VENTILATION CONTROLS: Where permanent seals are leaking through roof, rib or floor. Ring or partial ring injection can secure the periphery, or seal the body itself from leakage.

CONTROL OF FLOOR HEAVE: Where ground pressure results in floor heave Polyurethane injection can provide a solution by creating a beam across the entry rib, eliminating or controlling floor movement. The exact inverse of roof control.

RIB CONSOLIDATION: Where rib spalling is a specific problem especially in high extremes. Rib injection can provide a much higher degree of consolidation reducing a major hazard.