Method of closure of a mine cylindrical wells with the aid of a plug 1 shows an axial half cross section, in particular, in view of the radioactive waste materials, warehouse.

摘要

Method for closing, in particular, a cylindrical shaft bored in hard rock, using a male threaded plug. A cylindrical shaft head (1) is bored, the diameter D1 of which is greater than that d1 of the rest (3) of the construction (shaft); a female thread (11) is cut into the said shaft head (1), the edges (12) of which threads are rounded; the connection between the bottom of the shaft head (1) and the rest (3) of the construction is machined, with a view to obtaining a rounded and convex connection (13); and a male thread (22), corresponding to the female thread (11), is made in a plug (2) formed by a cylindrical block of the same natural material as that of the shaft head (1), covered by a head (21) whose diameter d2 is slightly less than that D2 of the shaft head (1) opening, the said threaded plug (2) ending in a frustoconical part (25) intended to bear on the convex connection (13) between the shaft head (1) and the rest (3) of the construction. IMAGE