Bondarenko A. Grounding rational parameters of the working body of unit for submarine production of the alluvial minerals

The thesis is devoted to the question of development of methods for accounting rational parameters of the working body of unit for ecologically sparing extraction of alluvial minerals. The perspectives of using the ground-extraction body with hydraulic loosener, allowing to take ground from under a bottom surface during submarine mining of alluvial minerals from depths up to 100m, are grounded. The process of incoherent ground loosening by a water jet in constraint conditions under bottom surface and interaction of processes of ground loosening and pulp suction are investigated. As a result of theoretical and experimental researches, the analytical expressions for determining geometrical parameters of underbottom loosening zone and also the analytical expressions allowing to rationalize the process of ground extraction by the working body with a jet transport pump are obtained. The successful industrial tests of the working body are conducted