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Pacific International Grout Company has developed an assortment of equipment and quick set materials for controlling ground, raveling rock, in front of, over, or behind TBM’s and other mining machines. Process equipment and materials are portable and very user friendly. Components are easily adapted to the trailing gear without disrupting tunnel construction and production.
Materials can be batched at portals, shafts and pumped into the face. In addition, they can be produced at the trailing gear and injected.
Virtually any mix design can be produced or modified in a single operation. Sets may be as fast as two seconds or as slow as one hour. Compressive strengths are variable from 100 to 500 psi in fifteen minutes or less. These systems are extremely effective where voids are encountered resulting in difficulties or stoppages. If a void in front of the machines is detected, low strength, quick set grout is injected into that area and mining is resumed. Leaks through the shield are minimal due to accelerated grout set. The low strength material prevents the shield or cutter head from being cemented in.