HYDRAULIC ACCUMULATING POWER PLANT WITH UNDERGROUND LOCATION OF BOTTOM POND AND METHOD OF BOTTOM POND TUNNELLING Russian patent published in 2013 - IPC E02B9/00 E21D9/02 

FIELD: construction.

SUBSTANCE: hydraulic accumulating power plant comprises a pond located on the earth surface, a water intake facility, a vertical shaft of a discharge water conduit, a communication shaft, aeration shafts, a vertical shaft of power discharge, a turbine room with aggregate blocks, a bottom pond with the main chambers and an inclined transport tunnel. The bottom pond additionally comprises short tunnels, connecting galleries, a switching chamber, discharge connecting water conduits and a distribution chamber. The main chambers of the bottom pond are made in the form of spirally arranged tunnels of round cross section in plan and are connected to each other by means of connecting galleries. Aggregate blocks of the plant unit by means of suction pipes and short tunnels are connected with the distribution chamber, which in its turn is connected with the main chambers of the bottom pond with the help of discharge connecting water conduits. The method for tunnelling of the bottom pond includes tunnelling of the main inclined transport tunnel from the surface to the underground structures with the help of a tunnelling mechanised complex and erection of the main chambers of the bottom pond. When the bottom pond main chambers are tunnelled, the switching chamber is arranged to redistribute rock discharge during tunnelling and to reduce length of rock discharge along a conveyor.

EFFECT: possibility to arrange high-discharge hydraulic accumulating power plants on plane territories, at large depths from 300 m to 2000 m, optimisation of works performance and maximum mechanisation of tunnelling of underground mines, by means of wide usage of efficient tunnelling mechanised complexes.

2 cl, 4 dwg