PROBABILISTIC AND STATISTICAL EVALUATION OF LOGGING MODES
Timber hauling traction refers to stochastic technological processes (TP). Its main feature is probabilistic nature of course phenomena with ran-dom variability of parameters reflecting the modes of execution of individual operations and overall process. The variability of TP modes skidding is influenced by many factors. First of all they are fac-tors of natural-production conditions, organization-al-technological and design features of technical equipment, personnel's professionalism, ergonom-ics, etc. The technique of probabilistic and statisti-cal assessment of the modes of performance of the process of wood skidding was created. Using prob-abilistic and statistical approach mathematical models allowing establishing expenses of time and energy, reflecting the modes of performance of op-erations of production cycle of skidding of assort-ments by wheel loader were developed. Numerical probabilistic and statistical characteristics of pa-rameters of time and energy expenses on the per-formance of separate operations and in general the process of skidding of assortments were experi-mentally received using developed the technique of continuous wood cutting. The greatest expenses of time and energy fall on the performance of opera-tions of loading and unloading. They make 73.3 and 70.6 % of production cycle expenses respec-tively. Offered technique can be applied both for forecasting rational technological decisions and practical assessment of effective use of chosen process of skidding assortments by wheel assortment collector. The realization of the technique was ap-proved on the example of the work of wheel assort-ment collector of middle class with the wheel scheme of 8K8 on wood skidding under continuous cutting via narrow-gap technology. Wheeled wood assortment pick-up has payload capacity of 14500 kg at the weight of 15000 kg and power capacity of 205 kW.