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Application of Polyurethane in Mining Industry

Application of Polyurethane in Mining Industry
Issue Time:2017-07-18
Application of Polyurethane in Mining Industry 

Grouting with polyurethane [PU] resins represents an effective method of improvement of
mechanical and sealing properties of soil and rock environment and constructions. The
principle of grouting technologies is injection of liquid grouting material into the rock
environment or construction under pressure. During the grouting process, fissures and
pores are filled with the grouting material, which subsequently hardens and connects the
disintegrated parts of the rock mass or grains of loose material. Polyurethane grouting
technologies started to be used in the 80s of the 20th century in the mining industry. In the
last recent years, PU grouting technologies spread significantly from the mining
applications to civil engineering and geotechnics. The application possibilities have a rising
tendency and new possibilities occur. Currently, grouting technologies are used mainly in
the following fields:

Mining

strengthening and stabilization of deposit layers before exploitation
crossing of fault zones
securing of the overburden
stabilization of the surrounding of the mine workings
lowering of permeability of the rock mass 
strengthening of coal in areas with rock burst risk
limitation of the mine wind blowing
anchoring of soil and rocks
stabilization and sealing of old mine pits and etc.