the design of the structure and proofs its safe operation, is list of dead and live/operational loads together with its distribution. That defines the stability of unit. In case of mining machinery, due to its specific layout and enormous size, occurrence of the stability loss can result in catastrophic failure. In the paper, authors present investigations of the stability loss of discharge bridge operating with bucket wheel excavator. Authors, step by step, present the definition of overturning edges, weighing and balancing process. Moreover, numerical simulations and experimental testing of the structure are presented. On the basis of acquired data, cause of the stability loss and assessment of influence of this incident to the structure is provided.

[1]  Eugeniusz Rusiński,et al.  Material handling and mining equipment: International standards recommendations for design and testing , 2018 .

[2]  Damian Pietrusiak,et al.  Distribution of loads in the large size bearing – problems of identification , 2013 .

[3]  R Morgan.  Design of materials handling machines to AS4324.1-1995 , 2012 .

[4]  Srđan Bošnjak,et al.  From ‘a priori’ to ‘a posteriori’ static stability of the slewing superstructure of a bucket wheel excavator , 2018 .

[5]  Nebojša B. Gnjatović,et al.  Basic parameters of the static stability, loads and strength of the vital parts of a bucket wheel excavator’s slewing superstructure , 2016 .

[6]  Srđan Bošnjak,et al.  Procjena integriteta zavarenih spojeva rotornog bagera primjenom metode jednostrukog izbora , 2013 .

[7]  Richard Morgan,et al.  Investigation of revised AS 4324.1 partial load factors for steel bulk materials handling structures , 2016 .

[8]  Predrag Jovančić,et al.  Lost production costs of the overburden excavation system caused by rubber belt failure , 2012 .

[9]  Brian Uy,et al.  Reliability analysis for load factors in steel bulk material handling structures with respect to AS4324.1 , 2016 .

[10]  Dongming Xiao,et al.  Low-Frequency Vibration Testing of Huge Bucket Wheel Excavator Based on Step-Decay Signals , 2018 .

[11]  Alain Nussbaumer,et al.  Beurteilung bestehender Stahltragwerke: Empfehlungen zur Abschätzung der Restnutzungsdauer , 2008 .

[12]  Zoran D. Petković,et al.  Failure investigation of the bucket wheel excavator crawler chain link , 2013 .