Sensitivity Analysis of Tangential Digging Forces of the Bucket Wheel Excavator SCHRS 1320 for Different Terraces

Abstract

Abstract. Researches in the field of economy of control of mining processes of minerals are continually met with a number of unsolved and newly arising problems. New deposits of brown coal are located at greater depths than before and are more difficult to mine. Problems in the field of rock mining stem from the greater diversity of rocks in mining, and it results in more difficult mining conditions. On the other hand, even greater demands are made to decrease the economic demand of mining. Current research is aimed at the most optimal utilization of energy provided on the bucket wheel of excavators, such that the energy demand of the mining process decreases, whilst preserving maximum performance. These requirements place greater demands on the precision of planning of mining and maximum economic efficiency. The presented article illustrates the possibilities of the utilization of Sobol sensitivity analysis during the investigation of the influence of the parameters of mining processes on tangential digging forces. Analyses are carried out for the mining process of bucket wheel excavator SchRs 1320. For purposes of the study, detailed measurements of operational parameters were performed on the excavator during a whole work cycle.

The influence of constructive parameters on response of bucket wheel excavator superstructure in the out-of-resonance region

“…Although the current engineering codes and national standards used in calculations ignore the dynamic character of BWE external loads, the investigations of BWE dynamics are extremely important [6]. The aforementioned studies include problems of determining excitation induced by resistance-toexcavation [4,7,10], problems of determination and measurement of natural frequencies of BWEs' structures as well as their vibrations during mining process [8,9,[12][13][14][15][21][22][23]. a r c h i v e s o f c i v i l a n d m e c h a n i c a l e n g i n e e r i n g x x x ( 2 0 1 5 ) x x x -x x x a r t i c l e i n f o This paper examines influence of constructive parameters on response of BWE SchRs 1760 superstructure ( Fig.…”

Buckling and post-buckling of the von Mises planar truss

“…The influence of change of the vertical displacement of top joint on deformed shapes of the von Mises planar truss is analyzed. The paper links up with studies of stability problems of steel structures [8][9][10][11][12][13][14][15]. …”

Disaster of the bucket wheel excavator caused by extreme environmental impact: Consequences, rescue and reconstruction

“…Bucket wheel excavators (BWE) are exposed to environmental impacts, predominantly those of the excavated soil [1][2][3][4][5]. Even in regular exploitation conditions, the outstandingly dynamic and stochastic character of the loads caused by soil impacts provides fertile ground for the occurrence of failures of structures or substructures [6][7][8][9][10][11][12] as well as mechanism parts [13][14][15][16][17][18][19][20][21].…”