公开(公告)号：CA1328564C

公开(公告)日：1994-04-19

申请号：CA543795

申请日：1987-08-05

Applicant: BASF AG

Inventor： LEUTNER BERND ,  MUELLER BERTHOLD ,  VOLKENBORN WILHELM

IPC: C04B28/14 ,  C04B38/02 ,  E21F15/00 ,  E02D3/12

Abstract: Cavities in mining are filled by introducing a mixture consisting of a slurry or sludge which evolves CO2, foams and solidifies and predominantly comprises alpha-hemihydrate, alpha-CaSO4 . 0.5 H2O, an alkali metal or alkaline earth metal carbonate and water, by a method in which the mixture is mixed with a bisulfate-containing aqueous solution or suspension of one or more metals before being introduced into the cavities to be filled.