METHOD FOR STRENGTHENING AND SEALING COAL AND / OR MOUNTAIN, EARTH OR BRICK INFORMATION IN MINING, TUNNEL CONSTRUCTION AND IN THE CONSTRUCTION INDUSTRY.

摘要

The invention relates to a process for consolidating and sealing coal and/or rock, soil and brick formations in mining, tunnelling and construction by reacting polyisocyanates and aqueous alkali silicate solutions in the presence of a catalyst prompting the trimerization of the polyisocyanate. The catalyst is used in an amount of 6.0 to 14.5 mmole per mole of NCO groups in the reaction mixture. When the reaction mixture is introduced into the coal and/or rock, soil and brick formation to be consolidated and is cured, excellent consolidation results are achieved on account of the formation of an "interpermeated network" of inorganic and organic polymer.