Polymer resins with foam effect and their application in mining

Abstract

For stabilization of degraded rock massif around the built underground mining premises, the procedures of injecting of polymer synthetic resins with foam effect are in use today more and more. By injecting of polymer resins in drill holes or cracks and their hardening, the spreading of deformity by depth is stopped, and therefore the stability of degraded rock material and built premises is provided. For increasing the stability of mining premises, the fast reacting phenolic resins are used, filling up the cracks in the cracked rock mass and preventing their expansion. In that way they contribute improving the operative safety and efficiency in building the mining premises. Few years ago, two-component poliurethan foamy resins appeared that have found an application for strengthening, insulation and rehabilitation of mining premises demanding a medium or longer period of usage. Urea of silicate non-flammable resin is approved for usage in the coal mines and in building the underground premises in heavy work conditions. Stabilization and strengthening of weaked zones in these cases is done by combining the drainage and injecting the fast reacting foamy resins. New materials and technologies have enabled very significant improvements in many areas of mining and constructions, both in domain of faster, safer and more efficient building, and in domain of maintenance and rehabilitation the mining and construction facilities.

Keywords

• foamy polymer resins
• strengthening and stabilization
• degraded rock massif
• mining
• construction
• geotechnics