Preventive Replacement Decisions for Dragline Components Using Reliability Analysis

Abstract

Reliability-based maintenance policies allow qualitative and quantitative evaluation of system downtimes via revealing main causes of breakdowns and discussing required preventive activities against failures. Application of preventive maintenance is especially important for mining machineries since production is highly affected from machinery breakdowns. Overburden stripping operations are one of the integral parts in surface coal mine productions. Draglines are extensively utilized in overburden stripping operations and they achieve earthmoving activities with bucket capacities up to 168 m 3 . The massive structure and operational severity of these machines increase the importance of performance awareness for individual working components. Research on draglines is rarely observed in the literature and maintenance studies for these earthmovers have been generally ignored. On this basis, this paper offered a comprehensive reliability assessment for two draglines currently operating in the Tunçbilek coal mine and discussed preventive replacement for wear-out components of the draglines considering cost factors.

The Analysis of Conditions of Hydraulic Backhoes Use in the Coal-Bearing Zones at Kuzbass Open Pits

“…Technological features of open pit mining operations in the coal-bearing zone are: -the height of the bench here is equal to the height of the bench of the coal-less zone, where powerful rope shovels made in Russia and former Soviet Union (ECG-5A, ECG-8I, ECG 10, ECG-12, ECG-15, ECG-20 with bucket capacity 5-20 m 3 ) and "Harnischfeger" models are used, with the bench height of 10-16 m. The equality of the heights of the benches in both zones is due to technological requirements [4][5][6]; -in the calendar planning, trenches and coal-and rock stopes are cut with the height equal to the height of benches in the coal-less zone. When they are developed, an alternate excavation of rock and coal is carried out.…”

Theoretical Features of Rope Shovels and Hydraulic Backhoes Using at Open Pit Mines

“…The following research methods are used in the work: analysis of mining operations on surface mines; analysis and synthesis of scientific research and technological development results; statistical method for processing the results of observations [1].…”

Optimizing replacement time for mining shovel teeth using reliability analysis and Markov chain Monte Carlo simulation

“…Mining is machine intensive and production is negatively affected by machine breakdowns (Demirel and Gölbaşı, 2016). Therefore, PM planning is significant for preventing production losses.…”