Desempenho operacional de skidder no sistema de árvores inteiras em plantio de Eucalyptus urograndis no sul do estado de Mato Grosso

Abstract

This work entitled Skidder operating performance in drag whole trees in urograndis Eucalyptus plantations in the southern state of Mato Grosso. The objective of the research was to determine the technical indicators and assess the influence of the variables in the tree extraction operation. They collected 356 work cycles for 6 shifts. Subsequently we carried out an evaluation of the time influence in the Skidder duty cycle, divided into two groups, effective time and duration of interruptions. For the regression model was used Minimum procedure square step by step, which analyzed three independent variables and the dependent variable, thus obtaining the regression coefficients and the model of the statistical parameter, R²aj and Syx%, to estimate the statistical model. The average effective time resulted in 73.30% and the average number of interruptions was 26.70% in the total cycle time, with the highest parameters influenced these percentages were shifting load and interruptions by the operator, respectively. Technical indicators obtained the following values, 90.12% for mechanical availability, 74.75% 87.43% operating efficiency and productivity. The independent variables used in the statistical model were distance carrier, number of beams and the number of trees per bundle, because they are strongly correlated with the dependent variable, the actual cycle time.