Seminska N. The improvement of hydrojet technologies in view of features of a high pressure jets formation.

The object of the research is hydrodynamic processes of stationary and non-stationary high pressure jets forming. The work is devoted to improvement of hydrojet technologies which are used for solids destruction. Тhе main aim of the work is the theoretical and experimental researches of factors, which have essential influence on structure of a high pressure jet and its destroying ability. The influence of hydrodynamical and design parameters on stages of formation and outflow of a high pressure jet were determined. The complex,scientifically-proved design procedure of hydrodynamical characteristics of a jet and definition of the jet-forming device parameters were offered. The results of the researches and design procedure were introduced in scientifically-research and construction works on creation of tunnelling machines of a new technical level and recommended with Lugansk Mine Management for designing of mining technology.