| abstract |
The invention describes a method of consolidating rock for, for example, tunneling and mining, by injecting an aqueous preparation of melamine resin and / or urea formaldehyde condensates with a hardener. acid. The process is characterized by the fact that aqueous solutions of salts of hydrogen sulphate, in particular solutions of alkali-and / or ammonium bisulphate, are used as hardener. The hardening solutions may contain additional active or auxiliary substances such as corrosion inhibitors, structuring agents and adhesives. Preferred curing solutions for consolidation with these aqueous hardeners contain an additive of NaA and / or hydrosodalite zeolite to improve their usability and, particularly, to prolong their shelf life. |