公开(公告)号：DE3629477A1

公开(公告)日：1988-03-03

申请号：DE3629477

申请日：1986-08-29

Applicant: BASF AG

Inventor： LEUTNER BERND DR ,  MUELLER BERTHOLD DR ,  VOLKENBORN WILHELM DIPL ING

IPC: C04B28/14 ,  C04B38/02 ,  E21F15/00 ,  E21F15/08

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.