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目前,我国伐区集材的主要方式为拖拉机集材和架空索道集材。前者适于坡度小于50％的林地集材使用,后者适于坡度大于50％的林地集材使用。一、集材机牵引力和阻力的计算集材机牵引力的选择决定于集材阻力和集材量。集材阻力与集材方式、林地(集材道)状况和坡度大小有关。集材方式有全悬空式、半拖地和全拖地三种,如图1所示。图1中a与g为全拖地式集材,b、d、与e为半拖地集材,c与f为全悬式集材。
At present, the main methods of cutting timber in our country are tractor skidding and overhead ropeway skidding. The former is suitable for woodland skins with a slope of less than 50%, and the latter is suitable for woodland skins with a slope of more than 50%. First, the skidder traction and resistance calculation Skidder traction depends on the choice of resistance and the amount of skid timber. Skid resistance and skidding methods, woodland (Skid Road) conditions and the size of the slope. Skidding all-suspended manner, semi-mopping and all-mop three, as shown in Figure 1. In Figure 1, a and g are all milled floor skids, b, d and e are semi-mowed skids, and c and f are all-suspended skids.