HYDRAULIC ACCUMULATING POWER STATION WITH UNDERGROUND LOCATION OF LOWER POOL AND COMBINED METHOD OF LOWER POOL TUNNELLING Russian patent published in 2013 - IPC E02B9/00 E21D9/02 

FIELD: construction.

SUBSTANCE: hydraulic accumulating power station comprises a pool located on earth surface, a water intake facility, a vertical discharge water duct, a communication shaft, an aeration shaft, an inclined shaft of power delivery, a station unit with hydraulic units, a lower pool with main chambers and an inclined transport tunnel. The lower pool additionally contains short tunnels, connecting galleries, discharge connecting water ducts and a distributing chamber. Main chambers of the lower pool are made in the form of helically arranged tunnels in plan. The station unit with hydraulic units is placed in the centre of spirals of the lower pool. Hydraulic units of the station unit by means of suction pipes and short tunnels are connected with the distributing chamber, which by means of discharge connecting water ducts arranged radially relative to it, is connected with the main chambers of the lower pool. The lower pool is tunnelled by a combined method consisting in tunnelling of the main inclined transport tunnel from the surface to underground facilities with the help of a tunnelling mechanised complex and arrangement of main chambers of the lower pool. At the same time in parallel to the main inclined tunnel an additional transport tunnel is arranged, and then the lower pool is arranged, which is a continuation of transport tunnels. The lower pool is arranged in two stages: at the first stage a pilot mine is tunnelled with an open tunnelling mechanised complex, and at the second stage, using blast-hole drilling, it is finalised to design contour. Simultaneously with tunnelling of the main chambers of the lower pool they arrange a station unit with hydraulic units, which is located in the centre of spirals of the lower pool.

EFFECT: invention makes it possible to solve a problem of placement of high-discharge hydraulic accumulating power plants in plain territories, by arrangement of a lower pool and a discharge station unit under earth at depths from 300 m to 2000 m, and to optimise works performance and to mechanise tunnelling of underground mines to the maximum, through joint usage of open production tunnelling mechanised complexes and up-to-date equipment complex for performance of blast-hole drilling.

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