Selection of technological parameters in borehole mining production by technical deep drilling and hydroexploitation

This paper shows the estimate technological parameters for borehole hydro-production of sand by technical deep drilling slim well differently diameters, where are determinate calculation of radius of jet for selects hydro-monitor, the effect of hydro-caving, caving capacity, hydro-transport of pulp and drawings of the most important parts of necessary equipment for exploitation at the mining field exemplified by experimental borerhole hydro-mining of underlying quartz sand at surface open pit mine of coal named the Polje-D in Kolubara. Summary With organizing the excavation technology of loose raw materials through the boreholes, considering the complexity of technological operation, the most important thing is to calculate technical-technological parameters of exploitation and to make an optimal selection of pump aggregate, pipe line and pulp line, and also to project and construct the equipment for drilling and obtaining of concrete deposit conditions since there is no serial production. Hydro monitor presents its most important part that forms and directs the strength of water stream through the jets to break the quartz sand near the borehole, while the hydraulic elevator under the pressure lifts the pulp to the surface of the ground. The boreholes technology uses the strength of water stream to excavate and to lift excavated materials through the boreholes. The essentional engine for the exploitation is hydro monitor there the water pass through the jet and leaves it with great velocity and so disintegration of binded sediment the quartzes sand. The mixture of water and sand (hydro mixture) are transport by the gravitation along the bottom of chamber until the opening on the casing tube in the suction zone, there the mixture by the under pressure are lift and transport through the interior pipe to the surface of the ground. By the system of horizontal hydraulic transport hydro-mixture are transporting until the settling reservoir. Sand is deposit and water by the system of over flowing comes into the sump, and thence the water is, by pump, back into the system. Excavation of solid mineral row materials through the boreholes started in “Kolubara”, their experts with that technology experimentally excavated floor sands on the open pit of coal in “Field-D.