Skip to Content
Exit

sub-technical

Tag Archive: sub-technical

  1. Water Leaking through Old Mine Core Hole Stopped with Polyurethane

    Leave a Comment

    This underground mine, which is 1,100 feet below the surface, mined into a core hole taken from the surface.  The core hole was dumping significant amounts of ground water into the mine.  To stop the water inflow, a high-pressure probe and polyurethane grout was implemented. Grouting contractor Sub-Technical, Inc. used their specially designed probe to insert into the core hole.  The probe contains a port where polyurethane can then be injected to permanently seal it off. The polyurethane used was SealGuard II, which is manufactured by SealGuard, Inc.  SealGuard II is a dual component polyurethane grout that reacts in about 3 seconds to produce a rigid foam.  The cured foam has a 900-psi compression strength.