METHOD FOR EXCAVATING A VERTICAL ROCK CAVERN HAVING AN ELLIPTICAL OR OVAL CROSS SECTION AND A ROCK CAVERN MADE BY THE METHOD

摘要

The present invention refers to a method for excavating a vertical rock cavern having an elliptical or oval cross section, whereby access from ground level to the cavern takes place via a ramp or through a vertical shaft, and that the cavern is intended for the storage of bulk products, e.g. gas and/or fluids. Vertical rock caverns combine a good environment for storage with favourable rock stability in the surrounding rock, which is a pre-requisite for being able to construct caverns with large spans. However, the work of excavating a vertical rock cavern has not been carried through in a sufficiently efficient manner as the work has, among other things, taken place on far too many levels. The procedure according to the invention is distinguished in that a roof section (2) and a bottom section (3) are developed on at least two levels, and that the volume existing between them is bench drilled, blasted and removed.