Reliability-based analysis of probability density function and failure rate of the shovel–dumper system in a surface coal mine

Abstract

The research article presents a reliability-based analysis of probability density function, and the failure rate of a shovel-dumper system was determined based on Weibull distribution in an open cast coal mine. Referring to the bathtub-model along with the Weibull distribution of a shovel and dumpers, decreasing, constant and increasing failure rates are represented using the RWB. To demonstrate the bathtub model and reliability model of combining shovel and dumpers, historical data such as TBF and TTR were used. The obtained bathtub curve shows that the influencing parameters such as β, η and γ had a better useful life after 7080 working hours. Also, the ANN model was developed to predict the PDF, failure rate and reliability function. It has been found that the values of RMSE and R2 were 0.00068 and 0.9565 for PDF, 0.0004342 and 0.98904 for failure rate and RMSE and R2 were 0.9739 and 0.000497 respectively.