SPECIFIC FEATURES OF INFLUENCE OF PROPULSION PLANTS OF THE WHEEL-TYRE TRACTORS UPON THE CRYOMORPHIC SOILS, SOILS, AND SOIL GROUNDS

Forest ecosystems on the cryomorphic soil grounds are very vulnerable. Harmful effect of forestry machines upon the ecosystems of the felling-areas (due to consolidation and deformation of the soil grounds) is well known in Russia and abroad. Operation of forestry machines and yarding-and-loading systems in respect of frozen soil grounds shows a clear need for taking this factor into account and considering it as the complex multicomponent environment. In the course of preparation of our article, our have developed and substantiated a mathematical model and approach to assessment of lifting properties of the frozen soil grounds. This model makes it possible to reformulate norms of operation of the forestry yarding-and-loading and other machines. Taking into account the approach, which we have proposed to utilize in respect of simulation of the ground lifting properties, will make it possible to perform forest management interventions in the least invasive mode, thus ensuring the faster natural reproduction of the forest plantations, as well as the prolonged time framework performance of the work that is connected with timber harvesting. In the conditions of the Russian Extreme North, this fact may be transformed into an essential economic effect.