Problems of Bucket-Wheel Excavators Body in Hardly-Workable Grounds in Polish Open Pit Mines

Abstract

During Pleistocene the area of Poland has underwent an influence of several glaciers. This resulted in high density of ground and pushed in stones and erratic boulders of various size. Such a situation causes not only an increase of mining resistance, but also an increase of number of impact loadings and their value. According to the data, 13% of machine breakdowns in Polish open pit mines is a result of extreme geological conditions. As much again happens because of maladjustment of mining technology to a current circumstance [2]. Altogether – above a quarter of all breakdowns.